Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress
The hydraulic traits of plants, or the efficiency of water transport throughout the plant hydraulic system, could help to anticipate the impact of climate change and improve crop productivity. However, the mechanisms explaining the role of hydraulic traits on plant photosynthesis and thus, plant gro...
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Frontiers Media S.A.
2019-03-01
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Series: | Frontiers in Plant Science |
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Online Access: | https://www.frontiersin.org/article/10.3389/fpls.2019.00291/full |
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Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Virginia Hernandez-Santana Pablo Diaz-Rueda Antonio Diaz-Espejo María D. Raya-Sereno María D. Raya-Sereno Saray Gutiérrez-Gordillo Saray Gutiérrez-Gordillo Antonio Montero Alfonso Perez-Martin Jose M. Colmenero-Flores Celia M. Rodriguez-Dominguez Celia M. Rodriguez-Dominguez |
spellingShingle |
Virginia Hernandez-Santana Pablo Diaz-Rueda Antonio Diaz-Espejo María D. Raya-Sereno María D. Raya-Sereno Saray Gutiérrez-Gordillo Saray Gutiérrez-Gordillo Antonio Montero Alfonso Perez-Martin Jose M. Colmenero-Flores Celia M. Rodriguez-Dominguez Celia M. Rodriguez-Dominguez Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress Frontiers in Plant Science hydraulic allometry leaf hydraulic conductance leaf:sapwood area ratio leaf:root area ratio net photosynthesis rate stomatal conductance |
author_facet |
Virginia Hernandez-Santana Pablo Diaz-Rueda Antonio Diaz-Espejo María D. Raya-Sereno María D. Raya-Sereno Saray Gutiérrez-Gordillo Saray Gutiérrez-Gordillo Antonio Montero Alfonso Perez-Martin Jose M. Colmenero-Flores Celia M. Rodriguez-Dominguez Celia M. Rodriguez-Dominguez |
author_sort |
Virginia Hernandez-Santana |
title |
Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress |
title_short |
Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress |
title_full |
Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress |
title_fullStr |
Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress |
title_full_unstemmed |
Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water Stress |
title_sort |
hydraulic traits emerge as relevant determinants of growth patterns in wild olive genotypes under water stress |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Plant Science |
issn |
1664-462X |
publishDate |
2019-03-01 |
description |
The hydraulic traits of plants, or the efficiency of water transport throughout the plant hydraulic system, could help to anticipate the impact of climate change and improve crop productivity. However, the mechanisms explaining the role of hydraulic traits on plant photosynthesis and thus, plant growth and yield, are just beginning to emerge. We conducted an experiment to identify differences in growth patterns at leaf, root and whole plant level among four wild olive genotypes and to determine whether hydraulic traits may help to explain such differences through their effect on photosynthesis. We estimated the relative growth rate (RGR), and its components, leaf gas exchange and hydraulic traits both at the leaf and whole-plant level in the olive genotypes over a full year. Photosynthetic capacity parameters were also measured. We observed different responses to water stress in the RGRs of the genotypes studied being best explained by changes in the net CO2 assimilation rate (NAR). Further, net photosynthesis, closely related to NAR, was mainly determined by hydraulic traits, both at leaf and whole-plant levels. This was mediated through the effects of hydraulic traits on stomatal conductance. We observed a decrease in leaf area: sapwood area and leaf area: root area ratios in water-stressed plants, which was more evident in the olive genotype Olea europaea subsp. guanchica (GUA8), whose RGR was less affected by water deficit than the other olive genotypes. In addition, at the leaf level, GUA8 water-stressed plants presented a better photosynthetic capacity due to a higher mesophyll conductance to CO2 and a higher foliar N. We conclude that hydraulic allometry adjustments of whole plant and leaf physiological response were well coordinated, buffering the water stress experienced by GUA8 plants. In turn, this explained their higher relative growth rates compared to the rest of the genotypes under water-stress conditions. |
topic |
hydraulic allometry leaf hydraulic conductance leaf:sapwood area ratio leaf:root area ratio net photosynthesis rate stomatal conductance |
url |
https://www.frontiersin.org/article/10.3389/fpls.2019.00291/full |
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doaj-bdb73a5bfdf24491a90dc1a342dd99fe2020-11-25T01:21:29ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2019-03-011010.3389/fpls.2019.00291436968Hydraulic Traits Emerge as Relevant Determinants of Growth Patterns in Wild Olive Genotypes Under Water StressVirginia Hernandez-Santana0Pablo Diaz-Rueda1Antonio Diaz-Espejo2María D. Raya-Sereno3María D. Raya-Sereno4Saray Gutiérrez-Gordillo5Saray Gutiérrez-Gordillo6Antonio Montero7Alfonso Perez-Martin8Jose M. Colmenero-Flores9Celia M. Rodriguez-Dominguez10Celia M. Rodriguez-Dominguez11Irrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainSchool of Agricultural Engineering, CEIGRAM, Universidad Politécnica de Madrid, Madrid, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainCentro “Las Torres-Tomejil”, Instituto Andaluz de Investigación y Formación Agraria y Pesquera, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainIrrigation and Crop Ecophysiology Group, Instituto de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas, Seville, SpainSchool of Biological Sciences, University of Tasmania, Hobart, TAS, AustraliaThe hydraulic traits of plants, or the efficiency of water transport throughout the plant hydraulic system, could help to anticipate the impact of climate change and improve crop productivity. However, the mechanisms explaining the role of hydraulic traits on plant photosynthesis and thus, plant growth and yield, are just beginning to emerge. We conducted an experiment to identify differences in growth patterns at leaf, root and whole plant level among four wild olive genotypes and to determine whether hydraulic traits may help to explain such differences through their effect on photosynthesis. We estimated the relative growth rate (RGR), and its components, leaf gas exchange and hydraulic traits both at the leaf and whole-plant level in the olive genotypes over a full year. Photosynthetic capacity parameters were also measured. We observed different responses to water stress in the RGRs of the genotypes studied being best explained by changes in the net CO2 assimilation rate (NAR). Further, net photosynthesis, closely related to NAR, was mainly determined by hydraulic traits, both at leaf and whole-plant levels. This was mediated through the effects of hydraulic traits on stomatal conductance. We observed a decrease in leaf area: sapwood area and leaf area: root area ratios in water-stressed plants, which was more evident in the olive genotype Olea europaea subsp. guanchica (GUA8), whose RGR was less affected by water deficit than the other olive genotypes. In addition, at the leaf level, GUA8 water-stressed plants presented a better photosynthetic capacity due to a higher mesophyll conductance to CO2 and a higher foliar N. We conclude that hydraulic allometry adjustments of whole plant and leaf physiological response were well coordinated, buffering the water stress experienced by GUA8 plants. In turn, this explained their higher relative growth rates compared to the rest of the genotypes under water-stress conditions.https://www.frontiersin.org/article/10.3389/fpls.2019.00291/fullhydraulic allometryleaf hydraulic conductanceleaf:sapwood area ratioleaf:root area rationet photosynthesis ratestomatal conductance |