A tobacco syntaxin with a role in hormonal control of guard cell ion channels

Citation
B. Leyman et al., A tobacco syntaxin with a role in hormonal control of guard cell ion channels, SCIENCE, 283(5401), 1999, pp. 537-540
Citations number
39
Categorie Soggetti
Multidisciplinary,Multidisciplinary,Multidisciplinary
Journal title
SCIENCE
ISSN journal
00368075 → ACNP
Volume
283
Issue
5401
Year of publication
1999
Pages
537 - 540
Database
ISI
SICI code
0036-8075(19990122)283:5401<537:ATSWAR>2.0.ZU;2-M
Abstract
The plant hormone abscisic acid (ABA) regulates potassium and chloride ion channels at the plasma membrane of guard cells, Leading to stomatal closure that reduces transpirational water loss from the leaf. The tobacco Nt-SYR1 gene encodes a syntaxin that is associated with the plasma membrane. Synta xins and related SNARE proteins aid intracellular vesicle trafficking, fusi on, and secretion. Disrupting Nt-Syr1 function by cleavage with Clostridium botulinum type C toxin or competition with a soluble fragment of Nt-Syr1 p revents potassium and chloride ion channel response to ABA in guard cells a nd implicates Nt-Syr1 in an ABA-signaling cascade.