文献类型：期刊文献

英文题名：Melatonin induces the transcripts of CBF/DREB1s and their involvement in both abiotic and biotic stresses in Arabidopsis

作者：Shi, Haitao[1] Qian, Yongqiang[2] Tan, Dun-Xian[3] Reiter, Russel J.[3] He, Chaozu[1]

第一作者：Shi, Haitao

通信作者：Shi, HT[1]

机构：[1]Hainan Univ, Coll Agr, Hainan Key Lab Sustainable Utilizat Trop Bioresou, Haikou 570228, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing, Peoples R China;[3]Univ Texas Hlth Sci Ctr San Antonio, Dept Cellular & Struct Biol, San Antonio, TX 78229 USA

年份：2015

卷号：59

期号：3

起止页码：334-342

外文期刊名：JOURNAL OF PINEAL RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000361967300005)】；

基金：We thank Prof. Michael Thomashow at Michigan State University for sharing the AtCBF-overexpressing lines. This research was supported by the Department of Science and Technology of Hainan Province (grant No. ZDZX2013023) to Chaozu He, the startup funding of Hainan University (grant No. kyqd1531) to Haitao Shi and by the Basic Research Fund of National Nonprofit Research Institutions (grant No. CAFYBB2012043, RIF2014-03) to Yongqiang Qian.

语种：英文

外文关键词：abiotic and biotic stresses; Arabidopsis; CBF/DREB1s; melatonin; transcription factor

摘要：Melatonin (N-acetyl-5-methoxytryptamine) is a naturally occurring small molecule that acts as an important secondary messenger in plant stress responses. However, the mechanism underlying the melatonin-mediated signaling pathway in plant stress responses has not been established. C-repeat-binding factors (CBFs)/Drought response element Binding 1 factors (DREB1s) encode transcription factors that play important roles in plant stress responses. This study has determined that endogenous melatonin and transcripts level of CBFs (AtCBF1, AtCBF2, and AtCBF3) in Arabidopsis leaves were significantly induced by salt, drought, and cold stresses and by pathogen Pseudomonas syringe pv. tomato (Pst) DC3000 infection. Moreover, both exogenous melatonin treatment and overexpression of CBFs conferred enhanced resistance to both abiotic and biotic stresses in Arabidopsis. Notably, AtCBFs and exogenous melatonin treatment positively regulated the mRNA expression of several stress-responsive genes (COR15A, RD22, and KIN1) and accumulation of soluble sugars content such as sucrose in Arabidopsis under control and stress conditions. Additionally, exogenous sucrose also conferred improved resistance to both abiotic and biotic stresses in Arabidopsis. Taken together, this study indicates that AtCBFs confer enhanced resistance to both abiotic and biotic stresses, and AtCBF-mediated signaling pathway and sugar accumulation may be involved in melatonin-mediated stress response in Arabidopsis, at least partially.