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Article: Nod Factors Induce Nod Factor Cleaving Enzymes in Pea Roots. Genetic and Pharmacological Approaches Indicate Different Activation Mechanisms1
- Article from:
- Plant Physiology
- Article date:
- October 1, 2005
- Author:
CopyrightCopyright American Society of Plant Physiologists Oct 2005. Provided by ProQuest LLC. (Hide copyright information)
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Establishment of symbiosis between legumes and rhizobia requires bacterial Nod factors (NFs). The concentration of these lipochitooligosaccharides in the rhizosphere is influenced by plant enzymes. NFs induce on pea (Pisum sativum) a particular extracellular NF hydrolase that releases lipodisaccharides from NFs from Sinorhizobium meliloti. Here, we investigated the ability of non-nodulating pea mutants to respond to NodR1v factors (NFs from Rhizobium leguminosarum bv viciae) with enhanced NF hydrolase activity. Mutants defective in the symbiotic genes sym10, sym8, sym19, and sym9/sym30 did not exhibit any stimulation of the NF hydrolase, indicating that the enzyme is induced via an NF ...