Trichoderma harzianum T-22 Induces Systemic Resistance in Tomato Infected by Cucumber mosaic virus

Abstract

Understanding the induction of plant defenses against viruses using biocontrol agents is essential for developing new strategies against these pathogens, given the ineffectiveness of chemical treatments. The ability of Trichoderma harzianum, strain T-22 (T22) to control Cucumber mosaic virus (CMV) in Solanum lycopersicum var. cerasiforme plants and the changes in the physiology of tomato treated/infected with T22/CMV were examined. Plant growth-promoting effects, photosynthetic performance, reactive oxygen species scavenging enzymes, and phytohormones were investigated. T22 improved tomato growth in terms of plant height and improved photosynthesis, total chlorophyll content and plant gas exchange. In contrast, CMV induced a negative effect on dry matter accumulation and inhibited the photosynthetic capacity. The analysis of plant hormones demonstrated that treating with T22 before or simultaneously to CMV infection, led to a systemic resistance by jasmonic acid/ethylene and salicylic acid signaling pathways. Conversely, systemic resistance was abscissic acid-dependent when T22 treatment was administered after the CMV infection. In conclusion, the data reported here indicate that the T22-based strategy may be the most effective measure against CMV.

Optimization of culture conditions for mass production and bio-formulation of Trichoderma using response surface methodology

“…Contreras-Cornejo et al (2009) and Akladious and Abbas (2014) in their study observed the significant increase in photosynthetic pigment in plants treated with Trichoderma. Shoresh (2010) and Vitti et al (2016) reported enhanced greenness and photosynthetic activity in maize and tomato plants, respectively, on inoculation with T. harzianum-T22 which may be attributed by reprogramming of plant gene expression. Prolonged photosynthetic activity in rice plants was found to be related with the increased root growth and distribution, attributed by the activity of Trichoderma spp.…”

Effectiveness of the Application of Organic Matter and Trichoderma Viride From Suppresive Soil to Control Fusarium Wilt on Banana Plant

“…Propagules density of Foc was not significantly different between all the treatments, but the incidence of fusarium wilt disease was significantly different. This might happen because the plants applied with T. viride were more resistant than the plants with no T. viride appliocation (Vitti et al, 2016;Nawrocka & Malolepsza, 2013). CONCLUSION Application of T. viride suppressed disease incidence up to 65%.…”

Effectiveness of Compost and Microbial-Enriched Compost to Suppress Powdery Mildew and Early Blight Diseases in Tomato

“…Istifadah and Hakim (2017) found that application of T. harzianum in planting media improved tomato resistance to early blight disease. Vitti et al (2016) also reported that T. harzianum was able to induce tomato resistance to cucumber mozaic virus.…”