Comparison of Dynamics and Functions of Endogenous IAA, CTK Content among Main Crops of Gramineae at Early Growing Stage

doi:10.3321/j.issn:1000-7091.2004.04.013

Abstract

Abstract: Research on the relationship between endogenous hormones and tiller activity of main crops of Gramineae was done over two seasons( 1999-2001). The results were as following: The same changes of en- dogenous IAA and CTK contents rose early and then droped, were presented in the tiller process of winter wheat and rice at the early growing stage of maize. Yet, the value of IAA/ CTK descended at the early stage of tiller process, and then ascended at the late stage. At the same time, the number of weekly tiller increment per plant rose quickly early, and then drop late. So, wheat and rice tiller activity was noticeably regulated by the content of IAA and CTK, especially the value of IAA/ CT K. It could be improved or inhibited by a low or high value of IAA/ CTK respectively. It was also found that the dynamic of IAA/ CTK played a rather important role in the early growing stage of maize.

Key words: Gramineae, Main crops, Tiller, IAA, CTK

CLC Number:

S512.101

SHANG Yu-lei, LI Chun-xi, SHAO Yun, JIANG Li-na. Comparison of Dynamics and Functions of Endogenous IAA, CTK Content among Main Crops of Gramineae at Early Growing Stage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2004, 19(4): 47-50. doi: 10.3321/j.issn:1000-7091.2004.04.013.

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