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A spore which is produced by heterogamous fertilization and from which the sporophytic generation develops.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the resting zygote in lower plants that have an oogonium. The oospore has a considerable reserve of nutritive matter, which is used during sprouting, and a thick, multilayer wall, which provides protection from such unfavorable conditions as drought or cold. When the oospore sprouts, its nucleus divides with reduction.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Germination of Chara vulgaris and Nitella flexilis oospores: What are the relevant factors triggering germination?
First identification key for charophyte oospore from central Europe.
Celakovsky (1874) had recognized three generations in the life cycle of Coleochaete: zoospore-producing thalli (A); gamete-producing thalli (B); and the multicellular body produced from the fertilized oospore (C).
The latter two species are heterothallic thus did not produce oospores and or sexual structures in single cultures.
Thermal inactivation of Phytophthora capsisi oospores. Rev.
Inoculum is provided by oospores ploughed into the soil and airborne sporangia from preplanted rows of infected pearl millet genotypes.
- Pythium inoculum containing active mycelia and oospores that could survive in and infest the soil of treatment plants was prepared by growing the five Pythium isolates in sterile grass blade cultures (Martin 1992).
Mating behavior of Phytophthora parasitica: Evidence for sexual recombination in oospores using DNA restriction fragment length polymorphisms as genetic markers.
"Sexually produced spores, called oospores, have a protective cell wall that allows them to live in the soil, infected stems, and tubers and still be viable the following season."