Current Issue

  • Research Article 2023-09-22

    0 31 7

    Expression Analysis of Sweetpotato Sporamin Genes in Response to Infection with the Root-Knot Nematode Meloidogyne incognita

    Jung-Wook Yang ・Yun-Hee Kim

    J Plant Biotechnol (2023) 50:163-168


    Abstract : Sweetpotato (Ipomoea batatas [L.]) is a globally important root crop cultivated for food and industrial processes. The crop is susceptible to the root-knot nematode (RKN) Meloidogyne incognita, a major plant-parasitic RKN that reduces the yield and quality of sweetpotato. Previous transcriptomic and proteomic analyses identified several genes that displayed differential expression patterns in susceptible and resistant cultivars in response to M. incognita infection. Among these, several sporamin genes were identified for RKN resilience. Sporamin is a storage protein primarily found in sweetpotato and morning glory (Ipomoea nil). In this study, transcriptional analysis was employed to investigate the role of sporamin genes in the defense response of sweetpotato against RKN infection in three susceptible and three resistant cultivars. Twenty-three sporamin genes were identified in sweetpotato and classified as group A or group B sporamin genes based on comparisons with characterized sweetpotato and Japanese morning glory sporamins. Two group A sporamin genes showed significantly elevated levels of expression in resistant but not in susceptible cultivars. These results suggest that the elevated expression of specific sporamin genes may play a crucial role in protecting sweetpotato roots from RKN infection.

  • Research Article 2023-09-06

    0 106 17

    In vitro micropropagation of radish (Raphanus sativus L.) using callus induction and plant regeneration

    You Kyoung Kim ・Sug Youn Mo ・Su Bin Choi ・Han Yong Park

    J Plant Biotechnol (2023) 50:155-162


    Abstract : Radish (Raphanus sativus L.), a root vegetable grown worldwide, is consumed in several ways. In the cross between parental lines to produce F1 seeds of radish, the problem of low purity may arise because of pollen contamination. Therefore, we aimed to establish conditions for callus induction and regeneration so that in vitro cultured plants could be used for the propagation of stock seeds. The most effective hormone combination containing various concentrations of 2,4-D, TDZ, and kinetin was selected for callus induction using radish hypocotyl, and the induced calli were transferred to two types of hormone media to investigate the optimal conditions for shoot regeneration of the callus. The combination of 1 mg/L 2,4-D + 0.05 mg/L kin was the most effective for callus induction of RA2 and RA10, 1 mg/L 2,4-D + 0.1 mg/L kin + 0.025 mg/L TDZ of RA4, and 1 mg/L 2,4-D + 0.2 mg/L kin of RA30. Shoot regeneration of the RA4 callus occurred in both shoot regeneration media, but the frequency was much higher in the 5H+1B medium (1 mg/L NAA + 0.1 mg/L 2,4-D + 1 mg/L IPA + 0.02 mg/L GA3 + 2 mg/L zeatin + 1 mg/L BA). For the in vitro micropropagation of radish, the conditions selected in this study can assist in the propagation and maintenance of stock seeds to produce F1 seeds.

  • Review 2023-08-29

    0 80 17

    Plant abscission: An age-old yet ongoing challenge in future agriculture

    Jinsu Lee

    J Plant Biotechnol (2023) 50:142-154


    Abstract : Plant abscission is a natural process in which plant organs or tissues undergo detachment, a strategy selected by nature for the disposal of nonessential organs and widespread dissemination of seeds and fruits. However, from an agricultural perspective, the abscission of seeds or fruits represents a major factor that reduces crop productivity and product quality. Therefore, during the crop domestication process in traditional agriculture, mutants exhibiting suppressed abscission were selected and crossbred, thereby enabling the production of modern crop varieties such as rice, tomatoes, canola, and soybeans. These crops possess a unique trait of retaining ripe fruits or seeds in contrast to disposal via abscission. During the previous century, research on quantitative trait loci along with genetic and molecular biological studies on Arabidopsis thaliana have elucidated various cell biological mechanisms, signaling pathways, and transcription regulators involved in abscission. Additionally, it has been revealed that various hormone signals, which are involved in plant growth, play crucial roles in modulating abscission activity. Researchers have developed several chemical treatments that target these hormones and signal transduction pathways to enhance crop yields. This review aimed to introduce the previously identified signal transduction pathways and pivotal regulators implicated in abscission activity. Moreover, this review will discuss the future direction of research required to investigate crop abscission mechanisms for their potential application in smart farming and other areas of agriculture, as well as areas within model systems that require extensive research.

