Physiological responses to flooding and light in two tree species native to the Amazonian floodplains
In Amazonian floodplains, plant survival is determined by adaptations and growth strategies to effectively capture sunlight and endure extended periods of waterlogging. By measuring gas exchange, quantum efficiency of photosystem 2 (PSII), and growth parameters, we investigated the combined effects...
| Autor principal: | Maurenza, Daniel |
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| Outros Autores: | Marenco, R. A., Parolin, Pia, Piedade, Maria Teresa Fernandez |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Aquatic Botany
2020
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https://repositorio.inpa.gov.br/handle/1/18098 |
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oai:repositorio:1-18098 |
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oai:repositorio:1-18098 Physiological responses to flooding and light in two tree species native to the Amazonian floodplains Maurenza, Daniel Marenco, R. A. Parolin, Pia Piedade, Maria Teresa Fernandez Adaptation Adventitious Root Chlorophyll A Decision Analysis Evergreen Tree Floodplain Gas Exchange Growth Rate Light Intensity Morphology Physiological Response Phytomass Seedling Establishment Submergence Survival Amazonia Cecropia Cecropia Latiloba Pouteria In Amazonian floodplains, plant survival is determined by adaptations and growth strategies to effectively capture sunlight and endure extended periods of waterlogging. By measuring gas exchange, quantum efficiency of photosystem 2 (PSII), and growth parameters, we investigated the combined effects of flooding gradients and light on two common evergreen floodplain tree species, the light-tolerant Cecropia latiloba and the shade-tolerant Pouteria glomerata. Individual plants were subjected to different combinations of light and flooding intensity in short-term and long-term experiments. Plants of C. latiloba lost all their leaves under total submersion treatments (plants flooded to apex and with reduced irradiance) and showed highest maximum assimilation rates (A max) in not flooded, high light treatments (6.1μmolCO 2m -2s -1). Individuals of P. glomerata showed similar patterns, with A max increasing from 1.9μmolCO 2m -2s -1 under total flooding to 7.1μmolCO 2m -2s -1 in not flooded, high light treatments. During the long-term flooding experiment, quantum efficiency of PSII (F v/F m) of C. latiloba was not affected by partial flooding. In contrast, in P. glomerata F v/F m decreased to values below 0.73 after 120 days of total flooding. Moreover, total submergence led P. glomerata to reduce significantly light saturation point (LSP), as compared to C. latiloba. For both species morphological adjustments to long-term flooding, such as the production of adventitious roots, resulted in reduced total biomass, relative growth rate (RGR) and leaf mass ratio (LMR). Growth increase in C. latiloba seemed to be more limited by low-light than by flooding. Therefore, the predominant occurrence of this species is in open areas with high light intensities and high levels of inundation. In P. glomerata flooding induced high reductions of growth and photosynthesis, whereas light was not limiting. This species is more abundant in positions where irradiance is reduced and periods of submergence are slightly modest. We could show that the physiological requirements are directly responsible for the flooding (C. latiloba) and shade (P. glomerata) tolerance of the two species, which explains their local distribution in Amazonian floodplain forests. © 2011 Elsevier B.V. 2020-06-15T21:51:37Z 2020-06-15T21:51:37Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/18098 10.1016/j.aquabot.2011.09.003 en Volume 96, Número 1, Pags. 7-13 Restrito Aquatic Botany |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Adaptation Adventitious Root Chlorophyll A Decision Analysis Evergreen Tree Floodplain Gas Exchange Growth Rate Light Intensity Morphology Physiological Response Phytomass Seedling Establishment Submergence Survival Amazonia Cecropia Cecropia Latiloba Pouteria |
| spellingShingle |
Adaptation Adventitious Root Chlorophyll A Decision Analysis Evergreen Tree Floodplain Gas Exchange Growth Rate Light Intensity Morphology Physiological Response Phytomass Seedling Establishment Submergence Survival Amazonia Cecropia Cecropia Latiloba Pouteria Maurenza, Daniel Physiological responses to flooding and light in two tree species native to the Amazonian floodplains |
| topic_facet |
Adaptation Adventitious Root Chlorophyll A Decision Analysis Evergreen Tree Floodplain Gas Exchange Growth Rate Light Intensity Morphology Physiological Response Phytomass Seedling Establishment Submergence Survival Amazonia Cecropia Cecropia Latiloba Pouteria |
| description |
In Amazonian floodplains, plant survival is determined by adaptations and growth strategies to effectively capture sunlight and endure extended periods of waterlogging. By measuring gas exchange, quantum efficiency of photosystem 2 (PSII), and growth parameters, we investigated the combined effects of flooding gradients and light on two common evergreen floodplain tree species, the light-tolerant Cecropia latiloba and the shade-tolerant Pouteria glomerata. Individual plants were subjected to different combinations of light and flooding intensity in short-term and long-term experiments. Plants of C. latiloba lost all their leaves under total submersion treatments (plants flooded to apex and with reduced irradiance) and showed highest maximum assimilation rates (A max) in not flooded, high light treatments (6.1μmolCO 2m -2s -1). Individuals of P. glomerata showed similar patterns, with A max increasing from 1.9μmolCO 2m -2s -1 under total flooding to 7.1μmolCO 2m -2s -1 in not flooded, high light treatments. During the long-term flooding experiment, quantum efficiency of PSII (F v/F m) of C. latiloba was not affected by partial flooding. In contrast, in P. glomerata F v/F m decreased to values below 0.73 after 120 days of total flooding. Moreover, total submergence led P. glomerata to reduce significantly light saturation point (LSP), as compared to C. latiloba. For both species morphological adjustments to long-term flooding, such as the production of adventitious roots, resulted in reduced total biomass, relative growth rate (RGR) and leaf mass ratio (LMR). Growth increase in C. latiloba seemed to be more limited by low-light than by flooding. Therefore, the predominant occurrence of this species is in open areas with high light intensities and high levels of inundation. In P. glomerata flooding induced high reductions of growth and photosynthesis, whereas light was not limiting. This species is more abundant in positions where irradiance is reduced and periods of submergence are slightly modest. We could show that the physiological requirements are directly responsible for the flooding (C. latiloba) and shade (P. glomerata) tolerance of the two species, which explains their local distribution in Amazonian floodplain forests. © 2011 Elsevier B.V. |
| format |
Artigo |
| author |
Maurenza, Daniel |
| author2 |
Marenco, R. A. Parolin, Pia Piedade, Maria Teresa Fernandez |
| author2Str |
Marenco, R. A. Parolin, Pia Piedade, Maria Teresa Fernandez |
| title |
Physiological responses to flooding and light in two tree species native to the Amazonian floodplains |
| title_short |
Physiological responses to flooding and light in two tree species native to the Amazonian floodplains |
| title_full |
Physiological responses to flooding and light in two tree species native to the Amazonian floodplains |
| title_fullStr |
Physiological responses to flooding and light in two tree species native to the Amazonian floodplains |
| title_full_unstemmed |
Physiological responses to flooding and light in two tree species native to the Amazonian floodplains |
| title_sort |
physiological responses to flooding and light in two tree species native to the amazonian floodplains |
| publisher |
Aquatic Botany |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18098 |
| _version_ |
1787145084575154176 |
| score |
11.755432 |