Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Anais da Academia Brasileira de Ciências (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200665 |
Resumo: | The effects of copper toxicity on the photosynthetic activities of Avicennia germinans was investigated using two CuSO4 concentrations (0.062 and 0.33 M) added in Hoagland's solution in an aerated hydroponic system. Photosynthesis and chlorophyll fluorescence were measured after 30 h of copper stress. Results obtained in this study show that increasing levels of Cu+2 of 0.062 and 0.33 M Cu+2 resulted in a general reduction of the stomatal conductance (28 and 18%, respectively) and 100% of inhibition of net photosynthesis. Additionally, at these concentrations of Cu+2, reductions of chlorophyll fluorescence parameters were also observed. These changes suggested that the photosynthetic apparatus of Avicennia germinans was the primary target of the Cu+2 action. It is concluded that Cu+2 ions causes a drastic decline in photosynthetic gas exchange and Chlorophyll fluorescence parameters in A. germinans leaves. |
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Anais da Academia Brasileira de Ciências (Online) |
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Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans)Avicennia germinanschlorophyll fluorescencecopperphotosystem IIphotosynthesisThe effects of copper toxicity on the photosynthetic activities of Avicennia germinans was investigated using two CuSO4 concentrations (0.062 and 0.33 M) added in Hoagland's solution in an aerated hydroponic system. Photosynthesis and chlorophyll fluorescence were measured after 30 h of copper stress. Results obtained in this study show that increasing levels of Cu+2 of 0.062 and 0.33 M Cu+2 resulted in a general reduction of the stomatal conductance (28 and 18%, respectively) and 100% of inhibition of net photosynthesis. Additionally, at these concentrations of Cu+2, reductions of chlorophyll fluorescence parameters were also observed. These changes suggested that the photosynthetic apparatus of Avicennia germinans was the primary target of the Cu+2 action. It is concluded that Cu+2 ions causes a drastic decline in photosynthetic gas exchange and Chlorophyll fluorescence parameters in A. germinans leaves.Academia Brasileira de Ciências2013-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200665Anais da Academia Brasileira de Ciências v.85 n.2 2013reponame:Anais da Academia Brasileira de Ciências (Online)instname:Academia Brasileira de Ciências (ABC)instacron:ABC10.1590/S0001-37652013000200013info:eu-repo/semantics/openAccessGONZALEZ-MENDOZA,DANIELGIL,FRANCISCO ESPADAS yESCOBOZA-GARCIA,FERNANDOSANTAMARIA,JORGE M.ZAPATA-PEREZ,OMAReng2013-07-01T00:00:00Zoai:scielo:S0001-37652013000200665Revistahttp://www.scielo.br/aabchttps://old.scielo.br/oai/scielo-oai.php||aabc@abc.org.br1678-26900001-3765opendoar:2013-07-01T00:00Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC)false |
dc.title.none.fl_str_mv |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
title |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
spellingShingle |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) GONZALEZ-MENDOZA,DANIEL Avicennia germinans chlorophyll fluorescence copper photosystem II photosynthesis |
title_short |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
title_full |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
title_fullStr |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
title_full_unstemmed |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
title_sort |
Copper Stress on Photosynthesis of Black Mangle (Avicennia germinans) |
author |
GONZALEZ-MENDOZA,DANIEL |
author_facet |
GONZALEZ-MENDOZA,DANIEL GIL,FRANCISCO ESPADAS y ESCOBOZA-GARCIA,FERNANDO SANTAMARIA,JORGE M. ZAPATA-PEREZ,OMAR |
author_role |
author |
author2 |
GIL,FRANCISCO ESPADAS y ESCOBOZA-GARCIA,FERNANDO SANTAMARIA,JORGE M. ZAPATA-PEREZ,OMAR |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
GONZALEZ-MENDOZA,DANIEL GIL,FRANCISCO ESPADAS y ESCOBOZA-GARCIA,FERNANDO SANTAMARIA,JORGE M. ZAPATA-PEREZ,OMAR |
dc.subject.por.fl_str_mv |
Avicennia germinans chlorophyll fluorescence copper photosystem II photosynthesis |
topic |
Avicennia germinans chlorophyll fluorescence copper photosystem II photosynthesis |
description |
The effects of copper toxicity on the photosynthetic activities of Avicennia germinans was investigated using two CuSO4 concentrations (0.062 and 0.33 M) added in Hoagland's solution in an aerated hydroponic system. Photosynthesis and chlorophyll fluorescence were measured after 30 h of copper stress. Results obtained in this study show that increasing levels of Cu+2 of 0.062 and 0.33 M Cu+2 resulted in a general reduction of the stomatal conductance (28 and 18%, respectively) and 100% of inhibition of net photosynthesis. Additionally, at these concentrations of Cu+2, reductions of chlorophyll fluorescence parameters were also observed. These changes suggested that the photosynthetic apparatus of Avicennia germinans was the primary target of the Cu+2 action. It is concluded that Cu+2 ions causes a drastic decline in photosynthetic gas exchange and Chlorophyll fluorescence parameters in A. germinans leaves. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200665 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200665 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0001-37652013000200013 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
dc.source.none.fl_str_mv |
Anais da Academia Brasileira de Ciências v.85 n.2 2013 reponame:Anais da Academia Brasileira de Ciências (Online) instname:Academia Brasileira de Ciências (ABC) instacron:ABC |
instname_str |
Academia Brasileira de Ciências (ABC) |
instacron_str |
ABC |
institution |
ABC |
reponame_str |
Anais da Academia Brasileira de Ciências (Online) |
collection |
Anais da Academia Brasileira de Ciências (Online) |
repository.name.fl_str_mv |
Anais da Academia Brasileira de Ciências (Online) - Academia Brasileira de Ciências (ABC) |
repository.mail.fl_str_mv |
||aabc@abc.org.br |
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1754302859208294400 |