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Science 19 June 1981:
Vol. 212. no. 4501, pp. 1394 - 1396
DOI: 10.1126/science.212.4501.1394
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Articles

Uninfected Cells of Soybean Root Nodules: Ultrastructure Suggests Key Role in Ureide Production

ELDON H. NEWCOMB 1 and SHIV R. TANDON 2

1 Department of Botany, University of Wisconsin, Madison 53706
2 Department of Biology, University of Wisconsin, Platteville 53818

In soybean root nodules, which export recently fixed nitrogen mainly as the ureides allantoin and allantoic acid, cells uninfected by rhizobia undergo a pronounced ultrastructural differentiation not shown by the infected cells, including enlargement of the microbodies and proliferation of smooth endoplasmic reticulum. Since some of the enzymes contributing to ureide synthesis occur in these subcellular components in root nodule preparations, the uninfected cells may participate in ureide synthesis and thus play an essential role in the symbiosis between host and bacterium.

Submitted on December 2, 1980
Revised on April 8, 1981


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Cloning and Expression of the Gene for Soybean Hydroxyisourate Hydrolase. Localization and Implications for Function and Mechanism.
A. Raychaudhuri and P. A. Tipton (2002)
Plant Physiology 130, 2061-2068
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Science. ISSN 0036-8075 (print), 1095-9203 (online)