盐相关的MYB1在拟南芥盐胁迫期间协调脱落酸生物合成与信号传导
Salt-Related MYB1 Coordinates Abscisic Acid Biosynthesis and Signaling during Salt Stress in Arabidopsis.
作者信息
Wang Ting, Tohge Takayuki, Ivakov Alexander, Mueller-Roeber Bernd, Fernie Alisdair R, Mutwil Marek, Schippers Jos H M, Persson Staffan
机构信息
Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.).
Max-Planck Institute for Molecular Plant Physiology, 14476 Potsdam, Germany (T.W., T.T., A.I., B.M.-R., A.R.F., M.M., J.H.M.S., S.P.);Molecular Biology, University of Potsdam, 14476 Potsdam, Germany (B.M.-R.);Institute of Biology I, Rheinisch-Westfälische Technische Hochschule Aachen University, 52074 Aachen, Germany (J.H.M.S.); andSchool of Biosciences, University of Melbourne, Parkville, Victoria 3010, Australia (S.P.)
出版信息
Plant Physiol. 2015 Oct;169(2):1027-41. doi: 10.1104/pp.15.00962. Epub 2015 Aug 4.
Abiotic stresses, such as salinity, cause global yield loss of all major crop plants. Factors and mechanisms that can aid in plant breeding for salt stress tolerance are therefore of great importance for food and feed production. Here, we identified a MYB-like transcription factor, Salt-Related MYB1 (SRM1), that negatively affects Arabidopsis (Arabidopsis thaliana) seed germination under saline conditions by regulating the levels of the stress hormone abscisic acid (ABA). Accordingly, several ABA biosynthesis and signaling genes act directly downstream of SRM1, including SALT TOLERANT1/NINE-CIS-EPOXYCAROTENOID DIOXYGENASE3, RESPONSIVE TO DESICCATION26, and Arabidopsis NAC DOMAIN CONTAINING PROTEIN19. Furthermore, SRM1 impacts vegetative growth and leaf shape. We show that SRM1 is an important transcriptional regulator that directly targets ABA biosynthesis and signaling-related genes and therefore may be regarded as an important regulator of ABA-mediated salt stress tolerance.
非生物胁迫，如盐度，会导致所有主要农作物的全球产量损失。因此，有助于培育耐盐胁迫植物的因素和机制对于粮食和饲料生产至关重要。在这里，我们鉴定了一个类MYB转录因子，盐相关MYB1（SRM1），它通过调节胁迫激素脱落酸（ABA）的水平，在盐胁迫条件下对拟南芥种子萌发产生负面影响。相应地，几个ABA生物合成和信号转导基因直接作用于SRM1的下游，包括耐盐1/九顺式环氧类胡萝卜素双加氧酶3、对干燥响应26和拟南芥NAC结构域含蛋白19。此外，SRM1影响营养生长和叶片形状。我们表明，SRM1是一个重要的转录调节因子，直接靶向ABA生物合成和信号转导相关基因，因此可被视为ABA介导的盐胁迫耐受性的重要调节因子。
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