Research on Phyto-hormones Regulating Mechanism of the Senescence of Wheat Leaves

doi:10.3321/j.issn:1000-7091.2000.02.012

Abstract

Abstract: Contents of five kinds of phytohormones in different leaves were tested during filling period. The results showed that the contents of ethylene and ABA in the senescing leaves increased obviously, the contents of Z+ZR and GA₃ in the effective leaves also gothigher during the initial and middle filling periods, but the flag leaf showed complex. Therefore, the phytohormones can be divided into two parts, one was ABA and ethylene that induced and prompted senesce, and the other parts was GA₃ and Z+ZR that maintained the functional leaves and inhibited senesce. IAA showed double functions that maintained growth in the earlier filling period, and that promoted the senescing period in the later filling period. In addition, flag leaf was very special, perhaps due to its important function.

Key words: Wheat, Phytohormone, Ethylene, IAA, ABA, Z+ZR, GA₃

CLC Number:

S512.101

ZHAO Chunjiang, KANG Shujiang, WANG Jihua, GUO Xiaowei, LI Hongxiang. Research on Phyto-hormones Regulating Mechanism of the Senescence of Wheat Leaves[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2000, 15(2): 53-56. doi: 10.3321/j.issn:1000-7091.2000.02.012.

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