/en"deuh sperrm'/, n. Bot.
nutritive matter in seed-plant ovules, derived from the embryo sac.
[1840-50; < F endosperme; see ENDO-, SPERM]

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▪ plant tissue
      tissue that surrounds and nourishes the embryo in the angiosperm seed. The initiation of endosperm is a definitive characteristic of angiosperms and requires the fusion of at least one nucleus in the embryo sac with a sperm nucleus from the pollen grain. (In gymnosperms the nutritive material of the seed is present before fertilization.) In some seeds the endosperm has been completely absorbed at maturity (e.g., pea and bean); in others, some is present until germination (e.g., wheat, castor bean). In the coconut, the liquid endosperm contains important growth substances. Endosperm accounts for the economic importance of cereal grains and oilseeds.

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  • Endosperm — is the tissue produced in the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein. This makes endosperm an important… …   Wikipedia

  • endosperm — ENDOSPÉRM, endosperme, s.n. Ţesut vegetal situat în vecinătatea embrionului, în care se înmagazinează substanţele de rezervă necesare creşterii embrionului. – Din fr. endosperme, germ. Endeosperm. Trimis de claudia, 13.09.2007. Sursa: DEX 98 … …   Dicționar Român

  • Endosperm — (von griechisch ἐντός, éndos = innen und σπέρμα, spérma = Same) ist das Nährgewebe der Samen, das den Keimling umgibt beziehungsweise das Nährgewebe im Embryosack der Samenpflanzen (Spermatophyta). Es ist der Nährstofflieferant, bis die… …   Deutsch Wikipedia

  • Endosperm — En do*sperm, n. [Endo + Gr. ? seed.] (Bot.) The albumen of a seed; limited by recent writers to that formed within the embryo sac. [1913 Webster] …   The Collaborative International Dictionary of English

  • endosperm — endosperm. См. эндосперм. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Endospérm — (griech.), in der Botanik ein Zellgewebe in den Samen (s. Embryosack und Same) …   Meyers Großes Konversations-Lexikon

  • Endospérm — (grch.), in der Botanik das im Embryosack nach Befruchtung der Eizelle gebildete Zellgewebe, das zur Ernährung des jungen Embryos dient …   Kleines Konversations-Lexikon

  • Endosperm — Endosperm, den Embryo umgebendes Nährgewebe im Samen der Spermatophyten. Das E. wird bei den Gymnospermen als haploides primäres E. aus dem Prothallium gebildet, bei den Angiospermen entsteht es i. A. als triploides sekundäres E. aus der… …   Deutsch wörterbuch der biologie

  • endosperm — c.1850, from ENDO (Cf. endo ) + SPERM (Cf. sperm) …   Etymology dictionary

  • endosperm — ► NOUN Botany ▪ the part of a seed which acts as a food store for the developing plant embryo …   English terms dictionary

  • endosperm — [en′dō spʉrm΄] n. [ ENDO + SPERM1] a tissue which surrounds the developing embryo of a seed and provides food for its growth endospermic adj. endospermous …   English World dictionary

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