1
|
Mendoza-Mendoza A, Esquivel-Naranjo EU, Soth S, Whelan H, Alizadeh H, Echaide-Aquino JF, Kandula D, Hampton JG. Uncovering the multifaceted properties of 6-pentyl-alpha-pyrone for control of plant pathogens. FRONTIERS IN PLANT SCIENCE 2024; 15:1420068. [PMID: 38957597 PMCID: PMC11217547 DOI: 10.3389/fpls.2024.1420068] [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: 04/19/2024] [Accepted: 05/27/2024] [Indexed: 07/04/2024]
Abstract
Some volatile organic compounds (VOCs) produced by microorganisms have the ability to inhibit the growth and development of plant pathogens, induce the activation of plant defenses, and promote plant growth. Among them, 6-pentyl-alpha-pyrone (6-PP), a ketone produced by Trichoderma fungi, has emerged as a focal point of interest. 6-PP has been isolated and characterized from thirteen Trichoderma species and is the main VOC produced, often accounting for >50% of the total VOCs emitted. This review examines abiotic and biotic interactions regulating the production of 6-PP by Trichoderma, and the known effects of 6-PP on plant pathogens through direct and indirect mechanisms including induced systemic resistance. While there are many reports of 6-PP activity against plant pathogens, the vast majority have been from laboratory studies involving only 6-PP and the pathogen, rather than glasshouse or field studies including a host plant in the system. Biopesticides based on 6-PP may well provide an eco-friendly, sustainable management tool for future agricultural production. However, before this can happen, challenges including demonstrating disease control efficacy in the field, developing efficient delivery systems, and determining cost-effective application rates must be overcome before 6-PP's potential for pathogen control can be turned into reality.
Collapse
Affiliation(s)
| | - Edgardo Ulises Esquivel-Naranjo
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, New Zealand
- Unit for Basic and Applied Microbiology, Faculty of Natural Sciences, Autonomous University of Queretaro, Queretaro, Mexico
| | - Sereyboth Soth
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, New Zealand
| | - Helen Whelan
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, New Zealand
| | - Hossein Alizadeh
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, New Zealand
| | | | - Diwakar Kandula
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, New Zealand
| | - John G. Hampton
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, New Zealand
| |
Collapse
|
2
|
Ji H, Yu R, Liu H, Zhang H, Wang X, Chen J, Li Y. Metabolic Features of a Novel Trichoderma asperellum YNQJ1002 with Potent Antagonistic Activity against Fusarium graminearum. Metabolites 2023; 13:1144. [PMID: 37999240 PMCID: PMC10673152 DOI: 10.3390/metabo13111144] [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: 09/11/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/25/2023] Open
Abstract
Trichoderma, a well-known and extensively studied fungal genus, has gained significant attention for its remarkable antagonistic abilities against a wide range of plant pathogens. In this study, a total of 108 Trichoderma isolates were screened through in vitro dual antagonistic assays and culture filtrate inhibition against Fusarium graminearum. Of these, the YNQJ1002 displayed noteworthy inhibitory activities along with thermal stability. To validate the metabolic differences between YNQJ1002 and GZLX3001 (with strong and weak antagonism, respectively), UPLC-TOF-MS/MS mass spectrometry was employed to analyze and compare the metabolite profiles. We identified 12 significantly up-regulated metabolites in YNQJ1002, which include compounds like Trigoneoside, Torvoside, trans,trans-hepta-2,4,6-trienoic acid, and Chamazulene. These metabolites are known for their antimicrobial properties or signaling roles as components of cell membranes. Enriched KEGG analysis revealed a significant enrichment in sphingolipid metabolism and linoleic acid metabolism, as well as autophagy. The results demonstrated that YNQJ1002's abundance of antimicrobial substances, resulting from specific metabolic pathways, enhanced its superior antagonistic activity against F. graminearum. Finally, YNQJ1002 was identified using the ITS, tef1-1α, and rpb2 regions, with MIST system sequence matching confirming its classification within the species. Overall, we have obtained a novel strain, T. asperellum YNQJ1002, which is rich in metabolites and shows potential antagonistic activity against F. graminearum. This study has opened promising prospects for the development of innovative Trichoderma-derived antifungal compounds, featuring a unique mechanism against pathogens.
