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Fu C, Wan S, Yang P, Zhao X, Yan Y, Jiang S, Ali H. Identification of the Ilex macrocarpa anthracnose pathogen and the antifungal potential of the cell-free supernatant of Bacillus velezensis against Colletotrichum fioriniae. Front Microbiol 2024; 15:1419436. [PMID: 38966396 PMCID: PMC11222323 DOI: 10.3389/fmicb.2024.1419436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Accepted: 06/07/2024] [Indexed: 07/06/2024] Open
Abstract
Introduction Anthracnose is a significant fungal disease that affects tree growth and development, with Colletotrichum spp. exhibiting host non-specificity and targeting various organs, making disease control challenging. Methods This study aimed to identify the pathogenic species causing anthracnose in Ilex macrocarpa in Nanchong, Sichuan Province, and screen effective fungicides, particularly biological ones. The pathogen was identified as Colletotrichum fioriniae through morphological observation, pathogenicity assays, and molecular biological methods. Three biological and five chemical fungicides were evaluated for their effects on the mycelial growth and spore germination rate of the pathogen. Results The results indicated that prochloraz was the most effective chemical fungicide, while the cell-free supernatant (CFS) of Bacillus velezensis had the most significant inhibitory effect among the biological fungicides. Transcriptome analysis revealed that the CFS of B. velezensis significantly reduced the expression of genes associated with ribosomes, genetic information processing, membrane lipid metabolism, and sphingolipid biosynthesis in C. fioriniae. Additionally, the glutathione pathway's expression of various genes, including key genes such as GST, GFA, Grx, TRR, and POD, was induced. Furthermore, the expression of 17 MFS transporters and 9 ABC transporters was increased. Autophagy-related ATGs were also affected by the B. velezensis CFS. Discussion These findings suggest that the B. velezensis CFS may inhibit C. fioriniae through interference with ribosomes, genetic information processing, cell membrane metabolism, and energy metabolism. These results provide potential target genes for the B. velezensis CFS and insights into the antifungal mechanism by which B. velezensis inhibits C. fioriniae.
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Affiliation(s)
- Chun Fu
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, Leshan, China
| | - Shushan Wan
- Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Science, China West Normal University, Nanchong, China
| | - Peng Yang
- Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Science, China West Normal University, Nanchong, China
| | - Xizhu Zhao
- Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Science, China West Normal University, Nanchong, China
| | - Yueyao Yan
- Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Science, China West Normal University, Nanchong, China
| | - Shijiao Jiang
- Key Laboratory of Southwest China Wildlife Resources Conservation, College of Life Science, China West Normal University, Nanchong, China
| | - Habib Ali
- Department of Agricultural Engineering, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
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Zhang S, Xu Y, Wang F, Yang L, Luo L, Jiang L. Transcriptomic and Physiological Analysis of the Effects of Exogenous Phloretin and Pterostilbene on Resistance Responses of Stylosanthes against Anthracnose. Int J Mol Sci 2024; 25:2701. [PMID: 38473948 DOI: 10.3390/ijms25052701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/17/2024] [Accepted: 02/23/2024] [Indexed: 03/14/2024] Open
Abstract
Anthracnose caused by Colletotrichum gloeosporioides is a destructive disease of Stylosanthes (stylo). Combination treatment of phloretin and pterostilbene (PP) has been previously shown to effectively inhibit the conidial germination and mycelial growth of C. gloeosporioides in vitro. In this study, the effects of PP treatment on the growth of C. gloeosporioides in vivo and the biocontrol mechanisms were investigated. We found that exogenous PP treatment could limit the growth of C. gloeosporioides and alleviate the damage of anthracnose in stylo. Comparative transcriptome analysis revealed that 565 genes were up-regulated and 239 genes were down-regulated upon PP treatment during the infection by C. gloeosporioides. The differentially expressed genes were mainly related to oxidative stress and chloroplast organization. Further physiological analysis revealed that application of PP after C. gloeosporioides inoculation significantly reduced the accumulation of O2•- level and increased the accumulation of antioxidants (glutathione, ascorbic acid and flavonoids) as well as the enzyme activity of total antioxidant capacity, superoxide dismutase, catalase, glutathione reductase, peroxidase and ascorbate peroxidase. PP also reduced the decline of chlorophyll a + b and increased the content of carotenoid in response to C. gloeosporioides infection. These results suggest that PP treatment alleviates anthracnose by improving antioxidant capacity and reducing the damage of chloroplasts, providing insights into the biocontrol mechanisms of PP on the stylo against anthracnose.
