![]() Recent investigations into the ability of B. cinerea is widely utilized as a chief model organism for understanding plant-pathogen interactions such as the evolution of necrotrophy 5 and host-specificity 6, and the flexibility of plant pathogen lifestyles 7. The importance of Botrytis extends beyond the agricultural field. ![]() Botrytis species are present in all major agricultural production regions of the world and cause significant pre- and post-harvest losses, supporting a multi-million dollar Botrytis pest management industry. This species can also be found infecting plants in remote locations from Hawaii 2 to the Canary Islands 3, and has even been recorded from environmental samples in Antarctica 4, making the influence of this pathogen truly global. cinerea alone has been documented to cause disease on 586 genera 1. Many of these species putatively infect only a restricted range of host plant species, however, the polyphagous B. Similar content being viewed by othersįungi in genus Botrytis are economically-important agricultural plant pathogens that collectively infect nearly 600 diverse plant genera comprising 170 monocotyledonous and dicotyledonous plant families 1. Selected pathogenicity, growth, and morphological characteristics of the putatively new Botrytis species were also assessed to provide a basis for future formal description of the isolates as new species. ![]() Lastly, some isolates found on peony share sequence similarity with unnamed species found living as endophytes in weedy hosts, suggesting that the isolates found on peony have flexible lifestyles as recently discovered in the genus. Furthermore, species were found on peonies in Alaska that have been described on other host plants in different parts of the world, indicating a wider geographic and host distribution than previously thought. Together, up to 16 different phylogenetic species were found in association with peonies in the Pacific Northwest, which is over a third of the total number of species that are currently named. In this study, surveys and subsequent genetic analysis of the glyceraldehyde-3-phosate dehydrogenase ( G3PDH), heat-shock protein 60 ( HSP60), DNA-dependent RNA polymerase subunit II ( RPB2), and necrosis and ethylene-inducing proteins 1 and 2 ( NEP1 and NEP2) genes indicated that Botrytis isolates collected from peony fields in the United States contained more species diversity than ever before reported on a single host, including up to 10 potentially novel species. Recent efforts to genetically characterize genus Botrytis have revealed new species on diverse host crops around the world. Genus Botrytis contains approximately 35 species, many of which are economically-important and globally-distributed plant pathogens which collectively infect over 1,400 plant species.
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