Collapse
Affiliation(s)
- Huimin Ji
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ruohan Yu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongyi Liu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hui Zhang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinhua Wang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Key Laboratory of Urban, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jie Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Key Laboratory of Urban, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yaqian Li
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
- Key Laboratory of Urban, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China
| |
Collapse
|
3
|
Ansari M, Devi BM, Sarkar A, Chattopadhyay A, Satnami L, Balu P, Choudhary M, Shahid MA, Jailani AAK. Microbial Exudates as Biostimulants: Role in Plant Growth Promotion and Stress Mitigation. J Xenobiot 2023; 13:572-603. [PMID: 37873814 PMCID: PMC10594471 DOI: 10.3390/jox13040037] [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: 08/02/2023] [Revised: 09/18/2023] [Accepted: 09/21/2023] [Indexed: 10/25/2023] Open
Abstract
Microbes hold immense potential, based on the fact that they are widely acknowledged for their role in mitigating the detrimental impacts of chemical fertilizers and pesticides, which were extensively employed during the Green Revolution era. The consequence of this extensive use has been the degradation of agricultural land, soil health and fertility deterioration, and a decline in crop quality. Despite the existence of environmentally friendly and sustainable alternatives, microbial bioinoculants encounter numerous challenges in real-world agricultural settings. These challenges include harsh environmental conditions like unfavorable soil pH, temperature extremes, and nutrient imbalances, as well as stiff competition with native microbial species and host plant specificity. Moreover, obstacles spanning from large-scale production to commercialization persist. Therefore, substantial efforts are underway to identify superior solutions that can foster a sustainable and eco-conscious agricultural system. In this context, attention has shifted towards the utilization of cell-free microbial exudates as opposed to traditional microbial inoculants. Microbial exudates refer to the diverse array of cellular metabolites secreted by microbial cells. These metabolites enclose a wide range of chemical compounds, including sugars, organic acids, amino acids, peptides, siderophores, volatiles, and more. The composition and function of these compounds in exudates can vary considerably, depending on the specific microbial strains and prevailing environmental conditions. Remarkably, they possess the capability to modulate and influence various plant physiological processes, thereby inducing tolerance to both biotic and abiotic stresses. Furthermore, these exudates facilitate plant growth and aid in the remediation of environmental pollutants such as chemicals and heavy metals in agroecosystems. Much like live microbes, when applied, these exudates actively participate in the phyllosphere and rhizosphere, engaging in continuous interactions with plants and plant-associated microbes. Consequently, they play a pivotal role in reshaping the microbiome. The biostimulant properties exhibited by these exudates position them as promising biological components for fostering cleaner and more sustainable agricultural systems.
Collapse
Affiliation(s)
- Mariya Ansari
- Department of Mycology and Plant Pathology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India; (M.A.); (A.S.); (L.S.)
| | - B. Megala Devi
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India;
| | - Ankita Sarkar
- Department of Mycology and Plant Pathology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India; (M.A.); (A.S.); (L.S.)
| | - Anirudha Chattopadhyay
- Pulses Research Station, S.D. Agricultural University, Sardarkrushinagar 385506, Gujarat, India;
| | - Lovkush Satnami
- Department of Mycology and Plant Pathology, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India; (M.A.); (A.S.); (L.S.)
| | - Pooraniammal Balu
- Department of Biotechnology, Sastra Deemed University, Thanjavur 613401, Tamil Nadu, India;
| | - Manoj Choudhary
- Plant Pathology Department, University of Florida, Gainesville, FL 32611, USA;
| | - Muhammad Adnan Shahid
- Horticultural Science Department, North Florida Research and Education Center, University of Florida/IFAS, Quincy, FL 32351, USA;
| | - A. Abdul Kader Jailani
- Plant Pathology Department, University of Florida, Gainesville, FL 32611, USA;
- Plant Pathology Department, North Florida Research and Education Center, University of Florida, Quincy, FL 32351, USA
| |
Collapse
|
4
|
Badmi R, Gogoi A, Doyle Prestwich B. Secondary Metabolites and Their Role in Strawberry Defense. PLANTS (BASEL, SWITZERLAND) 2023; 12:3240. [PMID: 37765404 PMCID: PMC10537498 DOI: 10.3390/plants12183240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/21/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023]
Abstract
Strawberry is a high-value commercial crop and a model for the economically important Rosaceae family. Strawberry is vulnerable to attack by many pathogens that can affect different parts of the plant, including the shoot, root, flowers, and berries. To restrict pathogen growth, strawberry produce a repertoire of secondary metabolites that have an important role in defense against diseases. Terpenes, allergen-like pathogenesis-related proteins, and flavonoids are three of the most important metabolites involved in strawberry defense. Genes involved in the biosynthesis of secondary metabolites are induced upon pathogen attack in strawberry, suggesting their transcriptional activation leads to a higher accumulation of the final compounds. The production of secondary metabolites is also influenced by the beneficial microbes associated with the plant and its environmental factors. Given the importance of the secondary metabolite pathways in strawberry defense, we provide a comprehensive overview of their literature and their role in the defense responses of strawberry. We focus on terpenoids, allergens, and flavonoids, and discuss their involvement in the strawberry microbiome in the context of defense responses. We discuss how the biosynthetic genes of these metabolites could be potential targets for gene editing through CRISPR-Cas9 techniques for strawberry crop improvement.
