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, 1 February 2005
Vol. 2005, Issue 269, p. tw49
[DOI: 10.1126/stke.2692005tw49]



In flowering plants, the immotile sperm cells are transported toward the egg through the pollen tube, which navigates its own path from the pollen grain to the female gametophyte. Márton et al. have now identified one of the signals likely to guide the pollen tube. Studying maize, a small egg apparatus-derived protein, ZmEA1, was found to light up the way for the final steps of pollen tube guidance. The ZmEA1 gene was expressed in the egg apparatus, and the protein acted as a short-range signal required for successful fertilization. After fertilization, ZmEA1 expression was rapidly down-regulated.

M. L. Márton, S. Cordts, J. Broadhvest, T. Dresselhaus, Micropylar pollen tube guidance by egg apparatus 1 of maize. Science 307, 573-576 (2005). [Abstract] [Full Text]

Citation: Let ZmEA Guide You. Sci. STKE 2005, tw49 (2005).

To Advertise     Find Products

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