terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 The surprising role of VvLYK6 in grapevine immune responses triggered by chitin oligomers

The surprising role of VvLYK6 in grapevine immune responses triggered by chitin oligomers

Abstract

For sustainable viticulture, the substitution of chemical inputs with biocontrol products has become one of the most considered strategies. This strategy is based on elicitor-triggered immunity that requires a deep understanding of the molecular mechanisms involved in plant defense activation. Plant immune responses are triggered through the perception of conserved microbe-associated molecular patterns (MAMPs) which are recognized by pattern recognition receptors (PRRs) at the plasma membrane. Chitin, the major component of fungal cell walls, is well known to elicit plant immune responses. In Vitis vinifera, knowledge about the perception and immune responses triggered by chitin oligomers is now better understood [1]. Among the LysM receptor-like kinases (LysM-RLKs) family of PRRs, which includes 16 members in Vitis vinifera, three of them (VvLYK1-1, VvLYK1-2 and VvLYK5-1) are involved in the perception of chitin oligomers to trigger plant immune responses [1,2]. Recently, another member of this family, named VvLYK6, was identified in grapevine as being overexpressed following a Botrytis cinerea infection. We characterized the role of VvLYK6 in plant immunity by overexpressing it in Arabidopsis thaliana and grapevine. Surprisingly, overexpression of VvLYK6 decreased chitin-induced MAPK activation, defense gene expression, callose deposition and increased plant sensitivity to fungal infections. According to these results, VvLYK6 negatively regulates chitin-induced defense reactions in grapevine and could be considered as a susceptibility gene in the context of fungal infections.

Acknowledgements: We acknowledge Institut Carnot Plant2Pro for funding the VitiLYKs project and DimaCell platform (Dijon, France) for the confocal microscopy.

References:
1) Roudaire T. et al. (2023) The grapevine LysM receptor-like kinase VvLYK5-1 recognizes chitin oligomers through its association with VvLYL1-1. Front. Plant Sci. 14:1130782 DOI 10.3389/fpls.2023.1130782

2) Brulé D. et al. (2019) The grapevine (Vitis vinifera) LysM receptor kinases VvLYK1-1 and VvLYK1-2 mediate chitooligosaccharide-triggered immunity. Plant Biotechnol. J. 17, 812–825. DOI 10.1111/pbi.13017

DOI:

Publication date: October 3, 2023

Issue: ICGWS 2023

Type: Article

Authors

Villette J.1*, Marzari T.1, Roudaire T.1, Klinguer A.1, Leborgne-Castel N.1, Héloir M-C.1, Poinssot B.1

1Agroécologie, CNRS, INRAE, Institut Agro, Univ. Bourgogne, Univ. Bourgogne Franche-Comté, Dijon, France.

Contact the author*

Keywords

grapevine, plant defense, LysM receptor-like kinase, defense inhibition

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Biodiversity and biocontrol ability of Trichoderma natural populations in soil vineyards from Castilla y León region (Spain)

Trichoderma is a microorganism present in many agricultural soils and some of its species could be used as natural biological control agents. In this work, the presence of natural populations of Trichoderma was estimated in soil vineyard and its biocontrol capacity against Phaeoacremonium minimum, one of the main agent causals of grapevine trunk diseases instead of using pesticides. Moreover, physicochemical variables in soil such as pH, organic matter and nutrients were evaluated to determine a possible correlation to natural populations of Trichoderma.

Read More

Genetic variation among wild grapes native to Japan

Domesticated grapes are assumed to have originated in the Middle East. However, a considerable number of species are native in East Asian countries such as China, Korea and Japan as well. Evidence suggests that a total of seven species and eight varieties have been found to be native to Japan. A wide level variation in morphology, genetic and fruit composition exist in wild grape native to Japan.

Read More

The use of δ13C as an indicator of water use efficiency for the selection of drought tolerant grapevine varieties

In the context of climate change with increasing evaporative demand, understanding the water use behavior of different grapevine cultivars is of critical importance. Carbon isotope discrimination (δ13C) measurements in wine provide a precise and integrated assessment of the water status of the vines during the sugar accumulation period in grape berries. When collected over multiple vintages on different cultivars, δ13C measurements can also provide insights into the effects of genotype on water use efficiency.

Read More

Phenolic composition profile of cv. Tempranillo wines obtained from severe shoot pruning vines under semiarid conditions

One of the limitations of vineyards in warm areas is the loss of wine quality due to higher temperatures during the grape ripening period. In order to adapt the vineyards to these new climatic conditions, a possible solution is to delay the ripening process of the grapes towards periods with milder temperatures, by means of management practices and thus improve the quality of the fruit and the wine produced. The technique of severe shoot pruning (SSP) has proven useful in achieving this objective.

Read More

Advancing grapevine science through genomic research

The seminar will examine the complexities and prospects of genomic research on Vitis species, characterize by exceptionally high heterozygosity and common interspecific gene flow. The seminar will showcase case studies highlighting the critical role of diploid genome references in grape research, specifically in areas such as aroma development, disease resistance, and domestication traits. It will also address the emerging focus on pangenomes within the Vitis genus, particularly in the context of genetic studies on naturally interbreeding populations.

Read More