Ameliorative effect of polyamines on the high temperature inhibition of in vitro pollen germination in tomato (Lycopersicon esculentum Mill.)

文献类型： 外文期刊

第一作者： Song, JJ

作者： Song, JJ;Nada, K;Tachibana, S

作者机构：

关键词： high temperature;pollen germination;polyamine;tomato

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 1999 年 80 卷 3-4 期

页码：

收录情况： SCI

摘要： Effect of polyamines on in vitro pollen germination at high temperatures in tomato (Lycopersicon esculentum Mill.) was investigated. Pollen germination and tube growth were significantly inhibited at 33 degrees C and 35 degrees C compared to those at 25 degrees C. This inhibition was reversed by the addition of spermidine or spermine in the germination medium. Spermidine at 0.5 mM was slightly more effective than spermine at 0.05 mM. Spermidine at 0.05 and 0.5 mM and spermine at 0.05 mM slightly increased pollen germination rates at 25 degrees C. Spermidine at 5 mM and spermine at 0.5 M were inhibitory to pollen germination, regardless of incubation temperatures. Spermidine also promoted germination of pollen grains incubated at 38 degrees C for 1 and 3 h and then at 25 degrees C for the rest of the 20 h incubation period. The effect was higher at 0.5 mM than at 0.05 mM. Treatment of spermidine to intact flowers 1 day before anthesis was also effective in ameliorating the high temperature inhibition of in vitro pollen germination on the polyamine-free medium. Here, the optimum concentration was 5 mM. These results demonstrate that polyamines can counteract the inhibitory effects of high temperature on pollen germination. They also suggest that the endogenous level of polyamines in germinating pollen grains is an important factor for the pollen germinability at high temperature. (C) 1999 Elsevier Science B.V. All rights reserved.

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