perisperm


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Related to perisperm: funiculus, pericarp, nucellus

per·i·sperm

 (pĕr′ĭ-spûrm′)
n. Botany
A layer of nutritive tissue in the seed of certain flowering plants that is derived from the nucellus and surrounds the embryo.

perisperm

(ˈpɛrɪˌspɜːm)
n
(Botany) the nutritive tissue surrounding the embryo in certain seeds, and developing from the nucellus of the ovule
ˌperiˈspermal, ˌperiˈspermic adj
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.perisperm - the nutritive tissue outside the sac containing the embryo in some seeds
plant tissue - the tissue of a plant
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References in periodicals archive ?
There are also other terms that are used in the descriptions of cycad, seeds and embryos that need clarification such as endotesta, perisperm, epicotyl and hypocotyl.
The term perisperm is a term used for the remains of the nucellus in dicotyledonous seeds (Fahn 1982) and could be used for the remains of the nucellus covering the micropylar end of the female gametophyte, but not for the pleurotesta.
Other nucellar and chalazal structures, such as hypostase, perisperm, and chalazosperm, are regarded as being of some systematic significance in monocotyledons and are used as characters in analyses.
Likewise, the term "ruminate endosperm" must not be used if only the perisperm is affected, as in Piperaceae and Marantaceae (Huber, pers.
Examples include the pluralised nouns FORESHORES, HANDSTANDS, HARUMSCARUMS, HELTERSKELTERS, HOTSPOTS, NICKSTICKS, PERISPERMS, POOPERSCOOPERS, POROSPORES (st), POTSHOTS, RICKSTICKS, TYLOSTYLES, and the verb OVERHOVERS.