PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/1983-21252015v28n322rc http://hdl.handle.net/11449/160995 |
Resumo: | The maintenance of a plant water status is essential for keeping of its development in environments with limited water availability. Different species have different mechanisms that provide greater ability to survive under drought conditions. The objective of this study was to evaluate physiological parameters changes of the isohydric species Beaucarnea recurvate Lem. under irrigation suspension. The study involved experiments with slow dehydration (SD) performed by withholding water followed by plants rehydration, and with rapid dehydration (RD), where individual leaves were detached and placed to dehydrate in the laboratory bench. The results showed that although of the soil water content (% H2O) reach critical values (12%) in the first days of the irrigation suspension, the plants showed maintenance of the relative water content (congruent to 80%) over the 54-day SD period, when the net photosynthesis (P-N) reached null values. Throughout SD, it was observed that the P-N, stomatal conductance (g(s)), instantaneous carboxylation efficiency, the electrons transport rate, the potential quantum efficiency of PSII and chlorophyll content were reduced. In RD, experiment was observed a high correlation between P-N and g(s). The results suggest that the reduction in photosynthesis was initially caused by a stomatal adjustment that culminated in an imbalance between photochemical energy production and its consumption by biochemical apparatus of photosynthesis. However, after rehydration, all gas exchange parameters were recovered, indicating that the isohydric behavior of this species contributed to the plants did not suffer extensive damage during a prolonged period of irrigation suspension. |
id |
UNSP_c4024ce10bc728aea3d5423adc2d5d30 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/160995 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICITBeaucarnea recurvata Lem.DehydrationGas exchangeWater regulationThe maintenance of a plant water status is essential for keeping of its development in environments with limited water availability. Different species have different mechanisms that provide greater ability to survive under drought conditions. The objective of this study was to evaluate physiological parameters changes of the isohydric species Beaucarnea recurvate Lem. under irrigation suspension. The study involved experiments with slow dehydration (SD) performed by withholding water followed by plants rehydration, and with rapid dehydration (RD), where individual leaves were detached and placed to dehydrate in the laboratory bench. The results showed that although of the soil water content (% H2O) reach critical values (12%) in the first days of the irrigation suspension, the plants showed maintenance of the relative water content (congruent to 80%) over the 54-day SD period, when the net photosynthesis (P-N) reached null values. Throughout SD, it was observed that the P-N, stomatal conductance (g(s)), instantaneous carboxylation efficiency, the electrons transport rate, the potential quantum efficiency of PSII and chlorophyll content were reduced. In RD, experiment was observed a high correlation between P-N and g(s). The results suggest that the reduction in photosynthesis was initially caused by a stomatal adjustment that culminated in an imbalance between photochemical energy production and its consumption by biochemical apparatus of photosynthesis. However, after rehydration, all gas exchange parameters were recovered, indicating that the isohydric behavior of this species contributed to the plants did not suffer extensive damage during a prolonged period of irrigation suspension.Univ Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Bot, Programa Posgrad Biol Vegetal, Rio Claro, SP, BrazilUniv Oeste Paulista UNOESTE, Lab Inteligencia Plantas & Ecofisiol Ulrich Lutt, Presidente Prudente, SP, BrazilUniv Estadual Paulista Julio de Mesquita Filho UN, Inst Biociencias, Dept Bot, Programa Posgrad Biol Vegetal, Rio Claro, SP, BrazilUniv Fed Rural Semi-arido-ufersaUniversidade Estadual Paulista (Unesp)Univ Oeste Paulista UNOESTEBertolli, Suzana Chiari [UNESP]Souza, Juliano deSouza, Gustavo Maia2018-11-26T16:18:44Z2018-11-26T16:18:44Z2015-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article196-205application/pdfhttp://dx.doi.org/10.1590/1983-21252015v28n322rcRevista Caatinga. Mossoro: Univ Fed Rural Semi-arido-ufersa, v. 28, n. 3, p. 196-205, 2015.0100-316Xhttp://hdl.handle.net/11449/16099510.1590/1983-21252015v28n322rcS1983-21252015000300196WOS:000365406700022S1983-21252015000300196.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Caatingainfo:eu-repo/semantics/openAccess2024-01-17T06:30:53Zoai:repositorio.unesp.br:11449/160995Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:18:44.642002Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
