摘要
以两个不同产量性状的水稻品种（ＯｒｙｚａｓａｔｉｖａＬ．ｉｎｄｉｃａ）为材料，研究高产水稻品种的高光合机理。结果表明：在剑叶生育过程中，高产水稻品种浙农９５２的光合速率始终高于浙农９６６；Ｒｕｂｉｓｃｏ初始活力、总活力、Ｒｕｂｉｓｃｏ含量和光合速率均显著相关；除最大值外，浙农９５２的Ｒｕｂｉｓｃｏ的初始活力、总活力均高于浙农９６６；但浙农９５２的Ｒｕｂｉｓｃｏ含量在剑叶发育前期明显低于浙农９６６，后期则因浙农９５２降幅较慢而高于浙农９６６。因此推测品种间Ｒｕｂｉｓｃｏ确实存在着差异；Ｒｕｂｉｓｃｏ含量并非为光合速率的唯一限制因子，而是与Ｒｕｂｉｓｃｏ活力共同限制着光合速度，进而影响水稻产量。
The
photosynthetic characteristics were compared between two cultivars,Zhenong 952a high
yielding cultivar,and Zhenong 966a low yielding cultivar.By estimating the dynamic changes of
photosynthetic rate,Rubisco activity and content in flag leaf after the flag leaf emergence,it
showed that all of those attained its maximum during the flowering stage and began to
decrease during senesence;And the photosynthetic rates correlated with initial Rubisco activity,
total Rubisco activity and Rubisco content in both cultivars,respectively;But both Rubisco initial
activity and total activity in Zhenong 952 were higher than those in Zhenong 966 except their
maximun,and the Rubisco content was lower in Zhenong 952 than that in Zhenong 966 at earlier
stage after flag leaf emergence.These results indicated that the photosynthetic rate was limited
by both of Rubisco content and activity.
出处
《浙江农业学报》
CSCD
1999年第3期114-118,共5页
Acta Agriculturae Zhejiangensis
基金
国家自然科学基金
