Effects of maleic hydrazide on endogenous hormone contents in Longan seeds
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摘要: 通过对青鲜素(MH)诱导乌龙岭龙眼焦核种子的研究发现,MH处理乌龙岭龙眼后其种子GA3、IAA和ABA含量在整个发育过程中总体呈下降趋势,GA3含量成熟前达到最低;乌龙岭龙眼焦核的形成与激素之间的比值关系密切,种子形成期间,经MH处理龙眼ABA/GA3和ABA/IAA值高于对照,这可能是龙眼果实焦核的主要原因之一。Abstract: Maleic hydrazide(MH) was sprayed on a normal longan cultivar (Dimorcarpus longana Lour. cv. Wulongling) to induce the formation of shriveled seeds in longan. The results showed that the contents of gibberellin (GA3),indole-3-acetic acid (IAA) and abscissic acid (ABA) in the shriveled seeds decreased most of the time during fruit development,and the GA3 content reached the minimum at maturation. There was a significant reverse correlation between the formation of the shriveled seeds and the fruit's endogenous hormone content. During seed development,the ratios of ABA/GA3 and ABA/IAA in the seedless fruits were remarkably higher than the control. It was,therefore,concluded that the main reason of the normal longan seeds to become shriveled was due to a reduction of these endogenous hormones.
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Key words:
- maleic hydrazide(MH) /
- longan /
- shriveled-seed
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[1] LEOPOLD A C,NOODEN L O.Hormonal regulatory system in plants[J].In:Scott T K ed,Hormonal Regulation of Development Ⅱ.Berlin:Springer-verlag,1984:1. [2] FRANKLIN P G,PEARCE R B,ROGER L M.Physiology of Crop Plants[M].Ames,Iowa:Iowa state University Press,1985:201-242. [3] 王碧青,邱燕萍,向旭,等.荔枝结果过程中内源激素变化及单性结实结果的诱导[J].园艺学报,1997,24(1):19-24.
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