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Based on an exhaustive collection of terms from various sources, RiceVocs - A Compendium of Rice related vocabulary has been developed. This document along with Information Architecture is used for tagging purposes to make RKMP a semantic portal.

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Autopolyploid

A polyploid which possesses duplication of the same set of chromosomes, or more than two sets of chromosomes, coming from same species.

Autoradiogram

The photographic record of a chromatogram that contains radioactively labeled compounds. Prepared by exposing a sensitive photographic film to the radioactive radiation by placing it in contact with the chromatogram.

Autosomes

Chromosomes not associated with sex of the bearer.

Autotroph

A cell or organism that manufactures its own food from co2 and other small inorganic compounds by the process of photosynthesis.

Auxins

A group of growth regulators or plant hormones (natural or synthetic) that may stimulate cell growth and induce cell elongation or division; often induce adventitious roots, root development, and other growth processes including seed germination. Auxins have an essential role in coordination of many growth and behavioral processes in the plant life cycle.

Auxotroph

An auxotroph is an organism which is not able to synthesize a particular organic compound required for its growth.

Available nutrient

An element in the soil which can be readily absorbed and assimilated by growing plants.

Available water

The portion of water held in soil, which may be absorbed into the roots of the plant.

Avirulent micro-organism

A plant pathogenic micro-organism which is not capable of producing infection on the host plant avoidance.

Awn

A bristle like extension of varying length originating from the lemma of the rice spikelet. Present in some varieties.

Axenic

Free of all other associated life, said of organisms isolated in soil culture; germ-free.

Axil

The upper angle between a leaf or a branch or a stem from which it arises.

Axillary

Arising in an axil.

Azolla

A water fern that fixes nitrogen symbiotically with the blue-green alga anabaena.

Azotobacter

Azotobacter is a genus of usually motile, oval or spherical bacteria that form thick-walled cysts and may produce large quantities of capsular slime. They are aerobic, free-living soil microbes which play an important role in the nitrogen cycle in nature, binding atmospheric nitrogen, that is inaccessible to plants and releasing it in the form of ammonium ions in to the soil.

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