Effects of biocontrol agents and compost against the Phytophthora capsici of zucchini and their impact on the rhizosphere microbiota

Cucu, Maria Alexandra; Gilardi, G.; Pugliese, Massimo; Ferrocino, Ilario; Gullino, M. L.

doi:10.1016/j.apsoil.2020.103659

Cited by 23 publications

(13 citation statements)

References 96 publications

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“…60,74 In addition, BCA can suppress plant disease and promote plant health, which should not simply be attributed to a single bacterial or fungal taxon, but is most likely regulated by microbial consortia. 75 Therefore, soil microbial dynamic alteration triggered by BCA needs to be continuously monitored. On the other hand, environmental safety problems resulting from BCA-mediated alterations in soil microbial diversity still lack an effective and quantitative measurement method.…”

Section: Discussionmentioning

confidence: 99%

Impact of biocontrol microbes on soil microbial diversity in ginger (Zingiber officinaleRoscoe)

Huang

Liu

Yin

et al. 2021

Pest Management Science

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BACKGROUND: Bacteria are the most diverse and abundant group of soil organisms that influence plant growth and health. Bacillus and Trichoderma are commonly used as biological control agents (BCA) that directly or indirectly act on soil bacteria. Therefore, it is essential to understand how the applied microbes impact the indigenous microbial community before exploring their activity in the control of soilborne diseases.RESULTS: MiSeq sequencing of the 16S rRNA gene was used to decipher the shift of rhizosphere bacterial community in ginger (Zingiber officinale Roscoe) treated with Bacillus subtilus and Trichoderma harzianum at different concentrations. The dominant phyla in treated and nontreated samples were Proteobacteria, Actinobacteria, Acidobacteria and comprised up to 54.7% of the total sequences. There were significant differences between BCA treated and nontreated samples in the bacteria community. BCA treated plants presented higher bacterial diversity than nontreated and higher dosage of BCA had a larger impact on rhizosphere microbiota, but the 'dose-response relationship' varied in different bacterial groups. Potential biomarkers at genus level were found, such as RB41, Pseudomonas, Nitrospira, Candidatus_Udaeobacter. CONCLUSION:The combined use of Bacillus subtilus and Trichoderma harzianum could alter bacterial community structure and diversity in rhizosphere soil. BCA-microbes interactions as well as soil microbial ecology should be noticed in plant disease management.

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Section: Discussionmentioning

confidence: 99%

Impact of biocontrol microbes on soil microbial diversity in ginger (Zingiber officinaleRoscoe)

Huang

Liu

Yin

et al. 2021

Pest Management Science

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“…Also focusing on the crown and root rot of zucchini (Cucurbita pepo L.) caused by P. capsici, Cucu, and colleagues (2020) [48] amyloliquefaciens and B. velezensis against P. cinnamomi as well as against P. citricola, P. palmivora, and P. capsici in experiments in vitro and planta, and these species also presented plant-growth traits. They also reported the effects of the volatile organic compounds produced by these bacteria against P. capsici and the results were promising.…”

Section: Discussionmentioning

confidence: 99%

“…In general, their results reaffirmed the potential of B. subtilis and Trichoderma spp. as biocontrol agents for controlling P. capsici [48]. P. cinnamomi Rands infection is a destructive disease in avocado (Persea americana Mill.)…”

Section: In Planta Methodsmentioning

confidence: 99%

A systematic review about biological control of phytopathogenic Phytophthora cinnamomi

2022

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which represents a concerning economic problem, mainly in Portugal [2].The current management strategies for P. cinnamomi are limited due to the difficulty in diagnosis, as the plants remain symptomless until the late stages of the infection [3]. The prevention of soil flood and excessive moisture is a control strategy for this oomycete insofar as high soil moisture provides favorable conditions for P. cinnamomi to produce and increase the dispersal of zoospores [3,4]. The use of convenient irrigation and drainage techniques is used to avoid the growth of the soil-borne pathogen; however, they are effective only when the soil is not contaminated with zoospores. In this particular scenario, the soil needs to be cleaned with fumigation and other appropriate agrochemicals, to purge the P. cinnamomi [1,5]. Further management techniques include the use of seed treatments and resistant cultivars in zoospores-free soil and crop rotation. Whereas the first offers some flexibility to the producers, the last one is not widely used due to limitations of planting lands and the long-term survival of P. cinnamomi zoospores [6,7].The most commonly used management strategies for P. cinnamomi are phosphonate-based chemical fungicides (e.g. potassium phosphite) and phenylamide compounds (e.g. mefenoxam) [1,8]. Both of these fungicides are effective Altino Choupina

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“…By microscopic examination of the interaction zone, we demonstrated that T. gamsii, T. viridarium, T. olivascens, T. hamatum, T. hirsutum, and T. linzhiense parasitized the mycelium of P. cinnamomi though adherent growth, hyphal coiling, and vacuolization of the Phytophthora hyphae. T. gamsii is included in several commercial Trichoderma biocompounds, being a proven antagonist against several oomycetes such as Pythium irregulare [71], P. capsici [72], and Phytophthora parasitica [73]. Nonetheless, this work represents the first evidence of the antagonistic activity (mycoparasitism) of T. harzianum, T. viridarium, T. gamsii, T. olivascens, T. linzhiense, and T. hirsutum over P. cinnamomi.…”

Section: Trichoderma Spp Inhibiting P Cinnamomimentioning

confidence: 94%

Antagonistic Potential of Native Trichoderma spp. against Phytophthora cinnamomi in the Control of Holm Oak Decline in Dehesas Ecosystems

Ruíz-Gómez

Miguel-Rojas

2021

Forests

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Phytophthora root rot caused by the pathogen Phytophthora cinnamomi is one of the main causes of oak mortality in Mediterranean open woodlands, the so-called dehesas. Disease control is challenging; therefore, new alternative measures are needed. This study focused on searching for natural biocontrol agents with the aim of developing integrated pest management (IPM) strategies in dehesas as a part of adaptive forest management (AFM) strategies. Native Trichoderma spp. were selectively isolated from healthy trees growing in damaged areas by P. cinnamomi root rot, using Rose Bengal selective medium. All Trichoderma (n = 95) isolates were evaluated against P. cinnamomi by mycelial growth inhibition (MGI). Forty-three isolates presented an MGI higher than 60%. Twenty-one isolates belonging to the highest categories of MGI were molecularly identified as T. gamsii, T. viridarium, T. hamatum, T. olivascens, T. virens, T. paraviridescens, T. linzhiense, T. hirsutum, T. samuelsii, and T. harzianum. Amongst the identified strains, 10 outstanding Trichoderma isolates were tested for mycoparasitism, showing values on a scale ranging from 3 to 4. As far as we know, this is the first report referring to the antagonistic activity of native Trichoderma spp. over P. cinnamomi strains cohabiting in the same infected dehesas. The analysis of the tree health status and MGI suggest that the presence of Trichoderma spp. might diminish or even avoid the development of P. cinnamomi, protecting trees from the worst effects of P. cinnamomi root rot.

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Effects of biocontrol agents and compost against the Phytophthora capsici of zucchini and their impact on the rhizosphere microbiota

Cited by 23 publications

References 96 publications

Impact of biocontrol microbes on soil microbial diversity in ginger (Zingiber officinaleRoscoe)

Impact of biocontrol microbes on soil microbial diversity in ginger (Zingiber officinaleRoscoe)

A systematic review about biological control of phytopathogenic Phytophthora cinnamomi

Antagonistic Potential of Native Trichoderma spp. against Phytophthora cinnamomi in the Control of Holm Oak Decline in Dehesas Ecosystems

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