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Wang Y, Song X, Xie S, Geng Y, Xu C, Yin X, Zang R, Guo L, Zhang M, Guo Y. Diversity of Lasiodiplodia Species Associated with Canker and Dieback in Fruit Trees in the Henan and Shandong Provinces of China. PLANT DISEASE 2024; 108:563-575. [PMID: 37729652 DOI: 10.1094/pdis-07-23-1260-sr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Lasiodiplodia is a widely distributed genus that is associated with a variety of diseases in many plant species, especially fruit trees. In this study, a disease survey of fruit trees growing in 12 orchards located in the Henan and Shandong provinces of China was conducted between 2020 and 2022. The symptoms observed included stem canker, branch dieback, and gummosis. Phylogenetic analyses of internal transcribed spacer, tub2, tef1, and rpb2 sequence data combined with morphological characteristics revealed that the 19 isolates collected during the survey belonged to five documented Lasiodiplodia species, namely, Lasiodiplodia citricola, L. chiangraiensis, L. huangyanensis, L. pseudotheobromae, and L. theobromae, and two previously undescribed species, L. xinyangensis and L. ziziphi. In addition, the survey identified three novel host-pathogen interactions: L. chiangraiensis on loquat, L. citricola on apple, and L. huangyanensis on grapevine. Furthermore, the detailed phylogenic analysis indicated that four previously described Lasiodiplodia species were genetically very closely related that they would be better classified as synonyms rather than distinct species, so L. paraphysoides and L. nanpingensis should be considered synonyms of L. citricola, L. fujianensis should be a synonym of L. iraniensis, and L. henanica should be a synonym of L. huangyanensis. Pathogenicity tests confirmed that representative isolates of the two novel species and three new host-pathogen interactions identified in the current study were pathogenic to their original hosts, thereby fulfilling Koch's postulates. Similarly, all of the isolates were found to be pathogenic on four alternative hosts, although a high degree of variation in virulence was observed.
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Affiliation(s)
- Yanfen Wang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
- School of Resources and Environment, Henan Institute of Science and Technology, Xinxiang 453003, China
| | - Xinzheng Song
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Shunpei Xie
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Yuehua Geng
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Chao Xu
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Xinming Yin
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Rui Zang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Lihua Guo
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Beijing 100193, China
| | - Meng Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
| | - Yashuang Guo
- College of Plant Protection, Henan Agricultural University, Zhengzhou 450002, China
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Wang Y, Xie S, Cao J, Zhao H, Yin X, Guo Y, Xu C, Guo L, Wu H, Zhang M. Lasiodiplodia regiae sp. nov.: A New Species Causing Canker and Dieback of Fruit Trees in China. PHYTOPATHOLOGY 2023; 113:1210-1221. [PMID: 36657140 DOI: 10.1094/phyto-06-22-0231-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Canker and dieback are serious fungal diseases of woody plants that can cause huge economic losses to orchards. The purpose of this study was to classify and assess the pathogenicity of fungal species associated with canker and dieback on fruit trees growing in Henan Province, China. In total, 150 isolates of Botryosphaeriaceae were obtained from six different fruit trees exhibiting typical symptoms of stem canker, branch dieback, and gummosis. Morphological examinations and phylogenetic analysis of ITS, tef1, tub2, and rpb2 revealed two Botryosphaeriaceae species, which are Botryosphaeria dothidea and a novel species, Lasiodiplodia regiae, respectively. Using Koch's postulates, we confirmed that the different isolates of L. regiae can cause disease in their original hosts. The pathogenicity tests showed that L. regiae can cause canker, dieback, and gummosis symptoms in four different hosts, indicating a relatively wider host range. Moreover, 10 L. regiae isolates exhibited similar symptoms but different levels of virulence on shoots of peach trees under field conditions. This study demonstrated that L. regiae was a new causal agent of canker and dieback of six fruit tree species, which could be a serious risk to the orchard industry in China. Furthermore, the findings provide a foundation for further epidemiological studies and the development of management strategies.
