Hydropriming changes temperature thresholds for seed germination of tree species from the Caatinga, a Brazilian tropical dry forest.

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dc.contributorJOANA PAULA BISPO NASCIMENTO; BARBARA FRANCA DANTAS, CPATSA; MARCOS VINICIUS MEIADO.
dc.creatorNASCIMENTO, J. P. B.
dc.creatorDANTAS, B. F.
dc.creatorMEIADO, M. V.
dc.date2021-11-04T02:08:18Z
dc.date2021-11-04T02:08:18Z
dc.date2021-11-03
dc.date2021
dc.date.accessioned2026-07-07T05:56:43Z
dc.descriptionThis 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.
dc.identifierJournal of Seed Science, v. 43, e202143004, 2021.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1135758
dc.identifierhttps://doi.org/10.1590/2317-1545v43238649
dc.identifier.urihttp://hdl.handle.net/123456789/503096
dc.languageeng
dc.rightsopenAccess
dc.subjectTolerância
dc.subjectEstresse térmico
dc.subjectModelagem
dc.subjectPlanta da Caatinga
dc.subjectEspecie arborea
dc.subjectHidrocondicionamento
dc.subjectSemente
dc.subjectCaatinga
dc.subjectTemperatura
dc.subjectDry forests
dc.subjectAnadenanthera colubrina
dc.subjectPityrocarpa moniliformis
dc.titleHydropriming changes temperature thresholds for seed germination of tree species from the Caatinga, a Brazilian tropical dry forest.
dc.typeArtigo de periódico

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