2
|
Mayorquin JS, Nouri MT, Peacock BB, Trouillas FP, Douhan GW, Kallsen C, Eskalen A. Identification, Pathogenicity, and Spore Trapping of Colletotrichum karstii Associated with Twig and Shoot Dieback in California. PLANT DISEASE 2019; 103:1464-1473. [PMID: 30998450 DOI: 10.1094/pdis-08-18-1425-re] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Colletotrichum Corda, 1831 species are well-documented pathogens of citrus that are associated with leaf and fruit anthracnose diseases. However, their role in twig and shoot dieback diseases of citrus has recently become more prominent. Recent surveys of orchards in the Central Valley of California have revealed C. gloeosporioides and a previously undocumented species, C. karstii, to be associated with twig and shoot dieback. Pathogenicity tests using clementine (cv. 4B) indicated that both C. karstii and C. gloeosporioides are capable of producing lesions following inoculation of citrus stems. Pathogenicity tests also revealed C. karstii to be the most aggressive fungal species producing the longest lesions after 15 months. The majority of spores trapped during this study were trapped during or closely following a precipitation event with the majority of spores being trapped from January through May. These findings confirm C. karstii as a new pathogen of citrus in California.
Collapse
Affiliation(s)
- Joey S Mayorquin
- 1 Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521
| | - Mohamed T Nouri
- 2 Department of Plant Pathology, University of California, Davis, Kearney Agricultural Research and Extension Center, Parlier, CA 93648
| | - Beth B Peacock
- 1 Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521
| | - Florent P Trouillas
- 2 Department of Plant Pathology, University of California, Davis, Kearney Agricultural Research and Extension Center, Parlier, CA 93648
| | - Greg W Douhan
- 3 University of California Cooperative Extension, Tulare, CA 93274
| | - Craig Kallsen
- 4 University of California Cooperative Extension, Bakersfield, CA 93307; and
| | - Akif Eskalen
- 5 Department of Plant Pathology, University of California, Davis, CA 95616
| |
Collapse
|
3
|
Ma X, Nontachaiyapoom S, Jayawardena RS, yde KD, Gentekaki E, Zhou S, Qian Y, Wen T, Kang J. Endophytic Colletotrichum species from Dendrobium spp. in China and Northern Thailand. MycoKeys 2018; 43:23-57. [PMID: 30568535 PMCID: PMC6290043 DOI: 10.3897/mycokeys.43.25081] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 11/03/2018] [Indexed: 11/17/2022] Open
Abstract
Species of Colletotrichum are commonly found in many plant hosts as pathogens, endophytes and occasionally saprobes. Twenty-two Colletotrichum strains were isolated from three Dendrobium species - D.cariniferum, D.catenatum and D.harveyanum, as well as three unidentified species. The taxa were identified using morphological characterisation and phylogenetic analyses of ITS, GAPDH, ACT and ß-tubulin sequence data. This is the first time to identify endophytic fungi from Dendrobium orchids using the above method. The known species, Colletotrichumboninense, C.camelliae-japonicae, C.fructicola, C.jiangxiense and C.orchidophilum were identified as fungal endophytes of Dendrobium spp., along with the new species, C.cariniferi, C.chiangraiense, C.doitungense, C.parallelophorum and C.watphraense, which are introduced in this paper. One strain is recorded as an unidentified species. Corn meal agar is recommended as a good sporulation medium for Colletotrichum species. This is the first report of fungal endophytes associated with Dendrobiumcariniferum and D.harveyanum. Colletotrichumcamelliae-japonicae, C.jiangxiense, and C.orchidophilum are new host records for Thailand.
