GERMINAÇÃO DE SEMENTES EM FUNÇÃO DO TRATAMENTO PRÉ-GERMINATIVO DE Chamaecrista

Araújo, José Eduardo Vargas Lopes; Nery, Marcela Carlota; Filho, João Graciano Mendonça; Pires, R. M. O.; Nery, Fernanda Carlota; Fialho, Cíntia Maria Teixeira

doi:10.28998/rca.v15i1.2363

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…A dormência é um fenômeno próprio da semente, uma forma natural da resistência a fatores adversos do ambiente (ARAÚJO et al, 2017). Pode ser atribuída usualmente aos tegumentos impermeáveis e a imaturidade fisiológica ou a colheita recente, onde a germinação só ocorrerá quando esta for superada e as condições ambientais forem favoráveis ao crescimento das plântulas (CASTRO et al, 2017).…”

Section: Introductionunclassified

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

Lima

Silva

Oliveira

et al. 2020

BJD

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Section: Introductionunclassified

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

Lima

Silva

Oliveira

et al. 2020

BJD

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“…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. Lima et al (5) also verified this same response of C. rotundifolia using 80 °C water for 5 and 10 s; Araújo et al (15) found similar results for Chamaecrista debilis seeds treated with water at 100 °C for 5, 10, and 15 s.…”

Section: Discussionmentioning

confidence: 67%

“…Effects of dormancy-breaking techniques can vary with species. Although mechanical scarification was not evaluated in this study, it could increase seed susceptibility to damage, mostly in the smallest seeds, as described by Araújo et al (15) , who observed low efficiency of mechanical scarification on C. debilis.…”

Section: Discussionmentioning

confidence: 80%

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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“…This mechanism can occur due to an imposition made by the integument, due to the imbalance of substances that promote or inhibit germination, or because of the embryo (Araújo et al, 2017b). However, among these types of dormancy, tegumentary dormancy, also known as exogenous dormancy, is the most common in species in the Fabaceae family (Baskin;Baskin, 2014).…”

Section: Numbness In Forest Species Focusing On Tegumentary Numbnessmentioning

confidence: 99%

Chemical and Mechanical Scarification as Techniques for Overcoming Dormance in Red Tent Seeds (Adenanthera pavonina L.)

Vieira,

Araujo,

Souza

et al. 2024

RGSA

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Purpose: Evaluate chemical and mechanical scarification techniques, as methods for overcoming dormancy in red vine seeds. Theoretical Framework: Based on scientific articles found on search engines and books in the field of seeds, types of forest seeds, types of dormancy in forest seeds and techniques for overcoming dormancy. In order to support the explanation of how techniques for overcoming dormancy are related to the rate and time of germination of red seed seeds, and how germination time can subsequently affect the quantity of seedlings produced, as well as their initial growth. Method: The experiment was installed to test the following treatments: T0 – without scarification; T1 – mechanical scarification; T2 chemical scarification with 80% H2SO4 for half an hour; T3 – chemical scarification with 80% H2SO4 for one hour; T4 – chemical scarification with 0.4% KNO3 for half an hour; T5 – chemical scarification with 0.4% KNO3 for one hour. The design used was completely randomized, with six treatments, five replications and 20 seeds in each replication. At the end of 30 days, counting from the beginning of germination, the following variables were evaluated: germination speed index (IVG), average germination time (TMG), germination percentage (G) and germination speed index (IVG). Results and Conclusion: The most efficient methods for germinating the red tent seeds were mechanical scarification with sandpaper and immersion in 0.4% KNO3 for half an hour. However, mechanical scarification would be the most easily used and least expensive method for producing seedlings in nurseries. Research Implications: These results indicate that the mechanical scarification technique is an efficient method for overcoming the dormancy of the red tent, which is integumentary. Understanding the most efficient and effective techniques for overcoming dormancy in seeds of species that present this characteristic is important to allow, within the nursery, germination to occur quickly and uniformly. Consequently, making it possible to obtain seedlings with more uniform sizes, even though these are produced from seeds. Originality/Value: A high germination rate and uniform initial growth are important factors within the nursery, especially if it is of a commercial nature, but also for the restoration of areas, because it allows seedlings to be obtained in less time.

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GERMINAÇÃO DE SEMENTES EM FUNÇÃO DO TRATAMENTO PRÉ-GERMINATIVO DE Chamaecrista

Cited by 4 publications

References 13 publications

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

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

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

Chemical and Mechanical Scarification as Techniques for Overcoming Dormance in Red Tent Seeds (Adenanthera pavonina L.)

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