Superação da dormência em sementes de crista de galo

Ferreira, Elaine Barros; Matos, Valderez Pontes; Sena, Lúcia Helena de Moura; Sales, Aldo Torres; Santos, Helder Henrique Duarte

doi:10.1590/s0103-84782012000500008

Cited by 5 publications

(6 citation statements)

References 11 publications

(8 reference statements)

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“…We observed, in this study, that the germination of the two species of cockscomb are indifferent to presence of light, characterizing them as neutral photoblastic, according to what was proposed by Labouriau (1983), that is, they germinate with the presence and absence of light. Ferreira et al (2012) working with different methods for the overcoming of seeds dormancy of C. cristata verified great germinative percentages for the all the methods with presence of light. Yet Okusanya (1980) verified that the germination of seeds of C. cristata occurs independent of different intensities or even absence of light.…”

Section: Resultsmentioning

confidence: 81%

“…Among them, the two species of cockscomb (Celosia argentea L. and Celosia cristata L.), originating in Asia, have erect size and little branched, from 30 to 90 cm of height, green leaves and slightly reddish, ornamental inflorescences of several colors, among red, yellow and white (LORENZI, 2013). Their inflorescences, of summer cultivation in Rio Grande do Sul, are produced from seeds, which have their physiological and sanitary qualities affected by the adopted management, mainly, in germination (FERREIRA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Fotoblastismo e temperaturas na germinação de sementes de celosias

Menegaes

Barbieri

Bellé

et al. 2018

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Germination is the result of the triggering of various processes occurred in the seed, which are influenced by the environmental conditions, especially light and temperature. In this way, the objective of the present study was to evaluate the influence of different temperatures and photoblastic on the germination of cockscomb seeds. The experiment was carried out in a completely randomizeddesign, with a 2 x 5 factorial scheme (two lighting regimes and five temperatures), with four replicates of 50 seeds, for two species of cockscomb (Celosia argentea L. and C. cristata L.). The lighting regimes were with absence (dark continuous) and the presence of light (photoperiod of 24 h), and temperatures were constant at 15, 20, 25, 30 and 35 ºC. The seed lots of the two species of cockscomb were cultivated in 2012 and stored in a cold chamber (15 ºC and 40% RH), with an average moisture content of 11% and a mean germination of 98%. The results of the laboratory tests indicated that the two species of cockscomb presented fast germination in average 2.5 and 4.5 days for the regimes with presence and absence of illumination, respectively, characterizing as neutral photoblastic species. However, it was observed that the temperature is a limiting factor for the germination of the two species of cockscomb, having its optimal thermal range between 20 and 30 ºC.

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Section: Resultsmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Fotoblastismo e temperaturas na germinação de sementes de celosias

Menegaes

Barbieri

Bellé

et al. 2018

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“…After this period there was a tendency to stabilization of seeds hydration. Bertolin et al (2011) observed in the accelerated aging test with different lots of bean (Phaseolus vulgaris L.) that there was an increase in the seeds degree of humidity according to time of exposure to heat, with negative influence on the germinative percentage. Guedes et al (2013) reported that in accelerated aging test, the wetting speed of seeds is what determines the intensity of deterioration of the same according to the membrane rearrangement, what leads to anticipation of metabolic triggering of Phase I of three-phase standard described by Bewley e Black (1994).…”

Section: Resultsmentioning

confidence: 99%

“…The species of cockscomb, of annual crop, flourish in summer and in autumn, producing a large quantity of seeds per plant. However, the quality of these seeds depends directly on the crop management adopted, which is going to influence the percentage and speed of germination (FERREIRA et al, 2012). The seed is an important agricultural input and vital to the success or failure of crop, because it contains the productive potentialities of the plant and the preservation of genetic resources.…”

Section: Introductionmentioning

confidence: 99%

Envelhecimento acelerado de sementes de Celosia argentea e Celosia cristata

Menegaes

Barbieri

Bellé

et al. 2018

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Celosia argentea L. and Celosia cristata L. are plants that are differentiated by the intensity and color of their flowering, and can be used as garden or cut-flower, with characteristic propagation by seeds produced in large quantities. The present study aimed to evaluate the physiological and sanitary quality of Celosia argentea and Celosia cristata seeds subjected to the accelerated aging test. The experiment was carried out in October 2016, using a completely randomized design, in a 2 × 6 factorial scheme (two temperatures: 41 and 45 oC and six periods of heat exposure: 0 (control), 24, 48, 72, 96 and 120 h), with four replicates of 50 seeds, for the two species of cockscomb (C. argentea and C. cristata). The seed lots of the two species of celosia are from the crops in the year 2012 and were stored in a cold chamber (15 oC and 40% RH), with an average moisture content of 11% and a mean germination of 98%. After the accelerated aging test, the physiological and sanitary qualities of the seeds of the two species of celosia were evaluated. We conclude that the accelerated aging proved to be effective for the evaluation of vigor, germination and emergence in the species field, when submitted to temperatures of 41 and 45 oC up to 120 h.

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“…As sementes quando expostas a temperaturas mais elevadas, associada a um maior tempo de imersão, sofreram redução significativa no potencial germinativo. Resultados similares também foram observados noutros táxones (Azania et al, 2009;Grazielle et al, 2012).…”

Section: Resultsunclassified