2021
DOI: 10.1590/2317-1545v43238649
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Hydropriming changes temperature thresholds for seed germination of tree species from the Caatinga, a Brazilian tropical dry forest

Abstract: 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… Show more

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Cited by 11 publications
(5 citation statements)
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“…In this sense, plants have developed adaptive strategies to guarantee seed germination and seedling establishment in the field, aiming at the maintenance of their populations (Meiado et al, 2012). Due to the environmental conditions imposed on dispersed seeds, which allow them to naturally undergo discontinuous hydration and change their germination responses, an acquisition of tolerance to water deficit is expected in response to HD cycles (Lima & Meiado, 2018a; 2018b; Nascimento et al, 2021).…”
Section: Discussionmentioning
confidence: 99%
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“…In this sense, plants have developed adaptive strategies to guarantee seed germination and seedling establishment in the field, aiming at the maintenance of their populations (Meiado et al, 2012). Due to the environmental conditions imposed on dispersed seeds, which allow them to naturally undergo discontinuous hydration and change their germination responses, an acquisition of tolerance to water deficit is expected in response to HD cycles (Lima & Meiado, 2018a; 2018b; Nascimento et al, 2021).…”
Section: Discussionmentioning
confidence: 99%
“…HD cycles have positive effects on germination parameters, such as increased germinability and decreased germination time (Alvarado-López et al, 2014; Nascimento et al, 2021). Thus, some species may show improvements during germination after discontinuous hydration, as observed in seeds from different populations of Pilosocereus catingicola (Gürke) Byles & G.D. Rowley subsp.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…The physiological changes that occur during hydration in the imbibition process are conserved during dehydration periods and, as a HD cycles product, seed hydration memory is expressed and confers ecological implications for the species (Dubrovisky, 1996). Seed hydration memory is related to differential proteins expression (López-Urrutia et al 2013) and provides advantages such as, for example, germination percentage increased, average germination time reduction and tolerance acquisition to abiotic stresses, such as water de cit and salinity (Lima and Meiado 2017;Lima et al 2018;Nascimento et al 2021). This greater tolerance interferes in species population dynamics that inhabit ecosystems with water limitations in certain seasons (Nascimento et al 2021).…”
Section: Introductionmentioning
confidence: 99%
“…Seed hydration memory is related to differential proteins expression (López-Urrutia et al 2013) and provides advantages such as, for example, germination percentage increased, average germination time reduction and tolerance acquisition to abiotic stresses, such as water de cit and salinity (Lima and Meiado 2017;Lima et al 2018;Nascimento et al 2021). This greater tolerance interferes in species population dynamics that inhabit ecosystems with water limitations in certain seasons (Nascimento et al 2021).…”
Section: Introductionmentioning
confidence: 99%