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籽粒蛋白质含量不同的小麦品种间光合速率的比较

董彩霞, 田纪春, 赵世杰

中科院南京土壤研究所.江苏,南京 210008；山东农业大学农学系.山东,泰安 271018；山东农业大学植物科学系.山东,泰安 271018

摘要

相关分析表明,苗期以CO_(2)同化速率表示的光合速率与籽粒蛋白质含量之间呈极显著负相关关系(r=-0.75~(**)),与籽粒产量则达极显著正相关关系(r=0.849~(**));以光合放氧速率表示的光合速率与籽粒蛋白质含量之间呈显著正相关(r=0.515~(*)),而与产量无相关关系(r=0.415)。用CO_(2)同化速率和光合放氧速率对品种所作的聚类分析表明,15个品种被明显分为两个大类,一是光合放氧速率较高而CO_(2)同化速率较低,另一类则相反。蛋白质含量高的品种其CO_(2)同化速率较蛋白质含量低的品种低,但光合放氧速率却不低,甚至高于蛋白质含量低的品种。籽粒形成期间,蛋白质含量高的品种光合CO_(2)同化速率和光合放氧速率下降幅度相对较小,后期衰老较慢,可能与其体内较高的氮素含量和较强的硝酸还原酶活性有关。

关键词： 籽粒蛋白质含量; 产量; 光合CO2同化速率; 光合放氧速率

Comparison of photosynthetic rates of wheat cultivars with different levels of grain protein content

Dong Caixia, Tian Jichun, Zhao Shijie

Institute of Soil Science,Chinese Academy of Sciences.Nanjing 210008,Jiangsu；China

Abstract

Cluster analysis shows that high protein content cultivars mostly had a comparatively low CO_(2) assimilation rates, while photosynthetic rates measured in terms of O_(2) evolution were not lower and, in some of them, were even higher than low protein content cultivars. During grain-filling period, CO_(2) assimilation and O_(2) evolution rates in high protein content cultivars declined more slowly than that in the high yielding cultivars. Such cultivars also senesced slowly, which was probably resulted from their relatively high nitrogen content and nitrate reductase activity inleaves.

Key words: Grain protein content;Grain yield;Photosynthetic CO_(2) assimilation rate;O_(2) evolution rate

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引用本文：

董彩霞, 田纪春, 赵世杰. 籽粒蛋白质含量不同的小麦品种间光合速率的比较[J]. 生理学报 2001; 53 (5): .

Dong Caixia, Tian Jichun, Zhao Shijie. Comparison of photosynthetic rates of wheat cultivars with different levels of grain protein content. Acta Physiol Sin 2001; 53 (5): (in Chinese with English abstract).