  • Research Article 2023-07-11

    0 249 40

    Antioxidant and anticancer activities of Adenophora triphylla leaf and root extracts

    Seon Young Yoon ・Ki Hyun Kim・Tae Kyung Hyun

    J Plant Biotechnol (2023) 50:137-141


    Abstract : The root of Adenophora triphylla is a highly valued medicinal resource that is used to prevent human obesity, cancer, and inflammation, whereas young leaves or sprouts of A. triphylla are used as food ingredients. In this study, we compared the antioxidant and anticancer activities of 70% ethanol extracts of A. triphylla roots and leaves. The leaf extract exhibited stronger 2,2-diphenyl-1-picrylhydrazyl (DPPH)-radical scavenging activity, reducing power, and oxygen radical absorbance capacity (ORAC) than the root extract. Furthermore, the leaf extract was observed to be a potent source of anticancer compounds that were effective against A549 (lung cancer), LNcaP (prostate cancer), SKOV3 (ovarian cancer), and Caco-2 (colorectal cancer) cells. These results indicate that not only the roots but also the leaves of A. triphylla can serve as valuable sources of functional materials in the pharmaceutical industry.

  • Research Article 2023-06-22

    0 310 60

    Chlorophyll contents and expression profiles of photosynthesis-related genes in water-stressed banana plantlets

    Sri Nanan Widiyanto ・Syahril Sulaiman ・Simon Duve ・Erly Marwani ・Husna Nugrahapraja ・Diky Setya Diningrat

    J Plant Biotechnol (2023) 50:127-136


    Abstract : Water scarcity decreases the rate of photosynthesis and, consequently, the yield of banana plants (Musa spp). In this study, transcriptome analysis was performed to identify photosynthesis-related genes in banana plants and determine their expression profiles under water stress conditions. Banana plantlets were in vitro cultured on Murashige and Skoog agar medium with and without 10% polyethylene glycol and marked as BP10 and BK. Chlorophyll contents in the plant shoots were determined spectrophotometrically. Two cDNA libraries generated from BK and BP10 plantlets, respectively, were used as the reference for transcriptome data. Gene ontology (GO) enrichment analysis was performed using the Database for Annotation, Visualization, and Integrated Discovery (DAVID) and visualized using the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway prediction. Morphological observations indicated that water deficiency caused chlorosis and reduced the shoot chlorophyll content of banana plantlets. GO enrichment identified 52 photosynthesis-related genes that were affected by water stress. KEGG visualization revealed the pathways related to the 52 photosynthesisrelated genes and their allocations in four GO terms. Four, 12, 15, and 21 genes were related to chlorophyll biosynthesis, the Calvin cycle, the photosynthetic electron transfer chain, and the light-harvesting complex, respectively. Differentially expressed gene (DEG) analysis using DESeq revealed that 45 genes were down-regulated, whereas seven genes were up-regulated. Four of the down-regulated genes were responsible for chlorophyll biosynthesis and appeared to cause the decrease in the banana leaf chlorophyll content. Among the annotated DEGs, MaPNDO, MaPSAL, and MaFEDA were selected and validated using quantitative real-time PCR.

  • Research Article 2023-06-13

    0 241 50

    Biomass partitioning and physiological responses of four Moroccan barley varieties subjected to salt stress in a hydroponic system

    Said Bouhraoua ・Mohamed Ferioun ・Srhiouar Nassira ・Abdelali Boussakouran ・Mohamed Akhazzane ・ Douae Belahcen ・Khalil Hammani ・Said Louahlia

