Monovalent Cations and Growth Regulation. I. Growth Responses in Cucumber Hypocotyl Segments
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چکیده
منابع مشابه
Regulation of Connexin Hemichannels by Monovalent Cations
Opening of connexin hemichannels in the plasma membrane is highly regulated. Generally, depolarization and reduced extracellular Ca2+ promote hemichannel opening. Here we show that hemichannels formed of Cx50, a principal lens connexin, exhibit a novel form of regulation characterized by extraordinary sensitivity to extracellular monovalent cations. Replacement of extracellular Na+ with K+, whi...
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The capacities of indole-3-acetic acid (IAA) and gibberellin A(3) (GA(3)) to counteract the inhibitory effects of (2-chloroethyl) trimethylammonium chloride (CCC), 2-isopropyl-4-dimethylamino-5-methylphenyl-1-piperidinecarboxylate methyl chloride (Amo-1618), and N,N-dimethylaminosuccinamic acid (B-995) on hypocotyl elongation in light-grown cucumber (Cucumis sativus L.) seedlings were investiga...
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Spontaneous growth was studied in excised mung bean (Phaseolus aureus Roxb.) hypocotyl segments. Measurements were made with a growth-recording apparatus using displacement transducers on single 5- to 6-millimeter samples excised from the growth zone immediately below the hook.Even for a given zone and under controlled experimental conditions, there are differences in the spontaneous growth of ...
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H, K, Rb, and Li inhibit Na-dependent alanine influx across the brush border of rabbit ileum. Kinetic analysis indicates that H and K behave as competitive inhibitors of influx so that increasing the concentration of H or K in the mucosal solution is kinetically indistinguishable from decreasing the Na concentration. In addition the coupling between alanine and Na influxes is markedly reduced a...
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Diacylglycerol contents of excised soybean (Glycine max L.) hypocotyl segments, incubated for 4 hours in the presence or absence of a growth promoting concentration of 2,4-dichlorophenoxyacetic acid (2,4-D) were monitored by three different methods as a sensitive measure of the action in vivo of C-type phospholipases. By all three methods, steady state levels of diacylglycerols representing abo...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1966
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.41.2.230