progressive cleavage

progressive cleavage
in the formation of spores within a sporangium, the production of a series of cleavage planes in succession, resulting first in formation of protospores and later in formation of sporangiospores.

Medical dictionary. 2011.

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  • protospore — The initial product of progressive cleavage, in which a multinucleate spore is produced. [proto + G. sporos, seed] * * * pro·to·spore (proґto spor) the first product of progressive cleavage, a multinucleate mass of cytoplasm surrounded by… …   Medical dictionary

  • sporangium — A saclike structure (a cell) within a fungus, in which asexual spores are borne by progressive cleavage. [L. fr. G. sporos, seed, + angeion, vessel] * * * spo·ran·gi·um spə ran jē əm n …   Medical dictionary

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