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Home >>Botany Dictionary >> Ovule Culture - Oxygenotoxis Oxytaxis Oxygenotactic Oxytactic

Ovule Culture -
Said of the culture of excised ovules on suitable media in vitro for purpose of study or plant propagation.

Ovuliferous Scale. One of the scales of a fertile cone, in the Coniferae it bears ovules and later seeds.

Ovum - A non-motile female gamete.

Oxaloacetic Acid. COOH.CH2CO.COOH. It is formed in the citric acid cycle and glyoxylic cycle, from malic acid, and produces citric acid.

Oxidase - An enyme which brings about the oxidation of a substrate. Several enzymes may take part in oxidizing a substrate to its final form.

β-0xidation - An oxidation taking place between No.2 and No. 3 carbon atoms to form a double bond.

Oxidative Decarboxylation - Oxidation by the removal of carbon dioxide. e.g.CH3 0I " . C=O - CH -C+CO 3 .2 I I COOH HPyruvic acid.

Oxidative Phosphorylation - The formation of ATP from DPNH and oxygen, or TPNH and oxygen.

Oxidoreductases - A group of enymes catalysing oxidationS! and reductions.

Oxychromatin. A form of chromatin staining comparatively lightly, and has little nucleic acid. Oxygenotoxis, Oxytaxis, Oxygenotactic, Oxytactic. A response or reaction of an organism which takes place to the stimulus of oxygen.

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