nodule

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Related to Root nodules: nitrogen fixation

nodule:

see concretionconcretion,
mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the pore spaces of the sediment, usually around a fossil or fossil fragment acting as a nucleus.
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nodule

[′näj·ül]
(anatomy)
A small node.
A small aggregation of cells.
(botany)
A bulbous enlargement found on roots of legumes and certain other plants, whose formation is stimulated by symbiotic, nitrogen-fixing bacteria that colonize the roots.
(geology)
A small, hard mass or lump of a mineral or mineral aggregate characterized by a contrasting composition from and a greater hardness than the surrounding sediment or rock matrix in which it is embedded.
(medicine)
A primary skin lesion, seen as a circumscribed solid elevation.

nodule

1. any of the knoblike outgrowths on the roots of clover and many other legumes: contain bacteria involved in nitrogen fixation
2. Anatomy any small node or knoblike protuberance
3. a small rounded lump of rock or mineral substance, esp in a matrix of different rock material
References in periodicals archive ?
Glycoconjugate and lipid components of Rhizobium 'hedysari' IS123, a root nodule symbiont of the stress-tolerant legume, Hedysarium coronarium.
The applied herbicides did not show adverse effects on the number and dry weight of root nodules reported earlier by (Jha et al, 2014) and depicted in (Table 1).
A total of 60 bacterial isolates were isolated from root nodules of different plant species and screened out for their ability to grow on NFM medium.
The colour of root nodules varied from white to pink at 50 % flowering stage whereas at pod filling stage, some nodules were dark brown in color and were degenerating.
The number of root nodules favourably increased at 90 days than 45 days after inoculation of Rhizobium or Rhizobium + Glomus fasciculatum.
Finally, soybean seedlings without root nodules were planted in each plot.
The stages involved in root infection by rhizobial organisms with eventual formation of root nodules have been described by several researchers [5, 11, 14].
Genetic diversity and symbiotic effectiveness of rhizobia isolated from root nodules of common bean (Phaseolus vulgaris L.
Kudzu Zymbiozome Fermentum is based on an extraction from the root nodules of the kudzu plant (L.
Distribution of roots and root nodules and biomass allocation in young intensively managed grey alder stands on a peat bog.
2]-fixing ability, as indicated by nitrogenase activity in root nodules was similar in both NILs under the control conditions, and [N.