Journal
PLANT SIGNALING & BEHAVIOR
Volume 6, Issue 7, Pages 1034-1036Publisher
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.6.7.15601
Keywords
ecto-apyrases; extracellular nucleotides; nod factor; nodulation; reactive oxygen species
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Funding
- Department of Energy, Chemical Sciences, Geosciences and Biosciences [DE-FG02-02ER15309]
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Root nodulation is regulated by a variety of mechanisms. Ecto-apyrase is an enzyme proposed to control the concentration of extracellular nucleotides. Transgenic expression of the soybean GS52 ecto-apyrase was shown to stimulate nodulation. However, mutation of the enzyme to disrupt enzymatic activity prevented this effect. Therefore, the data suggest that the enzymatic activity of the ecto-apyrase is critical for nodulation enhancement, suggesting a direct effect on extracellular nucleotide hydrolysis. In this article, we propose a hypothetical mechanism for plant ecto-apyrase function during nodulation.
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