planontn.
/ˈplanɒnt/, U.S. /ˈplæˌnɑnt/ Biology.
A motile spore, gamete, or zygote; esp. the motile stage of certain microsporidian protozoans or phycomycetes.
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the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > spore
sporule1819
zoocarp1824
zoospore1842
propagule1858
swarm-spore1859
macrozoospore1875
zygozoospore1881
swarm-cell1882
sporangiospore1889
planospore1904
planont1914
1914 H. B. Fantham & A. Porter Some Minute Animal Parasites xi. 217 This amœbula [of Nosema apis] gives rise, by division, to daughter forms, each possessing one nucleus and capable of wandering about over the epithelium of the gut. Such forms are called planonts, or wanderers.
1943 F. K. Sparrow Aquatic Phycomycetes 406 In A[llomyces] javanicus..the planonts emerging from the resting spores..gave rise upon germination to sexual plants.
1961 R. D. Manwell Introd. Protozool. xxiii. 478 At first they [sc. Nosema spores] remain in the gut, but they soon begin to wander and are now called ‘planonts’.
1986 Jrnl. Invertebr. Pathol. 48 259 The meiospore is uniflagellate, and has an ultrastructure typical of a blastocladian planont.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).
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n.1914