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Science 6 September 1996:
Vol. 273. no. 5280, pp. 1338 - 1339
DOI: 10.1126/science.273.5280.1338
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Research News

Jean Marx

For many years, plant biologists assumed that the rigid cell walls of plant cells close off one major avenue of cell-to-cell communication--the peptide and protein signals through which animal cells coordinate their activities. These signaling molecules, the prevailing wisdom held, are just too big to penetrate the plant cell wall. But a cluster of recent findings is changing that view. A Report in a recent issue of Science described a peptide signal that regulates the formation of nitrogen-fixing root nodules in legumes. And a series of findings, reported on page 1406 and elsewhere, shows that plant cells have receptor molecules that look very much like the peptide receptors of animal cells.


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