芝麻对涝害的反应及适应性变异Ⅱ.模拟涝害胁迫下芝麻基因型间的光合生理变化及其对生长调节剂的反应  

Studies on response to waterlogging and adaptive change in sesame ( Sesamum indicum L.) Ⅱ. Effects of waterlogging and growth regulators on physiological characteristics of some sesame genotypes

作　　者：王文泉[1] 郑永战[2] 梅鸿献 张福锁[1] 

机构地区：[1]中国农业大学植物营养系,北京100094 [2]河南省农科院芝麻研究中心,郑州450002

出　　处：《中国油料作物学报》2000年第2期48-52,共5页Chinese Journal of Oil Crop Sciences

基　　金：农业部重点项目! (农 0 1- 0 1- 0 2 )

摘　　要：采用双因素裂区设计 ,研究了 6种芝麻基因型在淹水与非淹水下光合生理指数的相对变化及对生长调节剂的反应。结果表明 ,淹水下 ,净光合速率 ( Pn)、叶绿素含量 ( Chl)显著降低 ,蒸腾速率与气孔阻力无明显差异。基因型间 Pn下降幅度差异大 ,相对值为 0 .65～ 0 .88,以耐渍品种野芝 7号最大 ,非耐渍品种遂平小籽黄最小 ,与相对产量相关系数为 0 .90 91 ,达到显著水平 ,Pn可以作为芝麻耐渍性的生理指标。而 Chl含量下降差异较小 ,相对值为 0 .4 8～ 0 .64 ,以耐渍品种较高 ,与相对产量相关不显著 ,其相关系数为 0 .3 50 2。 3种生长调节剂处理 ,均可使 Pn和Effects of waterlogging and growth regulators on physiological characteristics of 6 sesame genotypes have been subjected by two factor split plot design under artificial flooding condition. It was shown that net photosynthesis (Pn) and chlorophyll content (Chl) were markedly reduced after plants were waterlogging at various stages of growth, but the transpiration rate (Tr) and stomata resistance (Sr) were not. The decreasing of Pn was very different among genotypes, represented by relative value of Pn as 0.65～0.88. The Wild No.7 was the tolerant variety with the highest value, and Suiping Xiaozihuang was the sensitive variety with the least one. The correlation coefficient of relative Pn to relative yield was 0.9091, significantly, that supports Pn could be taken as an index of flooding tolerance. The correlation coefficient of less changeable relative values Chl to relative seed yield was not significant, although the tolerant genotypes hold the higher value. All three growth regulators increased the Pn and Chl of two genotypes under flooding condition.

关 键 词：芝麻 光合生理 生长调节剂 涝害 适应性 

分 类 号：S565.301[农业科学—作物学] S565.303.4