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Distinct responses of growth and respiration to growth temperatures in two mangrove species
BACKGROUND AND AIMS: Mangrove plants are mostly found in tropical and sub-tropical tidal flats, and their limited distribution may be related to their responses to growth temperatures. However, the mechanisms underlying these responses have not been clarified. Here, we measured the dependencies of t...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8752395/ https://www.ncbi.nlm.nih.gov/pubmed/34508635 http://dx.doi.org/10.1093/aob/mcab117 |
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author | Inoue, Tomomi Akaji, Yasuaki Noguchi, Ko |
author_facet | Inoue, Tomomi Akaji, Yasuaki Noguchi, Ko |
author_sort | Inoue, Tomomi |
collection | PubMed |
description | BACKGROUND AND AIMS: Mangrove plants are mostly found in tropical and sub-tropical tidal flats, and their limited distribution may be related to their responses to growth temperatures. However, the mechanisms underlying these responses have not been clarified. Here, we measured the dependencies of the growth parameters and respiration rates of leaves and roots on growth temperatures in typical mangrove species. METHODS: We grew two typical species of Indo-Pacific mangroves, Bruguiera gymnorrhiza and Rhizophora stylosa, at four different temperatures (15, 20, 25 and 30 °C) by irrigating with fresh water containing nutrients, and we measured growth parameters, chemical composition, and leaf and root O(2) respiration rates. We then estimated the construction costs of leaves and roots and the respiration rates required for maintenance and growth. KEY RESULTS: The relative growth rates of both species increased with growth temperature due to changes in physiological parameters such as net assimilation rate and respiration rate rather than to changes in structural parameters such as leaf area ratio. Both species required a threshold temperature for growth (12.2 °C in B. gymnorrhiza and 18.1 °C in R. stylosa). At the low growth temperature, root nitrogen uptake rate was lower in R. stylosa than in B. gymnorrhiza, leading to a slower growth rate in R. stylosa. This indicates that R. stylosa is more sensitive than B. gymnorrhiza to low temperature. CONCLUSIONS: Our results suggest that the mangrove species require a certain warm temperature to ensure respiration rates sufficient for maintenance and growth, particularly in roots. The underground temperature probably limits their growth under the low-temperature condition. The lower sensitivity of B. gymnorrhiza to low temperature shows its potential to adapt to a wider habitat temperature range than R. stylosa. These growth and respiratory features may explain the distribution patterns of the two mangrove species. |
format | Online Article Text |
id | pubmed-8752395 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-87523952022-01-12 Distinct responses of growth and respiration to growth temperatures in two mangrove species Inoue, Tomomi Akaji, Yasuaki Noguchi, Ko Ann Bot Original Articles BACKGROUND AND AIMS: Mangrove plants are mostly found in tropical and sub-tropical tidal flats, and their limited distribution may be related to their responses to growth temperatures. However, the mechanisms underlying these responses have not been clarified. Here, we measured the dependencies of the growth parameters and respiration rates of leaves and roots on growth temperatures in typical mangrove species. METHODS: We grew two typical species of Indo-Pacific mangroves, Bruguiera gymnorrhiza and Rhizophora stylosa, at four different temperatures (15, 20, 25 and 30 °C) by irrigating with fresh water containing nutrients, and we measured growth parameters, chemical composition, and leaf and root O(2) respiration rates. We then estimated the construction costs of leaves and roots and the respiration rates required for maintenance and growth. KEY RESULTS: The relative growth rates of both species increased with growth temperature due to changes in physiological parameters such as net assimilation rate and respiration rate rather than to changes in structural parameters such as leaf area ratio. Both species required a threshold temperature for growth (12.2 °C in B. gymnorrhiza and 18.1 °C in R. stylosa). At the low growth temperature, root nitrogen uptake rate was lower in R. stylosa than in B. gymnorrhiza, leading to a slower growth rate in R. stylosa. This indicates that R. stylosa is more sensitive than B. gymnorrhiza to low temperature. CONCLUSIONS: Our results suggest that the mangrove species require a certain warm temperature to ensure respiration rates sufficient for maintenance and growth, particularly in roots. The underground temperature probably limits their growth under the low-temperature condition. The lower sensitivity of B. gymnorrhiza to low temperature shows its potential to adapt to a wider habitat temperature range than R. stylosa. These growth and respiratory features may explain the distribution patterns of the two mangrove species. Oxford University Press 2021-09-11 /pmc/articles/PMC8752395/ /pubmed/34508635 http://dx.doi.org/10.1093/aob/mcab117 Text en © The Author(s) 2021. Published by Oxford University Press on behalf of the Annals of Botany Company. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Articles Inoue, Tomomi Akaji, Yasuaki Noguchi, Ko Distinct responses of growth and respiration to growth temperatures in two mangrove species |
title | Distinct responses of growth and respiration to growth temperatures in two mangrove species |
title_full | Distinct responses of growth and respiration to growth temperatures in two mangrove species |
title_fullStr | Distinct responses of growth and respiration to growth temperatures in two mangrove species |
title_full_unstemmed | Distinct responses of growth and respiration to growth temperatures in two mangrove species |
title_short | Distinct responses of growth and respiration to growth temperatures in two mangrove species |
title_sort | distinct responses of growth and respiration to growth temperatures in two mangrove species |
topic | Original Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8752395/ https://www.ncbi.nlm.nih.gov/pubmed/34508635 http://dx.doi.org/10.1093/aob/mcab117 |
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