Pucciniomycotina
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Detail description about subphylum puccinomycotina and described in detailed manner, will be easy to understand in simple format
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Pucciniomycotina
- 1. PUCCINIOMYCOTINA N.H. SHANKAR REDDY 2nd Ph.D. Plant Pathology Annamalai University
- 3. Puccinia graminis • Obligate parasite • Wheat – Primary host • Barberry – Secondary host
- 4. Life cycle of wheat stem rust – Puccinia graminis tritici Systemic position Kingdom – Fungi Class – Pucciniomycetes Order – Pucciniales Family – Pucciniaceae Genus – Puccinia Species - graminis
- 5. Symptoms – Orange to red colour nlister like pastules appers on the surface of leaf and stems
- 6. Stage Spores Colour Appearance O Pycniospores Hyaline Upper I Aeciospores Yellow Lower II Uredospores Golden brown Primary host III Teliospores Black Primary host IV Basidiospores Hyaline Soil debris
- 7. Life cycle When wheat crop attains maturity the uredinia appears on rut pustules and developed as urediniospores, these are single celled, which contains enormous amount of food reserves for long distance dissemination, at the end of the wheat season it starts to produce less urediniospores and more teiospores
- 8. Telia are black, elongated, bi-celled, dark brown in colour, it is a resting spore which represents sexual apparatus of the fungus in which karyogamy ad meiosis takes place, when favourable conditions occurs its germinate and produce basidispores of opposite mating types
- 9. Types of teliospores Types of teliospore Example Single celled teliospore Uromyces Double celled teliospore Puccinia Multicelled teliopsore Phragmidium Durnip shaped uredospore Hemileia Kidney shaped teliospore Crust like telispore Melampsora Parachute like teliospore Ravenelia
- 10. Basidiospores infect barberry but not wheat, several basidiospores produce flask shaped pycnium. Several pycnia of opposite mating types are generally formed in the same leaf. On the corresponding to the lower surface it produce aecia
- 11. Aeciospores it contains reserve food material, the aeciopsores can’t germinate on berberry and germinate on wheat leaf.
- 13. Types of rust Autoecious rust – Completes its entire life cycle in a single host Heteroecious rust - Requires genetically two hosts to complete their life cycle Autoecious macrocyclic rust – Eg – B – Bean rust F – Flax rust S - Sunflower rust S - Safflower rust Autoecious demicyclic rust – Eg – Rubus orange rust – Gymnoconia peckiana Heteroecious macrocyclic – Eg – Wheat stem rust – Puccinia graminis tritici White pine blister blight – Cronartium rubicola Heteroecious demicyclic – Eg – Cedar apple rust – Gymnosporangium juniperi Viriginianae
- 14. Melamsporaceae Flax seed rust – Melampsora lini
- 15. Coffee rust – Hemileia vastatrix
- 17. Difference between three wheat rusts (wheat stem rust, leaf rust and stripe rust)