Influência do armazenamento na qualidade fisiológica de sementes de Caesalpinia pyramidalis Tul.

Antunes, Cimille Gabrielle Cardoso; Pelacani, Claudinéia Regina; Ribeiro, Renata Conduru; Gomes, Hugo Leonardo Rodrigues; Castra, Renato Delmondez de

doi:10.1590/s0100-67622010000600005

Cited by 8 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…After harvest, the fruits were dried on a canvas and protected from rain and sun until the fruit dehisced and the seeds were manually separated from the fruit remains (Matias et al 2014). Although there is no information about the effect of seed storage on this species, seeds of C. pyramidale stored at similar conditions for more than six months showed no change in germination percentage and speed (Antunes et al 2010). Thus, after processing seeds were placed in labelled plastic bags and stored in a temperature-and humidity-controlled room (10±2°C and 40±5% RH) for no more than 2 months until the beginning of the experiments.…”

Section: Study Speciesmentioning

confidence: 99%

Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis

Gomes¹,

Oliveira

Araújo

et al. 2019

Folia Geobot

View full text Add to dashboard Cite

Seasonally tropical dry forests are among the most threatened environments by climate change. However, these forests, which are at risk of desertification, are still poorly studied and conserved. Seeds of several species endemic to the Caatinga, a Brazilian dry forest, are also understudied, mainly regarding their ability to cope with a hotter and drier climate predicted for the future. For the first time in seeds of Cenostigma microphyllum (Leguminosae), we aimed to study the presence of physical dormancy, temperature and salt tolerance to ascertain the effects of current and future climate on seed germination. Intact and scarified seeds were investigated by incubating at constant temperatures (15 to 40°C) or in NaCl solutions (−0.2 to −1.0 MPa) at 25 and 30°C. Thermal and osmotic thresholds, as well as thermal time and hydrotime constants, were calculated using linear regressions between the germination conditions and germination rate. To predict germination in the future, a heat sum model based on thermal time and hydrotime was applied to current and future climate scenarios. Seeds of C. microphyllum were permeable to water and did not have physical dormancy. The results indicated that increases in temperature are unlikely to affect germination, despite greater sensitivity to salinity presented at higher temperatures. In a future climate, the reduction in the number of weeks with at least 15 mm rainfall will affect the germination timing for the seeds. Thus, we can conclude that under the most pessimistic climate scenario predicted for the future, the seed germination of C. microphyllum may be restricted, likely leading to low seedling recruitment and establishment.Keywords temperature . salt stress . climate change . thermal time model . hydrotime model

show abstract

Section: Study Speciesmentioning

confidence: 99%

Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis

Gomes¹,

Oliveira

Araújo

et al. 2019

Folia Geobot

View full text Add to dashboard Cite

show abstract

“…O sucesso para se armazenar sementes depende da sua longevidade. O armazenamento deve ser iniciado no período da maturidade fisiológica, quando as sementes apresentam elevada qualidade, prolongando sua longevidade durante o período de armazenamento, por meio do controle da umidade, da temperatura e das condições do ambiente onde serão armazenadas (ANTUNES et al, 2010).…”

Section: Qualidade De Sementesunclassified

Pensando a biodiversidade: aroeira (Schinus terebinthifolius Raddi.)

Gomes¹,

Silva-Mann²,

Mattos³

et al. 2013

View full text Add to dashboard Cite

“…In addition, the low seed viability of these species after a short storage time, especially recalcitrant seeds, hinders the propagation of tree species for the restoration of degraded areas (Carvalho et al 2008). Therefore, studies of physiological classification in relation to the seed-storage capacity of native tree species have increased due to the need for viable seeds for conservation programs, as adequate storage conditions have been established for only a few species (Carvalho et al 2006(Carvalho et al , 2008Aguiar et al 2010;Antunes et al 2010;Corte et al 2010;Sasaki et al 2013). However, given the great diversity of species, additional studies are required, especially those related to seed storage for trees.…”

Section: Introductionmentioning

confidence: 99%

Polyamine, amino acid, and carbohydrate profiles during seed storage of threatened woody species of the Brazilian Atlantic Forest may be associated with seed viability maintenance

et al. 2016

View full text Add to dashboard Cite

Due to the economic importance of wood production, species including Cedrela fissilis Vell. and Cariniana legalis (Mart.) Kuntze have been heavily exploited and are currently threatened with extinction. In addition, these species produce seeds with low viability when stored for long periods. In this work, the effect of storage time on seedling emergence and alterations in the levels of biomolecules such as carbohydrates, polyamines (PAs), and amino acids were analyzed in C. fissilis and C. legalis seeds. Seedling emergence and the emergence speed index were significantly reduced during seed storage in both species, with a greater reduction for C. legalis seeds. Sucrose was detected in both species, with the highest levels in C. fissilis seeds, whereas the monosaccharides glucose and fructose were detected only in C. legalis seeds. Higher levels of putrescine (Put) were observed in C. legalis seeds than in C. fissilis seeds. In contrast, C. fissilis seeds showed a significant increase in most of the amino acids analyzed. These results suggest that the presence of glucose and fructose, the higher level of Put, and the lower levels of amino acids observed in C. legalis seeds may be associated with greater reductions in vigor and seedling emergence compared with C. fissilis seeds. This is the first report showing these relationships among carbohydrates, PAs, and amino acids in these species and may be useful for further studies on seed conservation of timber species.

show abstract

Influência do armazenamento na qualidade fisiológica de sementes de Caesalpinia pyramidalis Tul.

Cited by 8 publications

References 9 publications

Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis

Influence of current and future climate on the seed germination of Cenostigma microphyllum (Mart. ex G. Don) E. Gagnon & G. P. Lewis

Pensando a biodiversidade: aroeira (Schinus terebinthifolius Raddi.)

Polyamine, amino acid, and carbohydrate profiles during seed storage of threatened woody species of the Brazilian Atlantic Forest may be associated with seed viability maintenance

Contact Info

Product

Resources

About