    J Plant Biotechnol (2023) 50:115-126


    Abstract : A hydroponics experiment was performed to study the physiological and biochemical changes in Moroccan barley (Hordeum vulgare L.) varieties cultivated under salt stress conditions. Four barley varieties were grown under exposure to three salt concentrations, including 0, 200, and 300 mM NaCl. The ANOVA for both salt stress-sensitive and resistant varieties indicated that salt treatment represented the main source of variability in all studied traits. Salt treatment significantly reduced root and shoot dry weight (RDW and SDW), relative water content (RWC), and chlorophyll content (Chl a, Chl b, and Chl T). However, increases in electrolyte leakage (EL) along with proline and total soluble sugar (TSS) contents were recorded. In addition, large variations in all measured traits were found between varieties. The ‘Massine’ and ‘Laanaceur’ varieties displayed relatively higher RDW and SDW values. The ‘Amira’ and ‘Adrar’ varieties showed lower RWC values and Chl contents than those of the controls indicating their relative sensitivity to salt stress. Principal component analysis revealed that most of the variation was captured by PC1 (72% of the total variance) which grouped samples into three categories according to salt treatment. Correlation analyses highlighted significant associations between most parameters. Positive relationships were found between RDW, SDW, RWC, Chl content, and soluble proteins contents, while a ll of t hese p arameters were n egatively associated with EL intensity, proline content, and TSS content. The results from this study showed that the ‘Massine’ and ‘Laanaceur’ varieties were relatively salt-tolerant. These two salt-tolerant varieties present a good genetic background for breeding of barley varieties showing high salt tolerance.

  • Research Article 2023-06-05

    0 367 63

    Effects of plant preservative mixture™ on in vitro germination of Dendrobium thyrsiflorum Rchb.f. and its application in orchid conservation

    Tran Trung Chanh ・Nguyen Tan Huy ・Nguyen Thu Ha ・Khanh Le ・Nguyen Huu Hoang

    J Plant Biotechnol (2023) 50:108-114


    Abstract : In vitro conservation is one of the most effective strategies for rare plant protection, especially for orchid species. To maximize the success rates of in vitro explant establishment (stage I) in conservation programs, the application of tissue culture additives such as Plant Preservative Mixture™ (PPM™) should be emphasized. In this study, we used Dendrobium thyrsiflorum Rchb.f. (1875) seeds and seedlings as a model for the evaluation of PPM™’s phytotoxicity in the meristematic tissues of epiphytic orchids. PPM™ had no observable inhibitory effect on protocorm, shoot, or root development when it was supplemented at 0.1%. PPM™ supplementation caused adverse effects on D. thyrsiflorum explants at concentrations > 0.2%. At high concentrations, young in vitro seedlings showed damage, especially at the root tissue level. Based on this model, supplementation of 0.1-0.2% PPM™ to culture media was successfully implemented to establish in vitro cultures of other rare orchid species in our conservation program.

  • Research Article 2023-06-01

    0 328 71

    Comparative antiplasmodial activity, cytotoxicity, and phytochemical contents of Warburgia ugandensis stem bark against Aspilia africana wild and in vitro regenerated tissues

    Denis Okello ・Jeremiah Gathirwa ・Alice Wanyoko ・Richard Komakech ・Yuseong Chung ・Roggers Gang ・ Francis Omujal ・Youngmin Kang

    J Plant Biotechnol (2023) 50:097-107


    Abstract : Malaria remains to be one of the most severe global public health concerns. Traditionally, Aspilia africana and Warburgia ugandensis have been used to treat malaria in several African countries for millennia. In the current study, A. africana calli (AaC), A. africana in vitro roots (AaIR), A. africana wild leaf (AaWL), and W. ugandensis stem bark (WuSB) were dried and pulverized. Fourier transform near-infrared spectroscopy was used to analyze the powdered samples, while 80% ethanolic extracts of each sample were assayed for antiplasmodial activity (against Plasmodium falciparum strains DD2 (chloroquine-resistant) and 3D7 (chloroquine-sensitive)) and cytotoxicity. WuSB showed the highest antiplasmodial activity (IC50 = 1.57 ± 0.210 μg/ml and 8.92 ± 0.365 μg/ml against P. falciparum 3D7 and DD2, respectively) and selectivity indices (43.90 ± 7.914 and 7.543 ± 0.051 for P. falciparum 3D7 and DD2, respectively). The highest total polyphenolic contents (total phenolic and flavonoid contents of 367.9 ± 3.55 mg GAE/g and 203.9 ± 1.43 mg RUE/g, respectively) were recorded for WuSB and the lowest were recorded for AaC. The antiplasmodial activities of the tested plant tissues correlated positively with total polyphenolic content. The high selectivity indices of WuSB justify its traditional applications in treating malaria and present it as a good candidate for discovering new antimalarial compounds. We recommend elicitation treatment for AaIR, which showed moderate antiplasmodial activity against P. falciparum DD2, to increase its secondary metabolite production for optimal antimalarial activity.

