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首页> 美国卫生研究院文献>Plant Physiology >A Red-Far Red Reversible Effect on Uptake of Exogenous Indoleacetic Acid in Etiolated Rice Coleoptiles
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A Red-Far Red Reversible Effect on Uptake of Exogenous Indoleacetic Acid in Etiolated Rice Coleoptiles

机译：红远红对黄化胚芽鞘中外源吲哚乙酸摄取的可逆作用

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摘要

The uptake and accumulation of exogenous indoleacetic acid-14C by intact rice coleoptiles were examined. The absorption of exogenous indoleacetic acid was controlled by phytochrome, while the subsequent accumulation of this indoleacetic acid in various portions of the coleoptile was complex, and the effect of red light in this system was small compared to the alteration of the uptake of indoleacetic acid by red light. The absorption of indoleacetic acid exhibited two phases: the first occurring during the first 3-hour portion of the incubation was an inhibition, while the second was a promotive effect at about the 5th hour of incubation. Both of these effects were red, far redreversible, implicating phytochrome in this effect. Neither the destruction nor the immobilization of this exogenous indoleacetic acid apeared to be greatly affected by red light irradiation. The principal interaction between phytochrome and indoleacetic acid appears to occur during the absorption of exogenous indoleacetic acid. This effect may be related to the control by phytochrome of the amount of auxin which diffuses from coleoptile tips.
机译：研究了完整的水稻胚芽鞘对外源吲哚乙酸- 14 C的吸收和积累。植物色素控制外源吲哚乙酸的吸收，而随后吲哚乙酸在胚芽鞘各部分的积累很复杂，与该体系改变吲哚乙酸的吸收相比，该体系中红光的影响很小。红灯。吲哚乙酸的吸收表现出两个阶段：第一个发生在孵育的前3小时部分是一种抑制作用，而第二个发生在孵育的第5小时有促进作用。这两种作用都是红色的，极不可逆，与这种作用相关的是植物色素。这种外源吲哚乙酸的破坏或固定都不会受到红光辐射的很大影响。植物色素和吲哚乙酸之间的主要相互作用似乎发生在吸收外源吲哚乙酸的过程中。该作用可能与通过植物色素控制从胚芽鞘尖端扩散的生长素的量有关。

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