Publication Date:
1991-09-20
Description:
Bean leaf stomata provide a topographical signal that induces germlings of the phytopathogen Uromyces appendiculatus to develop specialized infection structures. Protoplasts from germ tubes of this fungus, when examined with patch-clamp electrodes, displayed the activities of a 600-picosiemen mechanosensitive ion channel. This channel passes a variety of cations, including Ca2+, and is blocked by Gd3+ at 50 micromolar. This channel could transduce the membrane stress induced by the leaf topography into an influx of ions, including Ca2+, that may trigger differentiation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhou, X L -- Stumpf, M A -- Hoch, H C -- Kung, C -- New York, N.Y. -- Science. 1991 Sep 20;253(5026):1415-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, University of Wisconsin, Madison 53706.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1716786" target="_blank"〉PubMed〈/a〉
Keywords:
Barium/pharmacology
;
Basidiomycota/*physiology/ultrastructure
;
Cell Membrane/physiology/ultrastructure
;
Gadolinium/pharmacology
;
Ion Channels/drug effects/*physiology/ultrastructure
;
Mechanoreceptors/physiology
;
Membrane Potentials
;
Pressure
;
Tetraethylammonium
;
Tetraethylammonium Compounds/pharmacology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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