  • Research Article 2023-05-17

    0 207 39

    Effect of carbon sources on somatic embryogenesis and cotyledon number variations in carrot (Daucus carota L.)

    Young Jin Lee ・Kyu Seog Hwang ・Pil Son Choi

    J Plant Biotechnol (2023) 50:089-095


    Abstract : In order to investigate the effect of carbon sources on somatic embryogenesis and cotyledon number variations in carrot, embryogenic callus were cultured in the medium supplemented with various concentrations of sucrose or glucose, and with combination of 2% sucrose and various concentrations of mannitol or sorbitol. The maximum number of somatic embryos formed per flask (1,555.70) was obtained in the medium supplemented with 2% sucrose rather than glucose alone or a combination of mannitol or sorbitol and 2% sucrose, and the number of somatic embryos was decreased with the increasing of mannitol or sorbitol concentration. The frequencies of somatic embryos with two cotyledons were 35.14% for sucrose, 19.88% for glucose, 32.55% for mannitol + 2% sucrose, and 38.59% for sorbitol + 2% sucrose, respectively, and the frequencies of abnormal somatic embryos having 3 or more cotyledons were 64.86% for sucrose, 80.12% for glucose, 67.44% for mannitol + 2% sucrose, and 61.41% for sorbitol + 2% sucrose, respectively. Particularly, the frequency of somatic embryos with two cotyledons (59.16%) was the highest in the 2% sucrose medium compared to the frequency of abnormal somatic embryogenesis with three or more cotyledons, and the frequency gradually decreased with increasing concentration of glucose, mannitol or sorbitol. According to these results, it was found that the ratio of abnormal somatic embryo was higher than the normal somatic embryo in carrot, and was shown that somatic embryogenesis and the cotyledon number was affected by the concentrations of sucrose, glucose as carbon source, and mannitol and sorbitol as osmotic agents in culture medium.

  • Research Article 2023-05-15

    0 269 38

    Shoot-tip culture for massive production of radish foundation seeds

    Han Yong Park ・You Kyoung Kim ・Soo Bin Choi ・Sug Youn Mo

    J Plant Biotechnol (2023) 50:082-088


    Abstract : Shoot-tip culture was used to produce clonal plants of radish stock seeds. Using 6-benzyladenine (BA), the largest number of RA2 line multi-shoots were formed with an average of 14.67 shoots on 1.33 μM BA in early seedlings and 11.33 shoots on 1.78 μM BA in juvenile seedlings. The largest number of RA4 line multi-shoots were formed with an average of 11.67 shoots on 2.22 μM BA in early seedlings and 13.67 shoots on 1.33 μM BA in juvenile seedlings. There was little difference in the significance level by BA concentration in both lines. Using Thidiazuron (TDZ), the number of RA2 line multi-shoots increased with increasing TDZ concentration, forming the largest number of multi-shoots in 0.45 μM TDZ (7.0 and 3.0 multi-shoots for early and juvenile seedlings, respectively), but few multi-shoots were formed from TDZ 2.25 and 4.5 μM. RA4 line produced almost no multi-shoots in early seedlings, and 3.7 multi-shoots were produced in 0.23 and 0.45 μM TDZ in juvenile seedlings, but not at higher concentrations. Analysis of the tissue culture seedlings grown by cultivating the generated multi-shoots with Radish Foundation seeds using SSR marker revealed a weak pattern of mutation in the generated tissue culture seedlings, but there was no mutant. In addition, in terms of root roots, both RA2 and RA4 lines generally had the best rooting, number of roots, and degree of root development in 4.9 μM indol-3-butyric acid (IBA).

