Red Light and Auxin Effects on 86Rubidium Uptake by Oat Coleoptile and Pea Epicotyl Segments
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چکیده
منابع مشابه
Red light and auxin effects on rubidium uptake by oat coleoptile and pea epicotyl segments.
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 stimulati...
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It has been shown recently that treatment with gibberellic acid (GA) results in an increase in diffusible auxin in the pea (7), sunflower (7) and Centaurea (8). Treatment with GA also increases the amount of extractable auxin in peas (14), the potato tuber (18), Rhus typhina (13) and Trifoliuws ochroleucunm (15). Further it has been (lenmonstrated that in the dwarf pea and Cenitauirea the incre...
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The water permeability of tissues was investigated by measuring the efflux of (3)HHO from previously loaded (in darkness) etiolated bean buds (Phaseolus vulgaris L. var. Red Kidney), pea epicotyl segments (Pisum sativum L. var. Alaska), and oat coleoptile segments (Avena sativa L. var. Garry). Red light, far red light, or darkness was applied at the time of transfer of tissue from labeled to un...
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The enhancing effect of Ca on K uptake by excised roots has been known for some time (25) and has been referred to as the Viets effect; however, whether or not such an enhancement occurs in stem tissue has not been established. Indoleacetic acid (IAA) may enhance Rb uptake by stem segments (11) and this effect in Jerusalem artichoke tuber tissue has been attributed to an increase in capacity of...
متن کاملThe Reversible Inhibition by Red and Far-Red Light of Auxin-Induced Lateral Root Initiation in Isolated Pea Roots.
Lateral root formation induced in cultured isolated roots by decapitation can be inhibited by a single short exposure to white light and red light inhibits lateral root formation much more effectively than blue or green light (10). With the development of knowledge about phytochrome, a photomorphogenetically active red/far-red pigment system (3, 7), it became of interest to know whether the phy...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1979
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.63.1.139