Collapse
Affiliation(s)
- Raghuram Badmi
- School of Biological Earth and Environmental Sciences, University College Cork, T23 TK30 Cork, Ireland;
| | - Anupam Gogoi
- Department of Molecular Plant Biology, Norwegian Institute of Bioeconomy Research (NIBIO), 1433 Ås, Norway
| | - Barbara Doyle Prestwich
- School of Biological Earth and Environmental Sciences, University College Cork, T23 TK30 Cork, Ireland;
| |
Collapse
|
5
|
Rai A, Sharma VK, Sharma M, Singh SM, Singh BN, Pandey A, Nguyen QD, Gupta VK. A global perspective on a new paradigm shift in bio-based meat alternatives for healthy diet. Food Res Int 2023; 169:112935. [PMID: 37254360 DOI: 10.1016/j.foodres.2023.112935] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 04/13/2023] [Accepted: 05/01/2023] [Indexed: 06/01/2023]
Abstract
A meat analogue is a casserole in which the primary ingredient is something other than meat. It goes by various other names, such as meat substitute, fake meat, alternative meat, and imitation meat. Consumers growing interest in improving their diets and the future of the planet have contributed to the move towards meat substitutes. This change is due to the growing popularity of low-fat and low-calorie diets, the rise of flexitarians, the spread of animal diseases, the loss of natural resources, and the need to cut down on carbon emissions, which lead to greenhouse effects. Plant-based meat, cultured meat, algal protein-based meat, and insect-based meat substitutes are available on the market with qualities like appearance and flavor similar to those of traditional meat. Novel ingredients like mycoprotein and soybean leg haemoglobin are mixed in with the more traditional soy proteins, cereals, green peas, etc. Plant-based meat is currently more popular in the West, but the growing interest in this product in Asian markets indicates the industry in this region will expand rapidly in the near future. Future growth in the food sector can be anticipated from technologies like lab-grown meat and its equivalents that do not require livestock breeding. Insect-based products also hold great potential as a new source of protein for human consumption. However, product safety and quality should be considered along with other factors such as marketability and affordability.
Collapse
Affiliation(s)
- Akanksha Rai
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Vivek K Sharma
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Minaxi Sharma
- Haute Ecole Provinciale de Hainaut- Condorcet, 7800 ATH, Belgium
| | - Shiv M Singh
- Department of Botany, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
| | - Brahma N Singh
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India.
| | - Anita Pandey
- Department of Biotechnology, Graphic Era Deemed to be University, Dehradun 248002, Uttarakhand, India
| | - Quang D Nguyen
- Department of Bioengineering and Alcoholic Drink Technology, Institute of Food Science and Technology, Hungarian University of Agriculture and Life Sciences, H-1118 Budapest, Ménesi út 45, Hungary
| | - Vijai Kumar Gupta
- Biorefiningand Advanced Materials Research Center, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK; Centerfor Safe and Improved Foods, SRUC, Kings Buildings, West Mains Road, Edinburgh EH9 3JG, UK.
| |
Collapse
|
6
|
Yao X, Guo H, Zhang K, Zhao M, Ruan J, Chen J. Trichoderma and its role in biological control of plant fungal and nematode disease. Front Microbiol 2023; 14:1160551. [PMID: 37206337 PMCID: PMC10189891 DOI: 10.3389/fmicb.2023.1160551] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/04/2023] [Indexed: 05/21/2023] Open
Abstract
Trichoderma is mainly used to control soil-borne diseases as well as some leaf and panicle diseases of various plants. Trichoderma can not only prevent diseases but also promotes plant growth, improves nutrient utilization efficiency, enhances plant resistance, and improves agrochemical pollution environment. Trichoderma spp. also behaves as a safe, low-cost, effective, eco-friendly biocontrol agent for different crop species. In this study, we introduced the biological control mechanism of Trichoderma in plant fungal and nematode disease, including competition, antibiosis, antagonism, and mycoparasitism, as well as the mechanism of promoting plant growth and inducing plant systemic resistance between Trichoderma and plants, and expounded on the application and control effects of Trichoderma in the control of various plant fungal and nematode diseases. From an applicative point of view, establishing a diversified application technology for Trichoderma is an important development direction for its role in the sustainable development of agriculture.
