Effects of temperature, light and incubation period on production, germination and bioactivity of<i>Trichoderma atroviride</i>

Daryaei, Amir; Jones, E. Eirian; Ghazalibiglar, H.; Glare, Travis R.; Falloon, R. E.

doi:10.1111/jam.13076

Cited by 28 publications

(19 citation statements)

References 37 publications

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“…S1a,b). This suggests a bimodal population cycle, possibly resulting from a bimodal conidium production cycle similar to that described previously (Daryaei et al 2016b), but following a different time frame. Although depletion of nutrients can stimulate conidium production (Horwitz et al 1985;Betina 1995), ageing-induced conidiation initiated by gene regulation has been postulated as the main stimulation for conidium production rather than nutrient status (Chovanec et al 2001).…”

Section: °C-dextrosesupporting

confidence: 78%

“…Similarly, previous studies have shown that T. atroviride LU132 outcompeted R. solani on dual plate assays (Daryaei et al . ,b,c,d,e). It has been suggested that Trichoderma metabolites contribute fungistatically to supress the growth and development of R. solani in soil or in agar dual cultures, which are proposed to be differentially modulated by NADPH oxidase (Dr Artemio Mendoza‐Mendoza 2014; personal communication).…”

Section: Discussionmentioning

confidence: 99%

“…This suggests a bimodal population cycle, possibly resulting from a bimodal conidium production cycle similar to that described previously (Daryaei et al . ), but following a different time frame. Although depletion of nutrients can stimulate conidium production (Horwitz et al .…”

Section: Discussionmentioning

confidence: 99%

“…atroviride LU132 were studied in agar plates (Daryaei et al . ,d,e). Fresh or dry conidia obtained from different culture‐growing conditions were also assessed (during 6 months of storage) for quantities of conidia produced and their quality, as indicated by germination and subsequent bioactivity against R. solani (see Daryaei et al .…”

Section: Introductionmentioning

confidence: 99%

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Culturing conditions affect biological control activity ofTrichoderma atrovirideagainstRhizoctonia solaniin ryegrass

et al. 2016

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This study is the first report on the effects of inoculum production conditions on conidium quality of Trichoderma to colonize and to maintain populations in host rhizospheres, and also the ability to promote plant growth and suppress a soil-borne disease. The results of these experiments provide new knowledge on how manipulation of culture conditions of T. atroviride LU132 can influence conidium fitness, as a basis for optimizing commercial production of the fungus as a biological control agent.

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Section: °C-dextrosesupporting

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Culturing conditions affect biological control activity ofTrichoderma atrovirideagainstRhizoctonia solaniin ryegrass

et al. 2016

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“…Esse microrganismo atua no controle de diversos fitopatógenos por diferentes mecanismos de ação, como antibiose, micoparasitismo, produção de enzimas degradadoras da parede celular, competição por nutrientes e substrato e indução de resistência (Pereira et al, 2014). Também são caracterizados por serem resistentes a substancias tóxicas produzidos por outros microrganismos e tolerantes a diferentes tipos de fungicidas (Daryaei et al, 2016), o que os tornam de elevado interesse para uso como agente de controle biológico de fitopatógenos.…”

Section: Introductionunclassified

Controle in vitro de Colletotrichum truncatum do feijão fava (Phaseolus lunatus) por Trichoderma spp.

2020

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A antracnose, causada por Colletotrichum truncatum é uma das principais ameaças a produção de feijão fava, com isso, medidas de controle devem ser tomadas, visando minimizar os problemas ocasionados por essa doença, como o uso de controle biológico a partir do emprego de Trichoderma spp.. Esta pesquisa objetivou-se avaliar o potencial antagônico de cepas de Trichoderma spp. sobre Colletotrichum truncatum, in vitro. Foram selecionados cinco isolados de Trichoderma spp. (TCH01, TCH02, TCH03, TCH04 e TCH05) no antagonismo a C. truncatum. Para testar o potencial antagônico das cepas de Trichoderma sobre o patógeno, foi realizado o teste de confronto direto através da metodologia de cultura pareada, no qual foi avaliado a classificação do agrupamento dos isolados do antagonista e exames microscópicos a procurando sinais de micoparasitismo. Foi realizado também o teste de antibiose, onde avaliou-se medição do diâmetro das colônias, porcentagem de inibição do crescimento micelial, taxa crescimento micelial, contagem de esporos e porcentagem de inibição da esporulação. Pelo teste de confronto direto, todos as cepas de Trichoderma spp. foram agrupados na classe 1, ou seja, os mesmos cresceram sobre a colônia do patógeno, ocupando toda placa. Também observou-se que os antagonistas possuem potencial contra C. truncatum no teste de antibiose, com inibição do crescimento micelial e esporulação variando de 74,7% a 82,0% e 78,7% a 89,3%, respectivamente. Todos as cepas avaliadas apresenta potencial antagônico sobre Colletotrichum truncatum.

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Evaluating the impact of turf‐care products on soil biological health

et al. 2020

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Golf courses require extensive use of inputs to meet the needs of playability and aesthetics. The impact of these inputs on soil biological health is largely unknown. Two field trials were conducted at a golf course in Georgia to evaluate short‐term effects of wetting agents (Cascade Plus and Duplex [C+D], Revolution [Rev]), plant growth regulators (PrimoMaxx [PM] and Cutless [CL]), and a product called PlantHelper (PH) on soil biological health by measuring microbial abundance and function. Quantitative polymerase chain reaction was used to measure microbial abundance, which included total bacteria, total fungi, and ammonia‐oxidizing prokaryotes. Soil respiration and enzyme assays were used as additional indicators of soil health. In bentgrass putting green, total bacteria and ammonia‐oxidizing bacteria decreased in abundance in response to the wetting agents and PH, indicating their sensitivity to the products. Whereas C+D stimulated urease activity, Rev and PH caused a short‐lived but immediate increase in respiration, indicating that they acted as labile carbon sources. In a bermudagrass fairway, PM was the only product that caused an increase in total bacteria abundance. PrimoMaxx and CL caused a delayed increase in respiration, suggesting that they may have affected the microorganisms indirectly through their impact on root growth and exudate production later. Although CL caused a decrease in urease activity, none of the products significantly affected phosphatase activity. Overall, the products did not seem to have a lasting impact on soil biological health, although long‐term studies are needed to confirm these observations.

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Effects of temperature, light and incubation period on production, germination and bioactivity ofTrichoderma atroviride

Abstract: Most studies on Trichoderma-based BCA have only shown the effect of culture conditions on the high conidia yield regardless of conidium quality. This study is the first report on conidium quality affected by principal culture conditions for Trichoderma biological control formulations.

Cited by 28 publications

References 37 publications

Culturing conditions affect biological control activity ofTrichoderma atrovirideagainstRhizoctonia solaniin ryegrass

Culturing conditions affect biological control activity ofTrichoderma atrovirideagainstRhizoctonia solaniin ryegrass

Controle in vitro de Colletotrichum truncatum do feijão fava (Phaseolus lunatus) por Trichoderma spp.

Evaluating the impact of turf‐care products on soil biological health

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