ISHS Acta Horticulturae 558: I International Symposium on Litchi and Longan
CHANGES IN ENDOGENOUS HORMONES AND POLYAMINE DURING FLOWERING OF LONGAN |
| Authors: | S.Q. Lin, Z.B. Zheng, H.J. Luo, G. Song, X. Guan |
| Keywords: | endogenous hormones, flowers, longan, polyamines |
| Abstract:
Changes in endogenous hormones and polyamines during flowering were studied in longan. Content of IAA (indole-3-acetic acid) were high during staminate differentiation and low during pistillate differentiation. The differentiation of flowers was accompanied by an increase in GA1+3 (gibberellic acid). ABA (abscisic acid) was low before sexual differentiation, but increased at anthesis. The ratio of (IAA+ZR+GA1+3): ABA increased during female flowering (ZR, zeatin), and then decreased at anthesis. A lower ratio appeared to benefit female flowering. Endogenous polyamine (PA) was always high, and the proportion of Put also always high. The ratio of (Spd + Spm): Put rose during staminate flower development, while decreased initially in pistillate flower, and then rose. High concentration of Put was associated with pistillate differentiation. | |
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