root nodule


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Related to root nodule: Rhizobium bacteria

root nodule

n
(Botany) a swelling on the root of a leguminous plant, such as the pea or clover, that contains bacteria of the genus Rhizobium, capable of nitrogen fixation
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References in periodicals archive ?
Stress tolerance and symbiotic and phylogenic features of root nodule bacteria associated with Medicago species in different bioclimatic regions of Tunisia.
ISLAMABAD -- A study into the significance of the plant microbiomes has found the first direct evidence that nitrogen fixation can occur in the branches of trees with no root nodule required.
Lugtenberg, "Role of rhizobial lipo-chitin oligosaccharide signal molecules in root nodule organogenesis," Plant Molecular Biology, vol.
trifolii in culture, indicating that the suppression of nodule formation resulted from competition with the root nodule bacteria.
They study commonalities in the plant symbiotic genes involved in root nodule symbiosis and in arbuscular micorrhiza that are also associated with roots with plant growth promoting rhizobacteria for nutritional (N2 fixation) or defensive (suppression of pathogens) functions.
His results indicated that charcoal application significantly enhanced root nodule formation, plant growth, and yields (shown in Fig.
The [O.sub.2]-diffusion barrier exists in the root nodule cortex that surrounds the central zone of infected cells to maintain low [O.sub.2] concentration, because nitrogenase is irreversibly inactivated by [O.sub.2] (Hunt and Layzell, 1993).