  • Research Article 2023-05-12

    0 249 36

    Differential responses of peroxidases in sweetpotato suspensioncultured cells to cadmium treatment

    Ju Hwan Kim ・Ki Jung Nam ・Kang-Lok Lee ・Yun-Hee Kim

    J Plant Biotechnol (2023) 50:076-081


    Abstract : As cultured plant cells can grow in high oxidative stress conditions, they form an excellent system to study antioxidant mechanisms and the mass production of antioxidants. Oxidative stress is a major cause of damage in plants exposed to various types of environmental stress, including heavy metals, such as cadmium (Cd). Heavy metal accumulation can interfere with many cell functions and plant growth. To evaluate the contribution of oxidative stress to Cd-induced toxicity, cultured sweetpotato (Ipomoea batatas) cells were treated with increasing concentrations of Cd (0, 10, 25, and 50 μM) and cultured further. Cell growth was significantly inhibited by 25 and 50 μM of Cd, and the total protein content increased with 50 μM of Cd. Additionally, the activity of peroxidase (POD) and ascorbate peroxidase (APX), antioxidant enzymes that remove hydrogen peroxide (a reactive oxygen species), increased in the cells after treatment with 50 μM of Cd. The expression analysis of POD, APX, and peroxiredoxin (PRX) isolated from sweetpotato cultured cells in a previous study revealed the differential expression of POD in response to Cd. In this study, the expression levels of several acidic POD (swpa2, swpa3, and swpa4) and basal POD (swpb1, swpb2, and swpb3) genes were increased in Cd-treated cultured cells. These results indicate that Cd-mediated oxidative stress is closely linked to improved POD-mediated antioxidant defense capacity in sweetpotato suspension-cultured cells.

  • Research Article 2023-05-02

    0 296 57

    Analysis of soyasaponin content and biosynthesis-related gene expression in young pea (Pisum sativum L.) sprouts

    Gang Deok Han ・HanGyeol Lee ・Jae-Hyeok Park ・Young Jae Yun ・Gee Woo Kim・Sangyun Jeong ・ So-Yeon Moon ・Hye-Young Seo ・Young-Cheon Kim・Woo Duck Seo ・Jeong Hwan Lee

    J Plant Biotechnol (2023) 50:070-075


    Abstract : In legumes, soyasaponins, one of triterpenoid saponins, are major components of secondary metabolites with a more diverse array of bioactive chemicals. Although the biosynthetic pathway of soyasaponins has been largely studied in soybean, the study on the soyasaponin contents and biosynthesis-related gene expression in pea (Pisum sativum L.) is poorly understood. Here, we found the accumulation of only soyasaponin Bb component in the sprouts of two Korean domestic pea cultivars (Dachung and Sachul). This pattern was consistent with our observation that increased expression of PsUGT73P2 and PsUGT91H4 genes, but not PsCYP72A69, could be responsible for biosynthesis of only soyasaponin Bb in pea by examining their gene expression. However, gradual accumulation of soyasaponin Bb at developmental stages was not consistent with the expression of PsUGT73P2 and PsUGT91H4, suggesting that the changes of their protein activities may affect the accumulation patterns of soyasaponin Bb. We also revealed that the increased expression levels of PsUGT73P2 and PsUGT91H4 during light to dark transition led to increase of soyasaponin Bb contents. Collectively, our results provided a molecular basis of metabolic engineering for enhancing useful soyasaponin Bb metabolites in Korean domestic pea cultivars.

  • Research Article 2023-04-28

    0 373 71

    Agrobacterium-mediated transformation produces transgenic oilseed rape with a high-yield trait

    Jong Bo Kim

    J Plant Biotechnol (2023) 50:063-069


    Abstract : This study includes the transformation of genes such as ORE7, the increase of gene expression, and the use of the bar gene as a selectable marker that shows herbicide resistance with Agrobacterium tumefaciens using hypocotyls from the oilseed rape “Youngsan” cultivar. To establish an Agrobacterium transformation system for the production of oilseed rape with a high-yield trait, infection time and co-cultivation period with Agrobacterium were tested. Therefore, when hypocotyls from the oilseed rape “Youngsan” cultivar were infected with Agrobacterium for 20 min and co-cultivated for 3 days, approximately 32-36 putatively transformed hypocotyls with shoots including roots survived from 100 inoculated hypocotyls after 4 weeks of transformation on a selection medium containing 20 mg/L of phosphinothricin (PPT) as a selectable agent. Additionally, a PCR assay was performed to confirm the insertion of target genes and showed the presence of the ORE7 gene as a high-yielding trait and the bar gene as a selectable marker. Treatment with 0.5% (v/v) Basta solution as a selectable agent for 6 days with leaves from transformed oilseed rape expressed the bar gene. Therefore, this study can contribute to the development of special oilseed rapes containing agriculturally useful traits such as herbicide resistance, drought tolerance, high yielding traits, and high oleic acid content.

