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作 者 ：阎田 刘存德 沈全光

期 刊 ：植物学通报 1999年 16卷 05期 页码：606-609

关键词：植物向重性；过氧化物酶；钙离子；照光；

摘 要 ：植物向重性的机理研究与植物在微重力环境下的生长发育有关。本文在地基1×g重力场上进行了幼苗重力反应实验，结果表明：重力引起水平放置的幼苗过氧化物酶在根尖组织上、下侧的差异分布；在重力场上水平放置的幼苗其根尖向高钙(Ca2+)—侧弯曲生长；当给倒置幼苗的顶端照光时其负向地性消失。

Abstract:The study of plant gravitropism mechnism relates to growth and development of plant in microgravity enveronment. Gravity responses tests on ground-based gravity field (1 x g) were carried out. The results indicated that gravity caused asymmetrical distribution of peroxidase in both upperside and under side of the root tip of horizontally postioned seedlings; the root tip grew towards the high calcium (Ca2+ ) side of horizontally seedlings in gravity field; when the shoot apex of upsidedown positioned seedlings were illuminated with lamp, their negative geotmpism was lost.

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