1
|
Zhang Z, Sui L, Tian Y, Lu Y, Xia X, Liu W, Cheng K, Li Q, Shi W. Metarhizium rileyi with broad-spectrum insecticidal ability confers resistance against phytopathogens and insect pests as a phytoendophyte. PEST MANAGEMENT SCIENCE 2024. [PMID: 38358040 DOI: 10.1002/ps.8027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 01/19/2024] [Accepted: 02/15/2024] [Indexed: 02/16/2024]
Abstract
BACKGROUND Entomophagous fungi (EPF) not only directly kill insect pests, but also colonize plants and improve their resistance against pests. However, most previous research has focused on Beauveria bassiana and Metarhizium anisopliae, and there are few reports on whether other EPF can enhance resistance against pests via endogenous colonization. Herein, an EPF strain was isolated from diseased larvae of Spodoptera litura in a soybean field, and subjected to genome-wide sequencing at the chromosomal level. The pathogenicity of the isolate toward various pest insects was evaluated, and the ability to colonize plants and induce resistance against phytopathogens and insect pests was tested. RESULTS The purified isolate was identified as M. rileyi and designated MrS1Gz1-1. Biological assays revealed its strong pathogenicity toward five insect pests belonging to Lepidoptera and Hemiptera. Furthermore, the strain inhibited the growth of soil-borne plant disease caused by Sclerotinia sclerotiorum in vitro. It colonized plants as an endophyte via soil application, thereby inducing plant resistance-related genes against phytopathogen infection, and it disrupted the feeding selectivity of S. litura larvae. CONCLUSION M. rileyi MrS1Gz1-1 has potential as a broad-spectrum microbial control agent that can induce resistance against phytopathogens and insect pests feeding as an endotype. The complete genome provides a valuable resource for exploring host interactions. © 2024 Society of Chemical Industry.
Collapse
Affiliation(s)
- Zhengkun Zhang
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Jilin Key Laboratory of Agricultural Microbiology, Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Li Sui
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Jilin Key Laboratory of Agricultural Microbiology, Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Yifan Tian
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Jilin Key Laboratory of Agricultural Microbiology, Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Yang Lu
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Jilin Key Laboratory of Agricultural Microbiology, Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Xinyao Xia
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wende Liu
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ke Cheng
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Jilin Key Laboratory of Agricultural Microbiology, Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Qiyun Li
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Jilin Key Laboratory of Agricultural Microbiology, Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
- Jilin Agricultural Science and Technology University, Jilin, P. R. China
| | - Wangpeng Shi
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
| |
Collapse
|
2
|
Qin X, Xu J, An X, Yang J, Wang Y, Dou M, Wang M, Huang J, Fu Y. Insight of endophytic fungi promoting the growth and development of woody plants. Crit Rev Biotechnol 2024; 44:78-99. [PMID: 36592988 DOI: 10.1080/07388551.2022.2129579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/04/2022] [Accepted: 04/16/2022] [Indexed: 01/04/2023]
Abstract
Microorganisms play an important role in plant growth and development. In particular, endophytic fungi is one of the important kinds of microorganisms and has a mutually beneficial symbiotic relationship with host plants. Endophytic fungi have many substantial benefits to host plants, especially for woody plants, such as accelerating plant growth, enhancing stress resistance, promoting nutrient absorption, resisting pathogens and etc. However, the effects of endophytic fungi on the growth and development of woody plants have not been systematically summarized. In this review, the functions of endophytic fungi for the growth and development of woody plants have been mainly reviewed, including regulating plant growth (e.g., flowering, root elongation, etc.) by producing nutrients and plant hormones, and improving plant disease, insect resistance and heavy metal resistance by producing secondary metabolites. In addition, the diversity of endophytic fungi could improve the ability of woody plants to adapt to adverse environment. The components produced by endophytic fungi have excellent potential for the growth and development of woody plants. This review has systematically discussed the potential regulation mechanism of endophytic fungi regulating the growth and development of woody plants, it would be of great significance for the development and utilization of endophytic fungi resource from woody plants for the protection of forest resources.
Collapse
Affiliation(s)
- Xiangyu Qin
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Jian Xu
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Xiaoli An
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Jie Yang
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Yao Wang
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Meijia Dou
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Minggang Wang
- The College of Forestry, Beijing Forestry University, Beijing, PR China
| | - Jin Huang
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, PR China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, PR China
| | - Yujie Fu
- The College of Forestry, Beijing Forestry University, Beijing, PR China
| |
Collapse
|
3
|
Ali S, Wright AH, Tanney JB, Renaud JB, Sumarah MW. Fungal Endophytes: Discovering What Lies within Some of Canada's Oldest and Most Resilient Grapevines. J Fungi (Basel) 2024; 10:105. [PMID: 38392777 PMCID: PMC10890244 DOI: 10.3390/jof10020105] [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: 12/07/2023] [Revised: 01/10/2024] [Accepted: 01/17/2024] [Indexed: 02/24/2024] Open
Abstract
Plant diseases and pests reduce crop yields, accounting for global crop losses of 30% to 50%. In conventional agricultural production systems, these losses are typically controlled by applying chemical pesticides. However, public pressure is mounting to curtail agrochemical use. In this context, employing beneficial endophytic microorganisms is an increasingly attractive alternative to the use of conventional chemical pesticides in agriculture. A multitude of fungal endophytes are naturally present in plants, producing enzymes, small peptides, and secondary metabolites due to their bioactivity, which can protect hosts from pathogens, pests, and abiotic stresses. The use of beneficial endophytic microorganisms in agriculture is an increasingly attractive alternative to conventional pesticides. The aim of this study was to characterize fungal endophytes isolated from apparently healthy, feral wine grapes in eastern Canada that have grown without agrochemical inputs for decades. Host plants ranged from unknown seedlings to long-lost cultivars not widely propagated since the 1800s. HPLC-MS was used to identify unique endophyte-derived chemical compounds in the host plants, while dual-culture competition assays showed a range in endophytes' ability to suppress the mycelial growth of Botrytis, which is typically controlled in viticulture with pesticides. Twelve of the most promising fungal endophytes isolated were identified using multilocus sequencing and morphology, while DNA barcoding was employed to identify some of their host vines. These fungal endophyte isolates, which consisted of both known and putative novel strains, belonged to seven genera in six families and five orders of Ascomycota. Exploring the fungal endophytes in these specimens may yield clues to the vines' survival and lead to the discovery of novel biocontrol agents.
Collapse
Affiliation(s)
- Shawkat Ali
- Agriculture and Agri-Food Canada, Kentville Research and Development Centre, 32 Main St., Kentville, NS B4N 1J5, Canada
| | - A Harrison Wright
- Agriculture and Agri-Food Canada, Kentville Research and Development Centre, 32 Main St., Kentville, NS B4N 1J5, Canada
| | - Joey B Tanney
- Natural Resources Canada, Pacific Forestry Centre, 506 Burnside Road West, Victoria, BC V8Z 1M5, Canada
| | - Justin B Renaud
- Agriculture and Agri-Food Canada, London Research and Development Centre, 1391 Sandford St., London, ON N5V 4T3, Canada
| | - Mark W Sumarah
- Agriculture and Agri-Food Canada, London Research and Development Centre, 1391 Sandford St., London, ON N5V 4T3, Canada
| |
Collapse
|
4
|
Zhang Z, Tian Y, Sui L, Lu Y, Cheng K, Zhao Y, Li Q, Shi W. First record of Aspergillus nomiae as a broad-spectrum entomopathogenic fungus that provides resistance against phytopathogens and insect pests by colonization of plants. Front Microbiol 2024; 14:1284276. [PMID: 38260878 PMCID: PMC10801167 DOI: 10.3389/fmicb.2023.1284276] [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: 08/28/2023] [Accepted: 12/13/2023] [Indexed: 01/24/2024] Open
Abstract
Introduction Aspergillus nomiae is known as a pathogenic fungus that infects humans and plants but has never been reported as an entomophagous fungus (EPF) that can provide other functions as an endotype. Methods A strain of EPF was isolated and identified from diseased larvae of Spodoptera litura in a soybean field and designated AnS1Gzl-1. Pathogenicity of the strain toward various insect pests was evaluated, especially the ability to colonize plants and induce resistance against phytopathogens and insect pests. Results The isolated EPF strain AnS1Gzl-1 was identified as A. nomiae; it showed strong pathogenicity toward five insect pests belonging to Lepidoptera and Hemiptera. Furthermore, the strain inhibited the growth of Sclerotinia sclerotiorum in vitro, a causal agent of soil-borne plant disease. It colonized plants as an endophyte via root irrigation with a high colonization rate of 90%, thereby inducing plant resistance against phytopathogen infection, and disrupting the feeding selectivity of S. litura larvae. Discussion This is the first record of a natural infection of A. nomiae on insects. A. nomiae has the potential to be used as a dual biocontrol EPF because of its ability to not only kill a broad spectrum of insect pests directly but also induce resistance against phytopathogens via plant colonization.
Collapse
Affiliation(s)
- Zhengkun Zhang
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Yifan Tian
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
| | - Li Sui
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Yang Lu
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Ke Cheng
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Yu Zhao
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
| | - Qiyun Li
- Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Changchun, China
- Jilin Key Laboratory of Agricultural Microbiology, Changchun, China
- Key Laboratory of Integrated Pest Management on Crops in Northeast China, Ministry of Agriculture and Rural Areas, Changchun, China
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
- Jilin Agricultural Science and Technology University, Jilin, China
| | - Wangpeng Shi
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, China
| |
Collapse
|
5
|
Zhong J, Chen S, Lin S, Jia Y, Li H, Zhan T, Li J. Obtainment and Inoculation of Acinetobacter pittii Strain JJ-2, and Combined Action with Plants for Formaldehyde and CO 2 Removal: A Research Study. Curr Microbiol 2023; 81:31. [PMID: 38062219 DOI: 10.1007/s00284-023-03536-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/22/2023] [Indexed: 12/18/2023]
Abstract
A formaldehyde-degrading bacterium JJ-2 was isolated from the rhizosphere of Chlorophytum and identified as Acinetobacter pittii by colony morphology and 16S rDNA sequence analysis. Further studies showed that under optimal conditions, JJ-2 could maintain activity for six cycles at an initial formaldehyde concentration of 450 mg L-1. At the same time, the complete degradation time was shortened from 12 to 6 h. When the JJ-2 strain was inoculated into sterile soil, the surface spray method had the best effect, and the removal efficiency of 5 ppm formaldehyde increased by 22.63%. In an actual potted plants system colonized with strain JJ-2, the first and second fumigations (without re-inoculation) increased removal by 1.36 times and 0.92 times during the day and 1.27 times and 2.07 times at night. In addition, in the second fumigation, the plant-bacteria combined system was 693.63 ppm and the plant system was 715.34 ppm, effectively reducing the CO2 concentration. This study provides an economical, ecological, and efficient approach to improve the combined system of plants and bacteria to remove gaseous formaldehyde from indoor air, with a positive impact on carbon neutrality.
Collapse
Affiliation(s)
- Jiaochan Zhong
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China
| | - Silan Chen
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China
| | - Shujie Lin
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China
| | - Yinjuan Jia
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China
| | - Han Li
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China
| | - Ting Zhan
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China
| | - Jian Li
- School of Environmental and Chemical Engineering, Nanchang Hangkong University, No. 696 South Fenghe Ave., Nanchang, 330063, Jiangxi, China.
| |
Collapse
|
6
|
Bandeira JB, Rodrigues JN, de Oliveira RS, Pinto IO, Chagas-Júnior AF, Nascimento VL, Sarmento MI, de Moraes CB, Sarmento RA. Endophytic colonization of five Trichoderma species and their effects on growth of a Eucalyptus hybrid. Braz J Microbiol 2023; 54:3113-3125. [PMID: 37661212 PMCID: PMC10689710 DOI: 10.1007/s42770-023-01112-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 08/22/2023] [Indexed: 09/05/2023] Open
Abstract
The study aimed to evaluate the effectiveness of endophytic colonization via leaf and root inoculation of five Trichoderma species in a Eucalyptus hybrid, as well as the effects of inoculation on plant growth. The experimental design was completely randomized in a 6 × 2 factorial scheme. Plant growth was evaluated during the experimental period at three different times: 20 days after inoculation (d.a.i), 40 d.a.i., and 60 d.a.i. A statistical difference was observed between the inoculation methods during each period and between the Trichoderma species. Plants inoculated with T. asperellum showed the greatest growth among the treatments. Root-inoculated plants produced the greatest growth response. This showed that the presence of Trichoderma in the roots assisted in nutrient assimilation, promoted greater plant growth, when compared with leaf-inoculated plants. Evaluation of the effectiveness of endophytic colonization was performed at each sampling period by collecting leaf samples, and at 60 d.a.i., by collecting leaf, stem, and root samples. T. longibrachiatum and T. harzianum were isolated from leaves at 20 d.a.i., with an increase in the number of colonized plants throughout the evaluation of leaf-inoculated plants. In root-inoculated plants, treatment with T. longibrachiatum, T. harzianum, and T. asperellum presented the highest endophytic colonization in the stem and root samples (at 60 d.a.i.).
