绿豆下胚轴离子流和光敏色素质子：II. 顶端和弯钩段的氯化物、质子和正磷酸盐流。
Ion Fluxes and Phytochrome Protons in Mung Bean Hypocotyl Segments: II. Fluxes of Chloride, Protons, and Orthophosphate in Apical and Subhook Segments.
机构信息
Department of Plant Biology, The University, Newcastle upon Tyne, NE1 7RU, United Kingdom.
出版信息
Plant Physiol. 1979 Aug;64(2):211-3. doi: 10.1104/pp.64.2.211.
Abstract
The active form of phytochrome (Pfr) decreased CI(-) uptake by subhypocotyl hook segments of Phaseolus aureus Roxb. and increased uptake by apical segments. Pfr had similar effects on Pi [(32)Pi] uptake. Modulations of Pi [(32)Pi] uptake were detectable 10 minutes following photoconversion. Pfr may modulate Pi influx across the plasmalemma. Pfr inhibited H(+) extrusion by subhook segments and enhanced extrusion by apical hook segments. No rapid effects on H(+) extrusion were found. Phytochrome may regulate a K(+) -H(+) exchange process. The differential responses of the two regions of the hypocotyl are discussed with respect to Pfr-mediated changes in growth and development.
摘要
光敏色素的活性形式（Pfr）降低菜豆下胚轴弯钩段对 CI(-)的摄取，增加顶端段的摄取。Pfr 对 Pi[(32)Pi]摄取也有类似的影响。光转化后 10 分钟即可检测到 Pi[(32)Pi]摄取的调节。Pfr 可能调节质膜上的 Pi 流入。Pfr 抑制下钩段的 H(+)外排，增强顶端钩段的 H(+)外排。未发现对 H(+)外排的快速影响。光敏色素可能调节 K(+) -H(+)交换过程。讨论了下胚轴两个区域的差异反应，以及 Pfr 介导的生长和发育变化。
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