SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY

SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY

ABSTRACT The altitude swamps in northeast Brazil are areas with divergent microclimates from the context that theyare located, their forest formations are disjunctions of the Atlantic Forest, marooned by the ‘Caatinga’vegetation, a condition that makes these remaining areas with high biodiversity. Botanical research in remnants forests of Paraíba state, particularly with regard to the redemption of germplasm, are relevant. The aim of this study was to evaluate the ecophysiology of seeds from native species of the Fabaceae family selected in the CCHSA forest fragment, submitted to thermal stress and monitor their reproductive phenophases. The experiment was conducted at the Seed Laboratory of the CCHSA/UFPB and with the aid of B.O.D germinators, with 8 hours of photoperiod in a randomized experiment design with constant temperatures of 20, 25, 30 and 40°C. The seeds were distributed on a paper towel moistened with distilled water equivalent to three times the weight of the dry paper. Four replicates of 25 seeds were used per treatment. Data of germination and Germination Speed Index (GSI) were submitted to analysis of variance and polynomial regression. The germination of Pterogyne nitens Tul. was affected by the studied temperatures and the temperature range that promoted higher germination percentage between 25 and 40°C. The higher temperature (40°C) markedly increased the germination and vigor of Senegalia tenuifolia L. Britton and Rose. The higher GSI was observed for Enterolobium contortisiliquum (Vell.) with the use of 40°C of temperature. The results can indicate the optimum temperature and range temperature for germination and early seedling development of the species studied in its habitat.

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Main Authors: Medeiros,Robson Luis Silva de, Souza,Vênia Camelo de, Santos,José Nailson Barros, Azeredo,Gilvaneide Alves de, Anjos,Fabiana dos
Format: Digital revista
Language:English
Published: Universidade Federal de Santa Maria 2017
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-50982017000200697
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spelling oai:scielo:S1980-509820170002006972017-08-21SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITYMedeiros,Robson Luis Silva deSouza,Vênia Camelo deSantos,José Nailson BarrosAzeredo,Gilvaneide Alves deAnjos,Fabiana dos native forest seed Atlantic Forest abiotic factors ABSTRACT The altitude swamps in northeast Brazil are areas with divergent microclimates from the context that theyare located, their forest formations are disjunctions of the Atlantic Forest, marooned by the ‘Caatinga’vegetation, a condition that makes these remaining areas with high biodiversity. Botanical research in remnants forests of Paraíba state, particularly with regard to the redemption of germplasm, are relevant. The aim of this study was to evaluate the ecophysiology of seeds from native species of the Fabaceae family selected in the CCHSA forest fragment, submitted to thermal stress and monitor their reproductive phenophases. The experiment was conducted at the Seed Laboratory of the CCHSA/UFPB and with the aid of B.O.D germinators, with 8 hours of photoperiod in a randomized experiment design with constant temperatures of 20, 25, 30 and 40°C. The seeds were distributed on a paper towel moistened with distilled water equivalent to three times the weight of the dry paper. Four replicates of 25 seeds were used per treatment. Data of germination and Germination Speed Index (GSI) were submitted to analysis of variance and polynomial regression. The germination of Pterogyne nitens Tul. was affected by the studied temperatures and the temperature range that promoted higher germination percentage between 25 and 40°C. The higher temperature (40°C) markedly increased the germination and vigor of Senegalia tenuifolia L. Britton and Rose. The higher GSI was observed for Enterolobium contortisiliquum (Vell.) with the use of 40°C of temperature. The results can indicate the optimum temperature and range temperature for germination and early seedling development of the species studied in its habitat.info:eu-repo/semantics/openAccessUniversidade Federal de Santa MariaCiência Florestal v.27 n.2 20172017-06-01info:eu-repo/semantics/reporttext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-50982017000200697en10.5902/1980509827754
institution SCIELO
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country Brasil
countrycode BR
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region America del Sur
libraryname SciELO
language English
format Digital
author Medeiros,Robson Luis Silva de
Souza,Vênia Camelo de
Santos,José Nailson Barros
Azeredo,Gilvaneide Alves de
Anjos,Fabiana dos
spellingShingle Medeiros,Robson Luis Silva de
Souza,Vênia Camelo de
Santos,José Nailson Barros
Azeredo,Gilvaneide Alves de
Anjos,Fabiana dos
SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY
author_facet Medeiros,Robson Luis Silva de
Souza,Vênia Camelo de
Santos,José Nailson Barros
Azeredo,Gilvaneide Alves de
Anjos,Fabiana dos
author_sort Medeiros,Robson Luis Silva de
title SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY
title_short SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY
title_full SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY
title_fullStr SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY
title_full_unstemmed SEEDS ECOPHYSIOLOGY IN AN ALTITUDE MARSH IN PARAÍBA STATE, BRAZIL, AIMING THE CONSERVATION OF THE AUTOCHTHONOUS BIODIVERSITY
title_sort seeds ecophysiology in an altitude marsh in paraíba state, brazil, aiming the conservation of the autochthonous biodiversity
description ABSTRACT The altitude swamps in northeast Brazil are areas with divergent microclimates from the context that theyare located, their forest formations are disjunctions of the Atlantic Forest, marooned by the ‘Caatinga’vegetation, a condition that makes these remaining areas with high biodiversity. Botanical research in remnants forests of Paraíba state, particularly with regard to the redemption of germplasm, are relevant. The aim of this study was to evaluate the ecophysiology of seeds from native species of the Fabaceae family selected in the CCHSA forest fragment, submitted to thermal stress and monitor their reproductive phenophases. The experiment was conducted at the Seed Laboratory of the CCHSA/UFPB and with the aid of B.O.D germinators, with 8 hours of photoperiod in a randomized experiment design with constant temperatures of 20, 25, 30 and 40°C. The seeds were distributed on a paper towel moistened with distilled water equivalent to three times the weight of the dry paper. Four replicates of 25 seeds were used per treatment. Data of germination and Germination Speed Index (GSI) were submitted to analysis of variance and polynomial regression. The germination of Pterogyne nitens Tul. was affected by the studied temperatures and the temperature range that promoted higher germination percentage between 25 and 40°C. The higher temperature (40°C) markedly increased the germination and vigor of Senegalia tenuifolia L. Britton and Rose. The higher GSI was observed for Enterolobium contortisiliquum (Vell.) with the use of 40°C of temperature. The results can indicate the optimum temperature and range temperature for germination and early seedling development of the species studied in its habitat.
publisher Universidade Federal de Santa Maria
publishDate 2017
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-50982017000200697
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