An oospore is a thick-walled sexual spore that develops from a fertilized oosphere in some algae, fungi, and oomycetes. They are believed to have evolved...

or bryophytes is an oosphere. When fertilized, the oosphere becomes the oospore.[clarification needed] When egg and sperm fuse during fertilisation, a...

mycelium. Show centric nuclear division. Perfect state of spores is typically oospores. Fungus-like organisms Wikispecies has information related to Mastigomycotina...

thickened hard wall to form an oospore that awaits favorable conditions for germination. Upon germination the diploid oospore undergoes meiosis, producing...

nucleus and enters a resting stage as a diploid, thick-walled oospore. The germinating oospore undergoes mitosis and gives rise to diploid hyphae which reproduce...

and can reproduce both sexually and asexually. Sexual reproduction of an oospore is the result of contact between hyphae of male antheridia and female oogonia;...

a heterothallic oomycete that overwinters as oospores in leaf litter and soil. In the spring, oospores germinate to produce macrosporangia, which under...

proximal (lower) half of the oogonium (paragyny), and the union producing oospores. Like animals, but not like most true fungi, meiosis is gametic, and somatic...

Oospores of Phytophthora agathidicida...

and fuse with the oosphere's haploid nucleus forming a diploid oospore. The oospore is then ready to germinate and develop into an adult diploid somatic...

fuse together via fertilization tubes. The zygote produced is named an oospore. Saprolegnia is generally a secondary pathogen, though in the right circumstances...

various plants. It has a spherical oogonium up to 25 μm in diameter, with an oospore that almost fills the oogonium. Sparrow FJ. (1960). Aquatic Phycomycetes...

type interact in host tissue. This interaction leads to the formation of oospores that can survive for long periods in or outside the host. Phytophthora...

basionym Pythium were consistently known to be homothallic. Additionally, oospores have been shown to occur only in specific pairings of certain sporangial...

gametes. Once fertilized, the zygote either becomes an encysted or motile oospore, which ultimately becomes a resting spore that will later germinate and...

coenocytic hyphae without septations. Oogonia Generally contain a single oospore. Antheridia Contain an elongated and club-shaped antheridium. Pythium-induced...

of mammals. Apomixis can apparently occur in Phytophthora, an oomycete. Oospores from an experimental cross were germinated, and some of the progeny were...

class. Peronosclerospora sorghi infects susceptible plants though sexual oospores, which survive in the soil, and asexual sporangia which are disseminated...

Phytophthora cactorum can be identified by examining oogonia, antheridium, oospore, and sporangia structure. Pythium ultimum P. ultimum requires moist conditions...

slightly longer than the oospore. The species is monoecious and richly fertile oogonia are situated above the antheridia. The oospore is dark brown or black...

Phytophthora. It has been licensed as a biocontrol agent in the form of an oospore soil treatment, which reduces pathogen load and concomitant plant disease...

overwintering oospores mainly serving as the primary inoculum. This primarily occurs by the use of oospore encrusted seeds for planting. Oospores, and sometimes...

during wet and humid conditions. This oomycete penetrates the roots through oospores and infects the leaves as conidia in a secondary infection. The fungus...

components. Propagules such as conidia, blastospores, chlamydospores, oospores, and zygospores have been evaluated, along with hydrolytic enzyme mixtures...

an oospore is produced. Oospores are resting structures that allow the pathogen to overwinter in the soil. Once the oospore is formed, the oospore will...

reducing photosynthetic activity, yield, and quality. The fungus spreads by oospores on diseased leaves and/or on infected seed. The disease spreads in environments...

mildew. P. halstedii originated in North America. Plasmopara halstedii oospores produce a thin wall which are resistant structures, sexually produced that...

Hormonal communication triggers the formation of the sexual spores, called oospores. The different types of spores play major roles in the dissemination and...

are visible. The primary survival structures of pythium are oospores and sporangia. Oospores and sporangia are circular in shape. Antheridia and oogonia...

Both flagella are inserted laterally. Thick-walled sexual spores, called oospores are produced which germinate, producing either vesicles inside the plant...