Photoacclimation in three species of freshwater red algae
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/s1677-04202007000100003 http://hdl.handle.net/11449/69474 |
Resumo: | Three freshwater Rhodophyta species (Audouinella eugenea, A. hermannii and Compsopogon coeruleus) were tested as to their responses (photosynthesis, growth and pigment concentration) to two irradiances (low light, LL, 65 μmol m -2 s-1 and high light, HL, 300 μmol m-2 s-1) and two periods (short time, ST, 4 d, and long time, LT, 28 d). Higher growth rates were consistently observed at LL but significant differences were observed only for A. hermannii. Higher values of photoinhibition at LL were found for the three species, which is consistent with the dynamic photoinhibition as a reversible photoprotective mechanism against high irradiance. Light-induced decreases of effective quantum yield (EQY) were observed in the three species consisting of pronounced decreases from LL to HL. Rapid increases of non-photochemical quenching (NPQ) were observed mainly at LL, indicating energy dissipation by reaction centers. Results revealed distinct photoacclimation strategies to deal with high irradiances: the two Audouinella species had only characteristics of shade-adapted algae: acclimation by changes of size of photosy stem units (PSU) under LT and by PSU number under ST; higher values of the photoinhibition parameter (β) and NPQ, and lower values of EQY at LL; higher recovery capacity of potential quantum yield (PQY) at LL and under ST; highly significant positive correlation of electron transport rate (ETR) with NPQ. In addition, C. coeruleus mixed some characteristics of sun-adapted algae: acclimation by changes of PSU number under LT and by PSU size under ST; higher recovery capacity of EQY than the other two species; weak or no correlation of ETR with NPQ. Thus, these characteristics indicate that C. coeruleus cope with high irradiances more efficiently than the Audouinella species. |
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Photoacclimation in three species of freshwater red algaeChlorophyll fluorescenceGrowthIrradiancePhotosynthesisPigmentRed algaealgaeAudouinellaAudouinella hermanniiCompsopogon caeruleusRhodophytaThree freshwater Rhodophyta species (Audouinella eugenea, A. hermannii and Compsopogon coeruleus) were tested as to their responses (photosynthesis, growth and pigment concentration) to two irradiances (low light, LL, 65 μmol m -2 s-1 and high light, HL, 300 μmol m-2 s-1) and two periods (short time, ST, 4 d, and long time, LT, 28 d). Higher growth rates were consistently observed at LL but significant differences were observed only for A. hermannii. Higher values of photoinhibition at LL were found for the three species, which is consistent with the dynamic photoinhibition as a reversible photoprotective mechanism against high irradiance. Light-induced decreases of effective quantum yield (EQY) were observed in the three species consisting of pronounced decreases from LL to HL. Rapid increases of non-photochemical quenching (NPQ) were observed mainly at LL, indicating energy dissipation by reaction centers. Results revealed distinct photoacclimation strategies to deal with high irradiances: the two Audouinella species had only characteristics of shade-adapted algae: acclimation by changes of size of photosy stem units (PSU) under LT and by PSU number under ST; higher values of the photoinhibition parameter (β) and NPQ, and lower values of EQY at LL; higher recovery capacity of potential quantum yield (PQY) at LL and under ST; highly significant positive correlation of electron transport rate (ETR) with NPQ. In addition, C. coeruleus mixed some characteristics of sun-adapted algae: acclimation by changes of PSU number under LT and by PSU size under ST; higher recovery capacity of EQY than the other two species; weak or no correlation of ETR with NPQ. Thus, these characteristics indicate that C. coeruleus cope with high irradiances more efficiently than the Audouinella species.Zoology and Botany Department Säo Paulo State University, Rua Cristoväo Colombo, 2265, 15054-000 Säo José do Rio Preto, SPUniversidade Estadual Paulista (Unesp)Bautista, Anna I. N.Necchi Júnior, Orlando2014-05-27T11:22:22Z2014-05-27T11:22:22Z2007-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article23-34application/pdfhttp://dx.doi.org/10.1590/s1677-04202007000100003Brazilian Journal of Plant Physiology, v. 19, n. 1, p. 23-34, 2007.1677-04201677-9452http://hdl.handle.net/11449/6947410.1590/s1677-04202007000100003S1677-042020070001000032-s2.0-463490846302-s2.0-46349084630.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Plant Physiology0,123info:eu-repo/semantics/openAccess2023-10-29T06:09:36Zoai:repositorio.unesp.br:11449/69474Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:22:37.763461Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Photoacclimation in three species of freshwater red algae |