Collapse
Affiliation(s)
- Xin Yao
- College of Agronomy, Guizhou University, Guiyang, China
| | - Hailin Guo
- Science and Technology Innovation Development Center of Bijie City, Bijie, China
| | - Kaixuan Zhang
- Institute of Crop Science, Chinese Academy of Agriculture Science, Beijing, China
| | - Mengyu Zhao
- College of Agronomy, Guizhou University, Guiyang, China
| | - Jingjun Ruan
- College of Agronomy, Guizhou University, Guiyang, China
- *Correspondence: Jingjun Ruan,
| | - Jie Chen
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
- Jie Chen,
| |
Collapse
|
7
|
Shahrajabian MH, Sun W. Sustainable Approaches to Boost Yield and Chemical Constituents of Aromatic and Medicinal Plants by Application of Biostimulants. RECENT ADVANCES IN FOOD, NUTRITION & AGRICULTURE 2022; 13:RAFNA-EPUB-126745. [PMID: 36200191 DOI: 10.2174/2772574x13666221004151822] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 07/15/2022] [Accepted: 08/11/2022] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Biostimulants consist of natural ingredients, metabolites of fermentation, micro-organisms, algae or plant extracts, bacteria, mushrooms, humus substances, amino acids, biomolecules, etc. Methods: In this study, all relevant English-language articles were collected. The literature was reviewed using the keywords of biostimulant, medicinal plant, aromatic plant, natural products, and pharmaceutical benefits from Google Scholar, Scopus, and PubMed databases. RESULTS The significant and promoting impact of biostimulants has been reported for different medicinal and aromatic plants, such as salicylic acid for ajuga, artichoke, ajwain, basil, common rue, common sage, common thyme, coneflower, coriander, dendrobium, desert Indian wheat, dragonhead, fennel, fenugreek, feverfew, ginger, groundnut, guava, henna, Iranian soda, lavender, lemon balm, lemongrass, Malabar spinach; seaweed extract on almond, bird, s eye chili; amino acids on artemisia, broccoli, chamomile, beneficial bacteria on ashwagandha; humic acid on black cumin, cannabis, chicory, garlic, gerbera, Hungarian vetch, Moldavian dragonhead, niger plant; chitosan on dragon fruit, marigold, milk thistle, etc. The suggested mechanisms include the stimulatory impacts on the activity of enzymes involved in different biosynthetic processes, the hormone-like activity of biostimulant compounds and the improvement of nutrient uptake of plants. CONCLUSION The current manuscript gives many examples of the potential of biostimulants for medicinal and aromatic plant production. However, further studies are needed to better understand the effectiveness of different biostimulants and foliar applications in sustainable agriculture.
Collapse
Affiliation(s)
| | - Wenli Sun
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| |
Collapse
|
8
|
Liu Y, Liu Y, Chen Y, Zhao P, Yang S, He S, Long G. Sulfur fertiliser enhancement of Erigeron breviscapus (Asteraceae) quality by improving plant physiological responses and reducing soil cadmium bioavailability. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:70508-70519. [PMID: 35585458 DOI: 10.1007/s11356-022-20778-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Erigeron breviscapus (Vant.) Hand.-Mazz. is an important medicinal plant; however, its quality is severely diminished by cadmium (Cd) pollution. Sulfur fertilisation can improve the production and application of E. breviscapus. This study examined Cd stress alleviation in the soil-plant system and determined the plant growth response after the application of sulfur fertiliser. The soil Cd concentration used in the treatments was 100 g·kg-1, and the sulfur fertiliser application rates were 0.1, 0.2, and 0.3 g·kg-1. Using pot experiments, we explored the impacts of high, medium, and low amounts of sulfur fertiliser on Cd accumulation and the quality and activity of E. breviscapus. The results showed that the application of sulfur fertiliser promoted Cd transformation to residual Cd under oxidation conditions, reducing Cd accumulation in E. breviscapus. Throughout the growth period, the application of sulfur fertiliser increased the soluble protein content and antioxidant enzyme activity, which alleviated Cd toxicity. The net photosynthetic rate, transpiration rate, intercellular CO2 concentration, chlorophyll level, and leaf width increased significantly. The biomass content of E. breviscapus also increased. Sulfur fertiliser improves the quality of herbaceous medicinal plants by reducing Cd accumulation and increasing scutellarin, chlorogenic, isochlorogenic acid B, and isochlorogenic acid C contents. A reasonable application of sulfur fertiliser is essential for improving E. breviscapus quality. This study provides a new method to reduce the ecological risk of planting herbaceous medicinal plants in Cd-contaminated soil.
