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Basidiomycota: Characteristics and Life Cycle

Explore the general characters of Basidiomycota, including basidiospores reproduction, dolipore septum, and more. Learn about the unique features of rust fungi and smut fungi, along with their role as parasites and saprophytes. Discover the complex life cycle of Puccinia and how it causes rust diseases. Find out about fungicide applications for plant health management against rust infections.

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Basidiomycota: Characteristics and Life Cycle

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  1. Phylum :Basidiomycota. • General characters: • The sexual reproduction produce basidiospores. • No flagellate cells are present. • Dikaryotic phase long dikaryotic mycelium. (may have clamp connection). • Presence of dolipore septum • (septated mycelium).

  2. 5.Basidiomycota: parasites rust fungi smut fungi Saprophytes. 6. Cell wall contain high amount of chitin. 7. Forming marcroscopic fruiting bodies. 8. Asexual reproduction by conidia,chlamdospores

  3. The dolipare septum: Found in all basidiomycota except the rust fungi It consist of central preforated swelling over which there is a pore cap The dolipare septum regulates the passage of nuclei and organelles from one cell to another by opining and closing

  4. The clamp connection: Found in all dikaryotic mycelia of basidiomycota except for most uredinomycetes

  5. The basidium: The basidium is the organ in which karyogamy and meiosis take place, result in formation of 4basidiospores externally on the basidium. Types of basidia phragmobasidium holiobasidium teliobasidium

  6. Diplodization or dikaryotization: Is the process in which a primary mycelium converted into secondary myclium.

  7. *Life cycle of the basidiomycetes:

  8. Puccinia

  9. Class:Urediniomycetes General characters: • The mycelium has no clamp connection or dolipore septum. • Obligate parasites causing rust disease. • Heteroeious( require two different species of plant host to complete life cycle). • Heterothalic(have two diffrenet mating types -.+). • Sexual reproduction takes place by spermatization between spermatia and receptive hypae. • Life cycle is very complex.

  10. Puccinia : Causing rust disease. • Plant Health Management Fungicide Application: The list of compounds labeled for rust control includes: chlorothalonil, chlorothalonil + fenarimol, chlorothalonil + thiophanate-methyl, cyproconazole, mancozeb, thiophanate-methyl + mancozeb, propiconazole, triadimefon, and thiram + triadimefon.

  11. ustilago zeae ustilago tritici

  12. ustilago tritici ustilago zeae

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