Collapse
Affiliation(s)
- Jéssica Bezerra Bandeira
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Jovielly Neves Rodrigues
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Rodrigo Silva de Oliveira
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Ismael Oliveira Pinto
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
- Setor de Agricultura, Instituto Federal do Tocantins (IFTO)-Campus Avançado Formoso do Araguaia, Formoso do Araguaia, TO, 77470-000, Brazil
| | - Aloísio Freitas Chagas-Júnior
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Vitor L Nascimento
- Setor de Fisiologia Vegetal-Departamento de Biologia, Universidade Federal de Lavras (UFLA), Lavras, MG, 37200-900, Brazil
| | - Maíra Ignacio Sarmento
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Cristiano Bueno de Moraes
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil
| | - Renato Almeida Sarmento
- Programa de Pós-Graduação em Ciências Florestais e Ambientais, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil.
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins (UFT)-Campus Gurupi, Gurupi, TO, 77402-970, Brazil.
| |
Collapse
|
7
|
Quesada-Moraga E, Garrido-Jurado I, González-Mas N, Yousef-Yousef M. Ecosystem services of entomopathogenic ascomycetes. J Invertebr Pathol 2023; 201:108015. [PMID: 37924859 DOI: 10.1016/j.jip.2023.108015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 10/27/2023] [Accepted: 10/31/2023] [Indexed: 11/06/2023]
Abstract
Entomopathogenic ascomycetes (EA) are an important part of the microbiota in most terrestrial ecosystems, where they can be found regulating natural populations of arthropod pests in both epigeous and hypogeous habitats while also establishing unique relationships with plants. These fungi offer direct benefits to agriculture and human welfare. In the present work, we conducted a systematic review to comprehensively assess the range of ecosystem services provided by EA, including direct and indirect pest biocontrol, plant growth promotion, plant defense against other biotic and abiotic stresses, nutrient cycling, and the production of new bioactive compounds with agricultural, pharmaceutical and medical importance. Moreover, EA are compatible with the ecosystem services provided by other microbial and macrobial biocontrol agents. This systematic review identified the need for future research to focus on evaluating the economic value of the ecological services provided by EA with a special emphasis on hypocrealean fungi. This evaluation is essential not only for the conservation but also for better regulation and exploitation of the benefits of EA in promoting agricultural sustainability, reducing the use of chemicals that enter the environment, and minimizing the negative impacts of crop protection on the carbon footprint and human health.
Collapse
Affiliation(s)
- Enrique Quesada-Moraga
- Department of Agronomy, Maria de Maeztu Excellence Unit DAUCO, ETSIAM, University of Cordoba, Edificio C4 Celestino Mutis, Campus de Rabanales, 14071 Cordoba, Spain.
| | - Inmaculada Garrido-Jurado
- Department of Agronomy, Maria de Maeztu Excellence Unit DAUCO, ETSIAM, University of Cordoba, Edificio C4 Celestino Mutis, Campus de Rabanales, 14071 Cordoba, Spain
| | - Natalia González-Mas
- Department of Agronomy, Maria de Maeztu Excellence Unit DAUCO, ETSIAM, University of Cordoba, Edificio C4 Celestino Mutis, Campus de Rabanales, 14071 Cordoba, Spain
| | - Meelad Yousef-Yousef
- Department of Agronomy, Maria de Maeztu Excellence Unit DAUCO, ETSIAM, University of Cordoba, Edificio C4 Celestino Mutis, Campus de Rabanales, 14071 Cordoba, Spain
| |
Collapse
|
8
|
Kinyungu SW, Agbessenou A, Subramanian S, Khamis FM, Akutse KS. One stone for two birds: Endophytic fungi promote maize seedlings growth and negatively impact the life history parameters of the fall armyworm, Spodoptera frugiperda. Front Physiol 2023; 14:1253305. [PMID: 37900958 PMCID: PMC10600476 DOI: 10.3389/fphys.2023.1253305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/29/2023] [Indexed: 10/31/2023] Open
Abstract
The fall armyworm (FAW) Spodoptera frugiperda, is a voracious pest of cereals native to the Americas and which invaded Africa in 2016. Chemical control is the main management option, which however remains ineffective and unsustainable. Fungal endophytes are increasingly used as alternative for the management of insect pests of economic importance. This study assessed the potential of eight endophytic fungal isolates to colonize maize plant and their ability to promote seedlings growth through seed and foliar inoculations, as well as their suppressive effects on FAW. Fungal colonization rates of different plant parts by the endophytes varied as per the inoculation methods. Beauveria bassiana ICIPE 279 colonized more than 60% of all the seedling parts while B. bassiana G1LU3 only colonized stem (25%) and leaf (5%) tissues through foliar inoculation. Trichoderma atroviride F2S21, T. asperellum M2RT4, T. harzianum F2R41, Trichoderma sp. F2L41, Hypocrea lixii F3ST1 and Fusarium proliferatum F2S51 successfully colonized all the plant parts and therefore were selected and further evaluated through seed inoculation for their endophytic persistence, effect on plant growth, and pathogenicity to Spodoptera frugiperda immature and adult stages. Weekly assessment showed varied effect of the endophytes on maize plant growth parameters compared to the control. During the first week, percentage colonization of the plant parts ranges between 90%-100%, 65%-100%, and 60%-100%, in the roots, stems, and leaves, respectively for all the five tested isolates. However, the colonization pattern/rates significantly decreased over time for H. lixii F3ST1 in the stems and leaves, and for T. harzianum F2R41 in the leaves and for T. asperellum M2RT4 in the roots. In addition, T. harzianum F2R41 outperformed all the other isolates in boosting the plant height, whereas H. lixii F3ST1 and T. asperellum M2RT4 outperformed all the other isolates in increasing the wet and dry shoots weight. Furthermore, the number of egg masses laid on endophytically-colonized maize plants varied among the treatments. Trichoderma asperellum M2RT4 and H. lixii F3ST1 endophytically-colonized maize plants significantly reduced the number of egg masses and the defoliation/feeding rates of the pest compared to the control. Additionally, T. harzianum F2R41 had the highest negative impact on the pupation and adult emergence of S. frugiperda with a female-biased sex ratio. Our findings indicate that T. asperellum M2RT4, T. harzianum F2R41, and H. lixii F3ST1 hold a potential to be developed as endophytic-fungal-based biopesticides for sustainable management of S. frugiperda and as plant growth promoters.
Collapse
Affiliation(s)
- Sharon W. Kinyungu
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Ayaovi Agbessenou
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
- Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Biological Control, Dossenheim, Germany
- Center for Development Research (ZEF), Department of Ecology and Natural Resources Management, University of Bonn, Bonn, Germany
| | - Sevgan Subramanian
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Fathiya M. Khamis
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Komivi S. Akutse
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
- Unit of Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| |
Collapse
|
9
|
Bamisile BS, Afolabi OG, Siddiqui JA, Xu Y. Endophytic insect pathogenic fungi-host plant-herbivore mutualism: elucidating the mechanisms involved in the tripartite interactions. World J Microbiol Biotechnol 2023; 39:326. [PMID: 37776438 DOI: 10.1007/s11274-023-03780-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 09/22/2023] [Indexed: 10/02/2023]
Abstract
Various techniques used by crop plants to evade insect pests and pathogen attacks have been documented. Among these, plant defense strategies induced by endophytic insect pathogenic fungi are arguably one of the most discussed. Endophytic fungi frequently colonize plants and inhabit their internal tissues for a portion of their lifespan without producing visible symptoms of the disease. This phenomenon is widespread and diverse in both natural and agricultural ecosystems, and is present in almost all plant organs. Many fungi can obtain nutrients by infecting and killing insects, and this ability has been developed numerous times in different fungal lineages. These species mainly consist of those in the order Hypocreales (Ascomycota), where the generalist insect pathogens, Beauveria sp. (Cordycipitaceae) and Metarhizium sp. (Clavicipitaceae) are two of the most studied endophytic entomopathogenic fungal genera. However, most fungi that kill insects do not survive in the tissues of living plants. The data published thus far show a high degree of variability and do not provide consistent explanations for the underlying mechanisms that may be responsible for these effects. This implies that available knowledge regarding the colonization of plant tissues by endophytic insect pathogenic fungi, the effects of colonization on plant metabolism, and how this contributes to a decrease in herbivore and pathogens damage is limited. To adequately utilize fungal-based products as biological control agents, these products must be effective and the reduction of pests and infection must be consistent and similar to that of chemical insecticides after application. This article discusses this possibility and highlights the benefits and the specific techniques utilized by endophytically challenged plants in invading insect pests and disease pathogens.
Collapse
Affiliation(s)
- Bamisope Steve Bamisile
- Department of Entomology, South China Agricultural University, Guangzhou, 510642, China
- Henry Fok School of Biology and Agriculture, Shaoguan University, Shaoguan, 512005, China
| | | | - Junaid Ali Siddiqui
- College of Agriculture, College of Tobacco Science, Guizhou University, Guiyang, 550025, China
| | - Yijuan Xu
- Department of Entomology, South China Agricultural University, Guangzhou, 510642, China.
| |
Collapse
|
10
|
Cheng CY, Zhang MY, Niu YC, Zhang M, Geng YH, Deng H. Comparison of Fungal Genera Isolated from Cucumber Plants and Rhizosphere Soil by Using Various Cultural Media. J Fungi (Basel) 2023; 9:934. [PMID: 37755042 PMCID: PMC10532442 DOI: 10.3390/jof9090934] [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: 06/09/2023] [Revised: 09/06/2023] [Accepted: 09/11/2023] [Indexed: 09/28/2023] Open
Abstract
Plant endophytic fungi and rhizosphere soil fungi are often reported as biocontrol agents against plant pathogens or with plant growth promotion potential. Four treatments were performed in field and greenhouse experiments where cucumber plants were inoculated with Trichoderma harzianum and Fusarium oxysporum in 2022. The roots, stems and leaves of cucumber plants and their rhizosphere soil were collected twice individually from the field and greenhouse for isolation of cucumber endophytic and rhizosphere soil fungi. All fungal strains were identified through sequence similarity of the ITS1-5.8s-ITS2 rDNA region. The potato dextrose agar (PDA) media yielded the highest number of genera isolated from cucumber plants, rhizosphere soil and both compared to other media. There were no significant differences among the four media for the isolation of all cucumber endophytic fungi. However, in the roots, the number of endophytic fungi isolated by MRBA was significantly higher than that isolated on malt extract agar (MEA), while in the stems, the number of fungi isolated with PDA was significantly higher than that isolated with Martin's rose bengal agar medium (MRBA). PDA had significantly higher isolation efficiency for the rhizosphere soil fungi than MRBA. The 28 fungal genera had high isolation efficiency, and the endophytic Trichoderma strains were significantly more isolated by MEA than those of MRBA. It is suggested that PDA can be used as a basic medium, and different cultural media can be considered for specific fungal genera.
Collapse
Affiliation(s)
- Chong-Yang Cheng
- Plant Protection College, Henan Agricultural University, No. 95 Wen-Hua Road, Zhengzhou 450002, China; (C.-Y.C.); (M.Z.)
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China; (M.-Y.Z.); (Y.-C.N.)
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China
| | - Ming-Yuan Zhang
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China; (M.-Y.Z.); (Y.-C.N.)
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China
| | - Yong-Chun Niu
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China; (M.-Y.Z.); (Y.-C.N.)
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China
| | - Meng Zhang
- Plant Protection College, Henan Agricultural University, No. 95 Wen-Hua Road, Zhengzhou 450002, China; (C.-Y.C.); (M.Z.)
| | - Yue-Hua Geng
- Plant Protection College, Henan Agricultural University, No. 95 Wen-Hua Road, Zhengzhou 450002, China; (C.-Y.C.); (M.Z.)
| | - Hui Deng
- State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China; (M.-Y.Z.); (Y.-C.N.)
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, No. 12 Zhongguancun South Street, Beijing 100081, China
| |
Collapse
|
11
|
García-Espinoza F, García MJ, Quesada-Moraga E, Yousef-Yousef M. Entomopathogenic Fungus-Related Priming Defense Mechanisms in Cucurbits Impact Spodoptera littoralis (Boisduval) Fitness. Appl Environ Microbiol 2023; 89:e0094023. [PMID: 37439674 PMCID: PMC10467339 DOI: 10.1128/aem.00940-23] [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: 06/06/2023] [Accepted: 06/25/2023] [Indexed: 07/14/2023] Open
Abstract
Entomopathogenic fungi (EPF) exhibit direct and indirect mechanisms to increase plant resistance against biotic and abiotic stresses. Plant responses to these stresses are interconnected by common regulators such as ethylene (ET), which is involved in both iron (Fe) deficiency and induced systemic resistance responses. In this work, the roots of cucurbit seedlings were primed with Metarhizium brunneum (EAMa 01/58-Su strain), and relative expression levels of 18 genes related to ethylene (ET), jasmonic acid (JA), and salicylic acid (SA) synthesis, as well as pathogen-related (PR) protein genes, were studied by reverse transcription-quantitative PCR (qRT-PCR). Effects of priming on Spodoptera littoralis were studied by feeding larvae for 15 days with primed and control plants. Genes showed upregulation in studied species; however, the highest relative expression was observed in roots and shoots of plants with Fe deficiency, demonstrating the complexity and the overlapping degree of the regulatory network. EIN2 and EIN3 should be highlighted; both are key genes of the ET transduction pathway that enhanced their expression levels up to eight and four times, respectively, in shoots of primed cucumber. Also, JA and SA synthesis and PR genes showed significant upregulation during the observation period (e.g., the JA gene LOX1 increased 506 times). Survival and fitness of S. littoralis were affected with significant effects on mortality of larvae fed on primed plants versus controls, length of the larval stage, pupal weight, and the percentage of abnormal pupae. These results highlight the role of the EAMa 01/58-Su strain in the induction of resistance, which could be translated into direct benefits for plant development. IMPORTANCE Entomopathogenic fungi are multipurpose microorganisms with direct and indirect effects on insect pests. Also, EPF provide multiple benefits to plants by solubilizing minerals and facilitating nutrient acquisition. A very interesting and novel effect of these fungi is the enhancement of plant defense systems by inducing systematic and acquired resistance. However, little is known about this function. This study sheds light on the molecular mechanisms involved in cucurbits plants' defense activation after being primed by the EPF M. brunneum. Furthermore, the subsequent effects on the fitness of the lepidopteran pest S. littoralis are shown. In this regard, a significant upregulation was recorded for the genes that regulate JA, SA, and ET pathways. This increased expression of defense genes caused lethal and sublethal effects on S. littoralis. This could be considered an added value for the implementation of EPF in integrated pest management programs.
