Biometria, características físicas e absorção de água de sementes de &lt;i&gt;Enterolobium maximum&lt;/i&gt; Ducke

Farias, Carla Caroline Magalhães; Lopes, José Carlos; Moraes, Carlos Eduardo; Maciel, Khétrin Silva; Mengarda, Liana Hilda Golin

doi:10.5902/1980509814887

Cited by 4 publications

(5 citation statements)

References 13 publications

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“…O volume de água também influencia no processo de embebição. Embora cada espécie possua características únicas, a embebição consiste no processo de absorção de água pela semente, composta por três fases, proporcionando o aumento da taxa respiratória e culminando no rompimento do tegumento pelo eixo radicular (Farias et al, 2019).…”

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Influência da água sobre a germinação de sementes de Paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke)

et al. 2023

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Paricá (Schizolobium parahyba var. amazonicum) é uma espécie florestal pioneira, com potencial econômico, amplamente utilizada pelo setor madeireiro. As sementes apresentam dormência tegumentar, o que pode ser um entrave para a produção de mudas em larga escala. O objetivo deste trabalho foi avaliar a germinação de sementes de Paricá em função de diferentes volumes de água adicionados ao substrato para condução de teste de germinação. As sementes foram submetidas ao processo de desponte manual do lado oposto ao embrião para superar a dormência e depois acondicionadas em câmara de germinação, sob temperatura constante de 30 ºC e fotoperíodo de 12 horas, para a condução do teste de germinação durante 15 dias. Usou-se como substrato o papel tipo Germitest® umedecido, com quantidades (mL.g-1 papel) de água equivalentes a 2,0; 2,5; 3,0 e 3,5 vezes a massa do substrato, sem adição posterior de água. Posteriormente avaliou-se a porcentagem de germinação (GM), o índice de velocidade de germinação (IVG) e o tempo médio de germinação (TMG). O delineamento experimental foi inteiramente casualizado. Verificou-se que os maiores valores de GM e IVG foram obtidos no tratamento com volume de água equivalente a 2,5 vezes a massa do papel. O TMG foi obtido com maior precocidade nos tratamentos com quantidades de água 2,0; 2,5 e 3,0 vezes a massa do papel. Portanto, recomenda-se a condução de testes de germinação com sementes da espécie adotando o volume de água equivalente a 2,5 vezes o peso do substrato.

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Section: Fonteunclassified

Influência da água sobre a germinação de sementes de Paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke)

et al. 2023

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“…Several factors affect germination, such as substrate, water, temperature, light, and oxygen. Under appropriate soil and environment conditions, germination occurs through water absorption by the seed, determining the beginning of embryonic axis elongation and culminating in radicle protrusion (Bewley et al 2013), as observed in seeds of Apuleia leiocarpa (Spadeto et al 2018) and Enterolobium maximum (Farias et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Luminosity, temperature, and substrates on the germination of Solanum capsicoides

Baptista

Alexandre²,

Lima³

et al. 2022

Biosci. J.

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Solanum capsicoides, commonly known as red soda apple, is a little-studied species with phytotherapeutic characteristics of interest to the pharmaceutical industry. However, little is known about its agronomic characteristics. Therefore, this study aimed to assess the effect of light, different temperatures, and substrates on the germination of S. capsicoides seeds. The study consisted of two experiments: Experiment I - Germination of S. capsicoides seeds under different wavelengths. The seeds were kept on Petri dishes covered with Germitest™ paper moistened with distilled water and exposed to the monochromatic, red, far-red, and dark wavelengths. The experiment was performed in a completely randomized design with four replications of 25 seeds. Experiment II - Germination of S. capsicoides seeds on different substrates and at different temperatures. The seeds were distributed according to six substrates: paper roll, on paper, between sand, on sand, on soil + sand + manure, and between soil + sand + manure. The seeds were also subjected to the constant temperatures of 20, 25, 30, and 35 °C and the alternate temperatures of 20-30, 20-35, 25-30, and 25-35 °C, characterizing a 6 x 8 factorial arrangement. Germination rate, germination speed index, and mean germination time were evaluated. Red soda apple seeds are classified as positive photoblastic, with the highest germination rate occurring at the temperature of 20-35 °C combined with on paper, paper roll, on sand, and between sand substrates.

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“…Tegmental dormancy is common in Fabaceae (6) . Tegument is recognized as a seed protector against temperature fluctuations, humidity, and microorganism infection (7) .…”

Section: Introductionmentioning

confidence: 99%

“…In this context, seed dormancy is an undesirable characteristic for productive environments. For seed with integumentary dormancy, tegument rupture is necessary, allowing water absorption and metabolic activities to restart germination (6) . Nevertheless, germination delays caused by seed tegument may be overcome using techniques that vary from species to species.…”

Section: Introductionmentioning

confidence: 99%

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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Biometria, características físicas e absorção de água de sementes de <i>Enterolobium maximum</i> Ducke

Cited by 4 publications

References 13 publications

Influência da água sobre a germinação de sementes de Paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke)

Influência da água sobre a germinação de sementes de Paricá (Schizolobium parahyba var. amazonicum Huber ex Ducke)

Luminosity, temperature, and substrates on the germination of Solanum capsicoides

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

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