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Affiliation(s)
- Shizi Zhang
- Key Laboratory of Sustainable Utilization of Tropical Biological Resources of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Yunfeng Xu
- Key Laboratory of Sustainable Utilization of Tropical Biological Resources of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Fang Wang
- Key Laboratory of Sustainable Utilization of Tropical Biological Resources of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Liyun Yang
- Key Laboratory of Sustainable Utilization of Tropical Biological Resources of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Lijuan Luo
- Key Laboratory of Sustainable Utilization of Tropical Biological Resources of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
| | - Lingyan Jiang
- Key Laboratory of Sustainable Utilization of Tropical Biological Resources of Hainan Province, School of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
- School of Breeding and Multiplication (Sanya Institute of Breeding and Multiplication), Hainan University, Sanya 572025, China
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Heo Y, Lee Y, Balaraju K, Jeon Y. Characterization and evaluation of Bacillus subtilis GYUN-2311 as a biocontrol agent against Colletotrichum spp. on apple and hot pepper in Korea. Front Microbiol 2024; 14:1322641. [PMID: 38260885 PMCID: PMC10800898 DOI: 10.3389/fmicb.2023.1322641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/12/2023] [Indexed: 01/24/2024] Open
Abstract
Crop plants are vulnerable to a variety of diseases, including anthracnose, caused by various species of Colletotrichum fungi that damages major crops, including apples and hot peppers. The use of chemical fungicides for pathogen control may lead to environmental pollution and disease resistance. Therefore, we conducted this research to develop a Bacillus subtilis-based biological control agent (BCA). B. subtilis GYUN-2311 (GYUN-2311), isolated from the rhizosphere soil of an apple orchard, exhibited antagonistic activity against a total of 12 fungal pathogens, including eight Colletotrichum species. The volatile organic compounds (VOCs) and culture filtrate (CF) from GYUN-2311 displayed antifungal activity against all 12 pathogens, with 81% control efficiency against Fusarium oxysporum for VOCs and 81.4% control efficacy against Botryosphaeria dothidea for CF. CF also inhibited germination and appressorium formation in Colletotrichum siamense and C. acutatum. The CF from GYUN-2311 showed antifungal activity against all 12 pathogens in different media, particularly in LB medium. It also exhibited plant growth-promoting (PGP) activity, lytic enzyme activity, siderophore production, and the ability to solubilize insoluble phosphate. In trials on apples and hot peppers, GYUN-2311 effectively controlled disease, with 75 and 70% control efficacies against C. siamense in wounded and unwounded apples, respectively. Similarly, the control efficacy of hot pepper against C. acutatum in wounded inoculation was 72%. Combined application of GYUN-2311 and chemical suppressed hot pepper anthracnose to a larger extent than other treatments, such as chemical control, pyraclostrobin, TK®, GYUN-2311 and cross-spraying of chemical and GYUN-2311 under field conditions. The genome analysis of GYUN-2311 identified a circular chromosome comprising 4,043 predicted protein-coding sequences (CDSs) and 4,096,969 bp. B. subtilis SRCM104005 was the strain with the highest average nucleotide identity (ANI) to GYUN-2311. AntiSMASH analysis identified secondary metabolite biosynthetic genes, such as subtilomycin, bacillaene, fengycin, bacillibactin, pulcherriminic acid, subtilosin A, and bacilysin, whereas BAGEL analysis confirmed the presence of competence (ComX). Six secondary metabolite biosynthetic genes were induced during dual culture in the presence of C. siamense. These findings demonstrate the biological control potential of GYUN-2311 against apple and hot pepper anthracnose.
