Taxas respiratórias de sementes de Eugenia pyriformis Cambess. dispersas em diferentes estádios de maturação

Lamarca, Edmir Vicente; Parisi, João José Dias; Barbedo, Claudio José

doi:10.1590/2236-8906-101/2019

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…As shown in previous studies (Araujo and Barbedo, 2017;Bonjovani and Barbedo, 2019;Guardia et al, 2020), there were no patterns of change in respiration with reduction of water content for most embryos from different regions. This result differs from the outcomes for desiccation-tolerant seeds in general, or even for some desiccation-sensitive seeds, such as Castanea sativa (Leprince et al, 1999) and Eugenia pyriformis (Lamarca et al, 2020). Science, v.43, e202143017, 2021 However, there are very few studies on respiratory rates of desiccation-tolerant seeds in their immature phases, when they are still sensitive.…”

Section: Resultsmentioning

confidence: 79%

Respiratory rates and freezing tolerance of embryos of Inga vera Willd. subsp. affinis (DC.) T.D. Penn. from different regions

Lamarca

Barbedo

2021

J. Seed Sci.

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Recalcitrant seeds are sensitive to desiccation and low storage temperatures, but there is a gradient of recalcitrance between different species and between populations of the same species. Therefore, tolerance to drying and low temperatures, as well as the respiratory rates of seeds, can be conditioned by the source of the material. The present study aimed to evaluate the relationship among desiccation and low temperature tolerance, and respiratory rates of Inga vera embryos from different regions. The embryos were submitted to three drying levels and incubated for up to fifteen days at -4, -2, 2 and 5 °C. Then, they were evaluated for respiration, germination and electrical conductivity. The embryos tolerated freezing at -4 °C since they were associated with certain levels of drying and a consequent change in the energy status of water. In conclusion, the conditions in which the embryos are formed define their degree of maturation at dispersal, hence their tolerance to desiccation and freezing.

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Section: Resultsmentioning

confidence: 79%

Respiratory rates and freezing tolerance of embryos of Inga vera Willd. subsp. affinis (DC.) T.D. Penn. from different regions

Lamarca

Barbedo

2021

J. Seed Sci.

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“…Therefore, they maintain high metabolic activity during all maturation period (Bonjovani and Barbedo, 2019; and would switch directly to a germinative metabolism (Caccere et al, 2013). These seeds have a wide range of limits of tolerance to both desiccation and freezing after dispersal (Lamarca and Barbedo, 2015;Lamarca et al, 2016;Baruth et al, 2020), but frequently they need to be maintained at high levels of water content, resulting in high metabolic activity of both the seeds themselves and the microrganisms associated to them (Parisi et al, 2016;Parisi et al, 2019;Lamarca et al, 2020;Lamarca and Barbedo, 2021), which is a challenge for ex situ conservation (Berjak and Pammenter, 2014;Barbedo et al, 2013;Gasparin et al, 2020;Amorim et al, 2021;Srivastava et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Active metabolism during desiccation of the desiccation tolerant short-lived seeds of Poincianella pluviosa (DC.) L. P. Queiroz

et al. 2022

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During embryogenesis and seed filling, developing seeds are metabolically highly active, while at the desiccation stage of tolerant seeds a decreased metabolism is expected. Seeds of Poincianella pluviosa present an extensive maturation cycle (11 months), longer than seed storability at room temperature (8 months). The metabolic profile of these seeds was characterized during maturation and drying, focusing in their role on seed behavior after shedding. Distinct responses of the embryonic axes and cotyledons to drying were observed depending on the developmental stage. Low proportions of tricarboxylic acids intermediaries until maturity indicated a low respiratory metabolism prior to the desiccation stage. Changes in shikimate, 4-coumarate, and quinate proportions suggest a metabolic shift towards the synthesis of chlorogenate isomers, found in high proportions in dispersed seeds. High proportions of lactate and glycerol were observed in immature seeds after artificial drying, but also in naturally dried axes of dispersed seeds. This suggests an active metabolism prior to drying and an osmotic stress under hypoxia, mechanisms that were never described before in desiccation-tolerant seeds. The results indicated that P. pluviosa seeds are dispersed with an incomplete metabolic switch-off, which can be related to their short lifespan.

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Uvaia (Eugenia pyriformis Cambess – Myrtaceae): An overview from the origin to recent developments in the food industry – A bibliometric analysis

Silva¹

2022

Journal of Agriculture and Food Research

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Taxas respiratórias de sementes de Eugenia pyriformis Cambess. dispersas em diferentes estádios de maturação

Cited by 4 publications

References 27 publications

Respiratory rates and freezing tolerance of embryos of Inga vera Willd. subsp. affinis (DC.) T.D. Penn. from different regions

Respiratory rates and freezing tolerance of embryos of Inga vera Willd. subsp. affinis (DC.) T.D. Penn. from different regions

Active metabolism during desiccation of the desiccation tolerant short-lived seeds of Poincianella pluviosa (DC.) L. P. Queiroz

Uvaia (Eugenia pyriformis Cambess – Myrtaceae): An overview from the origin to recent developments in the food industry – A bibliometric analysis

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