title |
Photoacclimation in three species of freshwater red algae |
spellingShingle |
Photoacclimation in three species of freshwater red algae Bautista, Anna I. N. Chlorophyll fluorescence Growth Irradiance Photosynthesis Pigment Red algae algae Audouinella Audouinella hermannii Compsopogon caeruleus Rhodophyta |
title_short |
Photoacclimation in three species of freshwater red algae |
title_full |
Photoacclimation in three species of freshwater red algae |
title_fullStr |
Photoacclimation in three species of freshwater red algae |
title_full_unstemmed |
Photoacclimation in three species of freshwater red algae |
title_sort |
Photoacclimation in three species of freshwater red algae |
author |
Bautista, Anna I. N. |
author_facet |
Bautista, Anna I. N. Necchi Júnior, Orlando |
author_role |
author |
author2 |
Necchi Júnior, Orlando |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Bautista, Anna I. N. Necchi Júnior, Orlando |
dc.subject.por.fl_str_mv |
Chlorophyll fluorescence Growth Irradiance Photosynthesis Pigment Red algae algae Audouinella Audouinella hermannii Compsopogon caeruleus Rhodophyta |
topic |
Chlorophyll fluorescence Growth Irradiance Photosynthesis Pigment Red algae algae Audouinella Audouinella hermannii Compsopogon caeruleus Rhodophyta |
description |
Three freshwater Rhodophyta species (Audouinella eugenea, A. hermannii and Compsopogon coeruleus) were tested as to their responses (photosynthesis, growth and pigment concentration) to two irradiances (low light, LL, 65 μmol m -2 s-1 and high light, HL, 300 μmol m-2 s-1) and two periods (short time, ST, 4 d, and long time, LT, 28 d). Higher growth rates were consistently observed at LL but significant differences were observed only for A. hermannii. Higher values of photoinhibition at LL were found for the three species, which is consistent with the dynamic photoinhibition as a reversible photoprotective mechanism against high irradiance. Light-induced decreases of effective quantum yield (EQY) were observed in the three species consisting of pronounced decreases from LL to HL. Rapid increases of non-photochemical quenching (NPQ) were observed mainly at LL, indicating energy dissipation by reaction centers. Results revealed distinct photoacclimation strategies to deal with high irradiances: the two Audouinella species had only characteristics of shade-adapted algae: acclimation by changes of size of photosy stem units (PSU) under LT and by PSU number under ST; higher values of the photoinhibition parameter (β) and NPQ, and lower values of EQY at LL; higher recovery capacity of potential quantum yield (PQY) at LL and under ST; highly significant positive correlation of electron transport rate (ETR) with NPQ. In addition, C. coeruleus mixed some characteristics of sun-adapted algae: acclimation by changes of PSU number under LT and by PSU size under ST; higher recovery capacity of EQY than the other two species; weak or no correlation of ETR with NPQ. Thus, these characteristics indicate that C. coeruleus cope with high irradiances more efficiently than the Audouinella species. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-01-01 2014-05-27T11:22:22Z 2014-05-27T11:22:22Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/s1677-04202007000100003 Brazilian Journal of Plant Physiology, v. 19, n. 1, p. 23-34, 2007. 1677-0420 1677-9452 http://hdl.handle.net/11449/69474 10.1590/s1677-04202007000100003 S1677-04202007000100003 2-s2.0-46349084630 2-s2.0-46349084630.pdf |
url |
http://dx.doi.org/10.1590/s1677-04202007000100003 http://hdl.handle.net/11449/69474 |
identifier_str_mv |
Brazilian Journal of Plant Physiology, v. 19, n. 1, p. 23-34, 2007. 1677-0420 1677-9452 10.1590/s1677-04202007000100003 S1677-04202007000100003 2-s2.0-46349084630 2-s2.0-46349084630.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Plant Physiology 0,123 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
23-34 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808128640286720000 |