New isolates of Trichoderma spp. as biocontrol and plant growth–promoting agents in the pathosystem Pyrenophora teres-barley in Argentina

Moya, Paulina; Barrera, Viviana; Cipollone, Josefina; Bedoya, Carolina; Kohan, Lucila María; Toledo, Andrea; Sisterna, Marina Noemí

doi:10.1016/j.biocontrol.2019.104152

Cited by 33 publications

(30 citation statements)

References 44 publications

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“…In addition, VOCs inhibit mycelium growth and lead to unpigmented mycelium with vacuolization ( Moya et al, 2018 ). In the same way, Trichoderma isolates significantly decrease the severity of P. teres , up to 55% on barley seedlings, 70% on leaves and 77% on stems ( Moya et al, 2020 ). Finally, the fungus Clonostachys rosea isolate IK726 reduces the infection caused by P. teres under controlled conditions ( Jensen et al, 2016 ).…”

Section: Net Blotch Disease Managementmentioning

confidence: 85%

Pyrenophora teres: Taxonomy, Morphology, Interaction With Barley, and Mode of Control

et al. 2021

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Net blotch, induced by the ascomycete Pyrenophora teres, has become among the most important disease of barley (Hordeum vulgare L.). Easily recognizable by brown reticulated stripes on the sensitive barley leaves, net blotch reduces the yield by up to 40% and decreases seed quality. The life cycle, the mode of dispersion and the development of the pathogen, allow a quick contamination of the host. Crop residues, seeds, and wild grass species are the inoculum sources to spread the disease. The interaction between the barley plant and the fungus is complex and involves physiological changes with the emergence of symptoms on barley and genetic changes including the modulation of different genes involved in the defense pathways. The genes of net blotch resistance have been identified and their localizations are distributed on seven barley chromosomes. Considering the importance of this disease, several management approaches have been performed to control net blotch. One of them is the use of beneficial bacteria colonizing the rhizosphere, collectively referred to as Plant Growth Promoting Rhizobacteria. Several studies have reported the protective role of these bacteria and their metabolites against potential pathogens. Based on the available data, we expose a comprehensive review of Pyrenophora teres including its morphology, interaction with the host plant and means of control.

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Section: Net Blotch Disease Managementmentioning

confidence: 85%

Pyrenophora teres: Taxonomy, Morphology, Interaction With Barley, and Mode of Control

et al. 2021

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“…The morphologic parameters of the plants are due to the rates of their physiological processes. Many researchers report various mechanisms of action of microbiological preparations towards growth and the development of plants, including synthesis and complex interaction of phytohormones (Höflich et al, 1994;Vasil'yeva et al, 2019;Moya et al, 2020), mobilization of the substances (Shuliko et al, 2019), inhibition of pathogens as a result of synthesis of antibiotics, toxins and surfactants, and also the development of competition for the nutrients and place of colony of pathogenic bacteria (Veselova et al, 2019;Maksimov et al, 2020;Sabaté et al, 2020). The data obtained in the laboratory experiments show that the inoculation of biological preparations to the seeds has a stimulating effect on their germination.…”

Section: Discussionmentioning

confidence: 99%

“…Traditional agriculture, according to a number of authors (Lugtenberg & Kamilova, 2009;Porcel et al, 2014;Chebotar' et al, 2016), has run its course; maximum parameters of productivity of particular varieties of plants and breeds of animals have been achieved, soils are exhausted, groundwater and surface waters are more and more saturated with various chemical agents, pests develop resistance to fungicides, pesticides, etc. (Tsavkelova et al, 2006;Pérez-Montaño et al, 2014;Moya et al, 2020). At the same time, lack of resources and pursuit of profits stimulate the scientific search for cheap and intense methods of agricultural production.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the treatment regimen efficacy for columnaris disease in Pterophyllum scalare

Lavrinenko

Shulga

Передера

et al. 2020

Regul. Mech. Biosyst.

