期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 67, 期 18, 页码 5381-5390出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/erw299
关键词
aba1-1; abi1-1; abiotic stress; abscisic acid; acclimation; APX1; heat stress; MBF1c; stomata; stress combination; water deficit
资金
- National Science Foundation [IOS-0639964, IOS-0743954, IOS-0820188, IOS-1353886]
- University of North Texas College of Arts and Sciences
- Universitat Jaume I of Castellon [E-2015-05]
- Ministerio de Economia y Competitividad (Spain) [AGL2013-42038R]
ABA is required for plant acclimation to a combination of water deficit and heat stress regulating the accumulation of the key acclimation proteins APX1 and MBF1c.Abscisic acid (ABA) plays a key role in plant acclimation to abiotic stress. Although recent studies suggested that ABA could also be important for plant acclimation to a combination of abiotic stresses, its role in this response is currently unknown. Here we studied the response of mutants impaired in ABA signalling (abi1-1) and biosynthesis (aba1-1) to a combination of water deficit and heat stress. Both mutants displayed reduced growth, biomass, and survival when subjected to stress combination. Focusing on abi1-1, we found that although its stomata had an impaired response to water deficit, remaining significantly more open than wild type, its stomatal aperture was surprisingly reduced when subjected to the stress combination. Stomatal closure during stress combination in abi1-1 was accompanied by higher levels of H2O2 in leaves, suggesting that H2O2 might play a role in this response. In contrast to the almost wild-type stomatal closure phenotype of abi1-1 during stress combination, the accumulation of ascorbate peroxidase 1 and multiprotein bridging factor 1c proteins, required for acclimation to a combination of water deficit and heat stress, was significantly reduced in abi1-1. Our findings reveal a key function for ABA in regulating the accumulation of essential proteins during a combination of water deficit and heat stress.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据