作物学报2012，Vol.38Issue(6)：1071-1079,9.DOI:10.3724/SP.J.1006.2012.01071
花后渍水高温交互效应对冬小麦旗叶光合特性及产量的影响
Effect of Interaction of Waterlogging and High Temperature after Anthesis on Photosynthetic Characteristics of Flag Leaf and Yield in Winter Wheat
摘要
Abstract
Waterlogging and high temperature are main stress factors during late growing period of winter wheat (Triticum aesti-vum L.) in Yangtze Valley region of China. To understand the effect of interaction of waterlogging and high temperature on photosynthetic characteristics and grain yield of wheat, we carried out a pot experiment, using the variety of Yannong 19, in continuous growing seasons from 2009 to 2011. At grain-forming (5-8 d after anthesis) and milking (15-18 d after anthesis) stages, waterlogging (1 cm of surface water layer), high temperature (35±2℃ of daytime/25±2℃ of nighttime), and waterlogging + high temperature stresses were imposed to wheat plants, separately. Waterlogging, high temperature, and both stresses showed significantly effects on photosynthetic characteristics of flag leaf and yield reducing photosynthetic rate (Pn), chlorophyll content (SPAD reading), stomatal conductance (Gs), and transpiration rate (Tr); enhancing intercellular CO2 concentration (Ci); and declining grain number per spike, 1000-grain weight, and grain yield. However, in the case, spike number per pot was not affected significantly. Thus, the effects of waterlogging and high temperature on Pn did not result from stomata factor of flag leaf. The average relative injury rates (RIR) of yield were 37.7% for waterlogging + high temperature treatment, 21.1% for waterlogging treatment, and 17.6% for high temperature treatment. Stress showed higher RIR at grain forming stage (30.8%) than at milking stage (20.1%). There was significant interaction between waterlogging and high temperature, and grain-forming stage was more sensitive to the interaction than milking stage.关键词
冬小麦/渍水/高温/渍水高温交互效应/光合特性/产量Key words
Winter wheat/ Waterlogging/ High temperature/ Interaction/ Photosynthetic characteristics/ Grain yield引用本文复制引用
吴进东,李金才,魏凤珍,王成雨,张一,武文明..花后渍水高温交互效应对冬小麦旗叶光合特性及产量的影响[J].作物学报,2012,38(6):1071-1079,9.基金项目
本研究由国家自然科学基金项目(31071356),安徽省教育厅自然科学基金重点项目(KJ2011A271)和国家公益性行业(农业)科研专项(201203079,201203100)资助. （31071356）
