抽穗期高温对水稻叶片光合特性和干物质积累的影响  

Impact of High Temperature at Heading Stage on Rice Photosynthetic Characteristic and Dry Matter Accumulation

作　　者：谢晓金[1] 李秉柏[2] 朱红霞[1] 杨沈斌[1] 申双和[1] 

机构地区：[1]南京信息工程大学江苏省农业气象重点实验室,南京210044 [2]江苏省农业科学院农业资源与环境研究所,南京210014

出　　处：《中国农业气象》2012年第3期457-461,共5页Chinese Journal of Agrometeorology

基　　金：公益性行业科研专项(GYHY201106027);江苏省农业气象重点实验室开放基金(JKLAM201204);江苏高校优势学科建设工程资助项目

摘　　要：以不同温度胁迫下(35℃/3d、35℃/5d、38℃/3d和38℃/5d)的水稻田间试验为基础,研究抽穗期高温胁迫对两个水稻品种扬稻6号和南粳43的干物质积累和分配、叶片绿色度值(Soil and plant analyzer development,SPAD)和净光合速率的影响。结果表明,与常温对照(CK)相比,高温胁迫下,两个水稻品种干物质积累量、SPAD值和净光合速率显著下降(P<0.05),茎鞘物质输出率和转运率显著增加(P<0.05)。随着胁迫温度的升高和胁迫时间的延长,两个水稻品种各指标的变化幅度逐渐增加。不同水稻品种对高温胁迫的反应不同,扬稻6号受高温影响要小于南粳43。Based on field experiments with two rice cultivars,Yangdao 6 and Nanjing 43 under different high temperature stresses（35℃/3d,35℃/5d,38℃/3d and 38℃/5d）at heading stage,authors analyzed the relationships between dry matter accumulation and distribution, soil and plant analyzer development value （ SPAD ） and net photosynthetic rate （NPn）. The results showed that SPAD value, net photosynthetic rate and dry matter accumulation declined gradually, the export percentage of the matter in stem -sheath （EPMSS）and the transformation percentage of the matter in stem -sheath （TPMSS） increased gradually by high temperature stresses compared with CK. With the elevation of stress temperature and extension of stress time,decreasing extent or increasing extent of the above indexes of two rice cuhivars increased sharply. Different rice cuhivars respond differently to high temperature stresses, the ability of high temperature tolerance of Nanjing 43 was lower than that of Yangdao 6.

关 键 词：高温胁迫 扬稻6号 南粳43 光合特性 干物质积累 叶片绿色度值 净光合速率 

分 类 号：S511[农业科学—作物学]