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Bradshaw M, Braun U, Quijada L, Pfister DH. Phylogeny and taxonomy of the genera of Erysiphaceae, part 5: Erysiphe (the " Microsphaera lineage" part 1). Mycologia 2024; 116:106-147. [PMID: 37955985 DOI: 10.1080/00275514.2023.2252715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 08/24/2023] [Indexed: 11/15/2023]
Abstract
In this contribution, we offer the fifth installment of a series focusing on the phylogeny and taxonomy of powdery mildews. This paper is the second segment evaluating the genus Erysiphe. The first treatment of Erysiphe focused on phylogenetically basal species in the "Uncinula lineage." This research presents a phylogenetic-taxonomic assessment of species that form the group previously referred to as the "Microsphaera lineage." Given the size of the group, we split the treatment of this lineage of Erysiphe species into two parts based on their phylogenetic placement. Phylogenetic trees based on ITS+28S data are supplemented by sequences of additional markers (CAM, GADPH, GS, RPB2, and TUB). Included in the analysis of the Microsphaera lineage is the "Erysiphe aquilegiae complex" (group, clade, cluster), which encompasses sequences obtained from an assemblage of Erysiphe species with insufficient resolution in rDNA analyses. Attempts have been made to resolve this group at the species level by applying a multilocus approach. A detailed discussion of the "Erysiphe aquilegiae complex" is provided. Sequences are provided for the first time for several species, particularly North American species, such as Erysiphe aggregata, E. erineophila, E. parnassiae, and E. semitosta. Ex-type sequences for Microsphaera benzoin and M. magnusii have been retrieved. Alphitomorpha penicillata, Microsphaera vanbruntiana, and M. symphoricarpi are epitypified with ex-epitype sequences. The new species Erysiphe alnicola, E. deutziana, E. cornigena, E. lentaginis, and E. sambucina are described, the new combinations E. lauracearum, E. passiflorae, and E. sambucicola are introduced, and the new name E. santali is proposed.
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Affiliation(s)
- Michael Bradshaw
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina
- Farlow Herbarium, Department of Organismic and Evolutionary Biology, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138
| | - Uwe Braun
- Department of Geobotany and Botanical Garden, Herbarium, Institute of Biology, Martin Luther University, Neuwerk 21, Halle (Saale) 06099, Germany
| | - Luis Quijada
- Farlow Herbarium, Department of Organismic and Evolutionary Biology, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138
- Departamento de Botánica, Ecología y Fisiología Vegetal, Universidad de La Laguna, Avenida Astrofísico Francisco Sánchez, s/n, Facultad de Farmacia, Apartado 456, Código postal 38200, San Cristóbal de La Laguna, S/C de Tenerife, Canary Islands, Spain
| | - Donald H Pfister
- Farlow Herbarium, Department of Organismic and Evolutionary Biology, Harvard University, 22 Divinity Avenue, Cambridge, Massachusetts 02138
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Deng D, Sun S, Wu W, Duan C, Wang Z, Zhang S, Zhu Z. Identification of Causal Agent Inciting Powdery Mildew on Common Bean and Screening of Resistance Cultivars. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11070874. [PMID: 35406856 PMCID: PMC9003302 DOI: 10.3390/plants11070874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/11/2022] [Accepted: 03/18/2022] [Indexed: 05/17/2023]
Abstract
Powdery mildew is one of the severe diseases on common bean in Southwestern China, but the identity of the pathogen inciting this disease is unclear. The objective of this study was to identify the causal agent of common bean powdery mildew and to screen resistant cultivars. The pathogen was identified through morphological identification, molecular phylogenetic analysis, and pathogenicity tests. Resistance of common bean cultivars was evaluated by artificial inoculation at the seedling stage. The common bean powdery mildew isolate CBPM1 was obtained after pathogen isolation and purification. Morphological identification confirmed that the isolate CBPM1 belonged to the Oidium subgenus Pseudoidium and germinated Pseudoidium-type germ tubes. Molecular phylogenetic analysis showed that the isolate CBPM1 and Erysiphe vignae isolates from different hosts were clustered into a distinct group. The pathogenicity and host range tests revealed that the isolate CBPM1 was strongly pathogenic to common bean, multiflora bean, lablab bean, cowpea, and mung bean, but not to soybean, adzuki bean, pea, faba bean, chickpea, lentil, pumpkin, and cucumber. In addition, 54 common bean cultivars were identified for resistance to powdery mildew, and 15 were resistant or segregant. Based on the morphological, molecular and pathogenic characteristics, the causal agent of common bean powdery mildew was identified as E. vignae. This is the first time E. vignae has been confirmed on common bean. Cultivars with different resistance levels were screened, and these cultivars could be used for disease control or the breeding of new resistant cultivars.
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Affiliation(s)
- Dong Deng
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (D.D.); (W.W.); (C.D.)
| | - Suli Sun
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (D.D.); (W.W.); (C.D.)
