Trichoderma asperellum biocontrol activity and induction of systemic defenses against Sclerotium cepivorum in onion plants under tropical climate conditions

Rivera-Méndez, William; Obregón, M.; Morán-Diez, María E.; Hermosa, Rosa; Monte, Enrique

doi:10.1016/j.biocontrol.2019.104145

Cited by 70 publications

(33 citation statements)

References 43 publications

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“…(2: harzianum) The most common environmental opportunistic species with high suitability for biocontrol, plant growth promotion, and enzyme production are as follows: T. harzianum (Chaverri et al 2015), and the two sibling species, T. afroharzianum (Chaverri et al 2015) and T. guizhouense (Li et al 2013;Grujic et al 2019); and (3: asperellum) another common species with multiple applications in agriculture, T. asperellum (Rivera-Méndez et al 2020) and the two recently recognized sibling species, T. asperelloides (Samuels et al 2010) and T. yunnanense (Yu et al 2007).…”

Section: Trichoderma Species Can Be Identified Based On ≥ 99% and ≥mentioning

confidence: 99%

In honor of John Bissett: authoritative guidelines on molecular identification of Trichoderma

2021

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Modern taxonomy has developed towards the establishment of global authoritative lists of species that assume the standardized principles of species recognition, at least in a given taxonomic group. However, in fungi, species delimitation is frequently subjective because it depends on the choice of a species concept and the criteria selected by a taxonomist. Contrary to it, identification of fungal species is expected to be accurate and precise because it should predict the properties that are required for applications or that are relevant in pathology. The industrial and plant-beneficial fungi from the genus Trichoderma (Hypocreales) offer a suitable model to address this collision between species delimitation and species identification. A few decades ago, Trichoderma diversity was limited to a few dozen species. The introduction of molecular evolutionary methods resulted in the exponential expansion of Trichoderma taxonomy, with up to 50 new species recognized per year. Here, we have reviewed the genus-wide taxonomy of Trichoderma and compiled a complete inventory of all Trichoderma species and DNA barcoding material deposited in public databases (the inventory is available at the website of the International Subcommission on Taxonomy of Trichodermawww.trichoderma.info). Among the 375 species with valid names as of July 2020, 361 (96%) have been cultivated in vitro and DNA barcoded. Thus, we have developed a protocol for molecular identification of Trichoderma that requires analysis of the three DNA barcodes (ITS, tef1, and rpb2), and it is supported by online tools that are available on www.trichokey.info. We then used all the whole-genome sequenced (WGS) Trichoderma strains that are available in public databases to provide versatile practical examples of molecular identification, reveal shortcomings, and discuss possible ambiguities. Based on the Trichoderma example, this study shows why the identification of a fungal species is an intricate and laborious task that requires a background in mycology, molecular biological skills, training in molecular evolutionary analysis, and knowledge of taxonomic literature. We provide an in-depth discussion of species concepts that are applied in Trichoderma taxonomy, and conclude that these fungi are particularly suitable for the implementation of a polyphasic approach that was first introduced in Trichoderma taxonomy by John Bissett (1948–2020), whose work inspired the current study. We also propose a regulatory and unifying role of international commissions on the taxonomy of particular fungal groups. An important outcome of this work is the demonstration of an urgent need for cooperation between Trichoderma researchers to get prepared to the efficient use of the upcoming wave of Trichoderma genomic data.

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Section: Trichoderma Species Can Be Identified Based On ≥ 99% and ≥mentioning

confidence: 99%

In honor of John Bissett: authoritative guidelines on molecular identification of Trichoderma

2021

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“…Trichoderma achieves host tolerance by suppressing plant defenses through the action of various effectors [ 23 ]. Trichoderma -mediated global transcriptome and proteome changes in plants have been recorded and their effect on development, growth modulation, and defense were at the center of several recent articles [ 24 , 25 , 26 , 27 ]. Research in this area has provided several meaningful insights revealing sophisticated molecular mechanisms of interaction between Trichoderma and their host plants [ 28 , 29 , 30 ].…”

Section: Trichoderma -Plant Interactionsmentioning

confidence: 99%

Deciphering Trichoderma–Plant–Pathogen Interactions for Better Development of Biocontrol Applications

