水利水电技术（中英文）2022，Vol.53Issue(6)：44-55,12.DOI:10.13928/j.cnki.wrahe.2022.06.004
水分胁迫对干旱锻炼后水稻抗旱涝能力的影响及其生理机制
Effect of water stress on drought and submergence resistance and its physiological mechanism of rice after drought hardening
摘要
Abstract
Water stress can affect rice yield and its growth.To enhance the adaptability of rice to adversity and examine the associ-ated physiological mechanisms,experiments focused on investigating the effects of drought exercise at the tillering stage on the for-mation of rice yield per plant and physiological adaptation to subsequent drought or submergence at the jointing-booting stage were performed.The results showed that the rice yield per plant of drought exercise treatment at the tillering stage combined with joint-ing-booting stage drought exercise treatment(D+D)was increased by 10.92％compared with that of the rice yield per plant of no drought exercise treatment at the tillering stage combined with jointing-booting stage drought exercise treatment(ND+D)without significant difference.The rice yield per plant of drought exercise treatment at the tillering stage combined with jointing-booting stage submergence treatment(D+S)was also increased by 19.91％compared with that of the rice yield per plant of no drought ex-ercise at the tillering stage combined with jointing-booting stage submergence treatment(ND+S)without a significant difference.The net photosynthetic and transpiration rates of the rice plants of the D+S treatments were increased by 10.6％and 26.69％,com-pared with the ND+S treatments,respectively.The ratio of variable fluorescence to the maximum fluorescence(Fv/Fm)of the rice plants with the ND+D treatment was less significant and decreased by 3.67％compared with the D+D treatment,the soluble sugar content of D+D treatment was decreased by 9.36％compared with ND+D treatment without any significant difference,and the solu-ble sugar content of the D+S treatment was 21.41％higher than the ND+S treatment.The subjection to drought exercise at the tille-ring stage along with subsequent drought and submergence treatments at the jointing-booting stage increased the activities of superox-ide dismutase(SOD),peroxidase(POD),catalase(CAT),and total antioxidant capacity while decreased malondialdehyde(MDA)and H202 contents for the rice plants to protect themselves from injury.Therefore,the study demonstrated that the drought exercise at the tillering stage was helpful for the rice plants in forming the tolerance to water stress at subsequent jointing-booting stage,and the results can provide guidance for the rice production practices in drought or flood disasters.关键词
分蘖期/干旱/淹涝处理/产量/生理机制/水分胁迫/蒸腾/洪涝Key words
tillering stage/drought exercise/flooding treatment/rice yield/physiological mechanism/water stress/transpiration/flood分类
农业科技引用本文复制引用
时红,熊强强,才硕,张铭,孙占学..水分胁迫对干旱锻炼后水稻抗旱涝能力的影响及其生理机制[J].水利水电技术（中英文）,2022,53(6):44-55,12.基金项目
National Natural Science Foundation of China(31960377) （31960377）
Projects of Water Science and Technology of Jiangxi Province(202124ZDKT29,202123BZKT04,202123BZKT05,201820YBKT24,KT201630)国家自然科学基金项目(31960377) （202124ZDKT29,202123BZKT04,202123BZKT05,201820YBKT24,KT201630）
江西水利科技项目(202124ZDKT29,202123BZKT04,202123BZKT05,201820YBKT24,KT201630) （202124ZDKT29,202123BZKT04,202123BZKT05,201820YBKT24,KT201630）
