(n.) A spore formed by the union of several zoospores; -- called also zygozoospore.
Example Sentences:
(1) Zygospore development in Blakeslea trispora was studied using light microscopy, scanning electron microscopy, transmission electron microscopy and freeze fracturing technique.
(2) However, normal mating efficiencies and high zygospore viability are observed in clonal culture, indicating the unbiased production of functional opposite mating-types.
(3) The zygospore contained a very high concentration of chitin (about 17%), three times more than the mycelial concentrations.
(4) Some of these non-recombinant individuals may be derived from "parthenospores" (dormant asexual cells resembling zygospores).
(5) In order to study the mechanism responsible for the uniparental transmission of the mitochondrial genome in crosses between Chlamydomonas reinhardtii and C. smithii, we have analyzed the fate of mitochondrial DNA during gametogenesis, zygospore differentiation and sporulation by hybridization experiments.
(6) In strain 137F of Chlamydomonas reinhardi, the zygospores undergo one round of nuclear DNA replication followed by three divisions to produce octospores.
(7) The young diploid zygote differentiates into dormant zygospore competent to complete meiosis, or more rarely (2-10% of cases) it undergoes mitosis to produce a stable diploid progeny.
(8) Using appropriate restriction enzymes, we have been unable to detect methylation of the mitochondrial DNA during gametogenesis or zygospore formation.
(9) Light is required for total elimination of mt+ mitochondrial DNA in the zygospores.
(10) Changes in the relative abundance of cell constituents of Entomophthora virulenta Hall & Dunn were studied during the various differentiation phases leading to the formation of zygospores.
(11) Zygophores interlock upon contact and then undergo six successive morphological changes to become a zygospore.
(12) Some zygospores do form in crosses of carA mutants and wild types.
(13) Zygospores from this strain undergo two rounds of nuclear DNA replication prior to the formation of octospores.
(14) The results obtained with D. discoideum macrocysts differ from those obtained with other cellular slime moulds--Dictyostelium mucoroides, Dictyostelium giganteum and Polysphondylium pallidum--and are reminiscent of the results reported for germinated zygospores of Phycomyces blakesleeanus.
(15) Descriptions and illustrations of both the zygosporic and sporangial states are presented.
(16) Almost all of the heat-tolerant isolates were pathogenic to suckling mice and had smooth or undulate, or smooth plus undulate zygospore walls.
(17) Although zygospore (mature zygote) formation in P. blakeslleeanus occurs in liquid glucoseglutamate medium, morphological observations are made more easily when cultures are grown on 1-mm-thick agar medium.