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The article presents the results of studies on the treatment scheme efficacy for columnaris in Pterophyllum scalare, common under private aquarium husbandry conditions. To establish the diagnosis, the clinical features of the diseased fish, pathological and anatomical changes and the results of microscopic and microbiological studies were taken into account. Separate chemical and microbiological parameters of aquarium water were also studied. It was established that fish disease developed against the background of adverse changes in the chemical composition and microbiocenosis of aquarium water. High alkalinity and excess of phosphates compared to the norm provoked accumulation of opportunistic microbiota, resulting in a balance disorder in the parasite-host system and development of clinical manifestation of the fish disease. During the disease outbreak, bacteriological indices of water indicated a high level of organic contamination and a low intensity of water self-purification processes. Clinically, the disease was manifested in P. scalare by decrease in appetite and motor activity, onset of ulcerative lesions of various shapes and sizes on the surface of the body and on the gill covers. Selected pure cultures of Flavobacterium columnare showed sensitivity to enrofloxacin (growth retardation zone 31.3 ± 1.0 mm); moderate resistance was found to tylosin. The microorganisms were resistant to amoxicillin, doxycycline, benzylpenicillin and tetracycline. Microscopic studies of intestinal specimens of dead P. scalare revealed numerous motile flagellates. It has been shown that an effective treatment regimen that provides recovery for 70% of diseased P. scalare is the use of enroxil 10% solution for five days, metronidazole three times a day, and “API MelaFix” for seven days. It is proved that the following measures are effective to restore the disrupted hydro-balance: periodic water replacement in the amount of 20% of the total volume, providing the aquarium with active aeration systems, planting slow-growing plants and reducing the amount of fish food provided. The measures developed were efficient, they led to elimination of the outbreak of columnaris in the P. scalare and to restoration of biological equilibrium in a closed aquatic ecosystem.

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“…Thus, the literature has shown that there are no differences when comparing the results for in vivo and in vitro assays. Moya et al (2020) evaluated native species of Trichoderma spp. as biological control agents for Pyrenophora teres through in vitro and in vivo assays, where in vitro assays were done through antagonism and in vivo assays were done in greenhouses.…”

Section: Shelf Lifementioning

confidence: 99%

Encapsulation of Trichoderma harzianum Preserves Enzymatic Activity and Enhances the Potential for Biological Control

Maruyama

Bilesky-José

Lima

et al. 2020

Front. Bioeng. Biotechnol.

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Trichoderma harzianum is a biological control agent used against phytopathogens and biostimulation in agriculture. However, its efficacy can be affected by biotic and abiotic factors, and microencapsulation has been used to maximize the efficacy. The objective was to develop polymeric microparticles to encapsulate T. harzianum, to perform physicochemical characterization to evaluate its stability, to evaluate effects on the soil microbiota, antifungal activity in vitro and enzymatic activity. Size distribution of wet and dry microparticles was 2000 and 800 µm, respectively. Scanning electron microscopy showed spherical morphology and encapsulation of T. harzianum. Photostability assays showed that encapsulation protected the fungus against ultraviolet radiation. The evaluation of the microbiota showed that the proportion of denitrifying bacteria increased when compared to the control. The T. harzianum encapsulation showed an improvement in the chitinolytic and cellulosic activity. In vitro tests showed that encapsulated fungus were able to provide a greater control of S. sclerotiorum.

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New isolates of Trichoderma spp. as biocontrol and plant growth–promoting agents in the pathosystem Pyrenophora teres-barley in Argentina

Cited by 33 publications

References 44 publications

Pyrenophora teres: Taxonomy, Morphology, Interaction With Barley, and Mode of Control

Pyrenophora teres: Taxonomy, Morphology, Interaction With Barley, and Mode of Control

Analysis of the treatment regimen efficacy for columnaris disease in Pterophyllum scalare

Encapsulation of Trichoderma harzianum Preserves Enzymatic Activity and Enhances the Potential for Biological Control

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