  • Research Article 2023-04-28

    0 284 47

    High-efficiency development of herbicide-resistant transgenic lilies via an Agrobacterium-mediated transformation system

    Jong Bo Kim

    J Plant Biotechnol (2023) 50:056-062


    Abstract : Transgenic lilies have been obtained using Agrobacterium tumefaciens (AGL1) with the plant scale explants, followed by DL-phosphinothricin (PPT) selection. In this study, scales of lily plants cv. “red flame” were transformed with the pCAMBIA3301 vector containing the gus gene as a reporter and the blpR gene as a selectable marker, as well as a gene of interest showing herbicide tolerance, both driven by the CaMV 35S promoter. Using a 20-minute infection time and a 5-day cultivation period, factors that optimized and demonstrated a high transformation efficiency were achieved. With these conditions, approximately 22-27% efficiency was observed for Agrobacterium-mediated transformation in lilies. After transformation with Agrobacterium, scales of lilies were transferred to MS medium without selective agents for 2 weeks. They were then placed on selection MS medium containing 5 mg/L PPT for a month of further selection and then cultured for another 4-8 weeks with a 4-week subculture regime on the same selection medium. PPT-resistant scales with shoots were successfully rooted and regenerated into plantlets after transferring into hormone-free MS medium. Also, most survived putatively transformed plantlets indicated the presence of the blpR gene by PCR analysis and showed a blue color indicating expression of the gus gene. In conclusion, when 100 scales of lily cv. “red flame” are transformed with Agrobacterium, approximately 22-27 transgenic plantlets can be produced following an optimized protocol. Therefore, this protocol can contribute to the lily breeding program in the future.

  • Research Article 2023-04-26

    0 317 53

    Chloroplast genome sequence and PCR-based markers for S. cardiophyllum

    Tae-Ho Park

    J Plant Biotechnol (2023) 50:045-055


    Abstract : The diploid Solanum cardiophyllum, a wild tuberbearing species from Mexico is one of the relatives to potato, S. tuberosum. It has been identified as a source of resistance to crucial pathogens and insects such as Phytophthora infestans, Potato virus Y, Colorado potato beetle, etc. and is widely used for potato breeding. However, the sexual hybridization between S. cardiophyllum and S. tuberosum is limited due to their incompatibility. Therefore, somatic hybridization can introduce beneficial traits from this wild species into the potato. After somatic hybridization, selecting fusion products using molecular markers is essential. In the current study, the chloroplast genome of S. cardiophyllum was sequenced by next-generation sequencing technology and compared with those of other Solanum species to develop S. cardiophyllum-specific markers. The total length of the S. cardiophyllum chloroplast genome was 155,570 bp and its size, gene content, order and orientation were similar to those of the other Solanum species. Phylogenic analysis with 32 other Solanaceae species revealed that S. cardiophyllum was expectedly grouped with other Solanum species and most closely located with S. bulbocastanum. Through detailed comparisons of the chloroplast genome sequences of eight Solanum species, we identified 13 SNPs specific to S. cardiophyllum. Further, four SNP-specific PCR markers were developed for discriminating S. cardiophyllum from other Solanum species. The results obtained in this study would help to explore the evolutionary aspects of Solanum species and accelerate breeding using S. cardiophyllum.

  • Research Article 2023-04-26

    0 186 38

    Development of PCR-based markers for selecting plastid genotypes of Solanum hjertingii

