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Ayaz M, Zhao JT, Zhao W, Chi YK, Ali Q, Ali F, Khan AR, Yu Q, Yu JW, Wu WC, Qi RD, Huang WK. Biocontrol of plant parasitic nematodes by bacteria and fungi: a multi-omics approach for the exploration of novel nematicides in sustainable agriculture. Front Microbiol 2024; 15:1433716. [PMID: 39132133 PMCID: PMC11316259 DOI: 10.3389/fmicb.2024.1433716] [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: 05/16/2024] [Accepted: 07/09/2024] [Indexed: 08/13/2024] Open
Abstract
Plant parasitic nematodes (PPNs) pose a significant threat to global crop productivity, causing an estimated annual loss of US $157 billion in the agriculture industry. While synthetic chemical nematicides can effectively control PPNs, their overuse has detrimental effects on human health and the environment. Biocontrol agents (BCAs), such as bacteria and fungi in the rhizosphere, are safe and promising alternatives for PPNs control. These BCAs interact with plant roots and produce extracellular enzymes, secondary metabolites, toxins, and volatile organic compounds (VOCs) to suppress nematodes. Plant root exudates also play a crucial role in attracting beneficial microbes toward infested roots. The complex interaction between plants and microbes in the rhizosphere against PPNs is mostly untapped which opens new avenues for discovering novel nematicides through multi-omics techniques. Advanced omics approaches, including metagenomics, transcriptomics, proteomics, and metabolomics, have led to the discovery of nematicidal compounds. This review summarizes the status of bacterial and fungal biocontrol strategies and their mechanisms for PPNs control. The importance of omics-based approaches for the exploration of novel nematicides and future directions in the biocontrol of PPNs are also addressed. The review highlighted the potential significance of multi-omics techniques in biocontrol of PPNs to ensure sustainable agriculture.
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Affiliation(s)
- Muhammad Ayaz
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Jing-Tian Zhao
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wei Zhao
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Yuan-Kai Chi
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Qurban Ali
- Department of Biology, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Farman Ali
- Department of Entomology, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Abdur Rashid Khan
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qing Yu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jing-Wen Yu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wen-Cui Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ren-De Qi
- Institute of Plant Protection and Agro-Products Safety, Anhui Academy of Agricultural Sciences, Hefei, China
| | - Wen-Kun Huang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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Ajuna HB, Lim HI, Moon JH, Won SJ, Choub V, Choi SI, Yun JY, Ahn YS. The Prospect of Hydrolytic Enzymes from Bacillus Species in the Biological Control of Pests and Diseases in Forest and Fruit Tree Production. Int J Mol Sci 2023; 24:16889. [PMID: 38069212 PMCID: PMC10707167 DOI: 10.3390/ijms242316889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/18/2023] Open
Abstract
Plant diseases and insect pest damage cause tremendous losses in forestry and fruit tree production. Even though chemical pesticides have been effective in the control of plant diseases and insect pests for several decades, they are increasingly becoming undesirable due to their toxic residues that affect human life, animals, and the environment, as well as the growing challenge of pesticide resistance. In this study, we review the potential of hydrolytic enzymes from Bacillus species such as chitinases, β-1,3-glucanases, proteases, lipases, amylases, and cellulases in the biological control of phytopathogens and insect pests, which could be a more sustainable alternative to chemical pesticides. This study highlights the application potential of the hydrolytic enzymes from different Bacillus sp. as effective biocontrol alternatives against phytopathogens/insect pests through the degradation of cell wall/insect cuticles, which are mainly composed of structural polysaccharides like chitins, β-glucans, glycoproteins, and lipids. This study demonstrates the prospects for applying hydrolytic enzymes from Bacillus sp. as effective biopesticides in forest and fruit tree production, their mode of biocidal activity and dual antimicrobial/insecticidal potential, which indicates a great prospect for the simultaneous biocontrol of pests/diseases. Further research should focus on optimizing the production of hydrolytic enzymes, and the antimicrobial/insecticidal synergism of different Bacillus sp. which could facilitate the simultaneous biocontrol of pests and diseases in forest and fruit tree production.
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Affiliation(s)
- Henry B. Ajuna
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
| | - Hyo-In Lim
- Forest Bioinformation Division, National Institute of Forest Science, Suwon 16631, Republic of Korea;
| | - Jae-Hyun Moon
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
| | - Sang-Jae Won
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
| | - Vantha Choub
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
| | - Su-In Choi
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
| | - Ju-Yeol Yun
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
| | - Young Sang Ahn
- Department of Forest Resources, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 61186, Republic of Korea; (H.B.A.); (J.-H.M.); (S.-J.W.); (V.C.); (S.-I.C.); (J.-Y.Y.)
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Tsai SH, Hsiao YC, Chang PE, Kuo CE, Lai MC, Chuang HW. Exploring the Biologically Active Metabolites Produced by Bacillus cereus for Plant Growth Promotion, Heat Stress Tolerance, and Resistance to Bacterial Soft Rot in Arabidopsis. Metabolites 2023; 13:metabo13050676. [PMID: 37233717 DOI: 10.3390/metabo13050676] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/16/2023] [Accepted: 05/19/2023] [Indexed: 05/27/2023] Open
Abstract
Eight gene clusters responsible for synthesizing bioactive metabolites associated with plant growth promotion were identified in the Bacillus cereus strain D1 (BcD1) genome using the de novo whole-genome assembly method. The two largest gene clusters were responsible for synthesizing volatile organic compounds (VOCs) and encoding extracellular serine proteases. The treatment with BcD1 resulted in an increase in leaf chlorophyll content, plant size, and fresh weight in Arabidopsis seedlings. The BcD1-treated seedlings also accumulated higher levels of lignin and secondary metabolites including glucosinolates, triterpenoids, flavonoids, and phenolic compounds. Antioxidant enzyme activity and DPPH radical scavenging activity were also found to be higher in the treated seedlings as compared with the control. Seedlings pretreated with BcD1 exhibited increased tolerance to heat stress and reduced disease incidence of bacterial soft rot. RNA-seq analysis showed that BcD1 treatment activated Arabidopsis genes for diverse metabolite synthesis, including lignin and glucosinolates, and pathogenesis-related proteins such as serine protease inhibitors and defensin/PDF family proteins. The genes responsible for synthesizing indole acetic acid (IAA), abscisic acid (ABA), and jasmonic acid (JA) were expressed at higher levels, along with WRKY transcription factors involved in stress regulation and MYB54 for secondary cell wall synthesis. This study found that BcD1, a rhizobacterium producing VOCs and serine proteases, is capable of triggering the synthesis of diverse secondary metabolites and antioxidant enzymes in plants as a defense strategy against heat stress and pathogen attack.
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Affiliation(s)
- Sih-Huei Tsai
- Department of Bioagricultural Sciences, National Chiayi University, Chiayi 600355, Taiwan
| | - Yi-Chun Hsiao
- Department of Bioagricultural Sciences, National Chiayi University, Chiayi 600355, Taiwan
| | - Peter E Chang
- Department of Bioagricultural Sciences, National Chiayi University, Chiayi 600355, Taiwan
| | - Chen-En Kuo
- Department of Bioagricultural Sciences, National Chiayi University, Chiayi 600355, Taiwan
| | - Mei-Chun Lai
- Department of Bioagricultural Sciences, National Chiayi University, Chiayi 600355, Taiwan
| | - Huey-Wen Chuang
- Department of Bioagricultural Sciences, National Chiayi University, Chiayi 600355, Taiwan
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