Seed Germination as Affected by Soil Moisture and Salinity<sup>1</sup>

Ayers, A. D.

doi:10.2134/agronj1952.00021962004400020006x

Cited by 97 publications

(46 citation statements)

References 2 publications

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“…Estos síntomas varían radícula, muestran una disminución progresiva con con los estados fenológicos de los cultivos, siendo el aumento de los niveles salinos. más notable durante las primeras etapas del crecimiento (24).…”

Section: Longitud De La Radícula De Panicum Maximumunclassified

EFFECT OF SALT STRESS ON SEED GERMINATION AND VIGOR Panicum maximum Jacq. VARIETIES TANZANIA AND MOMBASA

Salomón

Samudio

2016

Compend. cienc. vet

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ABSTRACT. Soil salinity is one limiting factor in agricultural productivity and feed crops, this is why is important for sustainable agriculture to go deep into the study of salt tolerance. The experiment was conducted in the Laboratorio de Análisis de Calidad de Semillas de la Facultad de Ciencias Agrarias of the Universidad Nacional de Asunción, during the months of December 2012 and January 2013, with the objective of evaluating the effect of different concentrations of sodium chloride (NaCl) in the substrate over the germination potencial and vigor of seeds of two varieties of Panicum maximum. The seeds of two varieties of P. maximum (Tanzania and Mombasa) were seeded in moist substrates with salt solutions of different concentrations of NaCl (0; 8,6; 16,6; 22,3 mS.cm-1). The experimental design was factorial (4x2), which consisted of four treatments and four replications for each variety. The germination percentage, germination speed and germination speed rate, plus the length of the aerial part and root were determined. Germination was significantly reduced with increasing salinity, for both varieties. Likewise, the germination speed and germination speed rate were negatively influenced by salinity. Both studied varieties have a certain rate of sensibility, Tanzania being most tolerant than Mombasa.

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Section: Longitud De La Radícula De Panicum Maximumunclassified

EFFECT OF SALT STRESS ON SEED GERMINATION AND VIGOR Panicum maximum Jacq. VARIETIES TANZANIA AND MOMBASA

Salomón

Samudio

2016

Compend. cienc. vet

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“…Além disso, alguns autores reportam que a salinidade pode comprometer a germinação, dificultando a absorção de água pelas sementes, bem como facilitando a entrada de íons em níveis tóxicos (Ayres, 1952;Perez & Moraes, 1994;Fanti & Perez, 1998;Souza Filho et al, 2001). …”

Section: Estresse Salinounclassified

Fatores ambientais sobre a germinação de Emilia sonchifolia

et al. 2009

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5RESUMO -O conhecimento de informações básicas sobre a biologia de plantas daninhas pode contribuir significativamente para o desenvolvimento de estratégias para seu manejo. Emilia sonchifolia é uma espécie de ampla disseminação em todo o território brasileiro e apresenta moderada agressividade, sendo encontrada em áreas agrícolas, terrenos baldios e áreas urbanas. O presente trabalho teve como objetivo avaliar a germinação das sementes de E. sonchifolia em diferentes condições ambientais. Foram realizados quatro experimentos: combinação de quatro temperaturas (20, 25, 30 e 35 ºC) em duas condições de luz (ausência e presença); sete níveis de restrição hídrica proporcionada por PEG6000 (0,0; -0,1; -0,2; -0,4; -0,6; -0,8; e -1,0 MPa); seis níveis de estresse salino proporcionado pelo NaCl (0,0; -0,2; -0,4; -0,6; -0,8; e -1,0 MPa) e seis níveis de pH (3,0; 5,0; 6,0; 7,0; 9,0; e 11,0) em solução tamponada. A germinação das sementes de E. sonchifolia foi maximizada na presença de luz, em temperaturas constantes de 25 e 30 ºC. Houve redução da germinação em ambiente com restrição hídrica a partir de -0,1 MPa, e para estresse salino, a partir de 0,2 MPa. E. sonchifolia é sensível à variação de pH, ocorrendo maior germinação das sementes apenas em pH 6,0.Palavras-chave: falsa-serralha, temperatura, restrição hídrica, salinidade, pH.ABSTRACT -The knowledge of basic aspects of the biology of weeds can contribute significantly to the development of strategies for their handling. Emilia sonchifolia is a weed spread throughout the Brazilian territory; it presents moderate aggressiveness being found in agricultural and urban areas. This work aimed to evaluate germination of E. sonchifolia seeds in temperature conditions and brightness, stress osmotic, saline and pH of solution. Four experiments were accomplished: a) combination of four temperatures (20 ºC, 25 ºC, 30 ºC and 35 ºC) in two conditions of brightness (light absence and presence); b) seven levels of osmotic stress provided for PEG6000 (0; -0.1; -0.2; -0.4; -0.6; -0.8 and -1.0 MPa); c) six levels of saline stress provided for NaCl (0.0; -0.2; -0.4; -0.6; -0.8 and -1.0 MPa) and d) six pH levels (3.0; 5.0; 6.0; 7.0; 9.0 and 11.0) in buffer solutions. The germination of E. sonchifolia seeds was maximized in the presence of light , at constant temperatures of 25 and 30 ºC. There was reduction of germination in conditions with osmotic stress starting from -0.1 MPa and of -0.2 MPa for saline stress. E. sonchifolia is sensive to pH variation, with greater germination of seeds occurring only at pH 6.0.

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“…However, they also reported that the rate of emergence decreased with decreasing matric pressures. AYERS (1952) working on the emergence of onion seeds in soil, found both a decrease in rate and final percentage of emergence with decreasing matric pressures. HUNTER and ERICKSON (1952) found for five soil types minimum values of matric pressures of -12.7, -8.0, -6.7 and -3.5 bar necessary for emergence of corn, rice, soybeans and sugar beet seeds respectively.…”

Section: B Effect Of Soil Moisturementioning

confidence: 99%

Water, Heat, and Crop Growth

1972

Soil Science Soc of Amer J

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Seed Germination as Affected by Soil Moisture and Salinity¹

Cited by 97 publications

References 2 publications

EFFECT OF SALT STRESS ON SEED GERMINATION AND VIGOR Panicum maximum Jacq. VARIETIES TANZANIA AND MOMBASA

EFFECT OF SALT STRESS ON SEED GERMINATION AND VIGOR Panicum maximum Jacq. VARIETIES TANZANIA AND MOMBASA

Fatores ambientais sobre a germinação de Emilia sonchifolia

Water, Heat, and Crop Growth

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Seed Germination as Affected by Soil Moisture and Salinity1

Cited by 97 publications

References 2 publications

EFFECT OF SALT STRESS ON SEED GERMINATION AND VIGOR Panicum maximum Jacq. VARIETIES TANZANIA AND MOMBASA

EFFECT OF SALT STRESS ON SEED GERMINATION AND VIGOR Panicum maximum Jacq. VARIETIES TANZANIA AND MOMBASA

Fatores ambientais sobre a germinação de Emilia sonchifolia

Water, Heat, and Crop Growth

Contact Info

Product

Resources

About

Seed Germination as Affected by Soil Moisture and Salinity¹