Resumos
Verificou-se o efeito do cloreto de (2-cloroetil) trimetilamônio, quando aplicado em pulverização das plântulas, no desenvolvimento do algodoeiro cultivar 'IAC-RM3' , em condições de casa-de-vegetação. Estudaram-se as concentrações de 0, 20, 200 e 2000 ppm do retardador de crescimento; sendo que os tratamentos diminuíram a altura e o incremento percentual da mesma, com relação ao controle. Pela análise de crescimento verificou-se que a TAL, a TCR e a RAF apresentaram valores decrescentes com relação ao aumento da concentração do regulador de crescimento aplicado.
Seedlings of cotton were treated 15 days after germination, with (2-chloroethyl) trimethylammonium chloride (CCC) at concentrations of 20, 200 and 2,000 ppm and the check to verify the effect of the compound on the growth of the plant. The experiment was done under greenhouse conditions in 1974. The main proposal of this work is to study the variation of plant height, percentual plani variation height, net assimilation rate, relative growth rate and the leaf area ratio with application of CCC. The growth regulator promotes decrease in plant height and in percentual plant variation height, 6 and 12 days after application of CCC. CCC at concentration of 2,000 ppm causes, 12 days after spray, the inferior heights and fewer percentual variation heights in cotton plants. Application of CCC at concentrations of 20, 200 and 2,000 ppm, promotes proportional diminutions in the net assimilation rate, relative growth rate and in the leaf area ratio in relation to check.
Paulo R. C. CastroI; Valdir A. IukiII; Maurício SousaII; Nelson VentorimII; Hugo KuniyukiII; Francisco A. RolimII
IDepartamento de Botânica, E.S.A. "Luiz de Queiroz"/USP
IICurso de Pós-Graduação, E.S.A. "Luiz de Queiroz"/USP
RESUMO
Verificou-se o efeito do cloreto de (2-cloroetil) trimetilamônio, quando aplicado em pulverização das plântulas, no desenvolvimento do algodoeiro cultivar 'IAC-RM3' , em condições de casa-de-vegetação.
Estudaram-se as concentrações de 0, 20, 200 e 2000 ppm do retardador de crescimento; sendo que os tratamentos diminuíram a altura e o incremento percentual da mesma, com relação ao controle.
Pela análise de crescimento verificou-se que a TAL, a TCR e a RAF apresentaram valores decrescentes com relação ao aumento da concentração do regulador de crescimento aplicado.
SUMMARY
Seedlings of cotton were treated 15 days after germination, with (2-chloroethyl) trimethylammonium chloride (CCC) at concentrations of 20, 200 and 2,000 ppm and the check to verify the effect of the compound on the growth of the plant. The experiment was done under greenhouse conditions in 1974.
The main proposal of this work is to study the variation of plant height, percentual plani variation height, net assimilation rate, relative growth rate and the leaf area ratio with application of CCC.
The growth regulator promotes decrease in plant height and in percentual plant variation height, 6 and 12 days after application of CCC.
CCC at concentration of 2,000 ppm causes, 12 days after spray, the inferior heights and fewer percentual variation heights in cotton plants.
Application of CCC at concentrations of 20, 200 and 2,000 ppm, promotes proportional diminutions in the net assimilation rate, relative growth rate and in the leaf area ratio in relation to check.
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LITERATURA CITADA
Entregue para publicação em 05/06/1975.
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- WITTWER, S.H. & TOLBERT, N.E., 1960. (2-chloroethyl) trimethylammonium chloride and related compounds as plant growth substances. III: Effect on growth and flowering of the tomato. Amer. Jour. Bot., 47: 560-565.
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Efeitos do ccc no desenvolvimento do algodoeiro (Gossypium hirsutum L. cv. 'IAC-RM3')
Datas de Publicação
-
Publicação nesta coleção
30 Maio 2012 -
Data do Fascículo
1975