Collapse
Affiliation(s)
- Yonglin Liu
- School of Municipal and Environment Engineering, Qingdao University of Technology, Qingdao, 266000, People's Republic of China
| | - Yingpin Liu
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650000, People's Republic of China
| | - Yu Chen
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650000, People's Republic of China
| | - Ping Zhao
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650000, People's Republic of China
| | - Shengchao Yang
- National and Local Joint Engineering Research Center On Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming, 650000, People's Republic of China
- The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Kunming, 650000, People's Republic of China
| | - Shuran He
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650000, People's Republic of China.
- National and Local Joint Engineering Research Center On Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming, 650000, People's Republic of China.
- The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Kunming, 650000, People's Republic of China.
| | - Guangqiang Long
- National and Local Joint Engineering Research Center On Germplasm Innovation and Utilization of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming, 650000, People's Republic of China.
- The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Kunming, 650000, People's Republic of China.
| |
Collapse
|
9
|
Pang G, Sun T, Ding M, Li J, Zhao Z, Shen Q, Cai FM. Characterization of an Exceptional Fungal Mutant Enables the Discovery of the Specific Regulator of a Silent PKS-NRPS Hybrid Biosynthetic Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:11769-11781. [PMID: 36084284 DOI: 10.1021/acs.jafc.2c03550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Filamentous fungi produce a great variety of bioactive secondary metabolites essential for their biotic interactions. Here, we characterized an exceptional Trichoderma mutant overproducing harzianic acids (HAs) with exclusively highly antifungal activity against numerous fungi from different ecological groups. Interestingly, two transcription factors (TFs) were identified in this HA biosynthetic gene cluster (hac BGC), with HacI regulating the biosynthetic genes and HacF being likely responsible for the product transportation essential for the self-detoxification of the fungus from the produced HAs. Evolutionary analysis suggested that the sparse distribution of hac BGC in many environmental opportunistic fungi including several species from Trichoderma, Penicillium, and Aspergillus could result from lateral gene transfers and pervasive gene losses in different lineages of Pezizomycotina. Taken together, we propose that the production of HAs by fungi is to inhibit the growth of the surrounding partners to secure an exclusive position in a competitive community.
Collapse
Affiliation(s)
- Guan Pang
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
| | - Tingting Sun
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
| | - Mingyue Ding
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
| | - Jun Li
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
| | - Zheng Zhao
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
| | - Qirong Shen
- Jiangsu Provincial Key Lab for Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving Fertilizers, Nanjing Agricultural University, Nanjing 210095, China
| | - Feng M Cai
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen 518107, China
| |
Collapse
|
10
|
Song J, Campbell L, Vinqvist-Tymchuk M. Application of quantitative proteomics to investigate fruit ripening and eating quality. JOURNAL OF PLANT PHYSIOLOGY 2022; 276:153766. [PMID: 35921768 DOI: 10.1016/j.jplph.2022.153766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 06/30/2022] [Accepted: 07/09/2022] [Indexed: 06/15/2023]
Abstract
The consumption of fruit and vegetables play an important role in human nutrition, dietary diversity and health. Fruit and vegetable industries impart significant impact on our society, economy, and environment, contributing towards sustainable development in both developing and developed countries. The eating quality of fruit is determined by its appearance, color, firmness, flavor, nutritional components, and the absence of defects from physiological disorders. However, all of these components are affected by many pre- and postharvest factors that influence fruit ripening and senescence. Significant efforts have been made to maintain and improve fruit eating quality by expanding our knowledge of fruit ripening and senescence, as well as by controlling and reducing losses. Innovative approaches are required to gain better understanding of the management of eating quality. With completion of the genome sequence for many horticultural products in recent years and development of the proteomic research technique, quantitative proteomic research on fruit is changing rapidly and represents a complementary research platform to address how genetics and environment influence the quality attributes of various produce. Quantiative proteomic research on fruit is advancing from protein abundance and protein quantitation to gene-protein interactions and post-translational modifications of proteins that occur during fruit development, ripening and in response to environmental influences. All of these techniques help to provide a comprehensive understanding of eating quality. This review focuses on current developments in the field as well as limitations and challenges, both in broad term and with specific examples. These examples include our own research experience in applying quantitative proteomic techniques to identify and quantify the protein changes in association with fruit ripening, quality and development of disorders, as well as possible control mechanisms.
