Registro Completo |
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
03/11/2021 |
Data da última atualização: |
03/11/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
NASCIMENTO, J. P. B.; DANTAS, B. F.; MEIADO, M. V. |
Afiliação: |
JOANA PAULA BISPO NASCIMENTO; BARBARA FRANCA DANTAS, CPATSA; MARCOS VINICIUS MEIADO. |
Título: |
Hydropriming changes temperature thresholds for seed germination of tree species from the Caatinga, a Brazilian tropical dry forest. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Journal of Seed Science, v. 43, e202143004, 2021. |
DOI: |
https://doi.org/10.1590/2317-1545v43238649 |
Idioma: |
Inglês |
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. |
Palavras-Chave: |
Especie arborea; Estresse térmico; Hidrocondicionamento; Modelagem; Planta da Caatinga; Tolerância. |
Thesagro: |
Caatinga; Semente; Temperatura. |
Thesaurus Nal: |
Anadenanthera colubrina; Dry forests; Pityrocarpa moniliformis. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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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Registro original: |
Embrapa Semiárido (CPATSA) |
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