Temperature Dependent Seed Germination of Dalbergia nigra Allem (Leguminosae)

Ferraz-Grande, Fernanda Gollo A.; Takaki, Massanori

doi:10.1590/s1516-89132001000400010

Cited by 25 publications

(14 citation statements)

References 5 publications

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“…Samples from the two seed lots were germinated in Petri dishes on two sheets of germitest paper, moistened with distilled water under continuous light provided by four 40 W fluorescent, daylight-type lamps at a constant temperature of 25 °C for 12 days (Ferraz-Grande and Takaki, 2001). Seeds were considered germinated when the radicle protruded.…”

Section: Methodsmentioning

confidence: 99%

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

et al. 2013

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Seed imbibitions is the first stage of the germination process and is characterized by the hydration of tissues and cells and the activation and/or induction of the enzymes responsible for mobilizing reserves for respiration and the construction of new cell structures. The objective of this study was to investigate the alterations in reserve substances during slow hydration of Bahia Rosewood (Dalbergia nigra) seeds in water. Seeds from two different lots (Lot I and II) were placed in saturated desiccators (95-99% RH) to hydrate at 15 and 25 °C until water contents of 10, 15, 20 and 25% were reached. At each level of hydration, changes in lipid reserves, soluble carbohydrates, starch and soluble proteins were evaluated. The mobilization of reserves was similarly assessed in both lots, with no differences being observed between the two hydration temperatures. Lipid contents showed little variation during hydration, while the contents of soluble carbohydrates and starch decreased after the 15% water content level. Soluble proteins showed a gradual tendency to decrease between the control (dry seeds) up to 25% water content.

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Section: Methodsmentioning

confidence: 99%

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

et al. 2013

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“…Assim, as sementes foram incubadas por 24, 48, 72 e 96 h, nas temperaturas de 5 e 15 °C; e por 8, 16 e 24 h, nas temperaturas de 35 e 45 °C. Após esses períodos, foram transferidas para o germinador, a 25 °C, sob luz constante, pois essa temperatura está na faixa ideal para germinação da espécie (FERRAZ-GRANDE;TAKAKI, 2001;GUEDES et al, 2011a). Esses períodos foram considerados para a duração total do teste de germinação, que totalizaram 12 dias.…”

Section: Introductionunclassified

FISIOLOGIA DA GERMINAÇÃO DE SEMENTES DE Dalbergia nigra(Vell.) Allemão ex Benth. SOB DIFERENTES TEMPERATURAS E TEMPOS DE EXPOSIÇÃO

2015

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4RESUMO -A germinação de sementes é dependente de fatores abióticos, sendo a temperatura um dos principais, cuja influência, em condições extremas, causa danos às sementes. Este trabalho teve por objetivo investigar o efeito das diferentes temperaturas durante a germinação de Dalbergia nigra e suas implicações na fisiologia das sementes. Avaliaram-se o percentual de germinação, o índice de velocidade de germinação (IVG) e a integridade de membranas celulares pelo teste de condutividade elétrica de sementes em diferentes tempos de exposição às temperaturas de 5, 15, 25 (controle), 35 e 45 °C. A temperatura de 25 ºC correspondeu à temperatura ideal de germinação. Em temperaturas de 5 e 45 ºC, a germinação foi nula. Houve redução da germinação de sementes de D. nigra com o aumento do tempo de exposição das sementes às temperaturas de 5, 15, 35 e 45 °C. Diferentemente das demais temperaturas, a semipermeabilidade da membrana não é recuperada nas temperaturas de 5 e 45 ºC. A condutividade elétrica é uma técnica eficiente para avaliar a qualidade fisiológica das sementes em diferentes temperaturas.Palavras-chave: Fisiologia; Jacarandá-da-bahia; Membranas celulares. PHYSIOLOGY OF SEED GERMINATION OF Dalbergia nigra (Vell.) Allemão ex Benth. UNDER DIFFERENT TEMPERATURES AND EXPOSURE TIMES

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“…In nature, some seeds are adapted to germinate under light, others in its absence, by scarification, in decreasing or optimal temperatures, or through other strategies (Gómes-Pompa and Vázquez-Yanes, 1981;Metivier, 1985;Ferraz-Grande and Takaki, 2001). Many seeds and sprouts of Neotropical plant species germinate in the beginning of the wet season to assure full development during a period of surplus water (Garwood, 1983;Morellato et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Germination in seed species ingested by opossums: implications for seed dispersal and forest conservation

Cáceres

Monteiro‐Filho

2007

Braz. arch. biol. technol.

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Temperature Dependent Seed Germination of Dalbergia nigra Allem (Leguminosae)

Cited by 25 publications

References 5 publications

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

FISIOLOGIA DA GERMINAÇÃO DE SEMENTES DE Dalbergia nigra(Vell.) Allemão ex Benth. SOB DIFERENTES TEMPERATURAS E TEMPOS DE EXPOSIÇÃO

Germination in seed species ingested by opossums: implications for seed dispersal and forest conservation

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