Authors
Seiji Takeda, Catherine Gapper, Hidetaka Kaya, Elizabeth Bell, Kazuyuki Kuchitsu, Liam Dolan
Publication date
2008/2/29
Journal
science
Volume
319
Issue
5867
Pages
1241-1244
Publisher
American Association for the Advancement of Science
Description
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 Ca2+ influx into the cytoplasm that is required for root hair growth in Arabidopsis thaliana. We found that Ca2+, 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 Ca2+ can determine cell shape.
Total citations
Scholar articles
S Takeda, C Gapper, H Kaya, E Bell, K Kuchitsu… - science, 2008