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Romero-Cuadrado L, Picos MC, Camacho M, Ollero FJ, Capote N. Biocontrol of almond canker diseases caused by Botryosphaeriaceae fungi. PEST MANAGEMENT SCIENCE 2024; 80:1839-1848. [PMID: 38050948 DOI: 10.1002/ps.7919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/27/2023] [Accepted: 12/05/2023] [Indexed: 12/07/2023]
Abstract
BACKGROUND Botryosphaeria dieback is a canker disease caused by fungal species of the Botryosphaeriaceae family that threatens almond productivity. The most common control measure to prevent canker development is the application of fungicides which are being phased out by European Union regulations. In the present study, two sets of bacterial strains were evaluated for their antifungal activity against pathogenic Botryosphaeriaceae species through in vitro and in vivo antagonism assays. RESULTS The rhizospheric bacteria Pseudomonas aeruginosa AC17 and Bacillus velezensis ACH16, as well as the endophytic bacteria Bacillus mobilis Sol 1-2, respectively inhibited 87, 95, and 63% of the mycelial growth of Neofusicoccum parvum, Botryosphaeria dothidea, Diplodia seriata, and Macrophomina phaseolina. Additionally, they significantly reduced the length of lesions caused by N. parvum and B. dothidea in artificially inoculated detached almond twigs. All these bacterial strains produce hydrolytic enzymes that are able to degrade the fungal cell wall. P. aeruginosa AC17 also produces toxic volatile compounds, such as hydrogen cyanide. This strain was the most effective in controlling Botryosphaeria dieback in planta under controlled conditions at a level similar to the biocontrol agent Trichoderma atroviride and standard chemical fungicide treatments. CONCLUSION Pseudomonas aeruginosa AC17 is the best candidate to be considered as a potential biocontrol agent against Botryosphaeriaceae fungi affecting almond. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Laura Romero-Cuadrado
- Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA), Center Las Torres, Seville, Spain
| | - María Cinta Picos
- Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA), Center Las Torres, Seville, Spain
| | - María Camacho
- Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA), Center Las Torres, Seville, Spain
| | | | - Nieves Capote
- Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA), Center Las Torres, Seville, Spain
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Ajijah N, Fiodor A, Dziurzynski M, Stasiuk R, Pawlowska J, Dziewit L, Pranaw K. Biocontrol potential of Pseudomonas protegens ML15 against Botrytis cinerea causing gray mold on postharvest tomato ( Solanum lycopersicum var. cerasiforme). FRONTIERS IN PLANT SCIENCE 2023; 14:1288408. [PMID: 38143572 PMCID: PMC10748600 DOI: 10.3389/fpls.2023.1288408] [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: 09/05/2023] [Accepted: 11/17/2023] [Indexed: 12/26/2023]
Abstract
Gray mold, caused by Botrytis cinerea is a major cause of post-harvest rot of fresh fruits and vegetables. The utilization of selected microorganisms as biocontrol agents is a promising alternative to effectively control gray mold on tomatoes. The current study was conducted to explore potential biocontrol mechanisms of the Pseudomonas strain to control infections on post-harvest tomatoes. Among the 8 tested bacterial isolates, Pseudomonas protegens ML15 demonstrated antagonistic activity to Botrytis cinerea. Moreover, P. protegens ML15 exhibited the production of siderophores, hydrogen cyanide, ammonia, exopolysaccharides, lipase, biosurfactant, 2,4-diacetylphloroglucinol, and several other antifungal compounds, such as 1-tetradecanol, cyclododecane, 2,4-di-tert-butylphenol, and 2-methyl-1-hexadecanol. A comprehensive genomic analysis of P. protegens ML15 unravels 18 distinct genetic regions with the potential for biosynthesizing secondary metabolites, known for their pivotal role in biocontrol responses against plant pathogens. In vivo, experiments showed that both culture suspension and cell-free supernatant of P. protegens ML15 significantly reduced fungal growth (53.0 ± 0.63%) and mitigated disease development (52.8 ± 1.5%) in cherry tomatoes at four days post-B. cinerea inoculation. During the infection, the application of P. protegens ML15 resulted in the augmentation of total antioxidant, phenolic content, and ascorbic acids content. Thus, our results suggested that P. protegens ML15's role as a biocontrol agent against B. cinerea-induced postharvest tomato decay achieved through the secretion of antifungal substances, induction of tomato defense responses, and inhibition of mycelial growth of B. cinerea. These findings provide a significant contribution to the ongoing search for alternative, eco-friendly methods of controlling gray mold in fresh products. The utilization of P. protegens ML15 as a biocontrol agent could help to reduce the reliance on chemical fungicides and promote sustainable agriculture practices.
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Affiliation(s)
- Nur Ajijah
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Angelika Fiodor
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Mikolaj Dziurzynski
- Department of Biology (DBIO), University of Florence, Sesto Fiorentino, Florence, Italy
| | - Robert Stasiuk
- Department of Geomicrobiology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Julia Pawlowska
- Institute of Evolutionary Biology, Faculty of Biology, Biological and Chemical Research Center, University of Warsaw, Warsaw, Poland
| | - Lukasz Dziewit
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Kumar Pranaw
- Department of Environmental Microbiology and Biotechnology, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
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Zhang J, Wang S, Wang H, He P, Chang Y, Zheng W, Tang X, Li L, Wang C, He X. Metabolome and Transcriptome Profiling Reveals the Function of MdSYP121 in the Apple Response to Botryosphaeria dothidea. Int J Mol Sci 2023; 24:16242. [PMID: 38003432 PMCID: PMC10671699 DOI: 10.3390/ijms242216242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 11/04/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
The vesicular transport system is important for substance transport in plants. In recent years, the regulatory relationship between the vesicular transport system and plant disease resistance has received widespread attention; however, the underlying mechanism remains unclear. MdSYP121 is a key protein in the vesicular transport system. The overexpression of MdSYP121 decreased the B. dothidea resistance of apple, while silencing MdSYP121 resulted in the opposite phenotype. A metabolome and transcriptome dataset analysis showed that MdSYP121 regulated apple disease resistance by significantly affecting sugar metabolism. HPLC results showed that the levels of many soluble sugars were significantly higher in the MdSYP121-OE calli. Furthermore, the expression levels of genes related to sugar transport were significantly higher in the MdSYP121-OE calli after B. dothidea inoculation. In addition, the relationships between the MdSYP121 expression level, the soluble sugar content, and apple resistance to B. dothidea were verified in an F1 population derived from a cross between 'Golden Delicious' and 'Fuji Nagafu No. 2'. In conclusion, these results suggested that MdSYP121 negatively regulated apple resistance to B. dothidea by influencing the soluble sugar content. These technologies and methods allow us to investigate the molecular mechanism of the vesicular transport system regulating apple resistance to B. dothidea.
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Affiliation(s)
- Jiahu Zhang
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
- College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China; (X.T.); (C.W.)
| | - Sen Wang
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
| | - Haibo Wang
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
| | - Ping He
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
| | - Yuansheng Chang
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
| | - Wenyan Zheng
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
| | - Xiao Tang
- College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China; (X.T.); (C.W.)
| | - Linguang Li
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
| | - Chen Wang
- College of Life Sciences, Shandong Agricultural University, Tai’an 271018, China; (X.T.); (C.W.)
| | - Xiaowen He
- Shandong Institute of Pomology, Tai’an 271000, China; (J.Z.); (S.W.); (H.W.); (P.H.); (Y.C.); (W.Z.); (L.L.)
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