In:
Science, American Association for the Advancement of Science (AAAS), Vol. 319, No. 5867 ( 2008-02-29), p. 1241-1244
Abstract:
The specification and maintenance of growth sites are tightly regulated during cell morphogenesis in all organisms. ROOT HAIR DEFECTIVE 2 reduced nicotinamide adenine dinucleotide phosphate (RHD2 NADPH) oxidase–derived reactive oxygen species (ROS) stimulate a Ca 2+ influx into the cytoplasm that is required for root hair growth in Arabidopsis thaliana . We found that Ca 2+ , in turn, activated the RHD2 NADPH oxidase to produce ROS at the growing point in the root hair. Together, these components could establish a means of positive feedback regulation that maintains an active growth site in expanding root hair cells. Because the location and stability of growth sites predict the ultimate form of a plant cell, our findings demonstrate how a positive feedback mechanism involving RHD2, ROS, and Ca 2+ can determine cell shape.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.1152505
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2008
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
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