- Correspondence: (S.S.); (Z.Z.); Tel.: +86-10-82109609 (Z.Z.); Fax: +86-10-82109608 (Z.Z.)
| | - Wenqi Wu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (D.D.); (W.W.); (C.D.)
| | - Canxing Duan
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (D.D.); (W.W.); (C.D.)
| | - Zhaoli Wang
- Coarse Cereal Unit, Bijie Academy of Agricultural Sciences, Bijie 551700, China; (Z.W.); (S.Z.)
| | - Shilong Zhang
- Coarse Cereal Unit, Bijie Academy of Agricultural Sciences, Bijie 551700, China; (Z.W.); (S.Z.)
| | - Zhendong Zhu
- Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (D.D.); (W.W.); (C.D.)
- Correspondence: (S.S.); (Z.Z.); Tel.: +86-10-82109609 (Z.Z.); Fax: +86-10-82109608 (Z.Z.)
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Kelly LA, Vaghefi N, Bransgrove K, Fechner NA, Stuart K, Pandey AK, Sharma M, Németh MZ, Liu SY, Tang SR, Nair RM, Douglas CA, Kiss L. One Crop Disease, How Many Pathogens? Podosphaera xanthii and Erysiphe vignae sp. nov. Identified as the Two Species that Cause Powdery Mildew of Mungbean ( Vigna radiata) and Black Gram ( V. mungo) in Australia. PHYTOPATHOLOGY 2021; 111:1193-1206. [PMID: 33487024 DOI: 10.1094/phyto-12-20-0554-r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Powdery mildew is a significant threat to mungbean (Vigna radiata) and black gram (V. mungo) production across Australia and overseas. Although they have been present in Australia for at least six decades and are easily recognized in the field, the precise identification of the pathogens causing this disease has remained unclear. Our goal was to identify the powdery mildew species infecting mungbean, black gram, and wild mungbean (V. radiata ssp. sublobata) in Australia. The internal transcribed spacer (ITS) and large subunit sequences of the ribosomal DNA and/or morphology of 57 Australian specimens were examined. Mungbean and black gram were infected by two species: Podosphaera xanthii and a newly recognized taxon, Erysiphe vignae sp. nov. Wild mungbean was infected only with P. xanthii. Mungbean and black gram powdery mildew ITS sequences from China, India, and Taiwan revealed the presence of only P. xanthii on these crops despite controversial reports of an Erysiphe species on both crops in India. Sequence analyses indicated that the closest relative of E. vignae is E. diffusa, which infects soybean (Glycine max) and other plants. E. vignae did not infect soybean in cross-inoculation tests. In turn, E. diffusa from soybean infected black gram and provoked hypersensitive response in mungbean. The recognition of a second species, E. vignae, as another causal agent of mungbean and black gram powdery mildew in Australia may complicate plant breeding efforts and control of the disease with fungicide applications.
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Affiliation(s)
- Lisa A Kelly
- University of Southern Queensland, Centre for Crop Health, QLD 4350 Toowoomba, Australia
- Queensland Government, Department of Agriculture and Fisheries, QLD 4350 Toowoomba, Australia
| | - Niloofar Vaghefi
- University of Southern Queensland, Centre for Crop Health, QLD 4350 Toowoomba, Australia
| | - Kaylene Bransgrove
- Queensland Plant Pathology Herbarium, Department of Agriculture and Fisheries, QLD 4102 Dutton Park, Australia
| | - Nigel A Fechner
- Queensland Government, Department of Environment and Science, Queensland Herbarium, Mt. Coot-tha Botanic Gardens, QLD 4066 Toowong, Australia
| | - Kara Stuart
- Biosecurity Queensland, Department of Agriculture and Fisheries, QLD 4102 Dutton Park, Australia
| | - Abhay K Pandey
- World Vegetable Center, South Asia, ICRISAT Campus, Patancheru, Hyderabad 502324, India
| | - Mamta Sharma
- International Crops Research Institute for the Semi-Arid Tropics, Hyderabad 502324, India
| | - Márk Z Németh
- Plant Protection Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, H-1525 Budapest, Hungary
| | - Shu-Yan Liu
- Jilin Agricultural University, College of Plant Protection, Changchun 130118, Jilin Province, China
| | - Shu-Rong Tang
- Jilin Agricultural University, College of Plant Protection, Changchun 130118, Jilin Province, China
| | - Ramakrishnan M Nair
- World Vegetable Center, South Asia, ICRISAT Campus, Patancheru, Hyderabad 502324, India
| | - Colin A Douglas
- Queensland Government, Department of Agriculture and Fisheries, QLD 4370 Warwick, Australia
| | - Levente Kiss
- University of Southern Queensland, Centre for Crop Health, QLD 4350 Toowoomba, Australia
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