title |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
spellingShingle |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT Bertolli, Suzana Chiari [UNESP] Beaucarnea recurvata Lem. Dehydration Gas exchange Water regulation |
title_short |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
title_full |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
title_fullStr |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
title_full_unstemmed |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
title_sort |
PHOTOSYNTHETIC CHARACTERIZATION OF THE ISOHIDRIC SPECIES PONYTAIL PALM UNDER WATER DEFICIT |
author |
Bertolli, Suzana Chiari [UNESP] |
author_facet |
Bertolli, Suzana Chiari [UNESP] Souza, Juliano de Souza, Gustavo Maia |
author_role |
author |
author2 |
Souza, Juliano de Souza, Gustavo Maia |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Univ Oeste Paulista UNOESTE |
dc.contributor.author.fl_str_mv |
Bertolli, Suzana Chiari [UNESP] Souza, Juliano de Souza, Gustavo Maia |
dc.subject.por.fl_str_mv |
Beaucarnea recurvata Lem. Dehydration Gas exchange Water regulation |
topic |
Beaucarnea recurvata Lem. Dehydration Gas exchange Water regulation |
description |
The maintenance of a plant water status is essential for keeping of its development in environments with limited water availability. Different species have different mechanisms that provide greater ability to survive under drought conditions. The objective of this study was to evaluate physiological parameters changes of the isohydric species Beaucarnea recurvate Lem. under irrigation suspension. The study involved experiments with slow dehydration (SD) performed by withholding water followed by plants rehydration, and with rapid dehydration (RD), where individual leaves were detached and placed to dehydrate in the laboratory bench. The results showed that although of the soil water content (% H2O) reach critical values (12%) in the first days of the irrigation suspension, the plants showed maintenance of the relative water content (congruent to 80%) over the 54-day SD period, when the net photosynthesis (P-N) reached null values. Throughout SD, it was observed that the P-N, stomatal conductance (g(s)), instantaneous carboxylation efficiency, the electrons transport rate, the potential quantum efficiency of PSII and chlorophyll content were reduced. In RD, experiment was observed a high correlation between P-N and g(s). The results suggest that the reduction in photosynthesis was initially caused by a stomatal adjustment that culminated in an imbalance between photochemical energy production and its consumption by biochemical apparatus of photosynthesis. However, after rehydration, all gas exchange parameters were recovered, indicating that the isohydric behavior of this species contributed to the plants did not suffer extensive damage during a prolonged period of irrigation suspension. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-01-01 2018-11-26T16:18:44Z 2018-11-26T16:18:44Z |
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/10.1590/1983-21252015v28n322rc Revista Caatinga. Mossoro: Univ Fed Rural Semi-arido-ufersa, v. 28, n. 3, p. 196-205, 2015. 0100-316X http://hdl.handle.net/11449/160995 10.1590/1983-21252015v28n322rc S1983-21252015000300196 WOS:000365406700022 S1983-21252015000300196.pdf |
url |
http://dx.doi.org/10.1590/1983-21252015v28n322rc http://hdl.handle.net/11449/160995 |
identifier_str_mv |
Revista Caatinga. Mossoro: Univ Fed Rural Semi-arido-ufersa, v. 28, n. 3, p. 196-205, 2015. 0100-316X 10.1590/1983-21252015v28n322rc S1983-21252015000300196 WOS:000365406700022 S1983-21252015000300196.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Caatinga |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
196-205 application/pdf |
dc.publisher.none.fl_str_mv |
Univ Fed Rural Semi-arido-ufersa |
publisher.none.fl_str_mv |
Univ Fed Rural Semi-arido-ufersa |
dc.source.none.fl_str_mv |
Web of Science 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 |
|
_version_ |
1808129506709340160 |