    Tae-Ho Park

    J Plant Biotechnol (2023) 50:034-044


    Abstract : The tetraploid Solanum hjertingii, a wild tuber-bearing species from Mexico is a relative of potato, S. tuberosum. The species has been identified as a potential source of resistance to blackening for potato breeding. It does not exhibit enzymatic browning nor blackspot which are physiological disorders. However, due to their sexual incompatibility, somatic hybridization between S. hjertingii and S. tuberosum must be used to introduce various traits from this wild species into potato. After somatic hybridization, molecular markers are essential for selecting fusion products. In this study, the chloroplast genome of S. hjertingii was sequenced by next-generation sequencing technology and compared with those of other Solanum species to develop specific markers for S. hjertingii. The chloroplast genome has a total sequence length of 155,545 bp, and its size, gene content, order and orientation are similar to those of the other Solanum species. Phylogenic analysis including 15 other Solanaceae species grouped S. hjertingii with S. demissum, S. hougasii, and S. stoloniferum. After detailed comparisons of the chloroplast genome sequence with eight other Solanum species, we identified one InDel and seven SNPs specific to S. hjertingii. Based on these, five PCR-based markers were developed for discriminating S. hjertingii from other Solanum species. The results obtained in this study will aid in exploring the evolutionary aspects of Solanum species and accelerating breeding using S. hjertingii.

  • Research Article 2023-03-29

    0 241 107

    UHPLC/TOFHRMS analysis and anti-inflammatory effect of leaf extracts from Zizyphus jujuba in LPS-stimulated RAW264.7 cells

    Hyun Ji Eo ・Sun-Young Lee ・Gwang Hun Park

    J Plant Biotechnol (2023) 50:027-033


    Abstract : Zizyphus jujube is a plant in the buckthorn family (Rhamnaceae) that has been the subject of research into antibacterial, antifungal and anti-inflammatory properties of its fruit and seed. However, few studies have investigated its leaves. In this study, the anti-inflammatory activity of ZJL (an extract of Z. jujube leaf) was evaluated to verify its potential as an anti-inflammatory agent and SARS-CoV-2 medicine, using nitric oxide (NO) assay, RT-PCR, SDS-PAGE, Western blotting, and UHPLC/TOFHRMS analysis. We found that ZJL suppresed pro-inflammatory mediators such as NO, inducible nitric oxide synthase (iNOS), cyclooxy-genase-2 (COX-2), and tumor necrosis factor α (TNF-α) in lipopolysaccharide (LPS)-induced RAW264.7 cells. ZJL acted by inhibiting NF-KB and MAPK signaling pathway activity. We also confirmed that ZJL contains a phenol compound and flavonoids with anti-inflammatory activity such as trehalose, maleate, epigallocatechin, hyperoside, catechin, 3-O-coumaroylquinic acid, rhoifolin, gossypin, kaempferol 3-neohesperidoside, rutin, myricitrin, guaiaverin, quercitrin, quercetin, ursolic acid, and pheophorbide a. These findings suggest that ZJL may have great potential for the development of anti-inflammatory drugs and vaccines via inhibition of NF‐ĸB and MAPK signaling in LPS-induced RAW264.7 cells.

  • Research Article 2023-03-29

    0 263 139

    Embryogenesis and plant regeneration of Panax ginseng Meyer via anther culture and ploidy assessment using flow cytometry

    Jung-Woo Lee ・Kyong-Hwan Bang ・Dong-Hwi Kim・Jang-Uk Kim ・Young-Chang Kim・Ick-Hyun Jo

    J Plant Biotechnol (2023) 50:019-026


    Abstract : Korean ginseng (Panax ginseng Meyer) is an economically important plant because of it is rich in saponins. It is mainly cultivated in Asia, including Korea and China. Since ginseng requires a long breeding period due to juvenility, homozygote production techniques, such as anther culture, must be urgently established. In the present study, callus induction and embryogenesis through anther culture were observed in P. ginseng. Murashige and Skoog medium was used as the basal medium suitable for callus induction. When the medium was supplemented with 3% sucrose, the callus induction rate was high and the callus size was large. Cold pretreatment did not significantly affect callus induction and embryogenesis. Embryogenesis was the most efficient when the embryo-formation medium was supplemented with 1.0 or 3.0 mg/L 2,4-dichlorophenoxyacetic acid. Cultivar significantly affected anther culture efficiency. Specifically, ‘Cheongseon’ showed the highest embryo-formation efficiency, whereas no embryogenesis occurred in ‘Sunun’. Ploidy assessment revealed the haploid status of the induced calli. Embryos derived from anther culture formed shoots upon transfer to germination medium, although no difference in ploidy was noted between the induced callus and control. Overall, the anther culture conditions established in the present study may contribute to the production of homozygous P. ginseng plants in the future.

