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Tomato expressing Arabidopsis glutaredoxin gene AtGRXS17 confers tolerance to chilling stress via modulating cold responsive components

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Horticulture Research 2015年第1期2卷 60-70页

作者： Ying Hu Qingyu Wu Stuart A Sprague jungeun park Myungmin Oh C B Rajashekar Hisashi Koiwa Paul A Nakata Ninghui Cheng Kendal D Hirschi Frank F White Sunghun park Department of Horticulture Forestryand Recreation ResourcesKansas State UniversityManhattan66506KSUSA Department of Horticultural Science Texas A&M UniversityCollege Station77843TXUSA United States Department of Agriculture/Agricultural Research Service Department of PediatricsChildren’s Nutrition Research CenterBaylor College of MedicineHouston77030TXUSA Department of Plant Pathology Kansas State UniversityManhattan66506KSUSA Cold Spring Harbor Laboratory Cold Spring HarborNY 11724USA Present address:Department of Horticultural Science Chungbuk National UniversityCheongju 361-763South Korea Department of Plant Pathology University of FloridaGainesvilleFL 32611USA

Chilling stress is a production constraint of tomato,a tropical origin,chilling-sensitive horticultural *** development of chilling tolerant tomato thus has significant potential to impact tomato ***(GRXs)are ubiquitous oxidoreductases,which utilize the reducing power of glutathione to reduce disulfide bonds of substrate proteins and maintain cellular redox ***,we report that tomato expressing Arabidopsis GRX gene AtGRXS17 conferred tolerance to chilling stress without adverse effects on growth and ***17-expressing tomato plants displayed lower ion leakage,higher maximal photochemical efficiency of photosystem II(Fv/Fm)and increased accumulation of soluble sugar compared with wild-type plants after the chilling stress ***,chilling tolerance was correlated with increased antioxidant enzyme activities and reduced H2O2 *** the same time,temporal expression patterns of the endogenous C-repeat/DRE-binding factor 1(SlCBF1)and CBF mediated-cold regulated genes were not altered in AtGRXS17-expressing plants when compared with wild-type plants,and proline concentrations remained unchanged relative to wild-type plants under chilling *** fluorescent protein-AtGRXS17 fusion proteins,which were initially localized in the cytoplasm,migrated into the nucleus during chilling stress,reflecting a possible role of AtGRXS17 in nuclear signaling of chilling stress ***,our findings demonstrate that genetically engineered tomato plants expressing AtGRXS17 can enhance chilling tolerance and suggest a genetic engineering strategy to improve chilling tolerance without yield penalty across different crop species.

关键词： expressing stress S17

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Whole-genome,transcriptome,and methylome analyses provide insights into the evolution of platycoside biosynthesis in Platycodon grandiflorus,a medicinal plant

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Horticulture Research 2020年第1期7卷 1536-1547页

作者： jungeun Kim Sang-Ho Kang Sin-Gi park Tae-Jin Yang Yi Lee Ok Tae Kim Oksung Chung Jungho Lee Jae-Pil Choi Soo-Jin Kwon Keunpyo Lee Byoung-Ohg Ahn Dong Jin Lee Seung-il Yoo In-Gang Shin Yurry Um Dae Young Lee Geum-Soog Kim Chang Pyo Hong Jong Bhak Chang-Kug Kim Personal Genomics Institute Genome Research FoundationOsong 28160Korea Genomics Division National Institute of Agricultural Sciences(NAS)Jeonju 54874Korea Theragen Etex Bio Institute Suwon 16229Korea Department of Plant Science Plant Genomics and Breeding Instituteand Research Institute of Agriculture and Life SciencesCollege of Agriculture and Life SciencesSeoul National UniversitySeoul 08826Korea Department of Industrial Plant Science&Technology Chungbuk National UniversityCheongju 28644Korea Department of Herbal Crop Research National Institute of Horticultural and Herbal ScienceRural Development Administration(RDA)Eumseong 27709Korea Clinomics Inc Ulsan 44919Korea Green Plant Institute Yongin 16954Korea Korean Genomics Center(KOGIC) Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Biomedical Engineering School of Life SciencesUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea

Triterpenoid saponins(TSs)are common plant defense phytochemicals with potential pharmaceutical *** grandiflorus(Campanulaceae)has been traditionally used to treat bronchitis and asthma in East *** oleanane-type TSs,platycosides,are a major component of the *** root *** studies show that platycosides exhibit anti-inflammatory,antiobesity,anticancer,antiviral,and antiallergy ***,the evolutionary history of platycoside biosynthesis genes remains *** this study,we sequenced the genome of *** and investigated the genes involved in platycoside *** draft genome of *** is 680.1 Mb long and contains 40,017 protein-coding *** analysis revealed that the CYP716 family genes play a major role in platycoside *** CYP716 gene family of *** was much larger than that of other Asterid *** gene annotation also revealed the expansion ofβ-amyrin synthases(bASs)in ***,which was confirmed by tissue-specific gene *** these expanded gene families,we identified key genes showing preferential expression in roots and association with platycoside *** addition,wholegenome bisulfite sequencing showed that CYP716 and bAS genes are hypomethylated in ***,suggesting that epigenetic modification of these two gene families affects platycoside *** whole-genome,transcriptome,and methylome data of *** provide novel insights into the regulation of platycoside biosynthesis by CYP716 and bAS gene families.

关键词： properties insight roots

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