Potencial fisiológico de sementes de Clitoria fairchildiana R. A. Howard. - Fabaceae submetidas a diferentes regimes de luz e temperatura

Alves, Magnólia Martins; Alves, Edna Ursulino; Bruno, Riselane de Lucena Alcântara; Silva, Katiane da Rosa Gomes da; Santos-Moura, Sueli da Silva; Barrozo, Leandra Matos; Araújo, Luciana Rodrigues de

doi:10.1590/s0103-84782012005000118

Cited by 9 publications

(9 citation statements)

References 15 publications

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“…Along with the light factor, temperatures of 25 and 30°C led to increased epicotyl length, with increases of 20.89 and 38.98%, respectively, when compared to that in the absence of light. These results are similar to those reported by Alves et al (2012), who found that the greatest Clitoria fairchildiana length occurred at a temperature of 30°C under a white light regime. The temperatures of 30, 25, and 20-30°C (in this order) showed higher mean values of epicotyl dry mass, with the highest results obtained under light conditions, with the exception of 25°C, at which the mean values were not different (Table 6).…”

Section: Resultssupporting

confidence: 91%

“…These results corroborate, in part, those obtained by Guedes et al (2010), who found 25, 30, and 20-30°C to be some of the most ideal temperatures for the final germination percentage of A. cearensis seeds. The temperature range of 20 to 30°C can be considered optimal for the seed germination of forest species (Diniz et al, 2008;Alves et al, 2012;Nogueira et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

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Germination and development of Amburana cearensis seedlings as influenced by seed weight, light and temperature

et al. 2017

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ABSTRACT. The objective of this work was to study the seed germination and seedling growth of A. cearensis (Allemão) A. C. Sm. influenced by seed weight and under different temperature and light conditions. Seeds were individually weighed and divided into three weight classes (light, medium and heavy), and each was subjected to germination tests under two light conditions (presence or absence) and six temperature regimes (20, 25, 30, 35, 40, and 20-30°C). The experiment was established with a completely randomized design in a split-split plot arrangement with four replicates. We determined the first count, final germination percentage and germination speed index. To assess seedling growth, the length and dry mass of the epicotyl and root + hypocotyl axis were also determined. The data were subjected to Tukey's test (p ≤ 0.05). The optimal conditions for seed germination occurred at a temperature of 30°C, with light and medium seeds showing greater vigour. Temperatures of 35 and 40°C were detrimental to the growth of the species, whereas the best conditions occurred with light and medium seeds at temperatures of 25 and 30°C in the presence of light.Keywords: cumaru, abiotic factors, seed vigour.Germinação e desenvolvimento de plântulas de Amburana cearensis em função do peso da semente, luz e temperatura RESUMO. O objetivo do trabalho foi estudar a germinação de sementes e o crescimento de plântulas de Amburana cearensis (Allemão) A. C. Sm. em função do peso das sementes sob diferentes condições de temperatura e luz. As sementes foram pesadas individualmente e separadas em três classes (leves, médias e pesadas), e cada uma foi submetida a testes de germinação em duas condições de luz (presença e ausência) e seis regimes de temperatura (20, 25, 30, 35, 40 e 20-30°C). O experimento foi inteiramente casualizado em parcela subsubdividida com quatro repetições. Nós determinamos a primeira contagem, porcentagem final e o índice de velocidade de germinação. Para a avaliação do crescimento das plântulas, o comprimento e a massa seca do epicótilo e do eixo raiz/hipocótilo. As condições ótimas para a germinação das sementes ocorreram na temperatura de 30°C e com um maior vigor com sementes leves e médias. As temperaturas de 35 e 40°C foram prejudiciais ao crescimento da espécie, enquanto as melhores condições ocorreram com as sementes leves e médias nas temperaturas de 25 e 30°C e na presença de luz.Palavras-chave: cumaru, fatores abióticos, vigor de sementes.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Germination and development of Amburana cearensis seedlings as influenced by seed weight, light and temperature

et al. 2017

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“…The occurrence of germination under different light conditions may be due to the active-form phytochrome present in the seed in a quantity sufficient to induce the germination process (Marcos Filho, 2015). Similar to the results observed in this study, seeds of several species are indifferent to light regime, including Clitoria fairchildiana R. A. Howard (Alves et al, 2012) and Dalbergia cearensis Ducke (Nogueira, Gallão, Bezerra, & Medeiros Filho, 2014), which are capable of germinating in the both presence and absence of light.…”

Section: Resultssupporting

confidence: 87%

Light regime and temperature on seed germination in Salvia hispanica L.

