Effect of endogenous hormone on the abscission of cotton buds and bolls
The contents of endogenous hormones and the rates of cotton buds and bolls abscission of Wanan-qingdaling 2,GP75,Peru cotton and Shanbeiyin dwarf cotton under different growth days were studied.The re-sults show that endogenous hormones in cotton buds and bolls were highly correlate with abscission rates,and the interaction among different kinds of endogenous hormones also existed.In addition,the content of cytokinin(ZR),auxin(IAA),jasmonic acid(JA) and abscisic acid(ABA) in cotton buds and bolls were significantly correlated with abscission rates of the cotton buds and bolls.