Collapse
Affiliation(s)
- Xiaoya Ma
- Engineering and Research Center for Southwest Biopharmaceutical Resource of National Education Ministry of China, Guizhou University, Guiyang 550025, Guizhou Province, People’s Republic of China
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Sureeporn Nontachaiyapoom
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Ruvishika S. Jayawardena
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Kevin D. yde
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Eleni Gentekaki
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Sixuan Zhou
- Engineering and Research Center for Southwest Biopharmaceutical Resource of National Education Ministry of China, Guizhou University, Guiyang 550025, Guizhou Province, People’s Republic of China
- Guizhou institute of animal husbandry and veterinary, Guiyang, Guizhou province, 550005, People’s Republic of China
| | - Yixin Qian
- Engineering and Research Center for Southwest Biopharmaceutical Resource of National Education Ministry of China, Guizhou University, Guiyang 550025, Guizhou Province, People’s Republic of China
| | - Tingchi Wen
- Engineering and Research Center for Southwest Biopharmaceutical Resource of National Education Ministry of China, Guizhou University, Guiyang 550025, Guizhou Province, People’s Republic of China
| | - Jichuan Kang
- Engineering and Research Center for Southwest Biopharmaceutical Resource of National Education Ministry of China, Guizhou University, Guiyang 550025, Guizhou Province, People’s Republic of China
| |
Collapse
|
4
|
Velho AC, Alaniz S, Casanova L, Mondino P, Stadnik MJ. New insights into the characterization of Colletotrichum species associated with apple diseases in southern Brazil and Uruguay. Fungal Biol 2015; 119:229-44. [PMID: 25813510 DOI: 10.1016/j.funbio.2014.12.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 12/17/2014] [Accepted: 12/18/2014] [Indexed: 11/24/2022]
Abstract
Colletotrichum species are associated with Apple bitter rot (ABR) and Glomerella leaf spot (GLS). Whereas both apple diseases occur frequently in Brazil, only the former has been reported in Uruguay. This work was aimed at identifying and comparing morpho-cultural characteristics and pathogenic variability of thirty-nine Colletotrichum isolates from both countries. Sequencing of the internal transcribed spacer (ITS) rDNA, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), and β-tubulin (TUB2) allowed the identification of three species causing ABR and GLS in Brazil, i.e., Colletotrichum fructicola, Colletotrichum karstii, and Colletotrichum nymphaeae; and three species causing ABR in Uruguay, i.e., C. fructicola, Colletotrichum theobromicola, and Colletotrichum melonis. Six groups of colony colours were recorded with group 1 (mycelium white to pink and in reverse pinkish) and group 2 (mycelium white to grey and in reverse pinkish) the most frequent. Isolates of C. fructicola and C. theobromicola were sensitive to benomyl, while C. karstii, C. nymphaeae, and C. melonis were resistant. Conidia were predominantly cylindrical for C. fructicola and C. karstii, fusiform for C. nymphaeae and C. melonis, and obclavate for C. theobromicola. Brazilian isolates caused ABR in wounded fruits, but only five in non-wounded ones. Uruguayan isolates produced symptoms in fruits with or without previous wounding. All Brazilian isolates from GLS and twelve from ABR were able to cause GLS symptoms, while a sole Uruguayan ABR-isolate caused leaf spot symptoms. This study gives a better insight on the new species causing apple disease in both countries and discusses their pathogenic potential.
Collapse
Affiliation(s)
- Aline Cristina Velho
- Laboratory of Plant Pathology, Agricultural Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga 1346, 88034-001 Florianópolis, SC, Brazil
| | - Sandra Alaniz
- Department of Plant Protection, Faculty of Agronomy, University of the Republic, Av. Garzón 780, CP 12900 Montevideo, Uruguay
| | - Leticia Casanova
- Department of Plant Protection, Faculty of Agronomy, University of the Republic, Av. Garzón 780, CP 12900 Montevideo, Uruguay
| | - Pedro Mondino
- Department of Plant Protection, Faculty of Agronomy, University of the Republic, Av. Garzón 780, CP 12900 Montevideo, Uruguay
| | - Marciel J Stadnik
- Laboratory of Plant Pathology, Agricultural Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga 1346, 88034-001 Florianópolis, SC, Brazil.
| |
Collapse
|