Department of Biology, Franklin and Marshall College, Lancaster, Pennsylvania 17604.
Plant Physiol. 1979 Jan;63(1):139-41. doi: 10.1104/pp.63.1.139.
Apical segments of etiolated oat (Avena sativa L. cv. Victory) coleoptiles showed enhanced uptake of [(86)Rb(+)] when tested 30 minutes after a 5-minute red irradiation. The response was partly reversible by far red light. Uptake was sensitive to carbonyl cyanide m-chlorophenyl hydrazone, but not to isotonic mannitol. Indoleacetic acid (10(-7) molar) caused a very pronounced and rapid stimulation of uptake. Basal coleoptile segments also exhibited a red light-enhanced uptake, but not an effect of red light on changes in the pH of the medium. The [(86)Rb(+)] uptake of third internode segments from etiolated peas (Pisum sativum L. cv. Alaska) was not affected by either red light or auxin. This tissue also showed no red light effect on acidification of the medium. It is concluded that alteration of [(86)Rb(+)] flux is not a general feature of phytochrome action.
当用 5 分钟红光照射后 30 分钟检测时，黄化燕麦（Avena sativa L. cv. Victory）中胚轴的顶端段对 [(86)Rb(+)] 的摄取增强。远红光部分可逆转该反应。摄取对羰基氰化物 m-氯苯腙敏感，但对等渗甘露醇不敏感。吲哚乙酸（10(-7) 摩尔）可引起摄取的显著快速刺激。基础中胚轴段也表现出红光增强的摄取，但红光对介质 pH 值变化没有影响。黄化豌豆（Pisum sativum L. cv. Alaska）第三节间段的 [(86)Rb(+)] 摄取不受红光或生长素的影响。该组织对介质酸化也没有红光效应。因此，可以得出结论，改变 [(86)Rb(+)] 通量不是光敏素作用的一般特征。
