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 ?
According to table 5, rapid drying led to reduction in endo-[beta]-mannanase activity in whole seeds and in the embryos of coffee seeds under natural processing; however, lower enzyme activity was reported in endosperms when slow drying and natural processing were used.
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).
For L-[[sup.35]S]-methionine incorporation studies, 400 to 500 mg of freshly isolated endosperms from field-grown ears were equilibrated for 30 min in 3 mL of aerated buffer osmoticum.
Dent corns have a central flour endosperm surrounded by a flinty endosperm that shrink at different rates as kernels dry, causing a dent to form in the top of each kernel Almost all hybrid field corns are dents, as are the most productive OP varieties.
Starch Accumulation and Amylopectin Structure: As shown in Figure 2, temperature treatments during grain filling had a considerable influence on the total starch accumulation and apparent amylose content in rice endosperms, with high temperature treatment exhibiting lower accumulation of total starch in rice endosperms than low temperature treatment, irrespective of rice genotypes (Figure 2A).
On the other hand, if the ultimate goal of a breeding program is to increase endosperm components, it is valuable to minimize the embryo size.
In maize, many endosperm starch mutants have been identified and their effects on the enzymes that regulate carbohydrate metabolism and starch synthesis have been described (Shannon and Garwood, 1984).
Similarly, in previous studies of maize, pre-pollination water deficit had no effect or slightly increased sugar concentrations in unpollinated ovary tissues (Schussler and Westgate, 1991b, 1994; Schussler and Westgate, 1995; Zinselmeier et al., 1995b), while post-pollination water deficit did not substantially affect sugar concentrations in developing endosperms (Ober et al., 1991).
Endosperm FW data were taken at the time of endosperm preparation for FCM; nine endosperms (three kernels per petri dish x three replicates) per HTT were weighed to determine endosperm FW.
After removing the pericarp and embryo from frozen kernels with forceps, the endosperm was lyophilized, finely ground in liquid N with a mortar and pestle, and returned to -80 [degrees] C.