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. Signal., 18 September 2012
Vol. 5, Issue 242, p. ec247
[DOI: 10.1126/scisignal.2003610]


Plant Biology It’s the Pits

Pamela J. Hines

Science, AAAS, Washington, DC 20005, USA

Cellular shape is tied to the cytoskeleton, with specialized regions of the plasma membrane attracting or repelling microtubules, a process mediated by the microtubule binding protein MIDD1. In plants, individual xylem cells are peppered with open pits that facilitate fluid transport, and so Oda and Fukuda studied ROP (Rho family guanosine triphosphatases of plants) proteins from xylem cells to investigate how pits develop. Formation of the pits seems to depend on MIDD1 to destabilize the microtubules at that point. A cascade of ROP proteins establishes the point at which MIDD1 functions, and reverse inhibition of one of the ROP proteins keeps the pit formation focused on a point.

Y. Oda, H. Fukuda, Initiation of cell wall pattern by a Rho- and microtubule-driven symmetry breaking. Science 337, 1333–1336 (2012). [Abstract] [Full Text]

Citation: P. J. Hines, It’s the Pits. Sci. Signal. 5, ec247 (2012).

To Advertise     Find Products

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