Puccinia sorghi — LLMpedia

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Puccinia sorghi is a fungal pathogen causing common rust of maize, with significant implications for agriculture and plant pathology. First described in the 19th century, it has been studied by researchers associated with institutions such as United States Department of Agriculture, Iowa State University, University of Wisconsin–Madison, International Maize and Wheat Improvement Center, and CIMMYT. Its biology and management intersect with research programs at National Institute of Agricultural Botany, Deutsche Forschungsgemeinschaft, Royal Society, and plant health agencies including Food and Agriculture Organization initiatives.

Taxonomy and Description

Puccinia sorghi is classified within the order Pucciniales of the division Basidiomycota, and was historically treated in taxonomic works by mycologists associated with Royal Botanic Gardens, Kew, Smithsonian Institution, and contributors to the Index Fungorum. Morphologically, uredinia and telia structure were described in monographs linked to collections at New York Botanical Garden and Royal Botanic Garden Edinburgh. Descriptions in floras used by curators at Natural History Museum, London and researchers at California Academy of Sciences emphasize spore size, wall ornamentation, and sori arrangement, traits cataloged in databases maintained by Global Biodiversity Information Facility and MycoBank. Classical taxonomy revisions involved correspondence and specimen exchange with Botanischer Garten Berlin and academic journals like those published by Royal Society of London and Nature Publishing Group.

The macrocyclic, heteroecious life cycle involves five spore stages—urediniospores, teliospores, basidiospores, pycniospores, and aeciospores—paralleling descriptions in textbooks from Cambridge University Press and laboratory protocols at USDA Agricultural Research Service. Sexual recombination studies have been carried out in facilities linked to University of California, Davis and Cornell University, with genetics compared to model systems studied at Max Planck Society institutes. Alternate hosts in the genus Oxalis and related genera were investigated in herbarium exchanges with Kew Gardens and ecological surveys by teams from University of São Paulo and Academia Sinica. Molecular phylogenetics using methods standardized by programs at Wellcome Trust and sequencing platforms from European Molecular Biology Laboratory refined lineage placement and population structure analyses shared via repositories like GenBank.

Primary hosts include cultivated maize varieties studied in breeding programs at Iowa State University, UNAM, University of Pretoria, and National Agricultural Research Organization. Symptoms on leaves—raised orange-brown pustules producing urediniospores—were documented in extension publications by Penn State Extension, University of Minnesota Extension, and Texas A&M AgriLife Extension. Alternate host interactions with species of Oxalis and wild flora were recorded during field surveys coordinated by Smithsonian Tropical Research Institute and regional plant health offices such as Plant Health Australia. Diagnostic keys used in pathology labs at John Innes Centre and Rothamsted Research contrast lesions of Puccinia sorghi with those of other rusts reported in reviews from American Phytopathological Society.

Distribution records from collections and surveys show presence in North America, South America, Africa, Europe, and parts of Asia, compiled by networks including Global Rust Reference Center and regional plant protection organizations like European and Mediterranean Plant Protection Organization. Climatic influences described in studies produced by Intergovernmental Panel on Climate Change assessments and modeling groups at Stanford University and University of Cambridge link outbreaks to temperature and moisture patterns analyzed with tools developed at NASA and NOAA. Epidemiological fieldwork has been conducted in agroecosystems studied by researchers from Embrapa, AgResearch, and CSIRO.

Integrated strategies combining host resistance, fungicide applications, and cultural practices derive from extension guidance by USDA, Food and Agriculture Organization, and research from University of Illinois Urbana–Champaign and University of Nebraska–Lincoln. Breeding for resistance has involved collaborations with CIMMYT, International Institute of Tropical Agriculture, and national breeding programs in Mexico, Kenya, and India using germplasm evaluated in trials at International Center for Tropical Agriculture. Fungicide efficacy trials conducted by industry partners such as BASF, Syngenta, and research units at Bayer were published in journals associated with Wiley-Blackwell and Springer Nature. Cultural controls—crop rotation, residue management, and planting date adjustment—are recommended in manuals from Food and Agriculture Organization and national advisories like those from Ministry of Agriculture (India).

Yield losses attributed to Puccinia sorghi have been quantified in national statistics compiled by United States Department of Agriculture and international assessments by FAO and World Bank agricultural studies. Economic analyses in policy briefs by OECD and university extension reports from University of Missouri and Kansas State University have influenced subsidy and insurance schemes administered by agencies such as European Commission agricultural departments. The pathogen’s role in shaping breeding priorities is evident in funding initiatives by Bill & Melinda Gates Foundation, research consortia at CGIAR, and public–private partnerships involving Monsanto and academic centers like University of Florida.

Category:Pucciniales