中国水稻科学2016，Vol.30Issue(6)：637-646,10.DOI:10.16819/j.1001-7216.2016.5178
花期高温胁迫对水稻颖花生理特性的影响
Effect of High Temperature Stress on Physiological Characteristics of Spikelet of Rice During Flowering Stage
摘要
Abstract
To ascertain the effect of high temperature stress on the physiological characteristics of rice spikelet at flow-ing stage,wild type Zhonghua 1 1(ZH1 1)and its heat-resistant mutant (hst )were exposed to heat stress (40℃,6 h per day)for 7 days in growth chambers.The results showed that under heat stress the chlorophyll content in flag leaf,sol-uble protein and soluble sugar contents in spikelet of rice decreased obviously with lower decline in the mutant hst com-pared to the wild type ZH1 1 .While malonyldialdehyde (MDA),hydrogen peroxide(H 2 O 2 )and free proline contents in spikelets increased significantly with greater increase in wild type ZH1 1 than in the mutant hst .Superoxide dismutase (SOD),catalase (CAT)and peroxidase(POD)activities showed different responses to high temperature stress,and the correlation between the enzyme activities and the thermal sensitivity would be further investigated.Under high tem-perature stress,higher photosynthesis efficiency,better osmotic adjustment ability as well as lower MDA and H 2 O 2 content of spikelets in the mutant could be the physiological basis of high temperature tolerance.关键词
水稻/抽穗扬花期/高温胁迫/颖花/生理特性Key words
rice/flowering stage/high temperature stress/spikelet/physiological characteristics分类
生物科学引用本文复制引用
兰旭,顾正栋,丁艳菲,王珂,江琼,朱诚..花期高温胁迫对水稻颖花生理特性的影响[J].中国水稻科学,2016,30(6):637-646,10.基金项目
国家自然科学基金资助项目(31401299,31470368,31170251,31101133) （31401299,31470368,31170251,31101133）
浙江省自然科学基金资助项目(LZ14C020001) （LZ14C020001）