Collapse
Affiliation(s)
- F. García-Espinoza
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2023, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
- Departamento de Parasitología. Universidad Autónoma Agraria Antonio Narro – Unidad Laguna, Torreón, Coahuila, Mexico
| | - M. J. García
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2023, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - E. Quesada-Moraga
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2023, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| | - M. Yousef-Yousef
- Departamento de Agronomía (DAUCO) María de Maeztu Unit of Excellence 2021–2023, Campus de Rabanales, Universidad de Córdoba, Córdoba, Spain
| |
Collapse
|
12
|
Rasool S, Markou A, Hannula SE, Biere A. Effects of tomato inoculation with the entomopathogenic fungus Metarhizium brunneum on spider mite resistance and the rhizosphere microbial community. Front Microbiol 2023; 14:1197770. [PMID: 37293220 PMCID: PMC10244576 DOI: 10.3389/fmicb.2023.1197770] [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: 03/31/2023] [Accepted: 05/05/2023] [Indexed: 06/10/2023] Open
Abstract
Entomopathogenic fungi have been well exploited as biocontrol agents that can kill insects through direct contact. However, recent research has shown that they can also play an important role as plant endophytes, stimulating plant growth, and indirectly suppressing pest populations. In this study, we examined the indirect, plant-mediated, effects of a strain of entomopathogenic fungus, Metarhizium brunneum on plant growth and population growth of two-spotted spider mites (Tetranychus urticae) in tomato, using different inoculation methods (seed treatment, soil drenching and a combination of both). Furthermore, we investigated changes in tomato leaf metabolites (sugars and phenolics), and rhizosphere microbial communities in response to M. brunneum inoculation and spider mite feeding. A significant reduction in spider mite population growth was observed in response to M. brunneum inoculation. The reduction was strongest when the inoculum was supplied both as seed treatment and soil drench. This combination treatment also yielded the highest shoot and root biomass in both spider mite-infested and non-infested plants, while spider mite infestation increased shoot but reduced root biomass. Fungal treatments did not consistently affect leaf chlorogenic acid and rutin concentrations, but M. brunneum inoculation via a combination of seed treatment and soil drenching reinforced chlorogenic acid (CGA) induction in response to spider mites and under these conditions the strongest spider mite resistance was observed. However, it is unclear whether the M. brunneum-induced increase in CGA contributed to the observed spider mite resistance, as no general association between CGA levels and spider mite resistance was observed. Spider mite infestation resulted in up to two-fold increase in leaf sucrose concentrations and a three to five-fold increase in glucose and fructose concentrations, but these concentrations were not affected by fungal inoculation. Metarhizium, especially when applied as soil drench, impacted the fungal community composition but not the bacterial community composition which was only affected by the presence of spider mites. Our results suggest that in addition to directly killing spider mites, M. brunneum can indirectly suppress spider mite populations on tomato, although the underlying mechanism has not yet been resolved, and can also affect the composition of the soil microbial community.
Collapse
Affiliation(s)
- Shumaila Rasool
- Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands
| | - Andreas Markou
- Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands
| | - S. Emilia Hannula
- Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands
- Institute of Environmental Sciences, Leiden University, Leiden, Netherlands
| | - Arjen Biere
- Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, Netherlands
| |
Collapse
|
13
|
Wang Z, Wang L, Pan Y, Zheng X, Liang X, Sheng L, Zhang D, Sun Q, Wang Q. Research advances on endophytic fungi and their bioactive metabolites. Bioprocess Biosyst Eng 2023; 46:165-170. [PMID: 36565343 DOI: 10.1007/s00449-022-02840-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/11/2022] [Indexed: 12/25/2022]
Abstract
Endophytic fungi, as a kind of fungi living in the healthy plant tissues and organs, are important sources of natural bioactive products and new microbial resources with high developing value. Therefore, exploration and utilization of endophytic fungi can not only alleviate the problems of resource shortage and ecological balance destruction caused by extracting large number of useful bioactive products from natural plants, but also benefit the protection of rare and endangered plant resources, which is of great significance and economic value. This review mainly expounds the concept of endophytic fungi, analyzes the research advances of endophytic fungi from antioxidant, antibacterial, insecticidal, regulating plant growth, anticancer and antitumor bioactivities and, furthermore, summarizes the existing problems in present research of endophytic fungi and corresponding solutions. We hope that this review could provide references for the development and utilization of endophytic fungi and their bioactive metabolites.
Collapse
Affiliation(s)
- Zichao Wang
- National Engineering Laboratory/Key Laboratory of Henan Province, Henan University of Technology, Zhengzhou, 450001, China.,School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Lu Wang
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Yaping Pan
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Xinxin Zheng
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Xiaona Liang
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Lili Sheng
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Di Zhang
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Qi Sun
- College of Life Sciences, Chongqing Normal University, Chongqing, 401331, China.
| | - Qi Wang
- School of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China.
| |
Collapse
|
14
|
Ponchon M, Reineke A, Massot M, Bidochka MJ, Thiéry D, Papura D. Three Methods Assessing the Association of the Endophytic Entomopathogenic Fungus Metarhizium robertsii with Non-Grafted Grapevine Vitis vinifera. Microorganisms 2022; 10:microorganisms10122437. [PMID: 36557691 PMCID: PMC9787814 DOI: 10.3390/microorganisms10122437] [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: 11/07/2022] [Revised: 12/03/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022] Open
Abstract
Characterizing the association of endophytic insect pathogenic fungi (EIPF) with plants is an important step in order to understand their ecology before using them in biological control programs. Since several methods are available, it is challenging to identify the most appropriate for such investigations. Here, we used two strains of Metarhizium robertsii: EF3.5(2) native to the French vineyard environment and ARSEF-2575-GFP a laboratory strain expressing a green fluorescent protein, to compare their potential of association with non-grafted grapevine Vitis vinifera. Three methods were used to evaluate the kinetics of rhizosphere and grapevine endospheric colonization: (i) Droplet Digital (ddPCR), a sensitive molecular method of M. robertsii DNA quantification in different plant parts, (ii) culture-based method to detect the live fungal propagules from plant tissues that grew on the medium, (iii) confocal imaging to observe roots segments. Both strains showed evidence of establishment in the rhizosphere of grapevines according to the culture-based and ddPCR methods, with a significantly higher establishment of strain EF3.5(2) (40% positive plants and quantified median of exp(4.61) c/μL) compared to strain ARSEF-2575-GFP (13% positive plants and quantified median of exp(2.25) c/μL) at 96-98 days post-inoculation. A low incidence of association of both strains in the grapevine root endosphere was found with no significant differences between strains and evaluation methods (15% positive plants inoculated with strain EF3.5(2) and 5% with strain ARSEF-2575-GFP according to culture-based method). ddPCR should be used more extensively to investigate the association between plants and EIPF but always accompanied with at least one method such as culture-based method or confocal microscopy.
Collapse
Affiliation(s)
- Mathilde Ponchon
- Department of Crop Protection, Hochschule Geisenheim University, 65366 Geisenheim, Germany
- INRAE, Bordeaux Sciences Agro, ISVV, UMR SAVE, 33140 Villenave d’Ornon, France
| | - Annette Reineke
- Department of Crop Protection, Hochschule Geisenheim University, 65366 Geisenheim, Germany
| | - Marie Massot
- INRAE, Univ. Bordeaux, UMR BIOGECO, 33610 Cestas, France
| | - Michael J. Bidochka
- Department of Biological Sciences, Brock University, St. Catharines, ON L2S 3A1, Canada
| | - Denis Thiéry
- INRAE, Bordeaux Sciences Agro, ISVV, UMR SAVE, 33140 Villenave d’Ornon, France
- Correspondence: ; Tel.: +33-557-122-618
| | - Daciana Papura
- INRAE, Bordeaux Sciences Agro, ISVV, UMR SAVE, 33140 Villenave d’Ornon, France
| |
Collapse
|
15
|
Novikov EA, Zadubrovskiy PA, Kondratyuk EY, Kryukov VY, Novikova EV, Glupov VV. Effects of the Entomopathogenic Fungi, Beauveria bassiana and Metarhizium robertsii, on the Physiological and Behavioral Traits of the Northern Red-Backed Vole (Myodes rutilus, Rodentia, Cricetidae) under Stressful Conditions. BIOL BULL+ 2022. [DOI: 10.1134/s1062359022070123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
16
|
Mantzoukas S, Daskalaki E, Kitsiou F, Papantzikos V, Servis D, Bitivanos S, Patakioutas G, Eliopoulos PA. Dual Action of Beauveria bassiana (Hypocreales; Cordycipitaceae) Endophytic Stains as Biocontrol Agents against Sucking Pests and Plant Growth Biostimulants on Melon and Strawberry Field Plants. Microorganisms 2022; 10:2306. [PMID: 36422376 PMCID: PMC9692842 DOI: 10.3390/microorganisms10112306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 11/17/2022] [Accepted: 11/19/2022] [Indexed: 08/27/2023] Open
Abstract
Entomopathogenic fungi (EPF) can colonize plant tissues and serve crops not only as biopesticides but also as biostimulants that promote plant growth and trigger defense mechanisms. In this context, field trials were conducted evaluating two commercial strains of the entomopathogen Beauveria bassiana (Hypocreales: Cordycipitaceae), GHA (Botanigard) and PPRI 5339 (Velifer® ES) and a wild strain (AP0101) isolated from Achaia, Greece. The three strains were investigated in the field for their endophytic effects on melon Cucumis melo (Cucurbitales: Cucurbitaceae) and strawberry Fragaria sp. (Rosales: Rosaceae) plants and in particular for their ability to colonize plant tissues, control infestations of sucking insects Aphis gossypii (Hemiptera: Aphididae), Chaetosiphon fragaefolii (Hemiptera: Aphididae) and Frankliniella occidentalis (Thysanoptera: Thripidae), and improve plant growth parameters (plant height, number of flowers and fruits). All experimental fungal strains successfully colonized both plants. A significant decrease in the aphid and thrip populations was observed in the treated plants compared to the untreated control. As for plant growth, the number of flowers and fruits was significantly increased in plants treated with B. bassiana strains AP0101 and PPRI 5339. Our results clearly indicate that fungal endophytes can efficiently act as dual action agents demonstrating both insecticidal and growth-promoting effects.