Alfiky

Weisskopf

2021

JoF

177

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Members of the fungal genus Trichoderma (Ascomycota, Hypocreales, Hypocreaceae) are ubiquitous and commonly encountered as soil inhabitants, plant symbionts, saprotrophs, and mycoparasites. Certain species have been used to control diverse plant diseases and mitigate negative growth conditions. The versatility of Trichoderma’s interactions mainly relies on their ability to engage in inter- and cross-kingdom interactions. Although Trichoderma is by far the most extensively studied fungal biocontrol agent (BCA), with a few species already having been commercialized as bio-pesticides or bio-fertilizers, their wide application has been hampered by an unpredictable efficacy under field conditions. Deciphering the dialogues within and across Trichoderma ecological interactions by identification of involved effectors and their underlying effect is of great value in order to be able to eventually harness Trichoderma’s full potential for plant growth promotion and protection. In this review, we focus on the nature of Trichoderma interactions with plants and pathogens. Better understanding how Trichoderma interacts with plants, other microorganisms, and the environment is essential for developing and deploying Trichoderma-based strategies that increase crop production and protection.

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“…to reprogram plants' gene expressions so as to lead to the induction of systemic resistance (Shoresh et al, 2010;Poveda et al, 2019). For example, T. asperellum has been able to control white rot disease caused by Sclerotium cepivorum in onion plants by up-regulating the expression of biocontrol-related genes such as AcPR1, AcPAL1, AcLOX1, and AcEIN3 (Rivera-Mendez et al, 2020).…”

Section: Control Of Biotic Stresses Including Diseases Insect Pestsmentioning

confidence: 99%

“…The ability of T. asperellum to control white rot is only a subset of its capabilities. They can control disease, and have other benefits, including enhancement of growth, yield, and physiological parameters (Rivera-Mendez et al, 2020). Moreover, a study in inoculated rice seedlings revealed that T. asperellum can up-regulate numerous genes that were involved in plant defense responses and in systemic acquired resistance (SAR) signaling (Doni et al, 2019a).…”

Section: Control Of Biotic Stresses Including Diseases Insect Pestsmentioning

confidence: 99%

Benefits to Plant Health and Productivity From Enhancing Plant Microbial Symbionts

et al. 2021

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Plants exist in close association with uncountable numbers of microorganisms around, on, and within them. Some of these endophytically colonize plant roots. The colonization of roots by certain symbiotic strains of plant-associated bacteria and fungi results in these plants performing better than plants whose roots are colonized by only the wild populations of microbes. We consider here crop plants whose roots are inhabited by introduced organisms, referring to them as Enhanced Plant Holobionts (EPHs). EPHs frequently exhibit resistance to specific plant diseases and pests (biotic stresses); resistance to abiotic stresses such as drought, cold, salinity, and flooding; enhanced nutrient acquisition and nutrient use efficiency; increased photosynthetic capability; and enhanced ability to maintain efficient internal cellular functioning. The microbes described here generate effects in part through their production of Symbiont-Associated Molecular Patterns (SAMPs) that interact with receptors in plant cell membranes. Such interaction results in the transduction of systemic signals that cause plant-wide changes in the plants’ gene expression and physiology. EPH effects arise not only from plant-microbe interactions, but also from microbe-microbe interactions like competition, mycoparasitism, and antibiotic production. When root and shoot growth are enhanced as a consequence of these root endophytes, this increases the yield from EPH plants. An additional benefit from growing larger root systems and having greater photosynthetic capability is greater sequestration of atmospheric CO2. This is transferred to roots where sequestered C, through exudation or root decomposition, becomes part of the total soil carbon, which reduces global warming potential in the atmosphere. Forming EPHs requires selection and introduction of appropriate strains of microorganisms, with EPH performance affected also by the delivery and management practices.

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Trichoderma asperellum biocontrol activity and induction of systemic defenses against Sclerotium cepivorum in onion plants under tropical climate conditions

Cited by 70 publications

References 43 publications

In honor of John Bissett: authoritative guidelines on molecular identification of Trichoderma

In honor of John Bissett: authoritative guidelines on molecular identification of Trichoderma

Deciphering Trichoderma–Plant–Pathogen Interactions for Better Development of Biocontrol Applications

Benefits to Plant Health and Productivity From Enhancing Plant Microbial Symbionts

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