Authors: Monica De Palma, Teresa Docimo, Gianpiero Guida, Maria Salzano, Rossella Albrizio, Pasquale Giorio, Michelina Ruocco, Marina Tucci
- Institute of Biosciences and BioResources, Research Division Portici, National Research Council, Via Universita ` 133, 80055, Portici, Italy
- Institute for Agricultural and Forestry Systems in the Mediterranean, National Research Council, Piazzale Enrico Fermi 1, 80055, Portici, NA, Italy
- Institute for Sustainable Plant Protection, National Research Council, Piazzale Enrico Fermi 1, 80055, Portici, Italy
Publication: Environmental and Experimental Botany
Date: October 2021
Trichoderma spp. are beneﬁcial soil microorganisms used in sustainable agriculture for their ability to enhance plant performance under different environments. However, Trichoderma-activated mechanisms that help plants to cope with water stress are still not completely defined. We investigated morpho-physiological, biochemical and transcriptomic responses to PEG-induced short severe water stress in Trichoderma longibrachiatum-inoculated and non-inoculated Solanum lycopersicum. Trichoderma had significant biostimulation effects on the plant and, after stress, allowed recovery of growth and photosynthesis to the levels of unstressed plants. Whole-transcriptome analysis was carried out after 1 day of 15 % PEG treatment in 22-day Trichoderma-inoculated and non-inoculated plants. Under non-stress conditions, Trichoderma triggered an extensive transcriptional reprogramming, specifically modulating the expression of classes of transcription factors and of genes involved in photosynthesis, antioxidant defences and maintenance of a juvenile state. Though the effects of water stress were predominant, mainly boosting transcription of stress-responsive genes, pre-treatment with Trichoderma specifically affected genes involved in mitigation of stress damage. Our findings provide new insights into the plant interplay with Trichoderma, useful to further exploit rhizosphere fungi for the improvement of plant performance under limiting environments.