文献类型： 外文期刊

作者： Black, CC ¹ ; Tu, ZP ² ; Counce, PA ² ; Yao, PF ² ; Angelov, MN ² ;

作者机构： 1.GUANGDONG ACAD AGR SCI,CANTON 510640,PEOPLES R CHINA

2.GUANGDONG ACAD AGR SCI,CANTON 510640,PEOPLES R CHINA; UNIV ARKANSAS,DIV AGR,NE RES & EXTENS CTR,KEISER,AR 72351

关键词： photoinhibition;photosynthesis increase;xanthophyll cycle;photosynthesis midday depression;crop yield;rice grain yield;leaf longevity;grain harvest index;light interception;paraquat-induced chlorophyll bleaching;carotenoids

期刊名称：PHOTOSYNTHESIS RESEARCH （ 影响因子：3.573； 五年影响因子：3.674 ）

ISSN： 0166-8595

年卷期： 1995 年 46 卷 1-2 期

页码：

收录情况： SCI

摘要： The hypothesis we propose is that during photosynthesis the balance between potentially detrimental and beneficial photochemically induced events can be tipped beneficially toward increased photosynthesis and toward increased crop yield. To test this hypothesis a procedure has been devised with the rice plant, Oryza sativa, that has resulted in increasing both canopy photosynthesis and rice grain yield. Two elite rice varieties selected independently in the contrasting environments of either South China or Texas, each with distinct photosynthetic traits, were crossed to produce a hybrid with an increased canopy photosynthesis and grain yield that is regularly 20 to 22% higher than the mid-yields of the parents. The photosynthetic traits and mechanisms which may contribute to these beneficial results in the hybrid rice are: a reduction of the midday depression of photosynthesis; a rapid development of the canopy for photosynthetic light interception and an increased canopy photosynthesis; increased amounts of carotenoids for the xanthophyll cycle; an increased protection against free radicals induced by paraquat treatment; a 6 to 12 day shorter plant reproductive life cycle; and a 8 to 10 day increase in the longevity of the flag leaf over the parents. While the hybrid rice has successfully integrated these and likely other unknown characteristics to increase both crop photosynthesis and grain yield, we propose that understanding the underlying beneficial photosynthetic mechanisms supporting these crop plant traits is worthy of thorough investigation and application in crop production.