Genotype-specific responses to the effects of commercial Trichoderma formulations in lentil (Lens culinaris ssp. culinaris) in the presence and absence of the oomycete pathogen Aphanomyces euteiches

Prashar, Pratibha; Vandenberg, Albert

doi:10.1080/09583157.2017.1376035

Cited by 12 publications

(18 citation statements)

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“…This study investigated and documented plant genotype influence on the specific composition of the fungal community and Trichoderma strains colonizing the lentil roots, which was further influenced by the presence or absence of ARR. A previous study reported a genotype-specific influence of the same two Trichoderma strains on the agronomic performance of lentil genotypes under A. euteiches -infected and uninfected conditions [ 57 ]. Results indicated that despite the root colonization of all treated plants, the effect of Trichoderma treatments varied significantly, ranging from positive to negative, favorable to unfavorable, differentially effecting above and below-ground plant growth parameters of the lentil genotypes [ 57 ].…”

Section: Discussionmentioning

confidence: 99%

“…A previous study reported a genotype-specific influence of the same two Trichoderma strains on the agronomic performance of lentil genotypes under A. euteiches -infected and uninfected conditions [ 57 ]. Results indicated that despite the root colonization of all treated plants, the effect of Trichoderma treatments varied significantly, ranging from positive to negative, favorable to unfavorable, differentially effecting above and below-ground plant growth parameters of the lentil genotypes [ 57 ]. This suggested that there may be differences in the Trichoderma root population structure among the various lentil genotypes, as well as diverse responses in the presence or absence of A. euteiches .…”

Section: Discussionmentioning

confidence: 99%

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Effects of Lentil Genotype on the Colonization of Beneficial Trichoderma Species and Biocontrol of Aphanomyces Root Rot

et al. 2020

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Trichoderma species are opportunistic plant symbionts that are common in the root and rhizosphere ecosystems. Many Trichoderma species may enhance plant growth, nutrient acquisition, and disease resistance, and for these reasons, they are widely used in agriculture as biofertilizers or biocontrol agents. Host plant genotype and other microorganisms, such as root pathogens, may influence the efficacy of Trichoderma inoculants. Aphanomyces euteiches is an important soil-borne oomycete in western Canada that causes root rot in legume crops such as lentil and pea, and there is not yet any significantly resistant varieties or effective treatments available to control the disease. In this study, the composition of root-associated fungal communities and the abundance of Trichoderma species, T. harzianum strain T-22 and T. virens strain G41, was determined in the roots of eight Lens genotypes based on internal transcribed spacer (ITS) Illumina MiSeq paired-end sequencing, both in the presence and the absence of the root rot pathogen Aphanomyces euteiches. Biocontrol effects of T. harzianum on A. euteiches was also examined. Significant genotypic variations were observed in the composition of root-associated fungal communities and the abundance of the different Trichoderma species in the lentil roots. The presence of A. euteiches altered the composition of Trichoderma found associated to the lentil genotypes. Biocontrol of A. euteiches by T. harzianum T22 species was observed in vitro and positive correlations between the abundance of Trichoderma and plant root and shoot biomass were observed in vivo. These findings revealed that lentil genotype and infection by the phytopathogen A. euteiches greatly influenced the colonization of root-associated fungi and the abundance of the Trichoderma species, as well as the effect on plant growth promotion. The multipartite interactions observed among lentil genotypes, Trichoderma species and A. euteiches suggest possibilities to select compatible host-beneficial microbe combinations in lentil breeding programs and to develop application strategies to harness the beneficial effects of Trichoderma inoculants in sustainable crop production systems.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of Lentil Genotype on the Colonization of Beneficial Trichoderma Species and Biocontrol of Aphanomyces Root Rot

et al. 2020

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“…It is important to note that different legumes and AMF species were tested in these studies. It has been pointed out that the responses to soil fungi could be genotype-specific, instead of wild versus cultivated accessions of the legume in question (Prashar and Vandenberg, 2017). As discussed above, the response to soil fungi is probably not intentionally selected for during domestication.…”