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Affiliation(s)
- Yunjeong Heo
- Department of Plant Medicals, Andong National University, Andong, Republic of Korea
| | - Younmi Lee
- Department of Plant Medicals, Andong National University, Andong, Republic of Korea
| | - Kotnala Balaraju
- Agricultural Science and Technology Research Institute, Andong National University, Andong, Republic of Korea
| | - Yongho Jeon
- Department of Plant Medicals, Andong National University, Andong, Republic of Korea
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Hsieh TF, Shen YM, Huang JH, Tsai JN, Lu MT, Lin CP. Insights into Grape Ripe Rot: A Focus on the Colletotrichum gloeosporioides Species Complex and Its Management Strategies. PLANTS (BASEL, SWITZERLAND) 2023; 12:2873. [PMID: 37571026 PMCID: PMC10421077 DOI: 10.3390/plants12152873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 07/27/2023] [Accepted: 08/03/2023] [Indexed: 08/13/2023]
Abstract
Grape ripe rot, which is predominantly caused by the Colletotrichum species, presents a growing threat to global grape cultivation. This threat is amplified by the increasing populations of the Colletotrichum species in response to warmer climates. In this review, we investigate the wide-ranging spectrum of grape ripe rot, specifically highlighting the role and characteristics of the C. gloeosporioides species complex (CGSC). We incorporate this understanding as we explore the diverse symptoms that lead to infected grapevines, their intricate life cycle and epidemiology, and the escalating prevalence of C. viniferum in Asia and globally. Furthermore, we delve into numerous disease management strategies, both conventional and emerging, such as prevention and mitigation measures. These strategies include the examination of host resistances, beneficial cultivation practices, sanitation measures, microbiome health maintenance, fungicide choice and resistance, as well as integrated management approaches. This review seeks to enhance our understanding of this globally significant disease, aspiring to assist in the development and improvement of effective prevention and control strategies.
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Affiliation(s)
- Ting-Fang Hsieh
- Plant Pathology Division, Taiwan Agricultural Research Institute, Taichung City 41362, Taiwan; (T.-F.H.); (J.-H.H.); (J.-N.T.)
| | - Yuan-Min Shen
- Master Program for Plant Medicine, College of Bio-Resources and Agriculture, National Taiwan University, Taipei 10617, Taiwan;
| | - Jin-Hsing Huang
- Plant Pathology Division, Taiwan Agricultural Research Institute, Taichung City 41362, Taiwan; (T.-F.H.); (J.-H.H.); (J.-N.T.)
| | - Jyh-Nong Tsai
- Plant Pathology Division, Taiwan Agricultural Research Institute, Taichung City 41362, Taiwan; (T.-F.H.); (J.-H.H.); (J.-N.T.)
| | - Ming-Te Lu
- Crop Science Division, Taiwan Agricultural Research Institute, Taichung City 41326, Taiwan;
| | - Chu-Ping Lin
- Plant Pathology Division, Taiwan Agricultural Research Institute, Taichung City 41362, Taiwan; (T.-F.H.); (J.-H.H.); (J.-N.T.)
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Salotti I, Liang YJ, Ji T, Rossi V. Development of a model for Colletotrichum diseases with calibration for phylogenetic clades on different host plants. FRONTIERS IN PLANT SCIENCE 2023; 14:1069092. [PMID: 37063197 PMCID: PMC10090521 DOI: 10.3389/fpls.2023.1069092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 03/15/2023] [Indexed: 06/19/2023]
Abstract
Fungi in the genus Colletotrichum cause serious pre- and post-harvest losses to several agricultural crops worldwide. Through a systematic literature review, we retrieved the published information on Colletotrichum anthracnose diseases on different host plants and developed a mechanistic model incorporating the main stages of the pathogen's life cycle and the effect of weather. The model predicts anthracnose progress during the growing season on the aerial organs of different crops, and was parameterized for seven Colletotrichum clades (acutatum, dematium, destructivum, gloeosporioides, graminicola, and orbiculare) and the singleton species, C. coccodes. The model was evaluated for the anthracnose diseases caused by fungi belonging to five clades on six hosts by using data from 17 epidemics that occurred in Italy, the USA, Canada, and Japan. A comparison of observed versus predicted data showed a concordance correlation coefficient of 0.928 and an average distance between real data and the fitted line of 0.044. After further validation, the model could be used to support decision-making for crop protection.
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Affiliation(s)
- Irene Salotti
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Yu-Jie Liang
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
- Department of Agro‐forestry Ecosystems, Universitat Politècnica de València, Valencia, Spain
| | - Tao Ji
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
| | - Vittorio Rossi
- Department of Sustainable Crop Production, Università Cattolica del Sacro Cuore, Piacenza, Italy
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