BABA-induced pathogen resistance: a multi-omics analysis of the tomato response reveals a hyper-receptive status involving ethylene

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Authors

ZAPLETALOVÁ Martina RANCUREL Corinne INDUSTRI Benoit BARDIN Marc LE BRIGAND Kevin NICOT Philippe MAGNONE Virginie SEASSAU Aurélie BARBRY Pascal POTĚŠIL David ZDRÁHAL Zbyněk PONCHET Michel LOCHMAN Jan

Year of publication 2023
Type Article in Periodical
Magazine / Source Horticulture Research
MU Faculty or unit

Faculty of Science

Citation
Web https://doi.org/10.1093/hr/uhad068
Doi http://dx.doi.org/10.1093/hr/uhad068
Keywords BETA-AMINOBUTYRIC ACID; GENOME-WIDE IDENTIFICATION; PLANT DEFENSE; SALICYLIC-ACID; JASMONIC ACID; PHYTOTOXIN CORONATINE; ARABIDOPSIS; GENES; ACCUMULATION; ACTIVATION
Description Prior exposure to microbial-associated molecular patterns or specific chemical compounds can promote plants into a primed state with stronger defence responses. ß-aminobutyric acid (BABA) is an endogenous stress metabolite that induces resistance protecting various plants towards diverse stresses. In this study, by integrating BABA-induced changes in selected metabolites with transcriptome and proteome data, we generated a global map of the molecular processes operating in BABA-induced resistance (BABA-IR) in tomato. BABA significantly restricts the growth of the pathogens Oidium neolycopersici and Phytophthora parasitica but not Botrytis cinerea. A cluster analysis of the upregulated processes showed that BABA acts mainly as a stress factor in tomato. The main factor distinguishing BABA-IR from other stress conditions was the extensive induction of signaling and perception machinery playing a key role in effective resistance against pathogens. Interestingly, the signalling processes and immune response activated during BABA-IR in tomato differed from those in Arabidopsis with substantial enrichment of genes associated with jasmonic acid (JA) and ethylene (ET) signalling and no change in Asp levels. Our results revealed key differences between the effect of BABA on tomato and other model plants studied until now. Surprisingly, salicylic acid (SA) is not involved in BABA downstream signalization whereas ET and JA play a crucial role.
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