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生长素与乙烯对兰花授粉后花发育的调节作用 |
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张宪省 李全梓 郑成超
摘要：以朵丽蝶兰为材料，对乙烯和生长素调节的授粉后花的发育进行了研究。实验结果显示，切花和植株上的花授粉后，乙烯的产生和花的发育无明显差异；花瓣的衰老、子房发育、花粉萌发和花粉管的伸长受乙烯调节；与切花相比，植株上花的子房内无ACC合酶和ACC氧化酶mRNA的积累。用生长素运输抑制剂 2［(1-naphthalenylamino)carbonyl］ benzoic acid (NPA)处理柱头，授粉诱导的子房发育在很大程度上受到抑制, 表明授粉后子房的发育需要转运来的生长素。
关键词:授粉，乙烯，ACC合酶，ACC氧化酶，生长素，发育
学科分类号：Q945
Hormonal Regulation of Postpollination Development of Doritaenopsis Flowers by Auxin and Ethylene
ZHANG Xian-Sheng, LI Quan-Zi and ZHENG Cheng-Chao
(Department of Plant Sciences, Shandong Agricultural University, Taian, Shandong 271018)
Abstract：The regulation of postpollination development by auxin and ethylene was examined in Doritaenopsis flowers. These results showed that there were no detectable differences in pollination-induced ethylene production and pollination responses regulated by ethylene between detached and attached flowers. The effects of inhibitors of ethylene biosynthesis on early postpollination changes confirmed that perianth senescence, ovary development, pollen germination and pollen tube growth were regulated by ethylene. It has also been found that the flowers attached to the plant did not exhibit ACC synthase and ACC oxidase gene expression in the ovary. Pretreatment of the stigma with 2［(1-naphthalenylamino)carbonyl］ benzoic acid(NPA), an auxin transport inhibitor, blocked pollination-induced ovary development to a large extent, suggesting that the transport of auxin is required for normal ovary development.
Key words: pollination, ethylene, ACC synthase, ACC oxidase, auxin, development
Ethylene plays an important role in regulating plant growth and development and is involved in the pollination responses of many flowers (Nichols et al. 1983, Yang and Hoffman 1984, Halevy 1986). Pollination-induced ethylene production and senescence of flowers have been extensively investigated (Gilissen 1977, Nichols et al. 1983, Reid et al. 1984, Wolter[1] [2] [3] 下一页
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