Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.


Sci. STKE, 12 December 2000
Vol. 2000, Issue 62, p. tw1
[DOI: 10.1126/stke.2000.62.tw1]

EDITORS' CHOICE

Plant Biology Stomatal Pore Density

As atmospheric CO2 concentration increases, the density of stomatal pores on the leaf surface decreases to prevent loss of water during transpiration. An analysis of mutants by Gray et al. reveals that a gene in the plant Arabidposis thaliana called high carbon dioxide (HIC) may be responsible for regulating stomatal development in response to CO2. HIC, expressed exclusively in guard cells that flank stomatal pores, encodes a putative 3-keto acyl coenzyme A synthase, an enzyme involved in synthesizing long-chain fatty acids that comprise components of the extracellular matrix found at the surface of guard cells. When HIC expression is disrupted, plants can no longer respond to increases in CO2. The authors propose that absence of the HIC-encoded enzyme could alter the composition of the extracellular matrix and thus affect diffusion of CO2-regulated morphogens that regulate stomatal development.

Gray, J.E., Holroyd, G.H., Van der Lee, F.M., Bahrami, A.R., Sijmons, P.C., Woodward, F.I., Schuch, W., and Hetherington, A.M. (2000) The HIC signalling pathway links CO2 perception to stomatal development. Nature 408: 713-716. [Online Journal]

Citation: Stomatal Pore Density. Sci. STKE 2000, tw1 (2000).


To Advertise     Find Products


Science Signaling. ISSN 1937-9145 (online), 1945-0877 (print). Pre-2008: Science's STKE. ISSN 1525-8882