文摘
Bacillus thuringiensis (Bt) transgenic cotton has shown changes in vegetative and reproductive growth characteristics. The objective of this study was to investigate the physiological changes in nitrogen metabolism that related closely to growth in Bt cotton cultivars. The study was undertaken on two Bt transgenic cotton cultivars and their parents, one conventional (Xingyang 822) and recurrent parent (Sumian No. 9), the other a hybrid (Kumian No. 1) and female parent (Yumian No. 1), during the 2001 and 2002 growing seasons at the Yangzhou University Farm, Yangzhou, China.