Collapse
Affiliation(s)
- Spiridon Mantzoukas
- Department of Agriculture, Arta Campus, University of Ioannina, 45100 Ioannina, Greece
| | - Eufrosini Daskalaki
- Department of Agriculture, Arta Campus, University of Ioannina, 45100 Ioannina, Greece
| | - Foteini Kitsiou
- Laboratory of Plant Physiology, Department of Biology, University of Patras, 26504 Patras, Greece
| | - Vasileios Papantzikos
- Department of Agriculture, Arta Campus, University of Ioannina, 45100 Ioannina, Greece
| | | | | | - George Patakioutas
- Department of Agriculture, Arta Campus, University of Ioannina, 45100 Ioannina, Greece
| | - Panagiotis A. Eliopoulos
- Laboratory of Plant Health Management, Department of Agrotechnology, University of Thessaly, Geopolis, 41500 Larissa, Greece
| |
Collapse
|
17
|
Poveda J, Baptista P, Sacristán S, Velasco P. Editorial: Beneficial effects of fungal endophytes in major agricultural crops. FRONTIERS IN PLANT SCIENCE 2022; 13:1061112. [PMID: 36452085 PMCID: PMC9702551 DOI: 10.3389/fpls.2022.1061112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 10/25/2022] [Indexed: 06/10/2023]
Affiliation(s)
- Jorge Poveda
- Institute for Multidisciplinary Research in Applied Biology (IMAB), Universidad Pública de Navarra, Arrosadía, Pamplona, Spain
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, de Santa Apolónia, Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, de Santa Apolónia, Bragança, Portugal
| | - Paula Baptista
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, de Santa Apolónia, Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, de Santa Apolónia, Bragança, Portugal
| | - Soledad Sacristán
- Centro de Biotecnología y Genómica de Plantas (CBGP), Universidad Politécnica de Madrid (UPM), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria/Spanish National Research Council (INIA/CSIC), and Departamento de Biotecnología-Biología Vegetal, Escuela Técnica Superior de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - Pablo Velasco
- Group of Genetics, Breeding and Biochemistry of Brassicas, Misión Biológica de Galicia (MBG), Spanish National Research Council (CSIC), Pontevedra, Spain
| |
Collapse
|
18
|
Wilberts L, Vuts J, Caulfield JC, Thomas G, Birkett MA, Herrera-Malaver B, Verstrepen KJ, Sobhy IS, Jacquemyn H, Lievens B. Impact of endophytic colonization by entomopathogenic fungi on the behavior and life history of the tobacco peach aphid Myzus persicae var. nicotianae. PLoS One 2022; 17:e0273791. [PMID: 36067150 PMCID: PMC9447930 DOI: 10.1371/journal.pone.0273791] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/16/2022] [Indexed: 11/19/2022] Open
Abstract
Entomopathogenic fungi can adopt an endophytic lifestyle and provide protection against insect herbivores and plant pathogens. So far, most studies have focused on Beauveria bassiana to increase plant resistance against abiotic and biotic stresses, while only little is known for other entomopathogenic fungi. In this study, we investigated whether root inoculation of sweet pepper (Capsicum annuum L.) by the entomopathogenic fungi Akanthomyces muscarius ARSEF 5128 and B. bassiana ARSEF 3097 can improve resistance against the tobacco peach aphid Myzus persicae var. nicotianae. First, dual-choice experiments were performed to test the hypothesis that the fungi deter aphids via modifying plant volatile profiles. Next, we tested the hypothesis that endophytic colonization negatively affects aphid life history traits, such as fecundity, development and mortality rate. Aphids were significantly attracted to the odor of plants inoculated with A. muscarius over non-inoculated plants. Plants inoculated with A. muscarius emitted significantly higher amounts of β-pinene than non-inoculated plants, and significantly higher amounts of indole than B. bassiana-inoculated and non-inoculated plants. Inoculation with the fungal strains also caused significantly higher emission of terpinolene. Further, both aphid longevity and fecundity were significantly reduced by 18% and 10%, respectively, when feeding on plants inoculated with A. muscarius, although intrinsic rate of population increase did not differ between inoculated and non-inoculated plants. Sweet pepper plants inoculated with B. bassiana ARSEF 3097 did not elicit a significant behavioral response nor affected the investigated life history traits. We conclude that endophytic colonization by entomopathogenic fungi has the potential to alter olfactory behavior and performance of M. persicae var. nicotianae, but effects are small and depend on the fungal strain used.
Collapse
Affiliation(s)
- Liesbet Wilberts
- Department of Microbial and Molecular Systems (M2S), CMPG Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), KU Leuven, Leuven, Belgium
- Leuven Plant Institute (LPI), KU Leuven, Leuven, Belgium
| | - József Vuts
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - John C. Caulfield
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Gareth Thomas
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Michael A. Birkett
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, United Kingdom
| | - Beatriz Herrera-Malaver
- Department M2S, CMPG Laboratory of Genetics and Genomics, KU Leuven, Leuven, Belgium
- Flanders Institute for Biotechnology (VIB), KU Leuven Center for Microbiology, Leuven, Belgium
| | - Kevin J. Verstrepen
- Department M2S, CMPG Laboratory of Genetics and Genomics, KU Leuven, Leuven, Belgium
- Flanders Institute for Biotechnology (VIB), KU Leuven Center for Microbiology, Leuven, Belgium
| | - Islam S. Sobhy
- Department of Microbial and Molecular Systems (M2S), CMPG Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), KU Leuven, Leuven, Belgium
- Faculty of Agriculture, Department of Plant Protection, Suez Canal University, Ismailia, Egypt
| | - Hans Jacquemyn
- Leuven Plant Institute (LPI), KU Leuven, Leuven, Belgium
- Laboratory of Plant Conservation and Population Biology, Biology Department, KU Leuven, Leuven, Belgium
| | - Bart Lievens
- Department of Microbial and Molecular Systems (M2S), CMPG Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), KU Leuven, Leuven, Belgium
- Leuven Plant Institute (LPI), KU Leuven, Leuven, Belgium
- * E-mail:
| |
Collapse
|
19
|
Assessing the Endophytic Potential of a Commercially Available Entomopathogenic Beauveria bassiana Strain in Various Citrus Rootstocks. Appl Microbiol 2022. [DOI: 10.3390/applmicrobiol2030044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The citrus industry is challenged by numerous arthropods, yet extensive research has not been conducted to determine the potential use of entomopathogenic fungi as endophytes in pest management strategies. Two inoculation methods (i.e., soil drench and foliar spray) using a suspension of Beauveria bassiana (strain PPRI 5339 contained in Velifer®) containing 4 × 107 conidia mL−1 in 0.01% Tween 80 were conducted on three commercially available citrus rootstocks (i.e., ‘US-942’, ‘US-812’, ‘Swingle’). Seedlings were grown under greenhouse-controlled conditions over a 7-week observation period. Similarly, a third inoculation method (seed soaking) was conducted using seeds from the same three rootstocks. The fungus was re-isolated post-inoculation from ‘US-942’ and ‘US-812’ in the foliar spray and seed soaking treatments. In addition, the fungus was recovered from root tissue in the foliar-sprayed seedlings, suggesting possible systemic movement from leaves to roots. The fungus was not recovered from soil-drench-treated seedlings, nor from any of the ‘Swingle’ cultivars. This study assessed the potential of B. bassiana to endophytically colonize certain citrus rootstocks in planta.
Collapse
|
20
|
Delivery and effectiveness of entomopathogenic fungi for mosquito and tick control: current knowledge and research challenges. Acta Trop 2022; 234:106627. [DOI: 10.1016/j.actatropica.2022.106627] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/12/2022] [Accepted: 07/28/2022] [Indexed: 02/07/2023]
|
21
|
Hagh-Doust N, Färkkilä SM, Hosseyni Moghaddam MS, Tedersoo L. Symbiotic fungi as biotechnological tools: Methodological challenges and relative benefits in agriculture and forestry. FUNGAL BIOL REV 2022. [DOI: 10.1016/j.fbr.2022.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
22
|
de Andrade Lourenço D, Branco I, Choupina A. A systematic review about biological control of phytopathogenic Phytophthora cinnamomi. Mol Biol Rep 2022; 49:9947-9962. [PMID: 35585380 DOI: 10.1007/s11033-022-07547-2] [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: 03/11/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 11/27/2022]
Abstract
The oomycetes of the genus Phytophthora have the most aggressive species for agriculture and forestry, such as Phytophthora sojae which is responsible for soybean root rot, Phytophthora infestans responsible for the potato downy mildew that caused the diaspora in Ireland in the nineteenth-century, and Phytophthora cinnamomi that affects a wide variety of tree species, from avocado in America, trees in Oceania to European chestnut trees. P. cinnamomi reproduces either sexually or asexually and asexual zoospores can live as saprotrophs and subsist in the soil long after death and removal of host plants. Controlling this organism is very challenging for researchers due to the limited range of effective chemical inhibitors. In this work, we present a systematic review of alternatives for biocontrol of Phytophthora in general and P. cinnamomi in particular. Our literature review indicates that Trichoderma spp., mainly Trichoderma harzianum, T. virens, and T. asperellum are very promising fungal species in the control of different Phytophthora spp. The Bacillus genus is also very promising in the control and inhibition of several Phytophthoras spp.
Collapse
Affiliation(s)
- Darling de Andrade Lourenço
- Department of Biochemistry, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Ramiro Barcelo's street, 2600, 90035-003, Porto Alegre, RS, Brazil
| | - Iuliia Branco
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - Altino Choupina
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal. .,Centro de Investigação de Montanha (CIMO) - Instituto Politécnico de Bragança, Campus Santa Apolónia, 5301-855, Bragança, Portugal.
| |
Collapse
|
23
|
González-Pérez E, Ortega-Amaro MA, Bautista E, Delgado-Sánchez P, Jiménez-Bremont JF. The entomopathogenic fungus Metarhizium anisopliae enhances Arabidopsis, tomato, and maize plant growth. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 176:34-43. [PMID: 35217328 DOI: 10.1016/j.plaphy.2022.02.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/27/2022] [Accepted: 02/09/2022] [Indexed: 05/28/2023]
Abstract
Species of the entomopathogenic fungi Metarhizium are used worldwide as biocontrol agents. Recently, other lifestyles have been associated with some Metarhizium species, which include their role as saprophytes, endophytes, and plant growth promoters. Herein, the effect of three Metarhizium anisopliae strains on the growth of Arabidopsis thaliana plantlets was evaluated using an in vitro split system. Arabidopsis fresh weight and total chlorophyll content significantly increased 7 days post-inoculation with the three Metarhizium anisopliae strains evaluated. The primary root length was promoted by all fungal strains without physical contact, whereas in direct contact primary root growth was inhibited. Volatile organic compounds identification revealed that during the interaction of Arabidopsis with Ma-20 and Ma-25 strains only β-caryophyllene was produced, whereas in the Arabidopsis-Ma-28 interaction o-cymene was mainly emitted. The plant growth promoting effect induced by Metarhizium anisopliae strains was also achieved in Arabidopsis, tomato and maize plants grown in soil pots. Our results showed that three Metarhizium anisopliae strains were able to increase plant fresh weight, opening promising perspectives for field production, with the advantages of insect biocontrol and plant growth promotion induced by this species of fungus.
Collapse
Affiliation(s)
- Enrique González-Pérez
- Laboratorio de Biotecnología Molecular de Plantas, División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, SLP, Mexico
| | - María Azucena Ortega-Amaro
- Laboratorio de Biotecnología Molecular de Plantas, División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, SLP, Mexico; Coordinación Académica Región Altiplano Oeste, Universidad Autónoma de San Luis Potosí, Salinas de Hidalgo, SLP, México
| | - Elihú Bautista
- CONACYT-Consorcio de Investigación, Innovación y Desarrollo para las Zonas Áridas (CIIDZA), Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, SLP, Mexico
| | - Pablo Delgado-Sánchez
- Laboratorio de Biotecnología, Facultad de Agronomía y Veterinaria, Universidad Autónoma de San Luis Potosí, Soledad de Graciano Sánchez, SLP, Mexico
| | - Juan Francisco Jiménez-Bremont
- Laboratorio de Biotecnología Molecular de Plantas, División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica A. C., San Luis Potosí, SLP, Mexico.
| |
Collapse
|
24
|
Potentials of Endophytic Fungi in the Biosynthesis of Versatile Secondary Metabolites and Enzymes. FORESTS 2021. [DOI: 10.3390/f12121784] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
World population growth and modernization have engendered multiple environmental problems: the propagation of humans and crop diseases and the development of multi-drug-resistant fungi, bacteria and viruses. Thus, a considerable shift towards eco-friendly products has been seen in medicine, pharmacy, agriculture and several other vital sectors. Nowadays, studies on endophytic fungi and their biotechnological potentials are in high demand due to their substantial, cost-effective and eco-friendly contributions in the discovery of an array of secondary metabolites. For this review, we provide a brief overview of plant–endophytic fungi interactions and we also state the history of the discovery of the untapped potentialities of fungal secondary metabolites. Then, we highlight the huge importance of the discovered metabolites and their versatile applications in several vital fields including medicine, pharmacy, agriculture, industry and bioremediation. We then focus on the challenges and on the possible methods and techniques that can be used to help in the discovery of novel secondary metabolites. The latter range from endophytic selection and culture media optimization to more in-depth strategies such as omics, ribosome engineering and epigenetic remodeling.
Collapse
|
25
|
Ahlawat OP, Yadav D, Kashyap PL, Khippal A, Singh G. Wheat endophytes and their potential role in managing abiotic stress under changing climate. J Appl Microbiol 2021; 132:2501-2520. [PMID: 34800309 DOI: 10.1111/jam.15375] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/23/2021] [Accepted: 11/16/2021] [Indexed: 11/30/2022]
Abstract
Wheat (Triticum aestivum L.) cultivation differs considerably in respect of soil type, temperature, pH, organic matter, moisture regime, etc. Among these, rising atmospheric temperature due to global warming is most important as it affects grain yield drastically. Studies have shown that for every 1°C rise in temperature above wheat's optimal growing temperature range of 20-25°C, there is a decrease in 2.8 days and 1.5 mg in the grain filling period and kernel weight, respectively, resulting in wheat yield reduction by 4-6 quintal per hectare. Growing demand for food and multidimensional issues of global warming may further push wheat crop to heat stress environments that can substantially affect heading duration, percent grain setting, maturity duration, grain growth rate and ultimately total grain yield. Considerable genetic variation exists in wheat gene pool with respect to various attributes associated with high temperature and stress tolerance; however, only about 15% of the genetic variability could be incorporated into cultivated wheat so far. Thus, alternative strategies have to be explored and implemented for sustainable, more productive and environment friendly agriculture. One of the feasible and environment friendly option is to look at micro-organisms that reside inside the plant without adversely affecting its growth, known as 'endophytes', and these colonize virtually all plant organs such as roots, stems, leaves, flowers and grains. The relationship between plant and endophytes is vital to the plant health, productivity and overall survival under abiotic stress conditions. Thus, it becomes imperative to enlist the endophytes (bacterial and fungal) isolated till date from wheat cultivars, their mechanism of ingression and establishment inside plant organs, genes involved in ingression, the survival advantages they confer to the plant under abiotic stress conditions and the potential benefits of their use in sustainable wheat cultivation.
