endosperm


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en·do·sperm

(en'dō-spĕrm),
A storage tissue found in many seeds that nourishes the embryo of a plant.
Farlex Partner Medical Dictionary © Farlex 2012

endosperm

a TRIPLOID (1) tissue found in many angiosperm seeds (e.g. those of the castor oil plant), that serves as a food source for the embryo which develops within it. Nonendospermic seeds (e.g. the runner bean) store their food substances within the cotyledons. See EMBRYO SAC for origin.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
In a literature review on endothelium, Werker (1997) suggests several functions for this tissue, such as transference of nutrients, temporary accumulation of nutrients, ability to act in metabolizing dissolved products in its own cells, secretion of digestive enzymes, and also act as a limiting barrier, preventing the embryo and endosperm from excessive growth.
Polishing removes the aleurone layer and embryo which parts of the rice grain are richer with vitamins, minerals, protein and fiber than the endosperm itself.
produce viable seeds containing well-developed endosperm. Conversely, in
Moreover, according to Amato and Elias (2005), the hydrothermal treatment allows the outer layers (which form the pericarp, tegument, the nucellus, and aleurone cells of the endosperm and part of the embryo, especially the scutellum) to be partially loosened and aggregated into the starchy endosperm of the caryopsis, so that the embryo remains in place, not easily detached during hulling, causing the increment observed in this study.
Farmers may be provided compre- hensive training to cultivate Guar along modern scientific lines, select- ing the right variety of seeds which give higher yield with high endosperm content.
The seeds are then pulverized and the germ is separated from endosperm, which contains about 80 percent Galactomannan gums, and polysaccharides.
Endosperm rupture is the main limitation for germination of tomato seeds, weakening of the micropylar endosperm surrounding the radicle tip appears to be required for radicle protrusion and is likely to involve cell-wall hydrolysis by hydrolytic enzymes (Bewley, 1997).
The building pressure and rising heat causes the starchy endosperm to become soft and jelly like.
Lipid levels decreased significantly over the first 10 days from sowing (Figure 1), more significantly between the sixth and eighth days from the external to the internal portion of the endosperm. It can be observed that the edges of the lipid bodies react positively to the Bromophenol Blue, indicating the presence of proteins in this region of the droplet (Figure 2).
Electron microscopy of cereal grains : Micronizing barley greatly increased the resistance of protein in the endosperm to digestion.
The reduction system consists of a sequential series of roller mills and sifters used to reduce the endosperm to flour.
The outermost layer of the endosperm, called the aleurone layer, is bound tightly to the starchy endosperm.