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Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland
This review summarizes the research on physiological responses to flooding of trees in the seasonal black-water wetland of the Mapire River in Venezuela. Inter-annual variability was found during 8 years of sampling, in spite of which a general picture emerged of increased stomatal conductance (g(s)...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2013
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3640197/ https://www.ncbi.nlm.nih.gov/pubmed/23641246 http://dx.doi.org/10.3389/fpls.2013.00106 |
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author | Herrera, A. |
author_facet | Herrera, A. |
author_sort | Herrera, A. |
collection | PubMed |
description | This review summarizes the research on physiological responses to flooding of trees in the seasonal black-water wetland of the Mapire River in Venezuela. Inter-annual variability was found during 8 years of sampling, in spite of which a general picture emerged of increased stomatal conductance (g(s)) and photosynthetic rate (P(N)) during the flooded period to values as high as or higher than in plants in drained wet soil. Models explaining the initial inhibitory responses and the acclimation to flooding are proposed. In the inhibitory phase of flooding, hypoxia generated by flooding causes a decrease in root water absorption and stomatal closure. An increase with flooding in xylem water potential (ψ) suggests that flooding does not cause water deficit. The P(N) decreases due to changes in relative stomatal and non-stomatal limitations to photosynthesis; an increase in the latter is due to reduced chlorophyll and total soluble protein content. Total non-structural carbohydrates (TNC) accumulate in leaves but their content begins to decrease during the acclimatized phase at full flooding, coinciding with the resumption of high g(s) and P(N). The reversal of the diminution in g(s) is associated, in some but not all species, to the growth of adventitious roots. The occurrence of morpho-anatomical and biochemical adaptations which improve oxygen supply would cause the acclimation, including increased water absorption by the roots, increased rubisco and chlorophyll contents and ultimately increased P(N). Therefore, trees would perform as if flooding did not signify a stress to their physiology. |
format | Online Article Text |
id | pubmed-3640197 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-36401972013-05-02 Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland Herrera, A. Front Plant Sci Plant Science This review summarizes the research on physiological responses to flooding of trees in the seasonal black-water wetland of the Mapire River in Venezuela. Inter-annual variability was found during 8 years of sampling, in spite of which a general picture emerged of increased stomatal conductance (g(s)) and photosynthetic rate (P(N)) during the flooded period to values as high as or higher than in plants in drained wet soil. Models explaining the initial inhibitory responses and the acclimation to flooding are proposed. In the inhibitory phase of flooding, hypoxia generated by flooding causes a decrease in root water absorption and stomatal closure. An increase with flooding in xylem water potential (ψ) suggests that flooding does not cause water deficit. The P(N) decreases due to changes in relative stomatal and non-stomatal limitations to photosynthesis; an increase in the latter is due to reduced chlorophyll and total soluble protein content. Total non-structural carbohydrates (TNC) accumulate in leaves but their content begins to decrease during the acclimatized phase at full flooding, coinciding with the resumption of high g(s) and P(N). The reversal of the diminution in g(s) is associated, in some but not all species, to the growth of adventitious roots. The occurrence of morpho-anatomical and biochemical adaptations which improve oxygen supply would cause the acclimation, including increased water absorption by the roots, increased rubisco and chlorophyll contents and ultimately increased P(N). Therefore, trees would perform as if flooding did not signify a stress to their physiology. Frontiers Media S.A. 2013-05-01 /pmc/articles/PMC3640197/ /pubmed/23641246 http://dx.doi.org/10.3389/fpls.2013.00106 Text en Copyright © 2013 Herrera. http://creativecommons.org/licenses/by/3.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc. |
spellingShingle | Plant Science Herrera, A. Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
title | Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
title_full | Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
title_fullStr | Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
title_full_unstemmed | Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
title_short | Responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
title_sort | responses to flooding of plant water relations and leaf gas exchange in tropical tolerant trees of a black-water wetland |
topic | Plant Science |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3640197/ https://www.ncbi.nlm.nih.gov/pubmed/23641246 http://dx.doi.org/10.3389/fpls.2013.00106 |
work_keys_str_mv | AT herreraa responsestofloodingofplantwaterrelationsandleafgasexchangeintropicaltoleranttreesofablackwaterwetland |