In order for endophytic fungi to grow asymptomatically in their plant hosts, a balance of antagonisms is presumed to exist between host defence and fungal virulence. However, in planta, endophytic ...fungi must deal with multiple organismal interactions, primarily with bacteria and other fungi. We hypothesize that the plethora of antibacterial and antifungal metabolites that endophytic fungi produce has the function of maintaining balances of antagonisms with microbial competitors, resulting in a compatible multipartite symbiosis. Results obtained from co-cultures of endophytic and rhizospheric fungi with Pseudomonas aeruginosa and of endophytic fungi with Hymenoscyphus fraxineus, pathogen of the European ash, corroborate this hypothesis.
The escalating demand for secondary metabolites in international markets poses a severe threat to many plant species. An unscrupulous collection is also the immediate challenge to the survival of ...many unthreatened as well as vulnerable plants. Fungal endophytes have emerged in recent years as a promising substitute for sources of plant secondary metabolites. Many appealing secondary metabolites with potent antibacterial, antifungal, insecticidal, antioxidant, cytotoxic and anticancer properties have been discovered from endophytic fungi. Concerning their distinctive genetic and metabolic diversity and promising activities, they hold a plausible application in medicine and industry. However, there is little success in utilizing the pharmaceutical potential of fungal endophytes. Cutting-edge research is desirable to establish and bolster in vitro biosynthetic proficiency of fungal endophytes. Modern biotechnological techniques such as multilocus sequence typing (MLST), metabolomics, metagenomics and next-generation sequencing (NGS) technologies and bioinformatics approaches can fill a gap in fungal endophyte research. The present review focuses on how advanced chemical, biotechnological and computational molecular biology methods can be used for robust exploitation of bioactive compounds from these microorganisms.
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Endophytic fungi were isolated from needle leaves of two conifer species in Korea. The fungal isolates were identified based on their morphological characteristics and phylogenetic analyses of their ...internal transcribed spacer and large-subunit rDNA regions. Three species of endophytic fungi, namely Celosporium laricicola, Neocatenulostroma germanicum, and Phaeophleospora eucalypticola were the first records in Korea. In this study, we reported the morphological and phylogenetic characteristics of these fungi.
The incorporation of entomopathogenic fungi as biocontrol agents into Integrated Pest Management (IPM) programs without doubt, has been highly effective. The ability of these fungal pathogens such as
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to exist as endophytes in plants and protect their colonized host plants against the primary herbivore pests has widely been reported. Aside this sole role of pest management that has been traditionally ascribed to fungal endophytes, recent findings provided evidence of other possible functions as plant yield promoter, soil nutrient distributor, abiotic stress and drought tolerance enhancer in plants. However, reports on these additional important effects of fungal endophytes on the colonized plants remain scanty. In this review, we discussed the various beneficial effects of endophytic fungi on the host plants and their primary herbivore pests; as well as some negative effects that are relatively unknown. We also highlighted the prospects of our findings in further increasing the acceptance of fungal endophytes as an integral part of pest management programs for optimized crop production.
It is now evident that entomopathogenic fungi are able to colonize plant tissues as symptomless endophytes. Although most data so far published in this regard refer to Beauveria bassiana as an ...endophytic fungus, two other entomopathogenic fungi, viz. Metarhizium anisopliae and Lecanicillium lecanii have also been shown to colonize plant tissues endophytically. Several recent studies have also shown reasonable detrimental effects on herbivorous insects feeding on plants harbouring these fungi as endophytes. However, data published so far are highly variable and not consistent with regard to the underlying mechanisms which would allow explaining these effects. Growth conditions, specific cultivar features, or interactions with other microorganisms may impact the effect of these endophytic entomopathogenic fungi on the herbivorous insects. Furthermore, other fungi may block the systemic growth of the fungi in plant parts distant to the point of inoculation. Other parameters which need to be taken into account for using these fungi as biocontrol agents are the level of mycotoxins produced in plants, the level of pest reduction and the nature of formulations allowing a consistent colonization of the crop plants. This review discusses these and other problems related to the use of entomopathogenic fungi as endophytic biocontrol agents.
The agricultural sustainability concept considers higher food production combating biotic and abiotic stresses, socio-economic well-being, and environmental conservation. On the contrary, global ...warming-led climatic changes have appalling consequences on agriculture, generating shifting rainfall patterns, high temperature, CO
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, drought, etc., prompting abiotic stress conditions for plants. Such stresses abandon the plants to thrive, demoting food productivity and ultimately hampering food security. Though environmental issues are natural and cannot be regulated, plants can still be enabled to endure these abnormal abiotic conditions, reinforcing the stress resilience in an eco-friendly fashion by incorporating fungal endophytes. Endophytic fungi are a group of subtle, non-pathogenic microorganisms establishing a mutualistic association with diverse plant species. Their varied association with the host plant under dynamic environments boosts the endogenic tolerance mechanism of the host plant against various stresses
via
overall modulations of local and systemic mechanisms accompanied by higher antioxidants secretion, ample enough to scavenge Reactive Oxygen Species (ROS) hence, coping over-expression of defensive redox regulatory system of host plant as an aversion to stressed condition. They are also reported to ameliorate plants toward biotic stress mitigation and elevate phytohormone levels forging them worthy enough to be used as biocontrol agents and as biofertilizers against various pathogens, promoting crop improvement and soil improvement, respectively. This review summarizes the present-day conception of the endophytic fungi, their diversity in various crops, and the molecular mechanism behind abiotic and biotic resistance prompting climate-resilient aided sustainable agriculture.
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