Superação de dormência e qualidade da luz na germinação de sementes de Chamaecrhysta rotundifolia (Pers.) Greene

Lima, Mariana Pereira Moura; Silva, Caciano da Conceição; Oliveira, Sebastião Rodrigo do Remédio Souza de; Faria, Letícia de Abreu; Saraiva, Marcelo Pires; Rodrigues, Alessandra Epifanio; Pamplona, Vanessa Mayara Souza; Quadros, Bárbara Rodrigues de

doi:10.34117/bjdv6n7-141

Cited by 2 publications

(7 citation statements)

References 7 publications

(7 reference statements)

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“…In this context, our results for percentage emergence are similar to those observed by Lima et al (5) , in which there was 14% germination of C. rotundifolia seeds in a lab-controlled environment. These similarities could point to low soil influence on germination, confirmed by the absence of effects of soil, or its interaction, on treatments of dormancy-breaking.…”

Section: Discussionsupporting

confidence: 92%

“…Chamaecrista rotundifolia seed dormancy could be verified in this study through the low emergence of seedling in the control group and the increased emergence in other treatments (Table 2), corroborating the findings of Lima et al (5) through the germination data. The low seedling emergence, especially in the control group, was possibly due to the low germination index associated with dormancy.…”

Section: Discussionsupporting

confidence: 91%

“…However, thermal shock proportionated by HW increased seedling emergence (Table 2), corroborating with Lima et al (5) , although these authors evaluated germination in a controlled environment.…”

Section: Discussionsupporting

confidence: 87%

“…The data presented in this study and by Lima et al (5) highlight the necessity of dormancybreaking techniques for C. rotundifolia. The superiority of HW over HA and control (Table 2) as well as 6.7 percentage units above that of water immersion treatment could indicate this technique as appropriate for C. rotundifolia.…”

Section: Discussionsupporting

confidence: 69%

“…Knowledge about C. rotundifolia in agriculturally productive environments is still being established through studies in the Amazon region. Moreover, there are some challenges for the establishment of this species as forage in tropical pastures in Brazil, as the seeds are commercially unavailable (4) and present dormancy (5) .…”

Section: Introductionmentioning

confidence: 99%

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Dormancy-breaking treatments and soil types on Chamaecrista rotundifolia emergence and initial development

et al. 2021

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Chamaecrista rotundifolia is a legume of high yield and nutritional value for livestock; however, it presents high seed dormancy. The aim of this study was to evaluate dormancy-breaking methods and the influence of soil texture on seedling emergence and initial development of C. rotundifolia. The experiment was performed in a greenhouse in a split-plot design with five replications. There were three treatments including dormancy-breaking techniques with immersion of the seeds in (1) hot water at 80°C for 30 s followed by 12 h in water at room temperature (25 °C; HW); (2) water at room temperature (25 °C) for 24 h (EW); and (3) hydrochloric acid (0.05 mol L-1) for 15 min (HA) (4) and a control group with no seed intervention, disposed in the main plots in randomized blocks. Seeds were cropped in two types of soil as subplots. Seedling emergence was evaluated daily to calculate the percentage emergence and emergence speed index. Plant performance was evaluated (21 days after sowing) through measurements of mass and length of components. Chamaecrista rotundifolia showed a high degree of dormancy in the seeds, and the treatment using HW had greater efficiency in seedling emergence (p < 0.01) and emergence speed index (p < 0.05). Total dry mass was superior in sandy soil (p < 0.05). Soil texture and dormancy treatments influenced the initial performance of plants, which performed better in sandy soil.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

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Dormancy-breaking treatments and soil types on Chamaecrista rotundifolia emergence and initial development

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Superação de dormência e qualidade da luz na germinação de sementes de Leucaena leucocephala (Lam.) de Wit

Araújo

Oliveira

Vicenzott

et al. 2020

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O presente trabalho teve como objetivo estudar métodos para superação da dormência de sementes de Leucaena leucocephala, além de avaliar sua resposta germinativa em diferentes regimes de luz. Os tratamentos para avaliar a superação de dormência foram controle, escarificação mecânica com lixa, imersão em ácido sulfúrico, imersão em concentrado de nitrato de potássio, imersão em água a 80°C, incubação em estufa a 70°C. Para avaliar a qualidade da luz foram testados filtros nas cores azul, vermelho, verde, ausência de luz e transparente (controle). O delineamento experimental foi inteiramente casualizado, com cada tratamento com quatro repetições de 25 sementes cada. Os dados foram submetidos à análise de variância e a comparação entre as médias foi feita pelo teste de Tukey a 5% de probabilidade. O tratamento que melhor superou a dormência tegumentar das sementes L. leucocephala, com maior percentual germinativo e vigor foi lixa de madeira nº180. Para a qualidade de luz as sementes de L. leucophala podem ser classificadas como fotoblásticas neutras, pois a ausência ou presença de luz não interferiu na sua germinação.

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Superação de dormência e qualidade da luz na germinação de sementes de Chamaecrhysta rotundifolia (Pers.) Greene

Abstract: Superação de dormência e qualidade da luz na germinação de sementes de chamaecrhysta rotundifolia (Pers.) Greene Overcoming dormancy and light quality in the Germination of seeds of chamaecrhysta rotundifolia (Pers.

Cited by 2 publications

References 7 publications

Dormancy-breaking treatments and soil types on Chamaecrista rotundifolia emergence and initial development

Dormancy-breaking treatments and soil types on Chamaecrista rotundifolia emergence and initial development

Superação de dormência e qualidade da luz na germinação de sementes de Leucaena leucocephala (Lam.) de Wit

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