Physiological, proteomic and transcriptional responses of wheat to combination of drought or waterlogging with late spring low temperature

被引:44
作者
Li, Xiangnan [1 ]
Cai, Jian [1 ]
Liu, Fulai [2 ]
Dai, Tingbo [1 ]
Cao, Weixing [1 ]
Jiang, Dong [1 ]
机构
[1] Nanjing Agr Univ, Minist Agr, Natl Engn & Technol Ctr Informat Agr, Key Lab Crop Physiol & Ecol Southern China, Nanjing 210095, Jiangsu, Peoples R China
[2] Univ Copenhagen, Fac Sci, Dept Plant & Environm Sci, DK-2630 Taastrup, Denmark
基金
中国国家自然科学基金;
关键词
low temperature; proteome; Triticum aestivum; WINTER-WHEAT; OXIDATIVE STRESS; STOMATAL CONDUCTANCE; ANTIOXIDANT SYSTEM; COLD-ACCLIMATION; RUBISCO ACTIVITY; GENE-EXPRESSION; ABIOTIC STRESS; GRAIN-YIELD; PHOTOSYNTHESIS;
D O I
10.1071/FP13306
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Spring low temperature events affect winter wheat (Triticum aestivum L.) during late vegetative or reproductive development, exposing plants to a subzero low temperature stress when winter hardening is lost. The increased climatic variability results in wheat being exposed to more frequent adverse impacts of combined low temperature and water stress, including drought and waterlogging. The responses of potted wheat plants cultivated in climatic chambers to these environmental perturbations were investigated at physiological, proteomic and transcriptional levels. At the physiological level, the depressed carbon (C) assimilation induced by the combined stresses was due mainly to stomatal closure and damage of photosynthetic electron transport. Biochemically, the adaptive effects of early moderate drought or waterlogging stress were associated with the activation of antioxidant enzyme system in chloroplasts and mitochondria of leaf under low temperature. Further proteomic analysis revealed that the oxidative stress defence, C metabolism and photosynthesis related proteins were modulated by the combined low temperature and water stress. Collectively, the results indicate that impairment of photosynthesis and C metabolism was responsible for the grain yield loss in winter wheat under low temperature in combination with severe drought or waterlogging stress. In addition, prior mild drought or waterlogging contributed to the homeostasis of oxidative metabolism and relatively better photosynthesis, and hence to less grain yield loss under later spring low temperature stress.
引用
收藏
页码:690 / 703
页数:14
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