Collapse
Affiliation(s)
| | - Dhinu Yadav
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | - Prem Lal Kashyap
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | - Anil Khippal
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| | - Gyanendra Singh
- ICAR-Indian Institute of Wheat and Barley Research, Karnal, India
| |
Collapse
|
26
|
Paradza VM, Khamis FM, Yusuf AA, Subramanian S, Ekesi S, Akutse KS. Endophytic Colonisation of Solanum lycopersicum and Phaseolus vulgaris by Fungal Endophytes Promotes Seedlings Growth and Hampers the Reproductive Traits, Development, and Survival of the Greenhouse Whitefly, Trialeurodes vaporariorum. FRONTIERS IN PLANT SCIENCE 2021; 12:771534. [PMID: 34868170 PMCID: PMC8640138 DOI: 10.3389/fpls.2021.771534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/18/2021] [Indexed: 06/01/2023]
Abstract
In the scope of mitigating the negative impacts of pesticide use and managing greenhouse whiteflies, Trialeurodes vaporariorum sustainably, 16 endophytic fungal isolates from five different genera (Beauveria, Trichoderma, Hypocrea, Bionectria, and Fusarium) were screened for their ability to colonise two preferred host plant species, namely, tomato (Solanum lycopersicum L.) and French bean (Phaseolus vulgaris L.), through seed inoculation. Seven and nine isolates were endophytic to P. vulgaris and S. lycopersicum, respectively, where significant differences in the endophytic colonisation rates were observed among the fungal isolates in P. vulgaris and its plant parts, with a significant interaction between the isolates and plant parts in S. lycopersicum. Hypocrea lixii F3ST1, Trichoderma asperellum M2RT4, Trichoderma atroviride F5S21, and T. harzianum KF2R41 successfully colonised all the plant parts of both hosts and therefore were selected and further evaluated for their endophytic persistence, effect on plant growth, and pathogenicity to T. vaporariorum adults and F1 progeny. The four endophytes remained in both host plants for the 5-week assessment with varied colonisation rates related to the strong interaction with the time, isolates, and plant parts in both hosts. The effect of the same endophytes on the different host growth parameters varied in P. vulgaris and S. lycopersicum, with T. asperellum M2RT4 not boosting the growth in both host plants while T. atroviride F5S21 resulted in enhanced shoot biomass in S. lycopersicum. T. atroviride F5S21 and T. harzianum KF2R41 inoculated S. lycopersicum plants and H. lixii F3ST1, T. asperellum M2RT4, and T. harzianum KF2R41 inoculated P. vulgaris plants had significantly lower oviposition, while nymph development in both hosts was significantly prolonged in all the endophytically-colonised plants. The endophytes H. lixii F3ST1 and T. asperellum M2RT4 significantly reduced the longevity/survival of the exposed T. vaporariorum adults and the progeny in both S. lycopersicum and P. vulgaris. The findings demonstrate the attributes of the various endophytes in host plant growth promotion as well as their effects on the life-history parameters of T. vaporariorum and could consequently be developed as potential endophytic fungal-based biopesticides for the sustainable management of the pest in S. lycopersicum and P. vulgaris cropping systems.
Collapse
Affiliation(s)
- Vongai M. Paradza
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
- Department of Zoology and Entomology, University of Pretoria, Hatfield, South Africa
| | - Fathiya M. Khamis
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Abdullahi A. Yusuf
- Department of Zoology and Entomology, University of Pretoria, Hatfield, South Africa
- Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Hatfield, South Africa
| | - Sevgan Subramanian
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Sunday Ekesi
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Komivi S. Akutse
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| |
Collapse
|
27
|
Testing Virulence of Different Species of Insect Associated Fungi against Yellow Mealworm (Coleoptera: Tenebrionidae) and Their Potential Growth Stimulation to Maize. PLANTS 2021; 10:plants10112498. [PMID: 34834860 PMCID: PMC8623216 DOI: 10.3390/plants10112498] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/10/2021] [Accepted: 11/15/2021] [Indexed: 11/17/2022]
Abstract
This paper investigates 71 isolates of two genera of entomopathogens, Metarhizium and Beauveria, and a biostimulative genus Trichoderma, for their ability to infect yellow mealworms (Tenebrio molitor) and to stimulate maize (Zea mays) growth. Fungal origin, host, and isolation methods were taken into account in virulence analysis as well. Isolates Metarhizium brunneum (1154) and Beauveria bassiana (2121) showed the highest mortality (100%) against T. molitor. High virulence seems to be associated with fungi isolated from wild adult mycosed insects, meadow habitats, and Lepidopteran hosts, but due to uneven sample distribution, we cannot draw firm conclusions. Trichoderma atroviride (2882) and Trichoderma gamsii (2883) increased shoot length, three Metarhizium robertsii isolates (2691, 2693, and 2688) increased root length and two M. robertsii isolates (2146 and 2794) increased plant dry weight. Considering both criteria, the isolate M. robertsii (2693) was the best as it caused the death of 73% T. molitor larvae and also significantly increased maize root length by 24.4%. The results warrant further studies with this isolate in a tri-trophic system.
Collapse
|
28
|
The Threat of Pests and Pathogens and the Potential for Biological Control in Forest Ecosystems. FORESTS 2021. [DOI: 10.3390/f12111579] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Forests are an essential component of the natural environment, as they support biodiversity, sequester carbon, and play a crucial role in biogeochemical cycles—in addition to producing organic matter that is necessary for the function of terrestrial organisms. Forests today are subject to threats ranging from natural occurrences, such as lightning-ignited fires, storms, and some forms of pollution, to those caused by human beings, such as land-use conversion (deforestation or intensive agriculture). In recent years, threats from pests and pathogens, particularly non-native species, have intensified in forests. The damage, decline, and mortality caused by insects, fungi, pathogens, and combinations of pests can lead to sizable ecological, economic, and social losses. To combat forest pests and pathogens, biocontrol may be an effective alternative to chemical pesticides and fertilizers. This review of forest pests and potential adversaries in the natural world highlights microbial inoculants, as well as research efforts to further develop biological control agents against forest pests and pathogens. Recent studies have shown promising results for the application of microbial inoculants as preventive measures. Other studies suggest that these species have potential as fertilizers.
Collapse
|
29
|
Bai J, Li L, Xu Z, Zhang Y, Liang L, Ma X, Ma W, Ma L. Mutation of glucan synthase catalytic subunit in Beauveria bassiana affects fungal growth and virulence. Fungal Genet Biol 2021; 158:103637. [PMID: 34798271 DOI: 10.1016/j.fgb.2021.103637] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/08/2021] [Accepted: 11/11/2021] [Indexed: 11/19/2022]
Abstract
Beauveria bassiana is a well-known entomopathogenic fungus that parasitizes on a variety of insect species. Glucan in the cell wall of B. bassiana plays a crucial role in its structure and growth and is also involved in the activation of the host insect's immune system. Glucan biosynthesis is primarily regulated by glucan synthase, however, it is unclear if the glucan synthase catalytic subunit gene (GluS) affects the growth and virulence of B. bassiana. In this study, we constructed the mutant of the B. bassiana glucan synthase catalytic subunit (ΔGluS) by homologous recombination and observed that glucan synthase knockout affects both spore germination and cell area. Further enzyme-based assays along with gene expression analysis of glucan synthase revealed a significant downregulation in the mutant strains compared to the wild type of B. bassiana. Moreover, the virulence of ΔGluS strains against gypsy moth (Lymantria dispar) showed no significant difference compared to the wild-type strains when injected, while the spraying gypsy moths with the conidia of ΔGluS was significantly more lethal than spraying the conidia of the wild type. Altogether, our study constructed a new, highly efficient B. bassiana mutant that can be used for pest control and provides a readily transferable method for other insect-entomopathogenic interaction studies.
Collapse
Affiliation(s)
- Jianyang Bai
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Lu Li
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Zhe Xu
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Yue Zhang
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Liwei Liang
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China
| | - Xiaoqian Ma
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China; Institute of Forest Protection, Heilongjiang Academy of Forestry, Harbin 150081, China
| | - Wei Ma
- College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China.
| | - Ling Ma
- Department of Forest Protection, College of Forestry, Northeast Forestry University, Harbin 150040, China; Forest Protection Technology Innovation Center, Harbin, China.
| |
Collapse
|
30
|
Rhizosphere Microbiomes of Potato Cultivated under Bacillus subtilis Treatment Influence the Quality of Potato Tubers. Int J Mol Sci 2021; 22:ijms222112065. [PMID: 34769506 PMCID: PMC8584837 DOI: 10.3390/ijms222112065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/27/2021] [Accepted: 11/02/2021] [Indexed: 12/26/2022] Open
Abstract
Plants serve as a niche for the growth and proliferation of a diversity of microorganisms. Soil microorganisms, which closely interact with plants, are increasingly being recognized as factors important to plant health. In this study, we explored the use of high-throughput DNA sequencing of the fungal ITS and bacterial 16S for characterization of the fungal and bacterial microbiomes following biocontrol treatment (DT) with Bacillus subtilis strain Bv17 relative to treatments without biocontrol (DC) during the potato growth cycle at three time points. A total of 5631 operational taxonomic units (OTUs) were identified from the 16S data, and 2236 OTUs were identified from the ITS data. The number of bacterial and fungal OTU in DT was higher than in DC and gradually increased during potato growth. In addition, indices such as Ace, Chao, Shannon, and Simpson were higher in DT than in DC, indicating greater richness and community diversity in soil following the biocontrol treatment. Additionally, the potato tuber yields improved without a measurable change in the bacterial communities following the B. subtilis strain Bv17 treatment. These results suggest that soil microbial communities in the rhizosphere are differentially affected by the biocontrol treatment while improving potato yield, providing a strong basis for biocontrol utilization in crop production.
Collapse
|
31
|
Adeleke BS, Babalola OO. The plant endosphere-hidden treasures: a review of fungal endophytes. Biotechnol Genet Eng Rev 2021; 37:154-177. [PMID: 34666635 DOI: 10.1080/02648725.2021.1991714] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The endosphere represents intracellular regions within plant tissues colonize by microbial endophytes without causing disease symptoms to host plants. Plants harbor one or two endophytic microbes capable of synthesizing metabolite compounds. Environmental factors determine the plant growth and survival as well as the kind of microorganisms associated with them. Some fungal endophytes that symbiotically colonize the endosphere of medicinal plants with the potential of producing biological products have been employed in traditional and modern medicine. The bioactive resources from endophytic fungi are promising; biotechnologically to produce cheap and affordable commercial bioactive products as alternatives to chemical drugs and other compounds. The exploration of bioactive metabolites from fungal endophytes has been found applicable in agriculture, pharmaceutical, and industries. Thus, fungal endophytes can be engineered to produce a substantive quantity of pharmacological drugs through the biotransformation process. Hence, this review shall provide an overview of fungal endophytes, ecology, their bioactive compounds, and exploration with the biosystematics approach.
Collapse
Affiliation(s)
- Bartholomew Saanu Adeleke
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, South Africa
| |
Collapse
|
32
|
Sofian FF, Suzuki T, Supratman U, Harneti D, Maharani R, Salam S, Abdullah FF, Koseki T, Tanaka K, Kimura KI, Shiono Y. Cochlioquinone derivatives produced by coculture of endophytes, Clonostachys rosea and Nectria pseudotrichia. Fitoterapia 2021; 155:105056. [PMID: 34626738 DOI: 10.1016/j.fitote.2021.105056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/30/2021] [Accepted: 10/03/2021] [Indexed: 11/18/2022]
Abstract
Three new meroterpenoid derivatives, furanocochlioquinol (1) and furanocochlioquinone (2), as well as nectrianolin D (3), together with two known biogenetically related compounds 4 and 5 were isolated from a mixed culture of two mangrove-derived fungi, Clonostachys rosea B5-2 and Nectria pseudotrichia B69-1. The structures of 1-3 were deduced based on the interpretation of HRMS and NMR data. Compounds 1-5 exhibited cytotoxicity against human promyelocytic leukemia (HL60) cells with IC50 values ranging from 0.47 to 10.16 μM.
