Antagonistic fungal endophytes and their metabolite-mediated interactions against phytopathogens in rice

Sornakili, Archana; Binodh, Asish K.; Sridharan, A. P.; Nithya, P.; Uthandi, Sivakumar

doi:10.1016/j.pmpp.2020.101525

Cited by 36 publications

(24 citation statements)

References 51 publications

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“…Penetration can be mechanical, through appressoria development [ 76 , 77 ], or enzymatic, through cellulase, glucanase, laccase, leucinoxin, lipase, pectinase, protease, chitinase or xylanase release, which are involved in the infection process [ 78 , 79 , 80 , 81 , 82 ]. Thus, in vitro production of cellulases, lipases, and xylases by P. tenuis [ 83 ], chitinases and proteases by P. fumosoroseus (Wize) A.H.S. Br.…”

Section: Biological Control Mechanisms Of the Genus Paecmentioning

confidence: 99%

“…Micrococcus sp., Aeromonas Hydrophila, Flavobacterium sp, Pseudomonas aeruginosa , and Vibrio cholera [ 116 , 117 ]. Sornakili et al [ 83 ] recently reported the inhibition of Erwinia carotovora, Xanthomonas oryzae pv oryzae , and Ralstonia solanacearum with in vitro inhibition between 13–45% using P. tenuis , an endophyte isolated from rice leaves. Various metabolites, such as octadecanoic acid, acetic acid, and 2-ethylhexyl ester, as well as enzymatic activities, xylanases, cellulases, and lipases, were involved in this control.…”

Section: Biological Control Of Diseases Caused By Phytopathogenic mentioning

confidence: 99%

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Paecilomyces and Its Importance in the Biological Control of Agricultural Pests and Diseases

Moreno-Gavíra

Huertas

Diánez

et al. 2020

Plants

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Incorporating beneficial microorganisms in crop production is the most promising strategy for maintaining agricultural productivity and reducing the use of inorganic fertilizers, herbicides, and pesticides. Numerous microorganisms have been described in the literature as biological control agents for pests and diseases, although some have not yet been commercialised due to their lack of viability or efficacy in different crops. Paecilomyces is a cosmopolitan fungus that is mainly known for its nematophagous capacity, but it has also been reported as an insect parasite and biological control agent of several fungi and phytopathogenic bacteria through different mechanisms of action. In addition, species of this genus have recently been described as biostimulants of plant growth and crop yield. This review includes all the information on the genus Paecilomyces as a biological control agent for pests and diseases. Its growth rate and high spore production rate in numerous substrates ensures the production of viable, affordable, and efficient commercial formulations for agricultural use.

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Section: Biological Control Mechanisms Of the Genus Paecmentioning

confidence: 99%

Section: Biological Control Of Diseases Caused By Phytopathogenic mentioning

confidence: 99%

Paecilomyces and Its Importance in the Biological Control of Agricultural Pests and Diseases

Moreno-Gavíra

Huertas

Diánez

et al. 2020

Plants

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“…Among fungi, Aspergillus species are ubiquitous and are recognised for the biosynthesis of a large number of enzymes and drug-lead compounds and to degrade a wide range of organic biomass significant for bioenergy conversion [31]. Endophytic Aspergillus flavus, Aspergillus terreus-F7, Aspergillus terreus EF6 and Aspergillus fumigatus, among Aspergillus species, have been found to possess antioxidant, anti-fungal and antibacterial activities [32][33][34][35]. In the course of our efforts to combat MDR, endophytic fungi associated with A. ferox Mill were isolated.…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Effect and Mode of Action of Secondary Metabolites from Fungal Endophyte Associated with Aloe ferox Mill

