MECHANISMS INVOLVED IN THE OUTLIER RESPONSE OF PROSOPIS TAMARUGO TO BREAK THE TRADE-OFF BETWEEN DESICCATION TOLERANCE AND PHOTOSYNTHETIC CAPACITY

Humberto Gajardo Balboa; Melanie Morales; Dariel López Hernández; Ana Luisa Luengo Escobar; Mariana Machado Rocha; Adriano Nunes Nesi; Rafael E. Coopman; Gago, Xurxo; León Aloys Bravo Ramírez

Paper Title

Authors

Humberto Gajardo Balboa
Melanie Morales
Dariel López Hernández
Ana Luisa Luengo Escobar
Mariana Machado Rocha
Adriano Nunes Nesi
Rafael E. Coopman
Gago, Xurxo
León Aloys Bravo Ramírez

Modality

Abstract

Subject area

Plant Physiology

Publishing Date

26/09/2022

Country of Publishing

Brasil

Language of Publishing

Inglês

Paper Page

https://www.even3.com.br/anais/cbfv2022_registration/513075-mechanisms-involved-in-the-outlier-response-of-prosopis-tamarugo-to-break-the-trade-off-between-desiccation-toler

ISBN

978-65-5941-830-5

Keywords

desiccation tolerance, metabolomics, photosynthetic capacity, trade-off, osmoprotectants

Summary

A negative correlation or trade-off between allocated resources for primary productivity and stress tolerance is generally observed in nature. In this context, the search for outlier species breaking this trend is an interesting approach to find new physiological or molecular mechanisms for plant breeding purposes. Hypothetically, outlier plants species living under extreme environments present a distinctive arrangement of physiological functions that favor stress tolerance mechanisms without jeopardizing investment allocation into productivity. Here, we explored this trade-off, analyzing twenty-one plant species for desiccation tolerance, and photosynthetic capacity, under the extreme environment of the Atacama Desert, and the Surire Salar in the Chilean Altiplano. Most of the studied species followed the trade-off tendency, however, we did find one outlier species, Prosopis tamarugo. This species presented a high photosynthetic capacity (19.3 µmol CO2 m-2 s-1), and high desiccation tolerance (69.2 % Fv/Fm recovery). To study the mechanisms involved in this atypical response, three species from the Prosopis genus with contrasting responses to the trade-off were studied more deeply. Physiological, photosynthetic pigments quantification, untargeted metabolomics, antioxidant content, and radical scavenging analyses at the leaf level, suggest that the outlier response observed in P. tamarugo is multifactorial. It includes efficient photoprotection, participation of photorespiration as an important alternative electrons sink, and the synthesis of tryptophan derivate metabolites, complex antioxidant, and no-nitrogen osmoprotectant metabolites. All these processes would favor its desiccation stress tolerance under extremely dry environments without compromising its photosynthetic capacity. Funding: This research was funded by the projects: NXR17-0002, and FAPESP-UFRO 2020/07578-1. HAG and DL were funded by ANID National Doctorate Scholarship 21181972 and 21170470, respectively. MMo thanks her Postdoctoral FONDECYT Project, number 379012.

Title of the Event: XVIII Brazilian Congress of Plant Physiology and I Ibero-latinoamerican Congress of Plant Biology
City of the Event: Porto Alegre
Title of the Proceedings of the event: Annals of the Brazilian Congress of Plant Physiology and Ibero-latinamerican Congress of Plant Biology
Name of the Publisher: Even3
Means of Dissemination: Meio Digital

How to cite

BALBOA, Humberto Gajardo et al.. MECHANISMS INVOLVED IN THE OUTLIER RESPONSE OF PROSOPIS TAMARUGO TO BREAK THE TRADE-OFF BETWEEN DESICCATION TOLERANCE AND PHOTOSYNTHETIC CAPACITY.. In: Annals of the Brazilian Congress of Plant Physiology and Ibero-latinamerican Congress of Plant Biology. Anais...Porto Alegre(RS) CEPUCRS, 2022. Available in: https//www.even3.com.br/anais/cbfv2022_registration/513075-MECHANISMS-INVOLVED-IN-THE-OUTLIER-RESPONSE-OF-PROSOPIS-TAMARUGO-TO-BREAK-THE-TRADE-OFF-BETWEEN-DESICCATION-TOLER. Access in: 06/05/2025