Germinação De Sementes De Capim-Arroz Submetidas a Condições De Luz E Temperatura

Bastiani, Marlon Ouriques; Lamego, Fabiane Pinto; Nunes, Joselito; Moura, Diogo da Silva; Wickert, R. J.; Oliveira, J. I.

doi:10.1590/s0100-83582015000300002

Cited by 7 publications

(6 citation statements)

References 16 publications

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“…Therefore, light did stimulate A. affinis seed germination, but it did not limit the process. Similar behavior of other grass species have also been reported by Opeña et al (2014), Bastiani et al (2015) and Batista et al (2015), corroborating our results.…”

Section: Temperature and Lightsupporting

confidence: 94%

Influence of environmental factors on carpetgrass seed germination

Pereira¹,

Souza²,

Costa³

et al. 2016

Afr. J. Agric. Res.

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The aim of this study was to verify the influence of temperature, light, substrate, sowing methods, and salt and water stress on carpetgrass (Axonopus affinis, in the Poaceae family) seed germination. All four trials were performed in a germination chamber under controlled conditions of temperature, moisture and photoperiod. Experimental designs were entirely randomized with 100 seeds per plot. For the study of temperature and light (Experiment 1), treatments were arranged in a 6 x 2 factorial scheme, with six temperature regimes (constant at 20, 25, 30, and 35°C, and alternate at 20 to 30 and 20 to 25°C) combined with two light conditions (light: 8 h of light and 16 h of dark, and dark: 24 h without light) and four replications. For the study of substrate and sowing methods (Experiment 2), there were four treatments (on paper, between paper, on sand, and in sand) with five replications. For the study of salt stress (Experiment 3), there were five treatments, composed of NaCl concentrations (0, 25, 50, 75 and 100 mM), with four replications. For the study of water stress, treatments were arranged in a 3 x 2 factorial scheme (Experiment 4), with three substrate water contents (50, 75 and 100% water retention capacity) and two sowing methods (on sand and in sand), and four replications. Germination percentage and rate were evaluated. It was concluded that seed germination was more effective at the alternate temperatures of 20 to 30 and 20 to 35°C, under light, sown on sand, on a paper substrate or between papers. The NaCl concentrations did not affect germination percentage; however, germination was slower as the NaCl concentration increased. Faster and higher germination occurred when seeds were sown on sand at 100% of its water retention capacity.

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Section: Temperature and Lightsupporting

confidence: 94%

Influence of environmental factors on carpetgrass seed germination

Pereira¹,

Souza²,

Costa³

et al. 2016

Afr. J. Agric. Res.

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“…In this sense, temperature may interfere both in overcoming the dormancy in some species, as well as in inducing a secondary dormancy (Taab and Andersson, 2009). Bastiani et al (2015) evaluated seeds of barnyard grass submitted to light and temperature conditions, and found that germination was influenced by both parameters. Seeds in conditions of high or low temperatures can undergo metabolic changes, which affect the enzymatic expression responsible for the germination process (Mertz et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

Electrical conductivity and accelerated aging in amaranth (Amaranthus crueentus L.) seeds

et al. 2018

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The objective of this study was to determine adequate conditions of water volume, seed quantity and immersion period to perform the electrical conductivity test, and to analyze the parameters of the accelerated aging test and its correlation with the the physiological potential of amaranth seeds. Five lots of amaranth seeds (Amaranthus cruentus), cultivar BRS Alegria, were used. The initial evaluation of the quality of these lots comprehended the following tests: water content, germination, first germination count, accelerated aging (traditional method, and modified versions, using unsaturated and saturated saline solution for the periods of 24, 48 and 72 h), electrical conductivity in different periods (2, 4, 6, 8 and 24 h), different quantities of water (25, 50 and 75 mL), different seed quantities (100 and 150), and field emergence. It could be concluded that the accelerated aging test at 41 °C, for 72 h, using unsaturated NaCl solution was efficient in the classification of amaranth seed lots in levels of vigor. The electrical conductivity test performed for 8 hours with 25 mL of water and 100 seeds was efficient in the classification of amaranth seeds as to their physiological potential.

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“…The germination test of weed seeds is an essential tool that provides further knowledge about the biology of species, their ecological function in the field, adaptation capacity, and potential of infestation, for the purpose of further development of management strategies (Bastiani et al, 2015). Germination is regulated by many factors, such as seed viability, seed dormancy and environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Germination of Stigmaphyllon blanchetii Seeds in Different Temperatures and Luminosity

et al. 2019

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The objective of the present work was to study the influence of temperature and light on germination of seeds of Stigmaphyllon blanchetii, popularly known as rat tail. The first stage of the research evaluated the effect of three constant temperatures (20 oC, 25 oC and 30 oC) and an alternating temperature (20-30 oC). In the second stage, for simulation of different types of light, four conditions of luminosity (white, red, far red and absence of light) were used. The temperatures that provided the best germination and development for S. blanchetii are the constant (30 oC) and the alternating (20-30 oC) ones. The seeds germinated both in the presence and absence of light, but there was greater germination and seedling development in the absence of light; thus they were classified as preferential negative photoblastic seeds.

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Germinação De Sementes De Capim-Arroz Submetidas a Condições De Luz E Temperatura

Abstract: Germinação de sementes de capim-arroz submetidas a condições ... 1Recebido para publicação em 3.5.2015 e aprovado em 8.5.2015.

Cited by 7 publications

References 16 publications

Influence of environmental factors on carpetgrass seed germination

Influence of environmental factors on carpetgrass seed germination

Electrical conductivity and accelerated aging in amaranth (Amaranthus crueentus L.) seeds

Germination of Stigmaphyllon blanchetii Seeds in Different Temperatures and Luminosity

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