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作 者 ：周卫;林葆

期 刊 ：植物营养与肥料学报 2000年 6卷 2期 页码：214-219

关键词：苹果幼果组织；Ca2+运输途径；激素；

Keywords:youngfruittissueofapple, pathwaysofCa2+movement, phytohormone,

摘 要 ：采用⁴⁵Ca示踪 ,⁴⁵Ca显微放射自显影和X 射线能谱分析技术 ,探索苹果幼果组织钙运输途径及激素对该途径的调控方式。结果表明 ,表皮层并未完全阻碍Ca²⁺由质外体进入果肉组织 ,Ca²⁺可通过质外体和共质体两种途径在幼果组织中运输 ,以质外体途径为主 ;IAA、GA和NAA虽对幼果组织Ca²⁺的运输均有明显的促进作用 ,但机理不同。GA主要促进Ca²⁺由质外体途径进入幼果组织 ,而IAA和NAA主要促进幼果中Ca²⁺的共质体途径运输。

Abstract:Pathways of Ca²⁺ movement in young fruit tissue of apple and its regulation by hormones were probed by using ⁴⁵Ca tracer technology, ⁴⁵Ca micro autoradiography and X ray microanalysis etc. The results showed that Ca²⁺ entering into fruit pulp tissue in apoplasmic pathway was not completely prevented by the epidermis of fruit, and Ca²⁺ moved from fruit surface into pulp tissue in both apoplasmic and symplasmic pathways,mainly via apoplasmic. Ca²⁺ radial transport in fruit tissue could be accelerated by IAA,GA and NAA. It seemed that Ca²⁺ movement in symplasmic pathway were mainly promoted by IAA and NAA, while that in apoplasmic pathway by GA.

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