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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Plant Biotechnology
Journal Basic Information
Journal DOI :
The Korean Society of Plant Biotechnology
Editor in Chief :
Volume & Issues
Volume 41, Issue 4 - Dec 2014
Volume 41, Issue 3 - Sep 2014
Volume 41, Issue 2 - Jun 2014
Volume 41, Issue 1 - Mar 2014
Selecting the target year
Potato breeding via protoplast fusion
Cho, Kwang-Soo ; Park, Tae-Ho ;
Journal of Plant Biotechnology, volume 41, issue 2, 2014, Pages 65~72
DOI : 10.5010/JPB.2014.41.2.65
Plant cells from which the cell walls have been enzymatically or mechanically removed are called protoplasts. The protoplasts are theoretically totipotent and can be used as sources of somatic cell fusion in practical breeding programs. Wild Solanum species have often been used as sources of important agricultural traits including diverse disease resistance. However, they cannot often be directly applied to breeding programs due to their sexual incompatibility with S. tuberosum. Somatic hybridization via protoplast fusion is one of the ideal methods to overcome this limitation and to introgress certain traits into S. tuberosum. This technique has still widely been used in potato since the first fusion was reported in 1970s. Therefore, this review highlights general perspectives of protoplast fusion and discusses the application of protoplast fusion in potato breeding.
Effects of nitric oxide on ascorbate-glutathione cycle enzymes activities in chinese cabbage leaves under paraquat-induced oxidative stress
Na, Ho-Gyun ; Jin, Chang-Duck ;
Journal of Plant Biotechnology, volume 41, issue 2, 2014, Pages 73~80
DOI : 10.5010/JPB.2014.41.2.73
Pretreatment of chinese cabbage leaves with
sodium nitroprusside (SNP), a nitric oxide (NO) donor, effectively improved their tolerance to subsequent
paraquat (PQ)-induced oxidative damage. The fresh weight, and chlorophyll and protein contents in primary leaves treated with PQ alone were noticeably reduced over 24 h light incubation. However, these leaf injury symptoms were significantly alleviated with
SNP pretreatment for 3 h prior to PQ exposure. In additions, the increase of the contents of malondialdehyde (MDA) and
due to PQ exposure were significantly inhibited by SNP pretreatment. Together with the protective effects of SNP against PQ toxicity in leaves, the changes of ascorbate-glutathione cycle enzymes activities were examined. In the PQ alone treatment, the activities of APX, DHAR, and GR after 6 h incubation were rapidly reduced and showed 19%, 50% and 39% respectively, compared with those of the control. However, the decreases in these enzyme activities were significantly inhibited by SNP pretreatment. As a result, their activities were higher than those of PQ alone treatment by 5 times, 2 times, and 1.5 times, respectively, at 6 h incubation. Thereafter, these enzymes decrease their activities gradually showing high levels than those of PQ alone. Based on the above results, it can be assumed that the activation of ascorbate-glutathione cycle by SNP pretreatment in chinese cabbage leaves exposed to PQ can prevent
accumulation, thereby leading to protection against PQ-induced oxidative stress. Also, these results indicate that NO acts as an protectant against PQ stress in the leaves of chinese cabbage.
Screening of salt-tolerance plants using transgenic Arabidopsis that express a salt cress cDNA library
Baek, Dongwon ; Choi, Wonkyun ; Kang, Songhwa ; Shin, Gilok ; Park, Su Jung ; Kim, Chanmin ; Park, Hyeong Cheol ; Yun, Dae-Jin ;
Journal of Plant Biotechnology, volume 41, issue 2, 2014, Pages 81~88
DOI : 10.5010/JPB.2014.41.2.81
Salt cress (Thellungiella halophila or Thellungiella parvula), species closely related to Arabidopsis thaliana, represents an extremophile adapted to harsh saline environments. To isolate salt-tolerance genes from this species, we constructed a cDNA library from roots and leaves of salt cress plants treated with 200 mM NaCl. This cDNA library was subsequently shuttled into the destination binary vector [driven by the cauliflower mosaic virus (CaMV) 35S promoter] designed for plant transformation and expression via recombination- assisted cloning. In total, 305,400 pools of transgenic BASTA-resistant lines were generated in Arabidopsis using either T. halophila or T. parvula cDNA libraries. These were used for functional screening of genes involved in salt tolerance. Among these pools, 168,500 pools were used for primary screening to date from which 7,157 lines showed apparent salt tolerant-phenotypes in the initial screen. A secondary screen has now identified 165 salt tolerant transgenic lines using 1,551 (10.6%) lines that emerged in the first screen. The prevalent phenotype in these lines includes accelerated seed germination often accompanied by faster root growth compared to WT Arabidopsis under salt stress condition. In addition, other lines showed non-typical development of stems and flowers compared to WT Arabidopsis. Based on the close relationship of the tolerant species to the target species we suggest this approach as an appropriate method for the large-scale identification of salt tolerance genes from salt cress.