  • Research Article 2023-03-27

    0 391 138

    Somatic embryogenesis induction in four cassava landraces in East Java, Indonesia

    Slameto ・Indri Fariroh ・Budi Kriswanto ・Didik Pudji Restanto ・Kacung Hariyono

    J Plant Biotechnol (2023) 50:011-018


    Abstract : Manihot esculenta Crantz, commonly known as cassava, is a staple aliment that is a significant source of revenue for farmers. The embryogenic callus is crucial in the genetic engineering of various crop species, including cassava. Four cultivar cassava landraces from East Java were assessed for their ability to produce friable embryogenic callus (FEC) for protoplast isolation. In this study, four cassava cultivars; (Kaspro, Kuning, Gajah, and Gendruwo); were used to obtain FEC, which involved the culture of immature leaf lobes (ILLs) and apical buds (ABs) media containing MS supplemented with 33 μM picloram and 2 μ M of CuSO4 (M1) or MS supplemented with 50 μM 2,4-D and 2 μM CuSO4 (M2). The highest FEC induction efficiency ranged from 72% to 57%, and the highest FEC number ranged from 4.7 to 3.7 with AB explants in media containing MS + 33 μM pilocram and 2 μM CuSO4 (M1). On the other hand, the efficiency of somatic embryogenesis induction ranged from 67% to 53%, and the number ranged from 4.4 to 3.4. The efficiencies of FEC induction ranged from 48% to 42%, and the number ranged from 3.1 to 2.6 with AB explants in media containing MS + 50 μM 2,4-D and 2 μM CuSO4 (M2); the efficiency of FEC induction ranged from 56% to 50%, and the value ranged from 3.6 to 2.4 with ILL explants. The FEC induction of the Gendruwo cultivar, which was examined using AB and ILL explants, demonstrated the lowest efficiency. Nevertheless, all four cultivars showed the ability to generate FEC, even though their effectiveness differed depending on the explant genotype and the applied media.

  • Research Article 2023-03-16

    0 261 134

    Comparative proteome profiling in the storage root of sweet potato during curing-mediated wound healing

    Ho Yong Shin ·Chang Yoon Ji ·Ho Soo Kim ·Jung-Sung Chung ·Sung Hwan Choi ·Sang-Soo Kwak · Yun-Hee Kim·Jeung Joo Lee

    J Plant Biotechnol (2023) 50:001-010


    Abstract : Sweet potato (Ipomoea batatas L. Lam) is an economically important root crop and a valuable source of nutrients, processed foods, animal feeds, and pigment materials. However, during post-harvest storage, storage roots of sweet potatoes are susceptible to decay caused by various microorganisms and diseases. Post-harvest curing is the most effective means of healing wounds and preventing spoilage by microorganisms during storage. In this study, we aimed to identify proteins involved in the molecular mechanisms related to curing and study proteomic changes during the post-curing storage period. For this purpose, changes in protein spots were analyzed through 2D-electrophoresis after treatment at 33°C (curing) and 15°C (control) for three days, followed by a storage period of eight weeks. As a result, we observed 31 differentially expressed protein spots between curing and control groups, among which 15 were identified. Among the identified proteins, the expression level of ‘alpha-amylase (spot 1)’ increased only after the curing treatment, whereas the expression levels of ‘probable aldo-keto reductase 2-like (spot 3)’ and ‘hypothetical protein CHGG_01724 (spot 4)’ increased in both the curing and control groups. However, the expression level of ‘sporamin A (spot 10)’ decreased in both the curing and control treatments. In the control treatment, the expression level of ‘enolase (spot 14)’ increased, but the expression levels of ‘chain A of actinidin-E-64 complex+ (spot 19)’, ‘ascorbate peroxidase (spot 22)’, and several ‘sporamin proteins (spot 20, 21, 23, 24, 27, 29, 30, and 31)’ decreased. These results are expected to help identify proteins related to the curing process in sweet potato storage roots, understand the mechanisms related to disease resistance during post-harvest storage, and derive candidate genes to develop new varieties with improved low-temperature storage capabilities in the future.

Mar 16, 2023 Vol.50, pp. 1~95

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Plant Biotechnology

pISSN 1229-2818
eISSN 2384-1397
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