Dictionary of Xanthein, Dictionary of Xylose, Xanthophyll, X Body, X Chromosome, Xenia, Xerarch Succession, Xeric Environment, Xeromorphy

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Home >> Botany Dictionary >>Xanthein Xylose

Your Ad Here	Xanthein - A yellow pigment which is sometimes present in cell sap. Xanthophyll - C40 H55O2. A yellow pigment which is present in plastids. It is found along with chlorophyll in chloroplasts and occurs in other chromoplasts. It absorbs light at frequencies where absorption by ch1orophylls is poor and transfer absorbed energy to the chlorophylls. X Body - An inclusion in a plant cell which is suffering from a virus disease.
X Chromosome - A heterochromosome which is associated withthe determination of sex, and sometimes occurring alone. Xenia. In cross fertilisation the effect of the pollen on the form, colour, etc. of fruit or seed produced from it so that properties of the male are seen in the first stage of development and not, as normally, only in the plant produced. For example, in maize, the endosperm may show a variety of colours depending on the origin of pollen fertilising the female. Xenogamy - The pollination of a flower from a flower of the same species, but another plant.
Xeric - Describing condition of habitat which is characterized by deficiency of water (physical dryness or physiological dryness) High temperature and strong sunlight as in deserts. Xeric Environment - An environment in which the soil is having very little water, and the atmospheric conditions result in the rapid .loss of water from plants. Xeromorphy - Used for plants which are protected from loss of water by unusual morphological characteristics, e.g., thick cuticle. Xerarch Succession - Describing succession in xeric condition which leads to the formation of xerosere and ultimately results in stablization of the area from extreme condition of water deficiency.	Your Ad Here
Xeromorphy - Used for morphological characters which help in the reduction of water-loss. Xerophyte - A plant which can survive when the water supply is scanty or there is physiological drought. Xerophytes have been classified on the basis of their method of surviving in dryness into drought escaping, drought enduring and drought resistant xerophytes. On the basis of their stem and leaf morphology, they have been classified into microphyllous, sclerophyllous, succulent, mala-cophyllous and rolling xerophytes. Xylem Parenchyma - The parenchyma tissue which occurs in the xylem. See also ray initial, ray. Xylocarp - A hard wood-like fruit. Xylochrome - A mixed coluring substance which is produced by wood cells before their death and giving its dark colour to heartwood.
Your Ad Here	Xerosere - The set of communities which get formed by xerarch succession in xeric habitat ultimately lead to the establishment of climax in the area through stabilization from extreme conditions. Xylan - A polysaccharide which has xylose as major mono-saccharide subunit. It is abundant component of hemicellulose. Dominant homo cellulose in monocotyledons is an arabinoxylan which has arabinose sidechains attached to xylan backbone. Xylem (wood). A type of vascular tissue which is used mainly to translocate water and solutes. It has vessels, tracheids, fibre tracheids, libriform fibres and parenchyma cells. All these types of cells may not be presentina wood. Anatomy of xylem is important in taxonomy. Xylem occurs in association with phloem forming the vasculr bundle. XylemFibre - The fibre cell which is found in xylem tissue. See fibre.

Xylogen - Xylem in the process of development.

Xylology - The science of the structure of wood.

Xylometer - An instrument for measuring the density of wood.

Xylose (wood sugar). An aldopentose sugar which occurs widely in plants particularly in woody tissues, occurring mainly in its polymerized form xylan. It also occurs as a constituent of rare polysaccharide primeverose.

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Botany Dictionary - Part 2 Race - Recurrent Parent Red/Far Red Effects - Rf Value Rhamnose - Rusts Sac - Secondary Succession Secondary Thickening - Sex Chromosomes Sex Determination - Somatic Mutation Somatic Segregation - Stachyose Stalk Cell - Subsidiary Cell Subsoil - Systemic Tachysoporous - Termonasty Thermophile, Thermophillous, Thermophilic - Tree Ferns Tree Line - Type Spcimen UDP - Uva Vacuolation - Verruca Versatile - Volva Wallace Effect - Wracks Xanthein - Xylose Y Chromosome - Yellow Snow Z Chromosome - Zymohexose