New embryogenesis from atypical bodies and plant regeneration from long-term subcultured embryogenic callus in rose
Lee, Su Young ; Do, Kyoung Ran ; Cheon, Kyeong-Seong ; Kim, Won Hee ; Kwon, O Hyeon ; Lee, Hye Jin ;
Journal of Plant Biotechnology, volume 41, issue 2, 2014, Pages 89~93
DOI : 10.5010/JPB.2014.41.2.89
Long-term subcultured rose embryogenic calluses, which had been maintained for more than 5 to 6 years since the first embryogenesis from calluses induced from in vitro roots of rose, were identified as potential material for the development of transgenic plants. The first embryogenic calluses from `Sweet Yellow` and two breeding lines (KR056002 and KR056006) were obtained in 2007 and 2009, respectively. Subsequently, we found that plants regenerated from long-term embryogenic calluses (LEC). Whereas the LEC from `Sweet Yellow` takes 3 to 4 months to regenerate plants, those of the two breeding lines take 4 to 5 months. This period of time is the same as that taken for plants to regenerate from the first embryogenic callus. New embryogenesis was observed from atypical bodies (ABs) that appeared during the process of long-term subculture. We found that it is possible to use the AB as a material for new embryogenesis.
Effect of LEDs on shoot multiplication and rooting of rare plant Abeliophyllum distichum Nakai
Lee, Na Nyum ; Choi, Yong Eui ; Moon, Heung Kyu ;
Journal of Plant Biotechnology, volume 41, issue 2, 2014, Pages 94~99
DOI : 10.5010/JPB.2014.41.2.94
This study was conducted to elucidate the effect of light sources and explant types on in vitro shoot multiplication and rooting of a rare and endangered plant Abeliophyllum distichum. Both apical buds and axillary buds were used as explants under 4 different light sources, cool white florescent light (F), 100% blue light-emitting diode (LED) (B), 50% blue and 50% red LED mixture (BR), and 100% red LED (R). Clear difference was observed in terms of shoot proliferation by light sources types but not by position-dependent explant types. Multiple shoot induction rates were enhanced under both B and BR light sources. Spontaneous rooting was induced in shoot induction medium under B light source. Both the rates of rooting and numbers of roots per explant were higher in apical bud explants compared to axillary bud explants. Interestingly R light source stimulated shoot elongation but inhibited root development. Therefore, our results suggest that the use of apical bud explants under B or BR light sources is suitable for in vitro micropropagation of a rare and endangered plant species, Abeliophyllum distichum.
Micropropagation of a rare plant species, Astragalus membranaceus Bunge var. alpinus N.
Han, Mu Seok ; Noh, Seol Ah ; Kwak, Myung Cheol ; Moon, Heung Kyu ;
Journal of Plant Biotechnology, volume 41, issue 2, 2014, Pages 100~106
DOI : 10.5010/JPB.2014.41.2.100
In order to develop an efficient in vitro micropropagation technique for a rare plant species, Astragalus membranaceus Bunge var. alpinus N., shoot proliferation and in vitro or in vivo rootings were conducted and hyperhydrated leaf generated from cultures was histologically observed. During shoot induction, no distinct effect on multiple shoot induction was found between BA and kinetin treatment. BA enhanced the number of internodes, whereas kinetin stimulated shoot elongation. Hyperhydrated leaf composed of bigger cells and retarded palisade parenchyma and showed irregular cell arrangement compared to normal leaf. Especially starch content in hyperhydrated leaf was significantly reduced. The best rooting rate was achieved by B5 medium among three different medium (B5, MS and WPM) and 0.1mg/L IBA treatment induced the highest rooting ratio (80%). No statistical difference was induced by explant types (apical bud or axillary bud) in terms of rooting ratio. In vivo cutting induced rooting rate up to 65% by 0.5% IBA/Talc powder treatment. Although in vivo rooting rate was less efficient compared to in vitro rooting, better survival rate was observed after soil acclimatization. Present study suggested that above micropropagation techniques can be used for rapid multiplication as well as in vitro or in vivo conservation of the species.