Maliehe

Mbambo

Nqotheni

et al. 2022

Microbiology Research

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The constant increase in drug resistance, occurrence of incurable diseases and high medical costs, have necessitated bio-prospecting of fungi as alternative sources of therapeutic compounds. This study aimed at assessing the antibacterial effect and mode of action of secondary metabolites from fungal endophyte associated with Aloe ferox Mill. Endophytic fungus was isolated from the gel of A. ferox and identified by internal transcribed spacer (ITS) rRNA gene sequence analysis. The targets of antibacterial activity were assessed based on minimum inhibitory concentration (MIC) and the effect of the extract on respiratory chain dehydrogenase (RCD) and membrane integrity. Fourier transform-infrared spectrophotometer (FTIR) was employed to ascertain functional groups. The fungus with the most promising antibiotic-production was identified as Aspergillus welwitschiae MK450668.1. Its extract exhibited antibacterial activity with the MIC values of 0.5 and 1 mg/mL against Staphylococcus aureus (ATCC 25925) and Escherichia coli (ATCC 25922). It demonstrated the inhibitory effect on the RCD activity and destruction of membrane integrity on the test bacteria. FTIR spectrum revealed hydroxyl, amine and alkene groups. A. welwitschiae MK450668.1 serves as a potential source of effective compounds to combat the challenge of drug resistance.

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“…Endophyte fungi described as PGPF include important genera like Fusarium, Trichoderma, Aspergillus, Penicillium, Colletotrichum, Cylindrocladium, and others; some of them are nonpathogenic or hypovirulent strains of plant pathogenic fungi [25,42]. Some soil fungi are pathogens of other microorganisms like bacteria [54], fungi and nematodes [55], plants [11], insects and arthropods [47]; for instance, Metarhizium anisopliae and Beauveria bassiana are endophytic and pathogenic in insects, while Paecelomyces lilacinus is endophytic and pathogenic in nematodes [55]; these fungi take part in the regulation of their hosts populations and they are of relevance in the biological control and management of agroecosystems [46]. As mentioned above soil fungi are included in several functional groups: decomposers, mutualists (mycorrhiza), endophytes, pathogens, parasites, and every one of these activities are of great relevance for the soil ecosystem function.…”

Section: Soil Fungimentioning

confidence: 99%

Soil Biodiversity and Root Pathogens in Agroecosystems

Guzmán¹

2022

Biodiversity of Ecosystems

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Soil ecosystem is a living and dynamic environment, habitat of thousands of microbial species, animal organisms and plant roots, integrated all of them in the food webs, and performing vital functions like organic matter decomposition and nutrient cycling; soil is also where plant roots productivity represent the main and first trophic level (producers), the beginning of the soil food web and of thousands of biological interactions. Agroecosystems are modified ecosystems by man in which plant, animal and microorganisms biodiversity has been altered, and sometimes decreased to a minimum number of species. Plant diseases, including root diseases caused by soil-borne plant pathogens are important threats to crop yield and they causes relevant economic losses. Soil-borne plant pathogens and the diseases they produce can cause huge losses and even social and environmental changes, for instance the Irish famine caused by Phytophthora infestans (1845–1853), or the harmful ecological alterations in the jarrah forests of Western Australia affected by Phytophthora cinnamomi in the last 100 years. How can a root pathogen species increase its populations densities at epidemic levels? In wild ecosystems usually we expect the soil biodiversity (microbiome, nematodes, mycorrhiza, protozoa, worms, etc.) through the trophic webs and different interactions between soil species, are going to regulate each other and the pathogens populations, avoiding disease outbreaks. In agroecosystems where plant diseases and epidemics are frequent and destructive, soil-borne plant pathogens has been managed applying different strategies: chemical, cultural, biological agents and others; however so far, there is not enough knowledge about how important is soil biodiversity, mainly microbiome diversity and soil food webs structure and function in the management of root pathogens, in root and plant health, in healthy food production, and maybe more relevant in the conservation of soil as a natural resource and derived from it, the ecosystem services important for life in our planet.

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Antagonistic fungal endophytes and their metabolite-mediated interactions against phytopathogens in rice

Cited by 36 publications

References 51 publications

Paecilomyces and Its Importance in the Biological Control of Agricultural Pests and Diseases

Paecilomyces and Its Importance in the Biological Control of Agricultural Pests and Diseases

Antibacterial Effect and Mode of Action of Secondary Metabolites from Fungal Endophyte Associated with Aloe ferox Mill

Soil Biodiversity and Root Pathogens in Agroecosystems

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