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Affiliation(s)
- Yanfen Wang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Shunpei Xie
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jiayuan Cao
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Hang Zhao
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xinming Yin
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Yashuang Guo
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Chao Xu
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
| | - Lihua Guo
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Beijing, 100193, China
| | - Haiyan Wu
- Analytical Instrument Center, Henan Agricultural University Henan Agricultural University, Zhengzhou, 450002, China
| | - Meng Zhang
- College of Plant Protection, Henan Agricultural University, Zhengzhou, 450002, China
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Beijing, 100193, China
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El-Ganainy SM, Ismail AM, Iqbal Z, Elshewy ES, Alhudaib KA, Almaghasla MI, Magistà D. Diversity among Lasiodiplodia Species Causing Dieback, Root Rot and Leaf Spot on Fruit Trees in Egypt, and a Description of Lasiodiplodia newvalleyensis sp. nov. J Fungi (Basel) 2022; 8:jof8111203. [PMID: 36422024 PMCID: PMC9694705 DOI: 10.3390/jof8111203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/26/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
Lasiodiplodia (family Botryosphaeriaceae) is a widely distributed fungal genus that causes a variety of diseases in tropical and subtropical regions. During 2020−2021, a routine survey of fruit tree plants was conducted in five Egyptian Governorates, and fresh samples exhibiting dieback, decline, leaf spot and root rot symptoms were collected. Collection from eight different symptomatic leaves, twigs, branches and roots of fruit trees yielded 18 Lasiodiplodia-like isolates. The sequencing data from the internal transcribed spacer region (ITS), partial translation elongation factor 1-alpha (tef1-a) and β-tubulin (tub2) were used to infer phylogenetic relationships with known Lasiodiplodia species. Two isolates obtained from black necrotic lesions on Phoenix dactylifera leaves were identified as a putative novel species, L. newvalleyensis sp. nov., and were thus subjected to further morphological characterization. The results of isolation and molecular characterization revealed that L. theobromae (n = 9) was the most common species on Mangifera indica, Citrus reticulata, C. sinensis, Ficus carica, Prunus persica, Prunus armeniaca and Pyrus communis trees. Lasiodiplodia pseudotheobromae (n = 5) was isolated from M. indica, Prunus persica and C. sinensis. Lasiodiplodia laeliocattleyae (n = 2) was isolated from C. reticulata. Pathogenicity test results suggested that all Lasiodiplodia species were pathogenic to their hosts. The present study is considered the first to characterize and decipher the diversity of Lasiodiplodia species associated with fruit trees in Egypt, using the multi-locus ITS, tef1-a and tub2 sequence data, along with morphological and pathogenic trials. To our knowledge, this is the first report of L. newvalleyensis on Phoenix dactylifera and L. laeliocattleya on C. reticulata in Egypt and worldwide.
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Affiliation(s)
- Sherif Mohamed El-Ganainy
- Department of Arid Land Agriculture, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Plant Pests, and Diseases Unit, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Vegetable Diseases Research Department, Plant Pathology Research Institute, Agricultural Research Center (ARC), Giza 12619, Egypt
- Correspondence: (S.M.E.-G.); (A.M.I.)
| | - Ahmed Mahmoud Ismail
- Department of Arid Land Agriculture, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Plant Pests, and Diseases Unit, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Vegetable Diseases Research Department, Plant Pathology Research Institute, Agricultural Research Center (ARC), Giza 12619, Egypt
- Correspondence: (S.M.E.-G.); (A.M.I.)
| | - Zafar Iqbal
- Central Laboratories, King Faisal University, Riyadh 11451, Saudi Arabia
| | - Eman Said Elshewy
- Vegetable Diseases Research Department, Plant Pathology Research Institute, Agricultural Research Center (ARC), Giza 12619, Egypt
| | - Khalid A. Alhudaib
- Department of Arid Land Agriculture, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Plant Pests, and Diseases Unit, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
| | - Mustafa I. Almaghasla
- Department of Arid Land Agriculture, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
- Plant Pests, and Diseases Unit, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia
| | - Donato Magistà
- Department of Soil, Plant and Food Sciences, University of Bari A. Moro, 70126 Bari, Italy
- Institute of Sciences of Food Production (ISPA), National Research Council (CNR), 70126 Bari, Italy
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Qiao G, Zhao J, Liu J, Tan X, Qin W. Two Novel Lasiodiplodia Species from Blighted Stems of Acer truncatum and Cotinus coggygria in China. BIOLOGY 2022; 11:biology11101459. [PMID: 36290363 PMCID: PMC9598536 DOI: 10.3390/biology11101459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/28/2022] [Accepted: 09/29/2022] [Indexed: 12/04/2022]
Abstract
The Lasiodiplodia are major pathogens or endophytes living on a wide range of plant hosts in tropical and subtropical regions, which can cause stem canker, shoot blight, and rotting of fruits and roots. During an exploration of the stem diseases on Acer truncatum and Cotinus coggygria in northern China, two novel species of Lasiodiplodia, L. acerina G.H. Qiao & W.T. Qin and L. cotini G.H. Qiao & W.T. Qin, were discovered based on integrated studies of the morphological characteristics and phylogenetic analyses of the internal transcribed spacer region (ITS), translation elongation factor 1-α (TEF1-α), beta-tubulin (TUB2) and RNA polymerase II subunit b genes (RPB2). Lasiodiplodia acerina is a sister taxon of L. henannica and distinguishable by smaller paraphysis and larger conidiomata. Lasiodiplodia cotini is closely related to L. citricola but differs in the sequence data and the size of paraphyses. Distinctions between the two novel species and their close relatives were compared and discussed in details. This study updates the knowledge of species diversity of the genus Lasiodiplodia. Furthermore, this is the first report of Lasiodiplodia associated with blighted stems of A. truncatum and C. coggygria in China.
