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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
03/11/2021 |
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Data da última atualização: |
03/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NASCIMENTO, J. P. B.; DANTAS, B. F.; MEIADO, M. V. |
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Afiliação: |
JOANA PAULA BISPO NASCIMENTO; BARBARA FRANCA DANTAS, CPATSA; MARCOS VINICIUS MEIADO. |
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Título: |
Hydropriming changes temperature thresholds for seed germination of tree species from the Caatinga, a Brazilian tropical dry forest. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Seed Science, v. 43, e202143004, 2021. |
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DOI: |
https://doi.org/10.1590/2317-1545v43238649 |
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Idioma: |
Inglês |
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Conteúdo: |
This study evaluates the effects of hydration and dehydration cycles (HD cycles) on seed germination of four Caatinga tree species (Anadenanthera colubrina var. cebil, Enterolobium contortisiliquum, Pityrocarpa moniliformis and Pterogyne nitens) subjected to different temperatures and determine the thermal upper and lower limits of germination. For this, seeds were subjected to 0, 1, 2 and 3 HD cycles and set to germinate at temperatures of 5, 10, 15, 25, 35, 40 and 45 °C. Germinability and t50 were calculated and the differences of these parameters were compared by two-way ANOVA. In addition, germination rate (GR = 1/t50), as well as ceiling (Tc), optimum (To) and base (Tb) temperatures were calculated to estimate the limits below or above which the seeds fail to germinate. We observed that the more HD cycles, the better the seed responds, especially at extreme temperatures. Seeds of all studied species showed To between 25 and 35 °C, Tb < 10 °C, and Tc > 40 °C. The slope of regression curves for germination rate showed that submitting seeds to HD cycles expands its thermal tolerance range, revealing that this seed pre-treatment can be efficient for species as it increases their tolerance to thermal stress. |
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Palavras-Chave: |
Especie arborea; Estresse térmico; Hidrocondicionamento; Modelagem; Planta da Caatinga; Tolerância. |
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Thesagro: |
Caatinga; Semente; Temperatura. |
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Thesaurus Nal: |
Anadenanthera colubrina; Dry forests; Pityrocarpa moniliformis. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/227385/1/Hydropriming-changes-temperature-2021.pdf
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Marc: |
LEADER 02172naa a2200301 a 4500
001 2135758
005 2021-11-03
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/2317-1545v43238649$2DOI
100 1 $aNASCIMENTO, J. P. B.
245 $aHydropriming changes temperature thresholds for seed germination of tree species from the Caatinga, a Brazilian tropical dry forest.$h[electronic resource]
260 $c2021
520 $aThis study evaluates the effects of hydration and dehydration cycles (HD cycles) on seed germination of four Caatinga tree species (Anadenanthera colubrina var. cebil, Enterolobium contortisiliquum, Pityrocarpa moniliformis and Pterogyne nitens) subjected to different temperatures and determine the thermal upper and lower limits of germination. For this, seeds were subjected to 0, 1, 2 and 3 HD cycles and set to germinate at temperatures of 5, 10, 15, 25, 35, 40 and 45 °C. Germinability and t50 were calculated and the differences of these parameters were compared by two-way ANOVA. In addition, germination rate (GR = 1/t50), as well as ceiling (Tc), optimum (To) and base (Tb) temperatures were calculated to estimate the limits below or above which the seeds fail to germinate. We observed that the more HD cycles, the better the seed responds, especially at extreme temperatures. Seeds of all studied species showed To between 25 and 35 °C, Tb < 10 °C, and Tc > 40 °C. The slope of regression curves for germination rate showed that submitting seeds to HD cycles expands its thermal tolerance range, revealing that this seed pre-treatment can be efficient for species as it increases their tolerance to thermal stress.
650 $aAnadenanthera colubrina
650 $aDry forests
650 $aPityrocarpa moniliformis
650 $aCaatinga
650 $aSemente
650 $aTemperatura
653 $aEspecie arborea
653 $aEstresse térmico
653 $aHidrocondicionamento
653 $aModelagem
653 $aPlanta da Caatinga
653 $aTolerância
700 1 $aDANTAS, B. F.
700 1 $aMEIADO, M. V.
773 $tJournal of Seed Science$gv. 43, e202143004, 2021.
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Embrapa Semiárido (CPATSA) |
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