Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants

Increasing atmospheric CO(2) concentrations accompanied by abiotic stresses challenge food production worldwide. Elevated CO(2) (e[CO(2)]) affects plant water relations via multiple mechanisms involving abscisic acid (ABA). Here, two tomato (Solanum lycopersicum) genotypes, Ailsa Craig (AC) and its...

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Autores principales: Li, Shenglan, Fang, Liang, Hegelund, Josefine Nymark, Liu, Fulai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8218578/
https://www.ncbi.nlm.nih.gov/pubmed/34168667
http://dx.doi.org/10.3389/fpls.2021.666066
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author Li, Shenglan
Fang, Liang
Hegelund, Josefine Nymark
Liu, Fulai
author_facet Li, Shenglan
Fang, Liang
Hegelund, Josefine Nymark
Liu, Fulai
author_sort Li, Shenglan
collection PubMed
description Increasing atmospheric CO(2) concentrations accompanied by abiotic stresses challenge food production worldwide. Elevated CO(2) (e[CO(2)]) affects plant water relations via multiple mechanisms involving abscisic acid (ABA). Here, two tomato (Solanum lycopersicum) genotypes, Ailsa Craig (AC) and its ABA-deficient mutant (flacca), were used to investigate the responses of plant hydraulic conductance to e[CO(2)] and drought stress. Results showed that e[CO(2)] decreased transpiration rate (E) increased plant water use efficiency only in AC, whereas it increased daily plant water consumption and osmotic adjustment in both genotypes. Compared to growth at ambient [CO(2)], AC leaf and root hydraulic conductance (K(leaf) and K(root)) decreased at e[CO(2)], which coincided with the transcriptional regulations of genes of plasma membrane intrinsic proteins (PIPs) and OPEN STOMATA 1 (OST1), and these effects were attenuated in flacca during soil drying. Severe drought stress could override the effects of e[CO(2)] on plant water relation characteristics. In both genotypes, drought stress resulted in decreased E, K(leaf), and K(root) accompanied by transcriptional responses of PIPs and OST1. However, under conditions combining e[CO(2)] and drought, some PIPs were not responsive to drought in AC, indicating that e[CO(2)] might disturb ABA-mediated drought responses. These results provide some new insights into mechanisms of plant hydraulic response to drought stress in a future CO(2)-enriched environment.
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spelling pubmed-82185782021-06-23 Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants Li, Shenglan Fang, Liang Hegelund, Josefine Nymark Liu, Fulai Front Plant Sci Plant Science Increasing atmospheric CO(2) concentrations accompanied by abiotic stresses challenge food production worldwide. Elevated CO(2) (e[CO(2)]) affects plant water relations via multiple mechanisms involving abscisic acid (ABA). Here, two tomato (Solanum lycopersicum) genotypes, Ailsa Craig (AC) and its ABA-deficient mutant (flacca), were used to investigate the responses of plant hydraulic conductance to e[CO(2)] and drought stress. Results showed that e[CO(2)] decreased transpiration rate (E) increased plant water use efficiency only in AC, whereas it increased daily plant water consumption and osmotic adjustment in both genotypes. Compared to growth at ambient [CO(2)], AC leaf and root hydraulic conductance (K(leaf) and K(root)) decreased at e[CO(2)], which coincided with the transcriptional regulations of genes of plasma membrane intrinsic proteins (PIPs) and OPEN STOMATA 1 (OST1), and these effects were attenuated in flacca during soil drying. Severe drought stress could override the effects of e[CO(2)] on plant water relation characteristics. In both genotypes, drought stress resulted in decreased E, K(leaf), and K(root) accompanied by transcriptional responses of PIPs and OST1. However, under conditions combining e[CO(2)] and drought, some PIPs were not responsive to drought in AC, indicating that e[CO(2)] might disturb ABA-mediated drought responses. These results provide some new insights into mechanisms of plant hydraulic response to drought stress in a future CO(2)-enriched environment. Frontiers Media S.A. 2021-05-28 /pmc/articles/PMC8218578/ /pubmed/34168667 http://dx.doi.org/10.3389/fpls.2021.666066 Text en Copyright © 2021 Li, Fang, Hegelund and Liu. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Li, Shenglan
Fang, Liang
Hegelund, Josefine Nymark
Liu, Fulai
Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants
title Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants
title_full Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants
title_fullStr Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants
title_full_unstemmed Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants
title_short Elevated CO(2) Modulates Plant Hydraulic Conductance Through Regulation of PIPs Under Progressive Soil Drying in Tomato Plants
title_sort elevated co(2) modulates plant hydraulic conductance through regulation of pips under progressive soil drying in tomato plants
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8218578/
https://www.ncbi.nlm.nih.gov/pubmed/34168667
http://dx.doi.org/10.3389/fpls.2021.666066
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