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Affiliation(s)
- Guanghang Qiao
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (G.Q.); (J.Z.); (J.L.); (X.T.)
| | - Juan Zhao
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (G.Q.); (J.Z.); (J.L.); (X.T.)
| | - Juanjuan Liu
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (G.Q.); (J.Z.); (J.L.); (X.T.)
- College of Forestry, Beijing Forestry University, Beijing 100083, China
| | - Xiaoqian Tan
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (G.Q.); (J.Z.); (J.L.); (X.T.)
- College of Life Sciences, Yangtze University, Jingzhou 434025, China
| | - Wentao Qin
- Institute of Plant Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China; (G.Q.); (J.Z.); (J.L.); (X.T.)
- Correspondence:
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Suwannarach N, Khuna S, Kumla J, Cheewangkoon R, Suttiprapan P, Lumyong S. Morphology Characterization, Molecular Identification, and Pathogenicity of Fungal Pathogen Causing Kaffir Lime Leaf Blight in Northern Thailand. PLANTS (BASEL, SWITZERLAND) 2022; 11:273. [PMID: 35161253 PMCID: PMC8838810 DOI: 10.3390/plants11030273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/10/2022] [Accepted: 01/18/2022] [Indexed: 06/14/2023]
Abstract
Thailand is known to be the largest producer of kaffir lime leaf products in the global market. In 2021, leaf blight was found on kaffir lime plants (Citrus hystrix DC.) in Lamphun Province of northern Thailand. This disease has been associated with significant economic losses. However, there have been no prior reports of leaf blight on kaffir lime plants in Thailand or anywhere else in the world. In this study, causal fungi were isolated from lesions of kaffir lime plants and a total of three fungal isolates were obtained. All causal fungi were identified as Lasiodiplodia chinensis based on morphological characteristics and the phylogenetic analysis of combined sequences of the internal transcribed spacer (ITS) of ribosomal DNA, the translation elongation factor 1-alpha (tef-1), β-tubulin (tub), and RNA polymerase II subunit (rbp2) genes. Pathogenicity tests were conducted and the results revealed that all isolated fungi caused symptoms of leaf blight on inoculated leaves. This outcome was similar to symptoms that naturally occur and have been observed in the field. This is the first report on kaffir lime leaf blight caused by L. chinensis. Our study will provide information of high value for the development of effective strategies for the monitoring and prevention of this disease.
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Affiliation(s)
- Nakarin Suwannarach
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; (S.K.); (J.K.); (R.C.); (P.S.); (S.L.)
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Surapong Khuna
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; (S.K.); (J.K.); (R.C.); (P.S.); (S.L.)
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jaturong Kumla
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; (S.K.); (J.K.); (R.C.); (P.S.); (S.L.)
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Ratchadawan Cheewangkoon
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; (S.K.); (J.K.); (R.C.); (P.S.); (S.L.)
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Piyawan Suttiprapan
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; (S.K.); (J.K.); (R.C.); (P.S.); (S.L.)
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Saisamorn Lumyong
- Research Center of Microbial Diversity and Sustainable Utilization, Chiang Mai University, Chiang Mai 50200, Thailand; (S.K.); (J.K.); (R.C.); (P.S.); (S.L.)
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
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