Collapse
Affiliation(s)
- Ferry Ferdiansyah Sofian
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Takuma Suzuki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Unang Supratman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Desi Harneti
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Rani Maharani
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor 45363, Indonesia
| | - Supriatno Salam
- Faculty of Pharmacy, Universitas Mulawarman, Samarinda 75123, Kalimantan Timur, Indonesia
| | - Fajar Fauzi Abdullah
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut 44151, Indonesia
| | - Takuya Koseki
- Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | - Kurumi Tanaka
- Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Graduate School of Arts and Sciences, Iwate University, Morioka, Iwate 020-8550, Japan
| | - Yoshihito Shiono
- The United Graduate School of Agricultural Sciences, Iwate University, Morioka, Iwate 020-8550, Japan; Department of Food, Life, and Environmental Science, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan.
| |
Collapse
|
33
|
Bamisile BS, Siddiqui JA, Akutse KS, Ramos Aguila LC, Xu Y. General Limitations to Endophytic Entomopathogenic Fungi Use as Plant Growth Promoters, Pests and Pathogens Biocontrol Agents. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10102119. [PMID: 34685928 PMCID: PMC8540635 DOI: 10.3390/plants10102119] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 09/23/2021] [Indexed: 05/31/2023]
Abstract
The multiple roles of fungal entomopathogens in host plants' growth promotion, pest and pathogen management have drawn huge attention for investigation. Endophytic species are known to influence various activities of their associated host plants, and the endophyte-colonized plants have been demonstrated to gain huge benefits from these symbiotic associations. The potential application of fungal endophytes as alternative to inorganic fertilizers for crop improvement has often been proposed. Similarly, various strains of insect pathogenic fungi have been formulated for use as mycopesticides and have been suggested as long-term replacement for the synthetic pesticides that are commonly in use. The numerous concerns about the negative effects of synthetic chemical pesticides have also driven attention towards developing eco-friendly pest management techniques. However, several factors have been underlined to be militating the successful adoption of entomopathogenic fungi and fungal endophytes as plant promoting, pests and diseases control bio-agents. The difficulties in isolation and characterization of novel strains, negative effects of geographical location, vegetation type and human disturbance on fungal entomopathogens, are among the numerous setbacks that have been documented. Although, the latest advances in biotechnology and microbial studies have provided means of overcoming many of these problems. For instance, studies have suggested measures for mitigating the negative effects of biotic and abiotic stressors on entomopathogenic fungi in inundative application on the field, or when applied in the form of fungal endophytes. In spite of these efforts, more studies are needed to be done to achieve the goal of improving the overall effectiveness and increase in the level of acceptance of entomopathogenic fungi and their products as an integral part of the integrated pest management programs, as well as potential adoption as an alternative to inorganic fertilizers and pesticides.
Collapse
Affiliation(s)
| | - Junaid Ali Siddiqui
- Department of Entomology, South China Agricultural University, Guangzhou 510642, China;
| | - Komivi Senyo Akutse
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi 00100, Kenya;
| | - Luis Carlos Ramos Aguila
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
| | - Yijuan Xu
- Department of Entomology, South China Agricultural University, Guangzhou 510642, China;
| |
Collapse
|
34
|
Bamisile BS, Akutse KS, Siddiqui JA, Xu Y. Model Application of Entomopathogenic Fungi as Alternatives to Chemical Pesticides: Prospects, Challenges, and Insights for Next-Generation Sustainable Agriculture. FRONTIERS IN PLANT SCIENCE 2021; 12:741804. [PMID: 34659310 PMCID: PMC8514871 DOI: 10.3389/fpls.2021.741804] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/06/2021] [Indexed: 05/15/2023]
Abstract
In the past few decades, the control of pests and diseases of cultivated plants using natural and biological measures has drawn increasing attention in the quest to reduce the level of dependence on chemical products for agricultural production. The use of living organisms, predators, parasitoids, and microorganisms, such as viruses, bacteria, and fungi, has proven to be a viable and sustainable pest management technique. Among the aforementioned, fungi, most importantly the insect-pathogenic species, have been in use for more than 150years. These include the most popular strains belonging to the genera Beauveria, Metarhizium, Isaria, Hirsutella, and Lecanicillium. Their application is usually through an inundative approach, which inherently involves exposure of the fungal spores to unfavorable humidity, temperature, and solar radiation conditions. These abiotic factors reduce the persistence and efficacy of these insect-pathogenic fungi. Despite these limitations, over 170 strains have been formulated as mycopesticides and are available for commercial use. In the last few decades, numerous studies have suggested that these species of entomopathogenic fungi (EPF) offer far more benefits and have broader ecological functions than hitherto presumed. For instance, aside from their roles as insect killers, it has been well established that they also colonize various host plants and, hence, provide other benefits including plant pathogen antagonism and plant growth promotion and serve as sources of novel bioactive compounds and secondary metabolites, etc. In this light, the potential of EPF as alternatives or perhaps as supplements to chemical pesticides in plant protection is discussed in this review. The paper highlights the numerous benefits associated with endophytic fungal entomopathogen and host plant associations, the mechanisms involved in mediating plant defense against pests and pathogens, and the general limitations to the use of EPF in plant protection. A deeper understanding of these plant host-fungus-insect relationships could help unveil the hidden potentials of fungal endophytes, which would consequently increase the level of acceptance and adoption by users as an integral part of pest management programs and as a suitable alternative to chemical inputs toward sustainable crop production.
Collapse
Affiliation(s)
| | - Komivi Senyo Akutse
- Plant Health Theme, International Centre of Insect Physiology and Ecology, Nairobi, Kenya
| | - Junaid Ali Siddiqui
- Department of Entomology, South China Agricultural University, Guangzhou, China
| | - Yijuan Xu
- Department of Entomology, South China Agricultural University, Guangzhou, China
| |
Collapse
|
35
|
Adeleke BS, Ayangbenro AS, Babalola OO. Genomic Analysis of Endophytic Bacillus cereus T4S and Its Plant Growth-Promoting Traits. PLANTS 2021; 10:plants10091776. [PMID: 34579311 PMCID: PMC8467928 DOI: 10.3390/plants10091776] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/24/2021] [Accepted: 07/25/2021] [Indexed: 11/19/2022]
Abstract
Insights into plant endophytic microbes and their exploration in agriculture have provided opportunities for sustainable plant health and food safety. Notable endophytic Bacillus species with plant growth-promoting traits have been documented; nevertheless, information on genome analysis of B. cereus associated with the sunflower in South Africa has not been studied. Therefore, we present whole-genome sequence of agriculturally important B. cereus strain T4S isolated from sunflower plants. The NextSeq Illumina sequencing yielded 7,255,762 bp sequence reads, 151 bp average read length, 5,945,881 bp genome size, 56 tRNA, 63 rRNA, and G + C content of 34.8%. The phylogeny analysis of strain T4S was similar to B. cereus NJ-W. Secondary metabolites, such as petrobactin, bacillibactin, bacitracin, molybdenum factor, zwittermicin, and fengycin underlining bacterial biocontrol efficacy against phytopathogens were found in the T4S genome. The predicted novel genes in the bacterial genome mediating the complex metabolic pathways can provide a genetic basis in understanding endosphere biology and their multiple functions thereof in crop improvement. Interestingly, seed and root inoculation with strain T4S contributed to sunflower yield under greenhouse experiments. Hence, the detection of notable genes specific for plant growth promotion as validated under in vitro screening, promisingly, suggests the relevance of strain T4S in agricultural biotechnology.
Collapse
|
36
|
Bell-Dereske LP, Evans SE. Contributions of environmental and maternal transmission to the assembly of leaf fungal endophyte communities. Proc Biol Sci 2021; 288:20210621. [PMID: 34375558 DOI: 10.1098/rspb.2021.0621] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Leaf fungal endophytes (LFEs) contribute to plant growth and responses to stress. Fungi colonize leaves through maternal transmission, e.g. via the seed, and through environmental transmission, e.g. via aerial dispersal. The relative importance of these two pathways in assembly and function of the LFE community is poorly understood. We used amplicon sequencing to track switchgrass (Panicum virgatum) LFEs in a greenhouse and field experiment as communities assembled from seed endophytes and rain fungi (integration of wet and dry aerial dispersal) in germinating seeds, seedlings, and adult plants. Rain fungi varied temporally and hosted a greater portion of switchgrass LFE richness (greater than 65%) than were found in seed endophytes (greater than 25%). Exposure of germinating seeds to rain inoculum increased dissimilarity between LFE communities and seed endophytes, increasing the abundance of rain-derived taxa, but did not change diversity. In the field, seedling LFE composition changed more over time, with a decline in seed-derived taxa and an increase in richness, in response to environmental transmission than LFEs of adult plants. We show that environmental transmission is an important driver of LFE assembly, and likely plant growth, but its influence depends on both the conditions at the time of colonization and plant life stage.
Collapse
Affiliation(s)
- Lukas P Bell-Dereske
- Laboratory of Environmental Microbiology, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Sarah E Evans
- W.K. Kellogg Biological Station, Michigan State University, Hickory Corners, MI 49060, USA.,Department of Integrative Biology, Michigan State University, East Lansing, MI 48824, USA.,Ecology and Evolutionary Biology Program, Michigan State University, East Lansing, MI 48824, USA
| |
Collapse
|
37
|
Insect-fungal-interactions: A detailed review on entomopathogenic fungi pathogenicity to combat insect pests. Microb Pathog 2021; 159:105122. [PMID: 34352375 DOI: 10.1016/j.micpath.2021.105122] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 07/30/2021] [Accepted: 07/30/2021] [Indexed: 12/16/2022]
Abstract
Global food security is threatened by insect pests of economically important crops. Chemical pesticides have been used frequently for the last few decades to manage insect pests throughout the world. However, these chemicals are hazardous for human health as well as the ecosystem. In addition, several pests have evolved resistance to many chemicals. Finding environment friendly alternatives lead the researchers to introduce biocontrol agents such as entomopathogenic fungi (EPF). These fungi include various genera that can infect and kill insects efficiently. Moreover, EPFs have considerable host specificity with a mild effect on non-target organisms and can be produced in bulk quantity quickly. However, insights into the biology of EPF and mechanism of action are of prime significance for their efficient utilization as a biocontrol agent. This review focuses on EPF-mediated insect management by explaining particular EPF strains and their general mode of action. We have comprehensively discussed which criteria should be used for the selection of pertinent EPF, and which aspects can impact the EPF efficiency. Finally, we have outlined various advantages of EPF and their limitations. The article summarizes the prospects related to EPF utilization as biocontrol agents. We hope that future strategies for the management of insects will be safer for our planet.
Collapse
|
38
|
Tyurin M, Kabilov MR, Smirnova N, Tomilova OG, Yaroslavtseva O, Alikina T, Glupov VV, Kryukov VY. Can Potato Plants Be Colonized with the Fungi Metarhizium and Beauveria under Their Natural Load in Agrosystems? Microorganisms 2021; 9:1373. [PMID: 34202827 PMCID: PMC8306205 DOI: 10.3390/microorganisms9071373] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 12/26/2022] Open
Abstract
Beauveria and Metarhizium fungi are facultative plant endophytes that provide plant growth-stimulating, immunomodulatory, and other beneficial effects. However, little is known about the level of plant colonization by these fungi under natural conditions. We assessed the endophytic colonization of potatoes (Solanum tuberosum) with entomopathogenic fungi at their natural load in soils (102-104 colony-forming units per g). Microbiological analyses of soils and plant organs, as well as a metagenomic analysis of potato roots and leaves, were conducted in three locations in Western Siberia, consisting of conventional agrosystems and kitchen gardens. The fungi were isolated at a relatively high frequency from unsterilized roots (up to 53% of Metarhizium-positive plants). However, the fungi were sparsely isolated from the internal tissues of roots, stems, and leaves (3%). Among the genus Metarhizium, two species, M. robertsii and M. brunneum, were detected in plants as well as in soils, and the first species was predominant. A metagenomic analysis of internal potato tissues showed a low relative abundance of Beauveria and Metarhizium (<0.3%), and the communities were represented primarily by phytopathogens. We suggest that colonization of the internal tissues of potatoes occurs sporadically under a natural load of entomopathogenic fungi in soils. The lack of stable colonization of potato plants with Beauveria and Metarhizium may be due to competition with phytopathogens.
Collapse
Affiliation(s)
- Maksim Tyurin
- Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, 630091 Novosibirsk, Russia; (O.G.T.); (O.Y.); (V.V.G.)
| | - Marsel R. Kabilov
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (M.R.K.); (T.A.)
| | - Natalia Smirnova
- Institute of Soil Science and Agrochemistry, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia;
| | - Oksana G. Tomilova
- Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, 630091 Novosibirsk, Russia; (O.G.T.); (O.Y.); (V.V.G.)
| | - Olga Yaroslavtseva
- Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, 630091 Novosibirsk, Russia; (O.G.T.); (O.Y.); (V.V.G.)
| | - Tatyana Alikina
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (M.R.K.); (T.A.)
| | - Viktor V. Glupov
- Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, 630091 Novosibirsk, Russia; (O.G.T.); (O.Y.); (V.V.G.)
| | - Vadim Yu Kryukov
- Institute of Systematics and Ecology of Animals, Siberian Branch of the Russian Academy of Sciences, 630091 Novosibirsk, Russia; (O.G.T.); (O.Y.); (V.V.G.)
| |
Collapse
|
39
|
Ntsobi N, Fanadzo M, Le Roes-Hill M, Nchu F. Effects of Clonostachys rosea f. catenula Inoculum on the Composting of Cabbage Wastes and the Endophytic Activities of the Composted Material on Tomatoes and Red Spider Mite Infestation. Microorganisms 2021; 9:microorganisms9061184. [PMID: 34072654 PMCID: PMC8228010 DOI: 10.3390/microorganisms9061184] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Revised: 04/30/2021] [Accepted: 04/30/2021] [Indexed: 11/16/2022] Open
Abstract
Globally, fungal inocula are being explored as agents for the optimization of composting processes. This research primarily evaluates the effects of inoculating organic vegetable heaps with the entomopathogenic fungus Clonostachys rosea f. catenula (Hypocreales) on the biophysicochemical properties of the end-product of composting. Six heaps of fresh cabbage (Brassica oleracea var. capitata) waste were inoculated with C. rosea f. catenula conidia and another six were not exposed to the fungus. The composted materials from the fungus- and control-treated heaps were subsequently used as a medium to cultivate tomatoes (Solanum lycopersicum). The biophysicochemical characteristics of the composted materials were also assessed after composting. In addition, the protective effect of the fungal inoculum against red spider mite (Tetranychus urticae) infestations in the tomatoes was evaluated through the determination of conidial colonization of the plant tissue and the number of plants infested by the insect. Furthermore, phytotoxicity tests were carried out post experiment. There were few significant variations (p < 0.05) in heap temperature or moisture level between treatments based on the weekly data. We found no significant differences in the levels of compost macronutrient and micronutrient constituents. Remarkably, the composted materials, when incorporated into a growth medium from fungus-treated heaps, induced a 100% endophytic tissue colonization in cultivated tomato plants. While fewer red spider mite infestations were observed in tomato plants grown in composted materials from fungus-treated heaps, the difference was not significant (χ2 = 0.96 and p = 0.32). The fungal treatment yielded composted materials that significantly (p < 0.05) enhanced tomato seed germination, and based on the phytotoxicity test, the composted samples from the heaps exposed to the C. rosea f. catenula inoculum were not toxic to tomato seeds and seedlings. In conclusion, this study showed that C. rosea f. catenula improved the quality of composted materials in terms of fungal endophytism and seed germination.
