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Changes of plant hormones in the abscission of soybean reproductive organ

Li Xiuju, Meng Fanjing

College of Biological Sciences,China Agricultural University.Beijing 100094

Abstract

Racemes on node 8 to node 12 were taken at full bloom. On the upper (distal), middle and basal (proximal) parts of the raceme, the abscission rates of flowers and pods were 77.4%, 54.7% and 18.3% respectively at stage R4. In early growing period, the concentrations of cytokinins (iPA, ZRs and DHZRs) in basal pods were significantly higher while that of abscisic acid (ABA) were much lower than those in upper and middle ones. At the late growth stage, dry matter of basal pods increased rapidly, which might be the cause of their lower abscission rates. It is therefore concluded that plant hormones play an important role in determining the fate of individual flowers and pods.

Key words: Soybean (Glycine max L.);Plant hormone;Abscission

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Citing This Article：

Li Xiuju, Meng Fanjing. Changes of plant hormones in the abscission of soybean reproductive organ. Acta Physiol Sin 1997; 49 (4): (in Chinese with English abstract).