BENZYLADENINE-INDUCED STIMULATION OF 2 COMPONENTS OF CHLOROPHYLL FORMATION IN ETIOLATED CUCUMBER COTYLEDONS
BENZYLADENINE-INDUCED STIMULATION OF 2 COMPONENTS OF CHLOROPHYLL FORMATION IN ETIOLATED CUCUMBER COTYLEDONS
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DOI：
10.1111/j.1399-3054.1984.tb02793.x
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发表时间：
1984-01-01
影响因子：
6.4
通讯作者：
DEI, M
中科院分区：
文献类型：
--
作者：
DEI, M
离体黄瓜黄化子叶（C. sativus L. CV. Aonagajibai）在不同强度的白色光下连续照射。在滞后期期间叶绿素（Chl）形成的速率在高于1.4 μ mol m-2s-1的注量率时达到平台。这是真实的，在水控制和苄基腺嘌呤（BA）预处理的子叶。在黑暗中用BA预处理14小时的子叶中（在这种情况下，Chl形成在滞后期和稳态期都受到BA的刺激），与水对照相比，Chl形成的稳态速率随着光强度的增加而增加，在能流率0.25-43 μ mol m-2s-1的范围内。在黑暗中用BA预处理6小时的子叶中（仅在滞后期期间刺激Chl形成），仅将能流率从0.25 μ mol m-2s-1增加到1.4 μ mol m-2s-1就引起BA处理的子叶中Chl形成比水对照中更高的增加。叶绿素形成的时间过程表明，BA诱导的迟现效应（刺激稳态速率）在低强度光照下几乎不存在，但BA诱导的快现效应（消除滞后期）在所有强度下都有效。叶绿素形成过程显然由两个组成部分组成，其操作周期或光强度要求不同。BA刺激快速和迟发效应中相应组分的速率。
Excised etiolated cotyledons of cucumber (C. sativus L. cv. Aonagajibai) were continuously irradiated under various intensities of white light. The rate of chlorophyll (Chl) formation during the lag phase reaches a plateau at fluence rates above 1.4 .mu.mol m-2 s-1. This is true in both water-control and benzyladenine (BA)-pretreated cotyledons. In cotyledons pretreated for 14 h with BA in darkness (in which case, Chl formation is stimulated by BA during both the lag and the steady-state phases), the increase in the steady-state rate of Chl formation with increasing light intensity is stimulated compared to that of the water control over the range of fluence rates, 0.25-43 .mu.mol m-2 s-1. In cotyledons pretreated for 6 h with BA in darkness (only Chl formation during the lag phase is stimulated), only an increase in fluence rate from 0.25 to 1.4 .mu.mol m-2 s-1 causes a higher increase in the Chl formation in the BA-treated cotyledons than in the water control. The time course of Chl formation shows that the BA-induced late-appearing effect (stimulation of the steady-state rate) is almost absent at low intensity illumination, but the BA-induced fast-appearing effect (elimination of the lag phase) is effective at all intensities. The Chl-forming process apparently consists of 2 components, whose periods of operation or light-intensity requirements are different. BA stimulates the rates of the respective components in both the fast and the late-appearing effects.