Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants
The Brazil nut shows the ability to establish itself in contrasting irradiance conditions. However, physiological strategies with respect to acclimatization to different irradiance still remain unknown. Here we investigated the leaf traits variations related to photosynthetic plasticity of Bertholle...
| Autor principal: | Souza Lopes, Jussara de |
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| Outros Autores: | Costa, Karen Cristina Pires da, Fernandes, Vinícius Souza, Gonçalves, José Francisco Carvalho de |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Flora: Morphology, Distribution, Functional Ecology of Plants
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/15501 |
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oai:repositorio:1-15501 |
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oai:repositorio:1-15501 Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants Souza Lopes, Jussara de Costa, Karen Cristina Pires da Fernandes, Vinícius Souza Gonçalves, José Francisco Carvalho de Acclimation Carbohydrate Forest Ecosystem Functional Role Gas Exchange Growth Response Irradiance Light Effect Nut Phenotypic Plasticity Photochemistry Photosynthesis Plantation Brasil Bertholletia Excelsa The Brazil nut shows the ability to establish itself in contrasting irradiance conditions. However, physiological strategies with respect to acclimatization to different irradiance still remain unknown. Here we investigated the leaf traits variations related to photosynthetic plasticity of Bertholletia excelsa. In this study, B. excelsa saplings were acclimated during 90 days (PPFD = 30 μmol m−2 s-1) and after the acclimatization, the saplings were subjected to two irradiance conditions: planting in full sun (100% PPFD) and planting in forests (1.5% PPFD). Following this, the specific leaf mass (SLM), gas exchange, maximum yield of photochemistry (FV/FM), chlorophyll and carbohydrate contents were evaluated. Net photosynthesis per unit area (Pn) of saplings in full sun was 2 times greater than in shade and photosynthesis in full sun was positively related to stomatal condutance (gs), dark respiration (Rd), carbohydrates and SLM. On the other hand, in shade, we observed an increase in the apparent quantum yield (α) and a reduction of SLM. Although B. excelsa reduced FV/FM by 30% in full sun, after 7 days it was able to recover from stress by the increase in irradiance. The traits that most contributed to explaining the photosynthetic plasticity were SLM (8.7%), FV/FM (7.7%), Rd (5.9%), gs (5.3%) and sugar (5.2%). Therefore, the fast recovery of photosynthesis during light stress and adjustments of morpho-functional traits in leaves to irradiance in B. excelsa are strong candidates to explain why this species establishes both in environments with low and high light availability. © 2019 2020-05-14T16:04:20Z 2020-05-14T16:04:20Z 2019 Artigo https://repositorio.inpa.gov.br/handle/1/15501 10.1016/j.flora.2019.151446 en Volume 258 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf Flora: Morphology, Distribution, Functional Ecology of Plants |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Acclimation Carbohydrate Forest Ecosystem Functional Role Gas Exchange Growth Response Irradiance Light Effect Nut Phenotypic Plasticity Photochemistry Photosynthesis Plantation Brasil Bertholletia Excelsa |
| spellingShingle |
Acclimation Carbohydrate Forest Ecosystem Functional Role Gas Exchange Growth Response Irradiance Light Effect Nut Phenotypic Plasticity Photochemistry Photosynthesis Plantation Brasil Bertholletia Excelsa Souza Lopes, Jussara de Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants |
| topic_facet |
Acclimation Carbohydrate Forest Ecosystem Functional Role Gas Exchange Growth Response Irradiance Light Effect Nut Phenotypic Plasticity Photochemistry Photosynthesis Plantation Brasil Bertholletia Excelsa |
| description |
The Brazil nut shows the ability to establish itself in contrasting irradiance conditions. However, physiological strategies with respect to acclimatization to different irradiance still remain unknown. Here we investigated the leaf traits variations related to photosynthetic plasticity of Bertholletia excelsa. In this study, B. excelsa saplings were acclimated during 90 days (PPFD = 30 μmol m−2 s-1) and after the acclimatization, the saplings were subjected to two irradiance conditions: planting in full sun (100% PPFD) and planting in forests (1.5% PPFD). Following this, the specific leaf mass (SLM), gas exchange, maximum yield of photochemistry (FV/FM), chlorophyll and carbohydrate contents were evaluated. Net photosynthesis per unit area (Pn) of saplings in full sun was 2 times greater than in shade and photosynthesis in full sun was positively related to stomatal condutance (gs), dark respiration (Rd), carbohydrates and SLM. On the other hand, in shade, we observed an increase in the apparent quantum yield (α) and a reduction of SLM. Although B. excelsa reduced FV/FM by 30% in full sun, after 7 days it was able to recover from stress by the increase in irradiance. The traits that most contributed to explaining the photosynthetic plasticity were SLM (8.7%), FV/FM (7.7%), Rd (5.9%), gs (5.3%) and sugar (5.2%). Therefore, the fast recovery of photosynthesis during light stress and adjustments of morpho-functional traits in leaves to irradiance in B. excelsa are strong candidates to explain why this species establishes both in environments with low and high light availability. © 2019 |
| format |
Artigo |
| author |
Souza Lopes, Jussara de |
| author2 |
Costa, Karen Cristina Pires da Fernandes, Vinícius Souza Gonçalves, José Francisco Carvalho de |
| author2Str |
Costa, Karen Cristina Pires da Fernandes, Vinícius Souza Gonçalves, José Francisco Carvalho de |
| title |
Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants |
| title_short |
Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants |
| title_full |
Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants |
| title_fullStr |
Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants |
| title_full_unstemmed |
Functional traits associated to photosynthetic plasticity of young Brazil nut (Bertholletia excelsa) plants |
| title_sort |
functional traits associated to photosynthetic plasticity of young brazil nut (bertholletia excelsa) plants |
| publisher |
Flora: Morphology, Distribution, Functional Ecology of Plants |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/15501 |
| _version_ |
1787144885405483008 |
| score |
11.755432 |