棉 花 学 报     Cotton Science   2008，20(2)：128-132

Characteristics of Photosynthetic Production in Bt Transgenic Cotton Leaves
WANG Yong-hui，YANG Zhao-hua，ZHANG Xiang，ZHANG Li，WANG Shu-hong，WANG Jin-you，CHEN De-hua^*
(The Key Opening Lab of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China)

Abstract：The growth and development and photosynthetic production characteristics of Bacillus thuringiensis (Bt) transgenic cotton cultivars in transplanting pattern under high fertility, during the 2003 and 2004 growing seasons at the Yangzhou University Farm, Yangzhou of Jiangsu Province, China. The results showed that Bt transgenic hybrid cotton (CCRI 29, Lumian 15 and Kemian 3) had higher contents of chlorophyll, soluble sugar, higher net photosynthetic rate, reproductive organs dry matter weight, and greater intensity for boll setting, enzyme activity of Sucroase from peak square to peak boll period. They had strong photosynthetic production in whole period. The cultivars of GK 19 and GK 99088 had higher contents of chlorophyll, soluble sugar, higher net photosynthetic rate before peak flower period; the cultivars (Kemian 4 and Lumian 22) had higher contents of chlorophyll, soluble sugar, higher net photosynthetic rate after peak flower period; the cultivars of sGK 321 and Lumian 16 had lower contents of chlorophyll, lower net photosynthetic rate in whole period. There were significant correlation between Sucroase activity and reproductive organs dry matter weight, boll-setting intensity, respectively (r=0.9482^**，r＝0.8699^**). These results suggested that appropriate cultivating measures should be adopted concerning with different photosynthetic production characteristics of Bt cotton cultivars, which contributed to bolster the expression of photosynthetic production and improve yield.
Keywords：Bt cotton; photosynthetic production; photosynthetic characteristics   [Full Text,2158KB]