RdreB1BI enhances drought tolerance by activating AQP-related genes in transgenic strawberry
文献类型: 外文期刊
作者: Gu, Xianbin 1 ; Gao, Zhihong 1 ; Yan, Yichao 1 ; Wang, Xiuyun 3 ; Qiao, Yushan 1 ; Chen, Yahua 2 ;
作者机构: 1.Nanjing Agr Univ, Coll Hort, 1 Weigang, Nanjing 210095, Jiangsu, Peoples R China
2.Nanjing Agr Univ, Coll Life Sci, 1 Weigang, Nanjing 210095, Jiangsu, Peoples R China
3.Nanjing Agr Univ, Coll Agrograssland Sci, Nanjing 210095, Jiangsu, Peoples R China
4.Zhejiang Acad Agr Sci, Inst Hort, Hangzhou 310021, Zhejiang, Peoples R China
关键词: Drought stress;PIPs;RdreB1BI;Strawberry
期刊名称:PLANT PHYSIOLOGY AND BIOCHEMISTRY ( 影响因子:4.27; 五年影响因子:4.816 )
ISSN: 0981-9428
年卷期: 2017 年 119 卷
页码:
收录情况: SCI
摘要: The dehydration-responsive element binding protein (DREB) family of transcription factors is associated with abiotic stress responses during plant growth and development. This study focussed on the subfamily member DREB1B, which was initially described as highly and specifically responsive to low temperature. However, here it is shown that DREB1B is not only involved in cold tolerance but also other abiotic stress tolerances, such as that of drought. To further understand the genetic improvement effects of the drought tolerance provided by RdreB1BI in transgenic strawberry, drought stress responses of transgenic plants were evaluated at the morphological, physiological, and transcriptional levels. Trans activation assays revealed that RdreB1BI could activate the FvPIP2;1 like 1 promoter. RdreB1BI transgenic plants showed enhanced drought tolerance on the basis of lower rates of electrolyte leakage (EL), higher relative water content (RWC), and less stomatal aperture as well as increased peroxidase (POD) and superoxide dismutase (SOD) activities and less malondialdehyde (MDA) accumulation. The transgenic plants also accumulated higher levels of drought-related regulatory genes and functional gene transcripts, including those of PIP, NAC, RD22, ABI, and NCED. Together, these results demonstrate that RdreB1BI plays an essential role in the regulation of the drought stress response. DREB1B transcription constitutes a useful strategy to exploit in transgenic plants for coping with abiotic stresses, at least cold and drought stresses. The approach may be helpful for genetic engineering horticultural plants to have increased environmental adaptations. (C) 2017 Elsevier Masson SAS. All rights reserved.
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