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Teliospore (sometimes called teleutospore) is the thick-walled resting spore of some fungi (rusts and smuts), from which the basidium arises. Development [ edit ]
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The characteristic part of the life-cycle of smuts is the thick-walled, often darkly pigmented, ornate, teliospore that serves to survive harsh conditions such as overwintering and also serves to help disperse the fungus as dry diaspores. The teliospores are initially dikaryotic but become diploid via karyogamy.
An iron- and phosphorus-rich neck band bridges the plant and fungal membranes in the space between the cells for water flow, known as the apoplast, thus preventing the nutrients reaching the plant's cells.
Hemileia ' s life cycle begins with the germination of uredospores through germ pores in the spore. It mainly attacks the leaves and is only rarely found on young stems and fruit. Appressoria are produced, which in turn produce vesicles, from which entry into the substomatal cavity is gained. Within 24–48 hours, infection is completed.
The parasitic phase involves karyogamy, the process of fusing two haploid nuclei (present in haploid teliospore cells), followed by meiosis. [6] Each meiosis results in a septated basidium bearing four haploid basidiospores which can then proceed to yeast-like growth. During meiosis, genes are expressed that function in recombination and DNA ...
Uredospores are the only infectious spores of Puccinia melanocephala. The uredospores disperse from the pustules via wind or rain onto the leaves of a new host sugarcane plant. [5] The uredospores then germinate on the sugarcane leaves, develop appresoria, and infect the new host plant via penetration of the plant's stomata. This cycle can be ...
Bauer et al. speculated that the teliospore tetrad in entorrhizomycetes might represent the ancestral state of dikaryan meiosporangia. This is based on the observation that the septa in the tetrads have pores, and that the tetrad compartments germinate into hyphae terminating in propagules.