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Like other Puccinia species, P. graminis is an obligate biotroph (it colonizes living plant cells) and has a complex life cycle [27] featuring alternation of generations. The fungus is heteroecious , requiring two hosts to complete its life cycle – the cereal host and the alternate host . [ 2 ]
The Puccinia species causing wheat leaf rust has been called by at least six different names since 1882, when G. Winter (1882) described the Puccinia rubigo-vera. [5] During this time, wheat leaf rust was interpreted as a specialized form of P. rubigo-vera. Later, Eriksson and Henning (1894) classified the fungi as P. dispersa f.sp. tritici.
The life cycle of Puccinia graminis f. sp. tritici, commonly called stem rust of wheat, is notoriously complex, with five types of spores (macrocyclic) and two distinct host plants (heteroecious). This fungus is an obligate biotrophic (feeding on the living plant tissue) pathogen of cereal crops that can cause extensive yield loss (Schumann and ...
Puccinia is a genus of fungi.All species in this genus are obligate plant pathogens and are known as rusts. [1] The genus contains about 4000 species. [2]The genus name of Puccinia is in honour of Tommaso Puccini (died 1735), who was an Italian doctor and botanist who taught anatomy at Hospital of Santa Maria Nuova in Florence.
Yellow rust distribution in winter triticale. Wheat yellow rust (Puccinia striiformis f.sp. tritici), also known as wheat stripe rust, is one of the three major wheat rust diseases, along with stem rust of wheat (Puccinia graminis f.sp. tritici) and leaf rust (Puccinia triticina f.sp. tritici).
Germinating urediniospore of Puccinia graminis, model from the late 19th century, Botanical Museum Greifswald. Rust fungi can produce up to five spore types from corresponding fruiting body types during their life cycle, depending on the species. Roman numerals have traditionally been used to refer to these morphological types.
Newton identified physiologically distinct races of Puccinia graminis and focused on determining their genetic structure, [7] physiology, [2] origin, and life cycle. [9] [16] She investigated stripe rust on wheat and barley and wheat leaf rust, and the environmental factors on disease expression in wheat plants. [9]
Ug99 is a lineage of wheat stem rust (Puccinia graminis f. sp. tritici), which is present in wheat fields in several countries in Africa and the Middle East and is predicted to spread rapidly through these regions and possibly further afield, potentially causing a wheat production disaster that would affect food security worldwide. [1]