Collapse
Affiliation(s)
- Jun Song
- Agriculture and Agri-Food Canada. KRDC, Kentville Research and Development Centre, Kentville, Nova Scotia, B4N 1J5, Canada.
| | - Leslie Campbell
- Agriculture and Agri-Food Canada. KRDC, Kentville Research and Development Centre, Kentville, Nova Scotia, B4N 1J5, Canada
| | - Melinda Vinqvist-Tymchuk
- Agriculture and Agri-Food Canada. KRDC, Kentville Research and Development Centre, Kentville, Nova Scotia, B4N 1J5, Canada
| |
Collapse
|
11
|
Marra R, Lombardi N, Piccolo A, Bazghaleh N, Prashar P, Vandenberg A, Woo S. Mineral Biofortification and Growth Stimulation of Lentil Plants Inoculated with Trichoderma Strains and Metabolites. Microorganisms 2021; 10:87. [PMID: 35056535 PMCID: PMC8779936 DOI: 10.3390/microorganisms10010087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 12/22/2021] [Accepted: 12/30/2021] [Indexed: 12/27/2022] Open
Abstract
Biofortification of crops via agricultural interventions represents an excellent way to supply micronutrients in poor rural populations, who highly suffer from these deficiencies. Soil microbes can directly influence plant growth and productivity, e.g., by contrasting plant pathogens or facilitating micronutrient assimilation in harvested crop-food products. Among these microbial communities, Trichoderma fungi are well-known examples of plant symbionts widely used in agriculture as biofertilizers or biocontrol agents. In this work, eleven Trichoderma strains and/or their bioactive metabolites (BAMs) were applied to lentil plants to evaluate their effects on plant growth and mineral content in greenhouse or field experiments. Our results indicated that, depending upon the different combinations of fungal strain and/or BAM, the mode of treatment (seed and/or watering), as well as the supplementary watering with solutions of iron (Fe) and zinc (Zn), the mineral absorption was differentially affected in treated plants compared with the water controls. In greenhouse conditions, the largest increase in Fe and Zn contents occurred when the compounds were applied to the seeds and the strains (in particular, T. afroharzianum T22, T. harzianum TH1, and T. virens GV41) to the soil. In field experiments, Fe and Zn contents increased in plants treated with T. asperellum strain KV906 or the hydrophobin HYTLO1 compared with controls. Both selected fungal strains and BAMs applications improved seed germination and crop yield. This biotechnology may represent an important challenge for natural biofortification of crops, thus reducing the risk of nutrient deficiencies.
Collapse
Affiliation(s)
- Roberta Marra
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (N.L.); (A.P.)
- Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, 80138 Naples, Italy;
| | - Nadia Lombardi
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (N.L.); (A.P.)
- Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, 80138 Naples, Italy;
| | - Alessandro Piccolo
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (N.L.); (A.P.)
- Interdepartmental Research Centre on Nuclear Magnetic Resonance (NMR) for the Environment, Agro-Food and New Materials (CERMANU), University of Naples Federico II, 80055 Portici, Italy
| | - Navid Bazghaleh
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N5A8, Canada; (N.B.); (P.P.); (A.V.)
| | - Pratibha Prashar
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N5A8, Canada; (N.B.); (P.P.); (A.V.)
| | - Albert Vandenberg
- Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK S7N5A8, Canada; (N.B.); (P.P.); (A.V.)
| | - Sheridan Woo
- Center for Studies on Bioinspired Agro-Environmental Technology (BAT Center), University of Naples Federico II, 80138 Naples, Italy;
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
- National Research Council, Institute for Sustainable Plant Protection, 80055 Portici, Italy
| |
Collapse
|
12
|
Rahim Hateet R, Alag Hassan Z, Abdullah Al-Mussawi A, Rabeea Banoon S. Optimization of cultural conditions affecting improved bioactive metabolite production by endophytic fungus Trichoderma harzianum. BIONATURA 2021. [DOI: 10.21931/rb/2021.06.04.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The present study aimed to optimize cultural conditions for optimum bioactive metabolite production by endophytic fungus Trichoderma harzianum, isolated by surface sterilization method from the leaf of the eucalyptus plant. The fungus was identified based on morphological characterization. Fungal metabolites were carried out by ethyl acetate solvent. The antibacterial activity was tested against Escherichia coli (ATCC 25922) and Staphylococcus aureus (NCTC 6571). Various carbon, nitrogen sources, pH, temperature, incubation period, and NaCl on the antibacterial metabolite production were studied. Bioactive metabolite production of T. harzianum exhibits a broad spectrum of in vitro antibacterial activity against two strains of bacteria. For the optimum production of bioactive metabolites, Dextrose and Glucose were found to be the best sources of carbon and the best sources of Nitrogen Yeast extract (YE) and (NH4)2SO. The maximum production of bioactive metabolites occurs at pH 7 and 25°C.; the NaCl showed a positive influence on bioactive metabolites.
