Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Similarities in the Behavior of Transcription Factors in Young Oil Palm (Elaeis guineensis Jacq.) Plants under Salt or Water Stress Provide Strategies to Develop Stress-Tolerant Oil Palm Plants at Once

Version 1 : Received: 7 July 2023 / Approved: 10 July 2023 / Online: 10 July 2023 (11:06:03 CEST)

How to cite: Salgado, F.F.; Carvalho da Silva, T.L.; Leão, A.P.; Togawa, R.C.; De Sousa, C.A.F.; Grynberg, P.; Souza Júnior, M.T. Similarities in the Behavior of Transcription Factors in Young Oil Palm (Elaeis guineensis Jacq.) Plants under Salt or Water Stress Provide Strategies to Develop Stress-Tolerant Oil Palm Plants at Once. Preprints 2023, 2023070578. https://doi.org/10.20944/preprints202307.0578.v1 Salgado, F.F.; Carvalho da Silva, T.L.; Leão, A.P.; Togawa, R.C.; De Sousa, C.A.F.; Grynberg, P.; Souza Júnior, M.T. Similarities in the Behavior of Transcription Factors in Young Oil Palm (Elaeis guineensis Jacq.) Plants under Salt or Water Stress Provide Strategies to Develop Stress-Tolerant Oil Palm Plants at Once. Preprints 2023, 2023070578. https://doi.org/10.20944/preprints202307.0578.v1

Abstract

In recent years, many studies have reported that several distinct families of transcription factor (TF) genes play crucial roles in the response of plants to abiotic stress. Although some of these families got systematically studied in many species, little knowledge exists about these genes in oil palm (Elaeis guineensis Jacq.). In this study, 20 genes differentially expressed in the leaves of oil palm plants subjected to salinity or drought stress and encoding TFs belonging to four families of TFs - MYB, HD-ZIP, NF-Y, and HSFF - got selected for further characterization. The genes underwent a structural and functional annotation, besides having their RNA-Seq expression profile validated by the qPCR technique, and a correlation analysis of their response under both stresses got performed. The annotation analysis of the promoter region showed the presence of seven cis-acting elements, all already reported to be involved in plants' response to abiotic stress. The structural and functional characterization of the proteins encoded by the selected genes showed that some groups present patterns of conserved regions and are orthologs to genes already linked to salinity or drought resistance in other plant species. It was possible to confirm the RNA-Seq expression profile of 19 genes, only gene 4 showed the opposite response when using qPCR. Through correlation analysis, it was possible to observe a high level of similarity in the behavior of the 20 genes in response to drought or salinity stress, a behavior already reported in other species. The results presented here shed light on the role of 20 TFs in the leaves of young oil palm plants under severe levels of soil salinity or water deprivation. The high level of similarity in the molecular response to both stresses allowed the identification of genes that might grant strategies aiming to develop oil palm plants with a tolerance to both salinity and drought at once.

Keywords

abiotic stress; tolerance; salinity; drought; transcriptome; MYB; NFY; HD-ZIP; HSFF

Subject

Biology and Life Sciences, Plant Sciences

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