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Article Abstract
Botryosphaeria dieback (BD) is a worldwide grapevine trunk disease constituting a serious threat for sustainable grapevine production, especially in the context of climate change. Effective treatments to control BD are still lacking, prompting the exploration of new non-chemical alternatives. Among these, BioControl Agents (BCAs), such as spp. and spp., described as promising. This study aims to thoroughly investigate the physiological changes in grapevines induced by two BCAs, ( PTA-271) and ( SC1), which are used to protect two cultivars from Bt67 (Np-Bt67) infection. Using non-target transcriptomic analysis (RNA-seq) and validation by qRT-PCR, this research offers novel insights into the molecular responses associated to Np-Bt67 infection in Chardonnay and Tempranillo cultivars, in relationship with the protective mechanisms conferred by each BCA. RNA-seq reveals that cultivars show no common transcriptional changes upon pathogen challenge. In Chardonnay, changes are mainly related to terpene/carotenoid pathways, while in Tempranillo, they mostly relate to amino acid transport and photosynthesis. Following the inoculation of protective BCA, changes are also distinct between infected cultivars: PTA-271 protecting effect against infected Chardonnay is mainly related to the phenylpropanoid pathway and secondary metabolic processes, whereas that of SC1 for Tempranillo correlates with much more metabolic changes. Consecutive validation by qRT-PCR provides markers indicating grapevine susceptibility vs. protection against Np-Bt67, some of which are shared by both cultivars. These markers could offer valuable tools for monitoring the health status of grapevine towards .
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| http://dx.doi.org/10.1094/PHYTO-12-24-0399-R | DOI Listing |
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