Collapse
Affiliation(s)
- Rashid Rahim Hateet
- Department of Biology, College of Sciences, University of Misan, Amarah, Maysan, Iraq
| | | | | | | |
Collapse
|
13
|
Sinno M, Ranesi M, Di Lelio I, Iacomino G, Becchimanzi A, Barra E, Molisso D, Pennacchio F, Digilio MC, Vitale S, Turrà D, Harizanova V, Lorito M, Woo SL. Selection of Endophytic Beauveria bassiana as a Dual Biocontrol Agent of Tomato Pathogens and Pests. Pathogens 2021; 10:pathogens10101242. [PMID: 34684191 PMCID: PMC8540488 DOI: 10.3390/pathogens10101242] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/03/2021] [Accepted: 09/18/2021] [Indexed: 11/18/2022] Open
Abstract
Endophytic fungi (EF) can enhance both plant growth and defense barriers against pests and pathogens, contributing to the reduction of chemical pesticides and fertilizers use in agriculture. Beauveria bassiana is an entomopathogenic fungus showing endophytism in several crops, often associated with a good capacity to limit the development of pests and disease agents. However, the diversity of the protective efficacy and plant response to different strains can be remarkable and needs to be carefully assessed for the successful and predictable use of these beneficial microorganisms. This study aims to select B. bassiana strains able to colonize tomato plants as endophytes as well as to control two important disease agents, Botrytis cinerea and Alternaria alternata, and the pest aphid, Macrosiphum euphorbiae. Nine wild-type isolates and one commercial strain were screened for endophytism, then further characterized for plant-growth promotion plus inhibition of disease development and pest infestation. Four isolates proved to have a good control activity against the biotic stressors tested, but only Bb716 was also able to promote plant growth. This work provides a simple workflow for the selection of beneficial EF, paving the way towards more effective use of B. bassiana in Integrate Pest Management (IPM) of tomato.
Collapse
Affiliation(s)
- Martina Sinno
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
- Correspondence: ; Tel.: +39-340-9284138
| | - Marta Ranesi
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Ilaria Di Lelio
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Giuseppina Iacomino
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Andrea Becchimanzi
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Eleonora Barra
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Donata Molisso
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Francesco Pennacchio
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Naples, Italy;
| | - Maria Cristina Digilio
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Naples, Italy;
| | - Stefania Vitale
- National Research Council, Institute for Sustainable Plant Protection, 80055 Portici, Italy;
| | - David Turrà
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Naples, Italy;
| | - Vili Harizanova
- Department of Entomology, Agricultural University-Plovdiv, 12, 4000 Plovdiv, Bulgaria;
| | - Matteo Lorito
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy; (M.R.); (I.D.L.); (G.I.); (A.B.); (E.B.); (D.M.); (F.P.); (M.C.D.); (D.T.); (M.L.)
| | - Sheridan Lois Woo
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Naples, Italy;
- Department of Pharmacy, University of Naples Federico II, 80131 Napoli, Italy
- Task Force on Microbiome Studies, University of Naples Federico II, 80131 Naples, Italy
| |
Collapse
|
14
|
Effects of Trichoderma harzianum on Photosynthetic Characteristics and Fruit Quality of Tomato Plants. Int J Mol Sci 2021; 22:ijms22136961. [PMID: 34203436 PMCID: PMC8268988 DOI: 10.3390/ijms22136961] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/20/2021] [Accepted: 06/22/2021] [Indexed: 01/20/2023] Open
Abstract
The beneficial role of fungi from the Trichoderma genus and its secondary metabolites in promoting plant growth, uptake and use efficiency of macronutrients and oligo/micro-nutrients, activation of plant secondary metabolism and plant protection from diseases makes it interesting for application in environmentally friendly agriculture. However, the literature data on the effect of Trichoderma inoculation on tomato fruit quality is scarce. Commercially used tomato cultivars were chosen in combination with indigenous Trichodrema species previously characterized on molecular and biochemical level, to investigate the effect of Trichoderma on photosynthetic characteristics and fruit quality of plants grown in organic system of production. Examined cultivars differed in the majority of examined parameters. Response of cultivar Gružanski zlatni to Trichoderma application was more significant. As a consequence of increased epidermal flavonols and decreased chlorophyll, the nitrogen balance index in leaves has decreased, indicating a shift from primary to secondary metabolism. The quality of its fruit was altered in the sense of increased total flavonoids content, decreased starch, increased Bioaccumulation Index (BI) for Fe and Cr, and decreased BI for heavy metals Ni and Pb. Higher expression of swolenin gene in tomato roots of more responsive tomato cultivar indicates better root colonization, which correlates with observed positive effects of Trichodrema.
