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  The study of hormonal metabolism of Trincadeira and Syrah cultivars indicates new roles of salicylic acid, jasmonates, ABA and IAA during grape ripening and upon infection with Botrytis cinerea

Coelho, J., Almeida-Trapp, M., Pimentel, D., Soares, F. M., Reis, P., Rego, C., et al. (2019). The study of hormonal metabolism of Trincadeira and Syrah cultivars indicates new roles of salicylic acid, jasmonates, ABA and IAA during grape ripening and upon infection with Botrytis cinerea. Plant Science, 283, 266-277. doi:10.1016/j.plantsci.2019.01.024.

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Coelho, João, Author
Almeida-Trapp, Marilia1, Author              
Pimentel, Diana, Author
Soares, Flávio M., Author
Reis, Pedro, Author
Rego, Cecilia, Author
Mithöfer, Axel1, Author              
Fortes, Ana Margarida, Author
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1Research Group Plant Defense Physiology, Dr. Axel Mithöfer, MPI for Chemical Ecology, Max Planck Society, ou_3022756              

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 Abstract: Hormones play an important role in fruit ripening and in response to biotic stress. Nevertheless, analyses of hormonal profiling during plant development and defense are scarce. In this work, changes in hormonal metabolism in grapevine (Vitis vinifera) were compared between a susceptible (Trincadeira) and a tolerant (Syrah) variety during grape ripening and upon infection with Botrytis cinerea. Infection of grapes with the necrotrophic pathogen Botrytis cinerea leads to significant economic losses worldwide. Peppercorn-sized fruits were infected in the field and mock-treated and infected berries were collected at green, veraison and harvest stages for hormone analysis and targeted qPCR analysis of genes involved in hormonal metabolism and signaling. Results indicate a substantial reprogramming of hormonal metabolism during grape ripening and in response to fungal attack. Syrah and Trincadeira presented differences in the metabolism of abscisic acid (ABA), indole-3-acetic acid (IAA) and jasmonates during grape ripening that may be connected to fruit quality. On the other hand, high basal levels of salicylic acid (SA), jasmonates and IAA at an early stage of ripening, together with activated SA, jasmonates and IAA signaling, likely enable a fast defense response leading to grape resistance/ tolerance towards B. cinerea. The balance among the different phytohormones seems to depend on the ripening stage and on the intra-specific genetic background and may be fundamental in providing resistance or susceptibility. In addition, this study indicated the involvement of SA and IAA in defense against necrotrophic pathogens and gains insights into possible strategies for conventional breeding and/or gene editing aiming at improving grape quality and grape resistance against Botrytis cinerea.

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 Dates: 2019-022019-03-12
 Publication Status: Published online
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 Identifiers: Other: MIT003
DOI: 10.1016/j.plantsci.2019.01.024
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Title: Plant Science
Source Genre: Journal
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Publ. Info: Shannon [Clare] : Elsevier
Pages: - Volume / Issue: 283 Sequence Number: - Start / End Page: 266 - 277 Identifier: ISSN: 0168-9452
CoNE: https://pure.mpg.de/cone/journals/resource/954925485718