Collapse
Affiliation(s)
- Nomfusi Ntsobi
- Department of Agriculture, Wellington Campus, Cape Peninsula University of Technology, Jan Van Riebeeck Street, Private Bag X8, Wellington 7654, South Africa; (N.N.); (M.F.)
- Department of Horticultural Sciences, Bellville Campus, Cape Peninsula University of Technology, Symphony Way, P.O. Box 1906, Bellville 7535, South Africa
| | - Morris Fanadzo
- Department of Agriculture, Wellington Campus, Cape Peninsula University of Technology, Jan Van Riebeeck Street, Private Bag X8, Wellington 7654, South Africa; (N.N.); (M.F.)
| | - Marilize Le Roes-Hill
- Applied Microbial and Health Biotechnology Institute, Bellville Campus, Cape Peninsula University of Technology, Symphony Way, P.O. Box 1906, Bellville 7535, South Africa;
| | - Felix Nchu
- Department of Horticultural Sciences, Bellville Campus, Cape Peninsula University of Technology, Symphony Way, P.O. Box 1906, Bellville 7535, South Africa
- Correspondence:
| |
Collapse
|
40
|
Noman A, Aqeel M, Islam W, Khalid N, Akhtar N, Qasim M, Yasin G, Hashem M, Alamri S, Al-Zoubi OM, Jalees MM, Al-Sadi A. Insects-plants-pathogens: Toxicity, dependence and defense dynamics. Toxicon 2021; 197:87-98. [PMID: 33848517 DOI: 10.1016/j.toxicon.2021.04.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 04/01/2021] [Accepted: 04/07/2021] [Indexed: 10/21/2022]
Abstract
In a natural ecosystem, the pathogen-plant-insect relationship has diverse implications for each other. The pathogens as well as insect-pests consume plant tissues as their feed that mostly results in damage. In turn, plant species have evolved specialized defense system to not only protect themselves but reduce the damage also. Such tripartite interactions involve toxicity, metabolic modulations, resistance etc. among all participants of interaction. These attributes result in selection pressure among participants. Coevolution of such traits reveals need to focus and unravel multiple hidden aspects of insect-plant-pathogen interactions. The definite modulations during plant responses to biotic stress and the operating defense network against herbivores are vital to research areas. Different types of plant pathogens and herbivores are tackled with various changes in plants, e.g. changes in genes expression, glucosinolate metabolism detoxification, signal transduction, cell wall modifications, Ca2+dependent signaling. It is essential to clarify which chemical in plants can work as a defense signal or weapon in plant-pathogen-herbivore interactions. In spite of increased knowledge regarding signal transduction pathways regulating growth-defense balance, much more is needed to unveil the coordination of growth rate with metabolic modulations in bi-trophic interactions. Here, we addressed plant-pathogen-insect interaction for toxicity as well as dependnce along with plant defense dynamics against pathogens and insects with broad range effects at the physio-biochemical and molecular level. We have reviewed interfaces in plant-pathogen-insect research to show pulsating regulation of plant immunity for attuning survival and ecological equilibrium. An improved understanding of the systematic foundation of growth-defense stability has vital repercussions for enhancing crop yield, including insights into uncoupling of host-parasite tradeoffs for ecological and environmental sustainability.
Collapse
Affiliation(s)
- Ali Noman
- Department of Botany, Government College University, Faisalabad, 38040, Pakistan.
| | - Muhammad Aqeel
- State Key Laboratory of Grassland Agro-ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, 730000, Gansu, PR China.
| | - Waqar Islam
- College of Geography, Fujian Normal University, Fuzhou, PR China
| | - Noreen Khalid
- Department of Botany, Government College Women University, Sialkot, Pakistan
| | - Noreen Akhtar
- Department of Botany, Government College for Women University, Faisalabad, Pakistan
| | - Muhammad Qasim
- Institute of Insect Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, PR China
| | - Ghulam Yasin
- Institute of Pure and Applied Biology, Bahau Din Zakria University Multan Pakistan, Pakistan
| | - Mohamed Hashem
- King Khalid University, College of Science, Department of Biology, Abha, 61413, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, 71516, Egypt.
| | - Saad Alamri
- King Khalid University, College of Science, Department of Biology, Abha, 61413, Saudi Arabia
| | | | - Muhammad Moazam Jalees
- Department of Microbiology, Cholistan University of Veterinary and Animal Sciences. Bahawalpur, Pakistan
| | - Abdullah Al-Sadi
- College of Agriculture and Marine Sciences, Sultan Qaboos University, Muscat. Sultanate of Oman, Oman
| |
Collapse
|
41
|
Zha LS, Kryukov VY, Ding JH, Jeewon R, Chomnunti P. Novel taxa and species diversity of Cordyceps sensu lato (Hypocreales, Ascomycota) developing on wireworms (Elateroidea and Tenebrionoidea, Coleoptera). MycoKeys 2021; 78:79-117. [PMID: 33854402 PMCID: PMC8021543 DOI: 10.3897/mycokeys.78.61836] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/12/2021] [Indexed: 12/04/2022] Open
Abstract
Species of Cordyceps sensu lato (Hypocreales, Sordariomycetes) have always attracted much scientific attention for their abundant species diversity, important medicinal values and biological control applications. The insect superfamilies Elateroidea and Tenebrionoidea are two large groups of Coleoptera and their larvae are generally called wireworms. Most wireworms inhabit humid soil or fallen wood and are often infected with Cordyceps s.l. However, the species diversity of Cordyceps s.l. on Elateroidea and Tenebrionoidea is poorly known. In the present work, we summarise taxonomic information of 63 Cordyceps s.l. species that have been reported as pathogens of wireworms. We review their hosts and geographic distributions and provide taxonomic notes for species. Of those, 60 fungal species are accepted as natural pathogens of wireworms and three species (Cordycepsmilitaris, Ophiocordycepsferruginosa and O.variabilis) are excluded. Two new species, O.borealis from Russia (Primorsky Krai) and O.spicatus from China (Guizhou), are described and compared with their closest allies. Polycephalomycesformosus is also described because it is reported as a pathogen of wireworms for the first time. Phylogeny was reconstructed from a combined dataset, comprising SSU, LSU and TEF1-α gene sequences. The results, presented in this study, support the establishment of the new species and confirm the identification of P.formosus.
Collapse
Affiliation(s)
- Ling-Sheng Zha
- School of Life Sciences, Huaibei Normal University, Huaibei 235000, P.R. China.,School of Sciences, Mae Fah Luang University, Chiang Rai 57100, Thailand.,Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
| | - Vadim Yu Kryukov
- Institute of Systematics and Ecology of Animals, Siberian Branch of Russian Academy of Sciences, Frunze str., 11, Novosibirsk 630091, Russia
| | - Jian-Hua Ding
- School of Life Sciences, Huaibei Normal University, Huaibei 235000, P.R. China
| | - Rajesh Jeewon
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Reduit 80837, Mauritius
| | - Putarak Chomnunti
- School of Sciences, Mae Fah Luang University, Chiang Rai 57100, Thailand.,Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
| |
Collapse
|
42
|
Akutse KS, Subramanian S, Maniania NK, Dubois T, Ekesi S. Biopesticide Research and Product Development in Africa for Sustainable Agriculture and Food Security – Experiences From the International Centre of Insect Physiology and Ecology (icipe). FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2020. [DOI: 10.3389/fsufs.2020.563016] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
|
43
|
Ortega HE, Torres-Mendoza D, Cubilla-Rios L. Patents on Endophytic Fungi for Agriculture and Bio- and Phytoremediation Applications. Microorganisms 2020; 8:microorganisms8081237. [PMID: 32823804 PMCID: PMC7465599 DOI: 10.3390/microorganisms8081237] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/03/2020] [Accepted: 07/07/2020] [Indexed: 12/15/2022] Open
Abstract
Plant endophytic fungi spend all or part of their lives inside host tissues without causing disease symptoms. They can colonize the plant to protect against predators, pathogens and abiotic stresses generated by drought, salinity, high concentrations of heavy metals, UV radiation and temperature fluctuations. They can also promote plant growth through the biosynthesis of phytohormones and nutrient acquisition. In recent years, the study of endophytic fungi for biological control of plant diseases and pests has been intensified to try to reduce the ecological and public health impacts due the use of chemicals and the emergence of fungicide resistance. In this review, we examine 185 patents related to endophytic fungi (from January 1988 to December 2019) and discuss their applicability for abiotic stress tolerance and growth promotion of plants, as agents for biocontrol of herbivores and plant pathogens and bio- and phytoremediation applications.
Collapse
Affiliation(s)
- Humberto E. Ortega
- Laboratory of Tropical Bioorganic Chemistry, Faculty of Natural, Exact Sciences and Technology, University of Panama, Panama 0824, Panama; (H.E.O.); (D.T.-M.)
- Department of Organic Chemistry, Faculty of Natural, Exact Sciences and Technology, University of Panama, Panama 0824, Panama
| | - Daniel Torres-Mendoza
- Laboratory of Tropical Bioorganic Chemistry, Faculty of Natural, Exact Sciences and Technology, University of Panama, Panama 0824, Panama; (H.E.O.); (D.T.-M.)
- Vicerrectoría de Investigación y Postgrado, University of Panama, Panama 0824, Panama
| | - Luis Cubilla-Rios
- Laboratory of Tropical Bioorganic Chemistry, Faculty of Natural, Exact Sciences and Technology, University of Panama, Panama 0824, Panama; (H.E.O.); (D.T.-M.)
- Correspondence: ; Tel.: +507-6676-5824
| |
Collapse
|
44
|
Adeleke BS, Babalola OO. The endosphere microbial communities, a great promise in agriculture. Int Microbiol 2020; 24:1-17. [PMID: 32737846 DOI: 10.1007/s10123-020-00140-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/20/2020] [Accepted: 07/24/2020] [Indexed: 12/20/2022]
Abstract
Agricultural food production and sustainability need intensification to address the current global food supply to meet human demand. The continuous human population increase and other anthropogenic activities threaten food security. Agrochemical inputs have long been used in conventional agricultural systems to boost crop productivity, but they are disadvantageous to a safe environment. Towards developing environmentally friendly agriculture, efforts are being directed in exploring biological resources from soil and plant microbes. The survival of the rhizosphere and endosphere microbiota is influenced by biotic and abiotic factors. Plant microbiota live interdependently with the host plants. Endophytes are regarded as colonizer microbes inhabiting and establishing microbial communities within the plant tissue. Their activities are varied and include fixing atmospheric nitrogen, solubilizing phosphate, synthesis of siderophores, secretion of metabolite-like compounds containing active biocontrol agents in the control of phytopathogens, and induced systemic resistance that stimulates plant response to withstand stress. Exploring beneficial endophyte resources in the formulation of bio-inoculants, such as biofertilizers, as an alternative to agrochemicals (fertilizers and pesticides) in developing environmentally friendly agriculture and for incorporation into crop breeding and disease control program is promising. Therefore, in this review, endosphere microbial ecology, associating environmental factors, and their roles that contribute to their effectiveness in promoting plant growth for maximum agricultural crop productivity were highlighted.