Collapse
|
15
|
Liu Q, Tang S, Meng X, Zhu H, Zhu Y, Liu D, Shen Q. Proteomic Analysis Demonstrates a Molecular Dialog Between Trichoderma guizhouense NJAU 4742 and Cucumber ( Cucumis sativus L.) Roots: Role in Promoting Plant Growth. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:631-644. [PMID: 33496609 DOI: 10.1094/mpmi-08-20-0240-r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Trichoderma is a genus of filamentous fungi that play notable roles in stimulating plant growth after colonizing the root surface. However, the key proteins and molecular mechanisms governing this stimulation have not been completely elucidated. In this study, Trichoderma guizhouense NJAU 4742 was investigated in a hydroponic culture system after interacting with cucumber roots. The total proteins of the fungus were characterized, and the key metabolic pathways along with related genes were analyzed through proteomic and transcriptomic analyses. The roles played by the regulated proteins during the interaction between plants and NJAU 4742 were further examined. The intracellular or extracellular proteins from NJAU 4742 and extracellular proteins from cucumber were quantified, and the high-abundance proteins were determined which were primarily involved in the shikimate pathway (tryptophan, tyrosine, and phenylalanine metabolism, auxin biosynthesis, and secondary metabolite synthesis). Moreover, 15N-KNO3 labeling analysis indicated that NJAU 4742 had a strong ability to convert nitrogenous amino acids, nitrate, nitrile, and amines into ammonia. The auxin synthesis and ammonification metabolism pathways of NJAU 4742 significantly contributed to plant growth. The results of this study demonstrated the crucial metabolic pathways involved in the interactions between Trichoderma spp. and plants.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
Collapse
Affiliation(s)
- Qiumei Liu
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| | - Siyu Tang
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| | - Xiaohui Meng
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| | - Han Zhu
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| | - Yiyong Zhu
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| | - Dongyang Liu
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| | - Qirong Shen
- Jiangsu Provincial Key Lab of Solid Organic Waste Utilization, Jiangsu Collaborative Innovation Center of Solid Organic Wastes, Educational Ministry Engineering Center of Resource-saving fertilizers, Nanjing Agricultural University, Nanjing 210095, Jiangsu, Peoples Republic of China
| |
Collapse
|
16
|
Trichoderma spp. and Mulching Films Differentially Boost Qualitative and Quantitative Aspects of Greenhouse Lettuce under Diverse N Conditions. HORTICULTURAE 2020. [DOI: 10.3390/horticulturae6030055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The global increasing demand of lettuce is pushing farmers to boost their production through several technical means, including mulching and nitrogen fertilization. However, from an environmental protection perspective, the role of scientific research is to limit the excessive use of some chemical approaches. This research aims to evaluate the possible effects of two mulching films (black polyethylene, PE, and brown photoselective film, BF) and two treatments with a plant growth-promoting product, containing Trichoderma spp., (non-treated, - Control and treated with RYZO PEP UP, - TR), on the productive and qualitative traits of lettuce grown under four regimes of nitrogen (0, 30, 60 and 90 kg ha−1, N0, N30, N60, and N90, respectively). The marketable yield increased at higher nitrogen levels, but without differences between the N60 and N90 doses. The photoselective film elicited marketable yield, with an 8% increase over PE. N fertilization also improved photochemical efficiency (higher Soil Plant Analysis Development and chlorophyllous pigments biosynthesis), as well as antioxidant activities (lipophilic—LAA and hydrophilic—HAA) and bioactive compounds (phenols and total ascorbic acid—TAA). Interestingly, Trichoderma spp. had a positive effect on these qualitative parameters, especially when combined with mulching films, where the increase generated by PE-TR treatment over the all other treatments was 16.3% and 16.8% for LAA and HHA, respectively. In all treatments, the nitrate leaves content was consistently always within the legal limit imposed by the European community. Overall, although Trichoderma spp. did not engender a marked effect on yield, probably due to the short crop cycle, its positive effect on some quality traits is an interesting starting point for further research.
Collapse
|