Cellulase from Trichoderma harzianum interacts with roots and triggers induced systemic resistance to foliar disease in maize

Saravanakumar, Kandasamy; Fan, Lili; Fu, Kehe; Yu, Chuanjin; Wang, Meng; Xia, Hao; Sun, Jianan; Li, Yaqian; Chen, Jie

doi:10.1038/srep35543

Cited by 88 publications

(39 citation statements)

References 63 publications

(69 reference statements)

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“…The absence of ROS as signaling molecules in the ∆noxR mutant may stimulate the release of metabolites or enzymes such as cellulases (glycoside‐hydrolases), which induce the activation of the stress pathways. For instance, the cellulases Thph1 and Thph2 of Trichoderma harzianum induced the jasmonate/ET signaling pathway in maize and improved their ability to contend with Fusarium graminearum infection, whereas mutants in these genes failed to trigger this protective effect in the plant (Saravanakumar et al ., 2016, 2018). Similarly, the noxR mutant conferred slightly higher resistance to Botrytis.…”

Section: Discussionmentioning

confidence: 99%

The fungal NADPH oxidase is an essential element for the molecular dialog between Trichoderma and Arabidopsis

Villalobos-Escobedo¹,

Esparza‐Reynoso

Pelagio‐Flores

et al. 2020

The Plant Journal

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SUMMARY Members of the fungal genus Trichoderma stimulate growth and reinforce plant immunity. Nevertheless, how fungal signaling elements mediate the establishment of a successful Trichoderma−plant interaction is largely unknown. In this work, we analyzed growth, root architecture and defense in an Arabidopsis−Trichoderma co‐cultivation system, including the wild‐type (WT) strain of the fungus and mutants affected in NADPH oxidase. Global gene expression profiles were assessed in both the plant and the fungus during the establishment of the interaction. Trichoderma atroviride WT improved root branching and growth of seedling as previously reported. This effect diminished in co‐cultivation with the ∆nox1, ∆nox2 and ∆noxR null mutants. The data gathered of the Arabidopsis interaction with the ∆noxR strain showed that the seedlings had a heightened immune response linked to jasmonic acid in roots and shoots. In the fungus, we observed repression of genes involved in complex carbohydrate degradation in the presence of the plant before contact. However, in the absence of NoxR, such repression was lost, apparently due to a poor ability to adequately utilize simple carbon sources such as sucrose, a typical plant exudate. Our results unveiled the critical role played by the Trichoderma NoxR in the establishment of a fine‐tuned communication between the plant and the fungus even before physical contact. In this dialog, the fungus appears to respond to the plant by adjusting its metabolism, while in the plant, fungal perception determines a delicate growth−defense balance.

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Section: Discussionmentioning

confidence: 99%

The fungal NADPH oxidase is an essential element for the molecular dialog between Trichoderma and Arabidopsis

Villalobos-Escobedo¹,

Esparza‐Reynoso

Pelagio‐Flores

et al. 2020

The Plant Journal

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“…Little attention has however been given to the occurrence of non-pathogenic fungal species, including Fusarium spp. in root microbial communities ( Zakaria and Ning 2013 ; Jumpponen et al 2017 ; LeBlanc et al 2017 ), while comprehensive DNA sequence-based surveys have been directed mostly to the study of highly relevant and abundant rhizosphere fungal genera such as Trichoderma Pers., Verticillium Nees or mycorrhizal fungi ( Zachow et al 2009 ; Bent et al 2011 ; Ruano-Rosa et al 2016 ; Saravanakumar et al 2016 ).…”

Section: Introductionmentioning

confidence: 99%

New Fusarium species from the Kruger National Park, South Africa

Sandoval-Denis¹,

Swart²,

Crous³

2018

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Three new Fusarium species, F. convolutans, F. fredkrugeri, and F. transvaalense (Ascomycota, Hypocreales, Nectriaceae) are described from soils collected in a catena landscape on a research supersite in the Kruger National Park, South Africa. The new taxa, isolated from the rhizosphere of three African herbaceous plants, Kyphocarpa angustifolia, Melhania acuminata, and Sida cordifolia, are described and illustrated by means of morphological and multilocus molecular analyses based on sequences from five DNA loci (CAL, EF-1 α, RPB1, RPB2 and TUB). According to phylogenetic inference based on Maximum-likelihood and Bayesian approaches, the newly discovered species are distributed in the Fusarium buharicum, F. fujikuroi, and F. sambucinum species complexes.

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“…These gene products (Thph1 and Thph2) prime the production of ROS (reactive oxygen species) and increased the cytoplasmic calcium content of maize leaf. They equally increased the expression of the jasmonic acid/ethylene defense signaling pathway in the non-genetic modified maize plant for efficient protection against the disease (Saravanakumar et al, 2016 ). The colonization of maize plant by T. harzianum induced the plant’s systemic resistance to the pathogen Curvularia lunata by priming the expression of the gene PAF-AH (platelet activating factor acetylhydrolase).…”

Section: Endophytes In the Activation Of Plants’ Immunity—systemic Inmentioning

confidence: 99%

The impact of microbes in the orchestration of plants’ resistance to biotic stress: a disease management approach

Enebe

Babalola

2018

Appl Microbiol Biotechnol

134

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The struggle for survival is a natural and a continuous process. Microbes are struggling to survive by depending on plants for their nutrition while plants on the other hand are resisting the attack of microbes in order to survive. This interaction is a tug of war and the knowledge of microbe-plant relationship will enable farmers/agriculturists improve crop health, yield, sustain regular food supply, and minimize the use of agrochemicals such as fungicides and pesticides in the fight against plant pathogens. Although, these chemicals are capable of inhibiting pathogens, they also constitute an environmental hazard. However, certain microbes known as plant growth-promoting microbes (PGPM) aid in the sensitization and priming of the plant immune defense arsenal for it to conquer invading pathogens. PGPM perform this function by the production of elicitors such as volatile organic compounds, antimicrobials, and/or through competition. These elicitors are capable of inducing the expression of pathogenesis-related genes in plants through induced systemic resistance or acquired systemic resistance channels. This review discusses the current findings on the influence and participation of microbes in plants’ resistance to biotic stress and to suggest integrative approach as a better practice in disease management and control for the achievement of sustainable environment, agriculture, and increasing food production.

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Cellulase from Trichoderma harzianum interacts with roots and triggers induced systemic resistance to foliar disease in maize

Cited by 88 publications

References 63 publications

The fungal NADPH oxidase is an essential element for the molecular dialog between Trichoderma and Arabidopsis

The fungal NADPH oxidase is an essential element for the molecular dialog between Trichoderma and Arabidopsis

New Fusarium species from the Kruger National Park, South Africa

The impact of microbes in the orchestration of plants’ resistance to biotic stress: a disease management approach

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