Collapse
Affiliation(s)
- Bartholomew Saanu Adeleke
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho, 2735, South Africa
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho, 2735, South Africa.
| |
Collapse
|
45
|
Endophytes: Colonization, Behaviour, and Their Role in Defense Mechanism. Int J Microbiol 2020; 2020:6927219. [PMID: 32802073 PMCID: PMC7414354 DOI: 10.1155/2020/6927219] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 04/28/2020] [Accepted: 07/01/2020] [Indexed: 11/18/2022] Open
Abstract
Biotic and abiotic factors cause an enormous amount of yield and economical loss. However, endophytes can play a significant role in enhancing the tolerance of plants. Endophytes systematically colonize different parts of the host, but plants use a variety of defense mechanisms towards microbial infection. However, they have to survive the oxidative environments, and endophytes like Enterobacter sp. encode superoxide dismutases, catalases, and hydroperoxide reductases to cope up the oxidative stress during colonization. On the contrary, others produce subtilomycin which binds with flagella to affect flg22-induced plant defense. The behavior of endophytes can be affected by different genes in hydrolase activity when they come into contact with the host plant. The lifestyle of endophytes is influenced by environmental factors, the host, and microbial genotypes, as well as an imbalance in nutrient exchange between the microbe and the host. For instance, induction of PiAMT1 in root endophyte Piriformospora indica indicates depletion of nitrogen which plays as a triggering factor for activation of the saprotrophic program. Microbes enhance disease resistance through induced systemic resistance (ISR), and Bacillus cereus triggers ISR against Botrytis cinerea through an accumulation of the PR1 protein and activates MAPK signaling and WRKY53 gene expression by the JA/ET signaling pathway. Similarly, Trichoderma arundinaceum produces trichodiene that affects Botrytis cinerea through induction of defense-related genes encoding salicylic acid (SA) and jasmonate (JA). Overall, endophytes can play a vital role in disease management.
Collapse
|
46
|
Ment D, Raman S, Gal S, Ezra D, Palevsky E. Interactions of Metarhizium brunneum-7 with Phytophagous Mites Following Different Application Strategies. INSECTS 2020; 11:E330. [PMID: 32481489 PMCID: PMC7349670 DOI: 10.3390/insects11060330] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 11/26/2022]
Abstract
Metarhizium brunneum is a generalist entomopathogenic fungus known to be virulent against Acari. We investigated Metarhizium brunneum-7 (Mb7) interactions in three systems of phytophagous mites and their respective plant hosts: Volkamer lemon (Citrus volkameriana) and the citrus rust mite Phyllocoptruta oleivora; common bean (Phaseolus vulgaris) and the two-spotted spider mite Tetranychus urticae; and spring onion (Allium cepa) and the bulb mite Rhizoglyphus robini. All three mite species were susceptible to directly applied Mb7 conidia. Results obtained using the standard method for studying endophytic colonization vs. live confocal imaging of plant tissues using the green fluorescent protein (GFP)-transformed fungus differed markedly, demonstrating that microscopy validation was more definite than the standard process of recovery from plant tissue. Endophytic colonization was observed in conidium-infiltrated citrus leaves and in roots of onion plants treated with soil-drenched conidia, but not in common bean treated by either spray or drench of conidia. Endophytic colonization of citrus leaves did not affect the citrus mite population. Drench application in common bean reduced two-spotted mite population. Similarly, drench application in onion reduced bulb mite population. This study emphasizes the importance of the host plant effects on Mb7 control efficacy of mite pests, and the merits of live-imaging techniques in studying endophytic interaction.
Collapse
Affiliation(s)
- Dana Ment
- Department of Entomology and Nematology, Plant Protection Institute, Agricultural Research Organization (ARO), The Volcani Center, HaMaccabim Road 68, Rishon LeZion 7528809, Israel;
| | - Sukirtha Raman
- Department of Entomology and Nematology, Plant Protection Institute, Agricultural Research Organization (ARO), The Volcani Center, HaMaccabim Road 68, Rishon LeZion 7528809, Israel;
| | - Shira Gal
- Department of Entomology and Nematology, Plant Protection Institute, ARO, Newe Yaar Reseach Center, P.O. Box 1021, Ramat Yishay 30095, Israel; (S.G.); (E.P.)
| | - David Ezra
- Department of Plant Pathology and Weed Research, Plant Protection Institute, Agricultural Research Organization (ARO), The Volcani Center, HaMaccabim Road 68, Rishon LeZion 7528809, Israel;
| | - Eric Palevsky
- Department of Entomology and Nematology, Plant Protection Institute, ARO, Newe Yaar Reseach Center, P.O. Box 1021, Ramat Yishay 30095, Israel; (S.G.); (E.P.)
| |
Collapse
|
47
|
Ment D, Kokiçi H, de Lillo E. Preventative Approach to Microbial Control of Capnodis tenebrionis by Soil Application of Metarhizium brunneum and Beauveria bassiana. INSECTS 2020; 11:insects11050319. [PMID: 32456112 PMCID: PMC7291278 DOI: 10.3390/insects11050319] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/21/2020] [Accepted: 05/22/2020] [Indexed: 12/04/2022]
Abstract
Management of the Mediterranean flat-headed root-borer, Capnodis tenebrionis, is critical due to the larvae’s root localization. Neonate larvae can be exposed to natural enemies before penetrating the roots. Application of Metarhizium brunneum strain Mb7 and Beauveria bassiana strain GHA formulations on rice granules was investigated for their efficacy against C. tenebrionis larvae. Mb7 application, evaluated on apricot twigs, significantly and dose-dependently reduced colonization rates of neonates, with highest mortality at 108 conidia/g soil. Neonate susceptibility to Mb7 and GHA was evaluated on potted rootstocks (GF677 almond × peach, 2729 plum) planted in entomopathogenic fungi (EPF)-premixed soil (1.3–1.6 × 105 conidia/cm3 soil) or in EPF-free soil surface-treated with 5 g Mb7 fungal granules (1.25 × 109 conidia). Larval colonization rates were reduced 7.4-fold in 2729 by both fungi; only Mb7 completely prevented colonization of GF677 by larvae. Larvae inside plant galleries exhibited mycosis with EPF-treated soils and both fungi proliferated on larval frass. Mb7 conidia germinated in the rhizosphere of GF677, and conidia of both fungi remained viable throughout the trial. Galleria baiting technique was used on EPF-treated soil to evaluate EPF infectivity over time; Mb7 and GHA persisted 180 and 90 days post inoculation, respectively. The formulation (fungus-covered rice grains), delivery method (mixing with soil) and persistence (3–6 months) of Mb7 and GHA are feasible for potential field application to control C. tenebrionis.
Collapse
Affiliation(s)
- Dana Ment
- Department of Entomology, Nematology and Chemistry Units, Agricultural Research Organization, Volcani Center, Rishon LeZion 7505101, Israel
- Correspondence:
| | - Hysen Kokiçi
- Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti (DiSSPA), Sezione di Entomologia e Zoologia University of Bari “Aldo Moro”, I-70126 Bari, Italy; (H.K.); (E.d.L.)
| | - Enrico de Lillo
- Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti (DiSSPA), Sezione di Entomologia e Zoologia University of Bari “Aldo Moro”, I-70126 Bari, Italy; (H.K.); (E.d.L.)
| |
Collapse
|
48
|
Lira ACD, Mascarin GM, Delalibera Júnior Í. Microsclerotia production of Metarhizium spp. for dual role as plant biostimulant and control of Spodoptera frugiperda through corn seed coating. Fungal Biol 2020; 124:689-699. [PMID: 32690250 DOI: 10.1016/j.funbio.2020.03.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2019] [Revised: 03/29/2020] [Accepted: 03/31/2020] [Indexed: 10/24/2022]
Abstract
The fungal genus Metarhizium comprises entomopathogenic species capable of producing overwintering structures known as microsclerotia. These structures offer many advantages in pest control due to the formation of infective conidia in situ and their persistence in the environment under adverse conditions. In addition, the in vitro production of Metarhizium microsclerotia under controlled liquid fermentation is faster and with greater process control than the production of aerial conidia. However, the potential of Metarhizium microsclerotia to control pests from the orders Lepidoptera and Hemiptera is unexplored. In this study, we examined the ability of Metarhizium spp. microsclerotia to promote corn growth and to provide plant protection against Spodoptera frugiperda (Lepidoptera: Noctuidae) and Dalbulus maidis (Hemiptera: Cicadellidae), through seed coating using microsclerotial granules. A screening to find higher microsclerotia producers was conducted by culturing 48 native Brazilian isolates of Metarhizium spp. (Metarhizium anisopliae, Metarhizium robertsii, Metarhizium humberi and Metarhizium sp. indeterminate). The best microsclerotia producers, M. anisopliae ESALQ1814, M. robertsii ESALQ2450 and M. humberi ESALQ1638 improved the leaf area, plant height, root length, and dry weight of plants compared to un-inoculated plants. Significant reduction in S. frugiperda survival (mortality > 55% after 7 days) was observed when larvae were fed on corn plants treated with any of the three Metarhizium species. Conversely, survival of D. maidis adults were unaffected by feeding on fungus-inoculated plants. Our results suggest that microsclerotia of Metarhizium spp. may act as biostimulants and to provide protection against S. frugiperda in corn through seed coating, thus adding an innovative strategy into the integrated management of this major worldwide pest.
Collapse
Affiliation(s)
- Aline Cesar de Lira
- Departamento de Entomologia e Acarologia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo (ESALQ-USP), Av. Pádua Dias, 11, C.P. 9, Piracicaba, SP, 13418-900, Brazil
| | - Gabriel Moura Mascarin
- Embrapa Meio Ambiente, Rodovia SP-340, km 127.5, S/N - Tanquinho Velho, Jaguariúna, SP, 13820-000, Brazil.
| | - Ítalo Delalibera Júnior
- Departamento de Entomologia e Acarologia, Escola Superior de Agricultura "Luiz de Queiroz", Universidade de São Paulo (ESALQ-USP), Av. Pádua Dias, 11, C.P. 9, Piracicaba, SP, 13418-900, Brazil
| |
Collapse
|
49
|
Endophytic Beauveria bassiana promotes drought tolerance and early flowering in corn. World J Microbiol Biotechnol 2020; 36:47. [PMID: 32144505 DOI: 10.1007/s11274-020-02823-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 02/27/2020] [Indexed: 12/24/2022]
Abstract
Beauveria bassiana (Bals.) Vuillemin (B. bassiana) is an entomopathogenic fungus that establishes endophytic symbiosis with plants. In the present study, the effects of B. bassiana strains colonization in growing Zea mays L. (Z. mays), crop production, and drought tolerance were evaluated. Z. mays seeds were inoculated with B. bassiana strains (GHA, PTG4, and PTG6), using 1 × 106 blastospores/mL and methyl cellulose (MC) or cornstarch (CS) as adherents. Colonization was determined by B. bassiana recovery from plant tissues plated on PDA medium. Plant height, fresh and dry weight, and flowering time were analyzed to assess plant performance. Drought tolerance was evaluated by stopping watering for 10 days, watering again, and determining vigor recovery after 24 h. Results showed 100% endophytic roots colonization, regardless of adherent type or strain tested. Colonization was variable in shoots and leaves, but GHA strain achieved the highest inoculation rates, including 88% in stems and 50% in leaves, which did not depend on adherent type used; for PTG4 strain, adherent type had an important effect (MC = 100% stems and leaves; CS = 63% stems and 25% leaves). For PTG6 strain, the best adherent type was CS (71% stems and 75% leaves), whereas MC showed variable inoculation percentage (25% stems and 75% leaves). Interestingly, only MCPTG4 treatment showed consistent positive effects on germination percentage (day 5 = 46 ± 2%; day 14 = 87 ± 7%) compared with controls (CC = 63 ± 4%, CMC = 50 ± 3%, CCS = 47 ± 0%). In addition, the other treatments showed low germination percentages at day 5 (7 ± 7% to 46 ± 2%), which recovered at day 14 (53 ± 0% to 73 ± 8%), except for MCPTG6 treatment with 23 ± 10% germination. About plant performance, not significant effects on plant height and fresh/dry weight in all the treatments were observed. However, B. bassiana-treated plants, using either GHA, PTG4 or PTG6 strains, and MC as adherent, showed tolerance to drought and flowered one to two weeks earlier, providing evidence supporting further applications of these seed treatments in agricultural systems, for abiotic stress sustainable management practices.
Collapse
|
50
|
Effects of Seedling Age on Colonization Patterns of Citrus limon Plants by Endophytic Beauveria bassiana and Metarhizium anisopliae and Their Influence on Seedlings Growth. J Fungi (Basel) 2020; 6:jof6010029. [PMID: 32106557 PMCID: PMC7151192 DOI: 10.3390/jof6010029] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 02/19/2020] [Accepted: 02/21/2020] [Indexed: 11/17/2022] Open
Abstract
The inoculation methods, the fungal strains, and several other factors are known to influent the success of fungal entomopathogens colonization in plants. The physiological status of the plant could also be another determinant. In the present study, the ability of three strains of Beauveria bassiana and one strain of Metarhizium anisopliae to successfully colonize Citrus limon plants and the influence of seedling age on endophytic colonization success was examined. Three, 4, and 6 months old seedlings were inoculated with 10 mL of 1 × 108 conidial·mL−1 suspensions of each of the four fungal strains via foliar spraying. All fungal strains successfully colonized citrus seedlings and were sustained up to 2 months in colonized plants irrespective of the seedling age, with differences in the mean percentage colonization recorded at various post-inoculation periods among the fungal strains. The highest percent endophytic fungi recovery rate was recorded in the 3 months old seedlings, where fungal mycelia of inoculated fungi were successfully re-isolated from 65.6% of the untreated newly developed leaf and stem tissues. One strain of B. bassiana, BB Fafu-12, significantly improved seedling height and leaf number. The study demonstrates the influence of seedling age on B. bassiana and M. anisopliae successful colonization in the citrus plant.
Collapse
|