et al. 2016

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ABSTRACT. This study evaluated the effects of different light regimes and temperatures on the germination of S. hispanica seeds and used a factorial scheme in a completely randomized experimental design, in which three light conditions were combined with six temperatures (constant 20, 25, 30 and 35°C and alternating 20-30 and 25-30°C), totaling 18 treatments with four 50-seed replications. The seeds were sown on blotting paper in transparent plastic boxes and then allowed to germinate in Biochemical Oxygen Demand germinators. The seeds were evaluated over a period of eight days with respect to the following variables: germination percentage, average germination time, shoot and root lengths, shoot and root dry weights and root-shoot ratio. The data were submitted to Tukey's test (p ≤ 0.05%). The S. hispanica seed (beige colored) germination test can be carried out at constant (25°C) or alternating (25-30°C) temperatures. The germination of the seeds was indifferent to the light conditions evaluated; however, there was increased seedling growth and dry matter accumulation in the presence of light. The duration of the S. hispanica seed germination test can be five days, with the first count on the second day after sowing.Keywords: chia, seeds analysis, germination test.Regime de luz e temperatura na germinação de sementes de Salvia hispanica L. RESUMO.A pesquisa teve como objetivo avaliar os efeitos de diferentes regimes de luz e temperaturas sob a germinação de sementes de S. hispanica. Adotou-se delineamento experimental inteiramente casualizado em esquema fatorial constituído pela combinação de três condições de luminosidade (luz constante, escuro constante e alternância luz/escuro com 8h de luz e 16h de escuro) e seis temperaturas (quatro temperaturas constantes 20, 25, 30 e 35°C, e duas alternadas 20-30 e 25-30°C), perfazendo 18 tratamentos em quatro repetições de 50 sementes. As sementes foram semeadas em caixas plásticas transparentes, tendo como substrato papel mata-borrão e colocadas para germinar em Biochemical Oxigen Demand. As sementes foram avaliadas durante oito dias através das seguintes variáveis: percentagem de germinação, tempo médio de germinação, comprimento da parte aérea e da radícula, massa seca da parte aérea e da radícula e relação raiz/parte aérea. Os dados foram submetidos ao teste de Tukey (p ≤ 0,05%). O teste de germinação de sementes de S. hispanica (coloração bege) pode ser conduzido em temperaturas constante de 25°C e alternada de 25-30°C. A germinação das sementes mostrou-se indiferente à luminosidade, no entanto, verificou-se maior crescimento das plântulas e acúmulo de massa seca na presença de luz. A duração do teste de germinação de sementes S. hispanica pode ser de cinco dias, com a primeira contagem realizada no segundo dia após a semeadura.Palavras-chave: chia, análise de sementes, teste de germinação.

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“…and classified them as indifferent to light during germination. It was also observed for seeds of Clitoria fairchildiana R. A., considered neutral photoblasts, which germinated in all the light regimes provided [38].…”

Section: Light Quality On Seed Germinationmentioning

confidence: 71%

Overcoming Dormancy and Influence of Light on the Physiological Quality of Senna cana (Fabaceae) Seeds

Medeiros

Feliciano

Matos

et al. 2019

JEAI

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Environmental factors affect the germination process, like the presence of seed coat and the quality of light; these informations are still scarce for many native species from Brazil, especially for Senna cana, which there are no adequate standards and methodologies to be used in germination tests. The aim of this research was to recommend adequate pre-germinative treatment(s) to overcome seed dormancy, and determine the degree of influence of different light regimes in seed germination of S. cana. Two experiments were carried out: T1-evaluation of different methods of dormancy overcoming (intact seeds (control), T2-imbibition of the intact seeds for 24 hours (in distilled water), T3-scarified seeds with sandpaper n° 100 in the hilum opposite region, T4-scarified seeds with sandpaper n° 100 in the region the hilo opposite region and imbibition in water (in distilled water) for 24 hours; T5-imbibition in water at 80°C); 2-Influence of light quality on seed germination and vigor (white light, red light, far red light and absence of light). The evaluated parameters were: first JEAI, 32(5): 1-9, 2019; Article no.JEAI.47671 2 germination count, percentage of germination, IVG (Germination speed index), MGT (Mean germination time). Treatments were compared by Tukey at 5% probability. The best method for overcoming seed dormancy was mechanical scarification with sandpaper nº 100. The germination of the seeds of S. cana can be classified as indifferent to the luminosity, despite germinative response be greater under white and red light. Original Research Article

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Potencial fisiológico de sementes de Clitoria fairchildiana R. A. Howard. - Fabaceae submetidas a diferentes regimes de luz e temperatura

Cited by 9 publications

References 15 publications

<b>Germination and development of <i>Amburana cearensis</i> seedlings as influenced by seed weight, light and temperature

<b>Germination and development of <i>Amburana cearensis</i> seedlings as influenced by seed weight, light and temperature

<b>Light regime and temperature on seed germination in <i>Salvia hispanica</i> L.

Overcoming Dormancy and Influence of Light on the Physiological Quality of Senna cana (Fabaceae) Seeds

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