Section: Amf Improve the Efficiency Of Rhizobium-mediated Nitrogen Asmentioning

confidence: 99%

“…Although there are few studies on the response of wild legumes to TR, current findings also suggest that the capability to respond to TR is retained in domesticated legumes. In a study on 23 wild and cultivated lentil accessions inoculated with commercial TR inocula, RootShield R (RS) and RootShield R Plus (RSP), based on Trichoderma harzianum T22 and Trichoderma virens G41, respectively, the wild accession, Lens tomentosus PI 572390, had enhancements in most of the tested agronomic traits such as root and shoot biomass (Prashar and Vandenberg, 2017). Positive effects on the cultivated accessions by such inoculations were also observed (Prashar and Vandenberg, 2017).…”

Section: The Capability To Respond To Amf and Trichoderma Spp (Tr) Imentioning

confidence: 99%

The Impacts of Domestication and Agricultural Practices on Legume Nutrient Acquisition Through Symbiosis With Rhizobia and Arbuscular Mycorrhizal Fungi

Liu

Contador

et al. 2020

Front. Genet.

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Legumes are unique among plants as they can obtain nitrogen through symbiosis with nitrogen-fixing rhizobia that form root nodules in the host plants. Therefore they are valuable crops for sustainable agriculture. Increasing nitrogen fixation efficiency is not only important for achieving better plant growth and yield, but it is also crucial for reducing the use of nitrogen fertilizer. Arbuscular mycorrhizal fungi (AMF) are another group of important beneficial microorganisms that form symbiotic relationships with legumes. AMF can promote host plant growth by providing mineral nutrients and improving the soil ecosystem. The trilateral legume-rhizobia-AMF symbiotic relationships also enhance plant development and tolerance against biotic and abiotic stresses. It is known that domestication and agricultural activities have led to the reduced genetic diversity of cultivated germplasms and higher sensitivity to nutrient deficiencies in crop plants, but how domestication has impacted the capability of legumes to establish beneficial associations with rhizospheric microbes (including rhizobia and fungi) is not well-studied. In this review, we will discuss the impacts of domestication and agricultural practices on the interactions between legumes and soil microbes, focusing on the effects on AMF and rhizobial symbioses and hence nutrient acquisition by host legumes. In addition, we will summarize the genes involved in legume-microbe interactions and studies that have contributed to a better understanding of legume symbiotic associations using metabolic modeling.

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“…In lentil, significant plant genotype effects were shown for the interaction with Trichoderma spp. in the presence of the pathogen A. euteiches (Prashar & Vandenberg, ). Although the Trichoderma spp.…”

Section: Complex Interactions Between Grain Legumes and Their Root‐asmentioning

confidence: 99%

Insights to plant–microbe interactions provide opportunities to improve resistance breeding against root diseases in grain legumes

Wille

Messmer

Studer

et al. 2018

Plant Cell & Environment

111

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Root and foot diseases severely impede grain legume cultivation worldwide. Breeding lines with resistance against individual pathogens exist, but these resistances are often overcome by the interaction of multiple pathogens in field situations. Novel tools allow to decipher plant-microbiome interactions in unprecedented detail and provide insights into resistance mechanisms that consider both simultaneous attacks of various pathogens and the interplay with beneficial microbes. Although it has become clear that plant-associated microbes play a key role in plant health, a systematic picture of how and to what extent plants can shape their own detrimental or beneficial microbiome remains to be drawn. There is increasing evidence for the existence of genetic variation in the regulation of plant-microbe interactions that can be exploited by plant breeders. We propose to consider the entire plant holobiont in resistance breeding strategies in order to unravel hidden parts of complex defence mechanisms. This review summarizes (a) the current knowledge of resistance against soil-borne pathogens in grain legumes, (b) evidence for genetic variation for rhizosphere-related traits, (c) the role of root exudation in microbe-mediated disease resistance and elaborates (d) how these traits can be incorporated in resistance breeding programmes.

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Genotype-specific responses to the effects of commercial Trichoderma formulations in lentil (Lens culinaris ssp. culinaris) in the presence and absence of the oomycete pathogen Aphanomyces euteiches

Cited by 12 publications

References 40 publications

Effects of Lentil Genotype on the Colonization of Beneficial Trichoderma Species and Biocontrol of Aphanomyces Root Rot

Effects of Lentil Genotype on the Colonization of Beneficial Trichoderma Species and Biocontrol of Aphanomyces Root Rot

The Impacts of Domestication and Agricultural Practices on Legume Nutrient Acquisition Through Symbiosis With Rhizobia and Arbuscular Mycorrhizal Fungi

Insights to plant–microbe interactions provide opportunities to improve resistance breeding against root diseases in grain legumes

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