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bHLH92 from sheepgrass acts as a negative regulator of anthocyanin/proanthocyandin accumulation and influences seed dormancy
Zhao, Pincang1; Li, Xiaoxia; Jia, Junting; Yuan, Guangxiao; Chen, Shuangyan; Qi, Dongmei; Cheng, Liqin; Liu, Gongshe
2019
发表期刊JOURNAL OF EXPERIMENTAL BOTANY
ISSN0022-0957
卷号70期号:1页码:269-284
摘要Sheepgrass (Leymus chinensis) is an important native forage grass, and it is widely grown in north China. Differential dormancy exists in sheepgrass germplasms with different seed colors. To decipher and find potential genes underlying this phenomenon, we compared the transcript profiles of yellow seeds with weak dormancy and brown seeds with strong dormancy. We identified a transcription factor gene LcbHLH92 which is negatively correlated with those of anthocyanin/proanthocyanidin-specific pathway genes, anthocyanidin synthase (ANS) and anthocyanidin reductase (ANR). LcbHLH92 had two transcripts, LcbHLH92a and LcbHLH92b, and their expression could be induced by abscisic acid, cold, and NaCI. Overexpression of LcbHLH92a or LcbHLH92b in Arabidopsis significantly inhibited the transcript levels of dihydroflavonol reductase (DFR) and ANS genes in leaves and seeds, which resulted in a decrease in anthocyanins and proanthocyanidins, respectively. Importantly, transgenic Arabidopsis seeds with a yellow color showed a higher germination rate than did the wild-type with a brown seed color. Moreover, LcbHLH92a and LcbHLH92b repressed the transcription of Transparent Testa8, ANS, DFR, and ANR, possibly by elevating the transcript levels of jasmonate-ZIM domain proteins through binding to their promoters. Together, our results demonstrate that LcbHLH92a and LcbHLH92b are negative regulators of the anthocyanin/proanthocyanidin pathway and influence seed dormancy.
关键词LcbHLH92 Leymus chinensis proanthocyanidins seed color seed dormancy
学科领域Plant Sciences
DOI10.1093/jxb/ery335
收录类别SCI
语种英语
WOS关键词MYB DOMAIN PROTEIN ; COLOR GENE R ; FLAVONOID BIOSYNTHESIS ; ABSCISIC-ACID ; PROANTHOCYANIDIN BIOSYNTHESIS ; ANTHOCYANIN BIOSYNTHESIS ; TEMPERATURE REGULATION ; STRESS TOLERANCE ; GRAIN DORMANCY ; ARABIDOPSIS
WOS研究方向Plant Sciences
WOS记录号WOS:000459348500022
出版者OXFORD UNIV PRESS
文献子类Article
出版地OXFORD
EISSN1460-2431
资助机构National Basic Research Program of China ('973' program)National Basic Research Program of China [2014CB138704] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31601996, 31170316] ; Project of Science and Technology Service Network Initiative of the Chinese Academy of Sciences (STS) [KFJ-EW-STS-119] ; Conservation of Species Resources of the Ministry of Agriculture of China [2130135] ; Agricultural Technical Experiment and Demonstration of the Ministry of Agriculture of China [13162130106232052]
作者邮箱lqcheng@ibcas.ac.cn ; liugs@ibcas.ac.cn
作品OA属性hybrid, Green Published
引用统计
被引频次:40[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/19877
专题中科院北方资源植物重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing, Peoples R China
2.Hebei Univ Econ & Business, Coll Management Sci & Engn, Shijiazhuang, Hebei, Peoples R China
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GB/T 7714
Zhao, Pincang,Li, Xiaoxia,Jia, Junting,et al. bHLH92 from sheepgrass acts as a negative regulator of anthocyanin/proanthocyandin accumulation and influences seed dormancy[J]. JOURNAL OF EXPERIMENTAL BOTANY,2019,70(1):269-284.
APA Zhao, Pincang.,Li, Xiaoxia.,Jia, Junting.,Yuan, Guangxiao.,Chen, Shuangyan.,...&Liu, Gongshe.(2019).bHLH92 from sheepgrass acts as a negative regulator of anthocyanin/proanthocyandin accumulation and influences seed dormancy.JOURNAL OF EXPERIMENTAL BOTANY,70(1),269-284.
MLA Zhao, Pincang,et al."bHLH92 from sheepgrass acts as a negative regulator of anthocyanin/proanthocyandin accumulation and influences seed dormancy".JOURNAL OF EXPERIMENTAL BOTANY 70.1(2019):269-284.
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