Changes of Endogenous Hormones during Chestnut Embryo Development

In order to improve understanding the inducers of empty shells of chestnut,the authors tested the contents of endogenous hormones.The results showed that: the content of endogenous GA_(1+3) in normal developmental embryos of chestnut kept increasing after bloom and reached a peak value at the 25th day,during which endogenous GA_(1+3) accumulated more rapidly from 10th to 25th day after bloom;the content of endogenous GA_(1+3) in empty shell embryos did not increased obviously.The content of endogenous iPAs in normal developmental embryos kept up and reached the peak on the 25th day after bloom,but in the empty shell embryos, the iPAs content slowly decreased after bloom,followed by a dramatic decrease from the 15th day.So the accumulation of iPAs and GA_(1+3) and the decrease of endogenous ABA were beneficial to the normal development of chestnut.