Induced reprogramming of oxidative stress responses in cucumber by Trichoderma asperellum (Iran 3062C) enhances defense against cucumber mosaic virus

Tamandegani, Parisa Rahimi; Sharifnabi, B.; Massah, Amir; Zahravi, M

doi:10.1016/j.biocontrol.2021.104779

Cited by 8 publications

(15 citation statements)

References 52 publications

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“…Thus, the obtained data suggest that Th23 could stimulate the host’s innate immune system and/or trigger SAR, resulting in TMV suppression and/or replication inhibition. The findings were consistent with those of Tamandegani et al [ 57 ], who reported that the pretreatment of soils with T. asperellum was associated with a significant reduction in CMV accumulation levels when compared with the untreated control cucumber plants. It was reported that Trichoderma-induced resistance to viral infection was usually associated with a reduction in virus concentration and disease severity, indicating that different defensive pathways were implicated [ 6 , 57 , 62 ].…”

Section: Discussionsupporting

confidence: 92%

“…The findings were consistent with those of Tamandegani et al [ 57 ], who reported that the pretreatment of soils with T. asperellum was associated with a significant reduction in CMV accumulation levels when compared with the untreated control cucumber plants. It was reported that Trichoderma-induced resistance to viral infection was usually associated with a reduction in virus concentration and disease severity, indicating that different defensive pathways were implicated [ 6 , 57 , 62 ]. The obtained results were consistent with the reported protective activities of different Trichoderma spp.…”

Section: Discussionsupporting

confidence: 92%

“…was associated with an increase in root length, shoot length, and dry weight compared to the control plants [ 9 , 54 , 55 , 56 ]. Generally, the severe morphological and physiological changes including mosaic symptoms that occur upon viral infection are linked to changes in chlorophyll content and result in reduced photosynthesis [ 21 , 57 ]. Thus, the changes in chlorophyll pigment content upon viral infection can be used to indicate the functional status of photosynthesis in plants [ 58 ].…”

Section: Discussionmentioning

confidence: 99%

“…These results were in agreement with the findings of other researchers who showed that the application of Trichoderma spp. increased the chlorophyll content of the treated plants [ 59 , 60 ], while chlorophyll reduction was associated with a viral infection [ 57 , 58 ]. Consequently, the application of Th23 strain can boost photosynthetic rates and efficiency in plants [ 10 ], primarily through enhancing the plant’s redox state [ 61 ].…”

Section: Discussionmentioning

confidence: 99%

“…It was shown that pretreating plants with Trichoderma spp. resulted in a considerable reduction in viral accumulation compared to nontreated plants [ 15 , 57 , 62 ].…”

Section: Discussionmentioning

confidence: 99%

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Trichoderma hamatum Strain Th23 Promotes Tomato Growth and Induces Systemic Resistance against Tobacco Mosaic Virus

Abdelkhalek

Al-Askar

Arishi

et al. 2022

JoF

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Trichoderma hamatum strain Th23, isolated from tomato roots, was molecularly identified using phylogenetic analysis based on ITS, tef1, and rpb2 gene sequences and evaluated for its efficiency in suppressing tobacco mosaic virus (TMV) infection for the first time. Under greenhouse conditions, the application of Th23 promoted tomato growth with significant increases in shoot and root parameters as well as improved total chlorophyll content. Compared to the nontreated tomato plants, the soil pretreatment of tomato plants 48 h before TMV inoculation produced a significant reduction in the TMV accumulation level by 84.69% and enhanced different growth parameters. In contrast, TMV had a deleterious impact on fresh and dry matter accumulation and inhibited photosynthetic capacity. Furthermore, the protective activity of Th23 was associated with a significant increase in reactive oxygen species scavenging enzymes (PPO, CAT, and SOD) as well as decreased nonenzymatic oxidative stress markers (H2O2 and MDA) compared to the TMV treatment at 15 days post-viral inoculation (dpi). In addition, considerable increases in the transcriptional levels of polyphenolic genes (HQT and CHS) and pathogenesis-related proteins (PR-1 and PR-7) were shown to induce systemic resistance against TMV. Consequently, the ability of T. hamatum strain Th23 to promote plant growth, induce systemic resistance, and boost innate immunity against TMV infestation supported the incorporation of Th23 as a potential biocontrol agent for managing plant viral infections. To the best of our knowledge, this is the first report of the antiviral activity of T. hamatum against plant viral infection.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…It was shown that pretreating plants with Trichoderma spp. resulted in a considerable reduction in viral accumulation compared to nontreated plants [ 15 , 57 , 62 ].…”

Section: Discussionmentioning

confidence: 99%

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