Efeito de reguladores de crescimento no potencial osmótico de tomateiro (Lycopersicon esculentum Mill. cv. Angela)

Castro, Paulo R.C.; Duarte, Maria L.R.; Machado, Carlos C.; Castro, Carlos; Brito, Antonio S.

doi:10.1590/S0071-12761977000100027

Resumos

A importância do estudo do potencial osmótico das plantas deve-se ao fato deste parâmetro ser considerado o principal componente do potencial hídrico, refletindo o equilíbrio de água na planta. Determinou-se o potencial osmótico foliar do tomateiro (Lycopersicon esculentum Mill. cv. "Angela") através de osmômetro de precisão. As plantas haviam sido tratadas com cloreto de (2-cloroetil) trimetilamônio (CCC) 2000 ppm, ácido succínico-2,2-dimetilhidrazida (Alar) 3000 ppm e giberelato de potássio (Gibrel) 100 ppm, além do controle. Verificou-se que o Gibrel promoveu uma redução no potencial osmótico; sendo que Alar provocou flutuações no potencial do tomateiro "Angela". O CCC causou maior equilíbrio no potencial osmótico foliar do tomateiro. Observou-se que as folhas da cultivar "Angela'' mostraram potencial osmótico mais alto pela manhã com relação ao período da tarde.

This research deals with the effects of exogenous growth regulators on leaf osmotic potential of tomato cultivar "Angela". To study the influence of growth substances on osmotic potentia, (2-chloroethyl) trimethylammonium chloride (CCC) at concentration of 2,000 ppm, succinic acid-2,2-dirnethylhydrazide (Alar) (3,000 ppm), and potassium gibberellate (Gibrel) (100 ppm) were applied. The leaf osmotic potential established everyday during six days showed that plants treated with Gibrel presented lower (negative) osmotic potential. CCC promoted better equilibrium in the osmotic potential of tomato plants. Leaves of tomato cultivar "Angela" presented higher osmotic potential in the morning in relation to leaves collected in the afternoon.

Paulo R.C. Castro^I; Maria L.R. Duarte^II; Carlos C. Machado^II; Carlos Castro^II; Antonio S. Brito^II

^IDepartamento de Botânica. E.S.A. "Luiz de Queiroz" - USP

^IICurso de Pós-Graduaçao da E.S.A. "Luiz de Queiroz" - USP

RESUMO

A importância do estudo do potencial osmótico das plantas deve-se ao fato deste parâmetro ser considerado o principal componente do potencial hídrico, refletindo o equilíbrio de água na planta. Determinou-se o potencial osmótico foliar do tomateiro (Lycopersicon esculentum Mill. cv. "Angela") através de osmômetro de precisão. As plantas haviam sido tratadas com cloreto de (2-cloroetil) trimetilamônio (CCC) 2000 ppm, ácido succínico-2,2-dimetilhidrazida (Alar) 3000 ppm e giberelato de potássio (Gibrel) 100 ppm, além do controle. Verificou-se que o Gibrel promoveu uma redução no potencial osmótico; sendo que Alar provocou flutuações no potencial do tomateiro "Angela". O CCC causou maior equilíbrio no potencial osmótico foliar do tomateiro. Observou-se que as folhas da cultivar "Angela'' mostraram potencial osmótico mais alto pela manhã com relação ao período da tarde.

SUMMARY

This research deals with the effects of exogenous growth regulators on leaf osmotic potential of tomato cultivar "Angela". To study the influence of growth substances on osmotic potentia, (2-chloroethyl) trimethylammonium chloride (CCC) at concentration of 2,000 ppm, succinic acid-2,2-dirnethylhydrazide (Alar) (3,000 ppm), and potassium gibberellate (Gibrel) (100 ppm) were applied. The leaf osmotic potential established everyday during six days showed that plants treated with Gibrel presented lower (negative) osmotic potential. CCC promoted better equilibrium in the osmotic potential of tomato plants. Leaves of tomato cultivar "Angela" presented higher osmotic potential in the morning in relation to leaves collected in the afternoon.

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LITERATURA CITADA

Entregue para publicação em 7-12-1977.

ABELE, J.E. 1963. The physical background to freezing point osmometry and its medical - biological applications. Amer. J. Med. Electronics 2:32-41.
CASTRO, P.R.C.; JORGE, A.P. 1974. Efeito do cloreto de 2-cloroetil trimetilamônio na transpiracão do feijoeiro (Phasieolus vulgaris L.). Supl. Ciência e Cultura 26: 545.
CINCOVIC, T. 1966. Results of studies on the water relations of apple leaves relative to their position in the crown. Zborn. Rod. Polp. Tox. Breagad. 14: 1-6.
COLE, D.F.; DOBRENZ, A.K.; MASSENGALE, M.A. 1971. Effect of growth regulator and antitranspirant chemicals on water requirement and growth components of alfalfa (Medicago sativa L). Crop Science 11: 582-584.
FILIPOV, L.A. 1964. The formation of drought resistance properties of apple leaves during growth under the influence of external conditions. Fisiologiya Rastenii 11: 529-531.
KULL, U. 1971. Effect of CCC on strange behaviour of vegetative plant parts. Ber. Dent. Ges. 84: 299-308.
LEE, K.C.; CAMPBELL, R.W.; PAULSEN, G.M. 1974. Effects of drought stress and succinic acid-2,2-dimethylhydrazide treatment on water relations and photosynthesis in pea seedlings. Crop Science 14: 279-282.
MISHRA, D.; PRADHAN, G.C. 1972. Effect of transpiration-reducing chemicals on growth, flowering and stomatal opening of tomato plants. Plant Physiol. 50: 271-274.
SINGH, K.; YOUNG, J.O. 1971. Effect of 2-chloroethyl trimethylammonium chloride on growth behaviour and transpiration related to tomato fruit cracking. J. Nkvv. Res. J. 5: 22-27.
SOLOMONOVSKII, L.Y. 1972. Effect of CCC on indexes of the water system and cold hardiness of tomatoes. Isv. Sib. Otor. Akad. Nank. 1: 57-60.
TAL, M.; IMBER, D. 1971. Abnormal stomatal behaviour and hormonal imbalance in Flacca, a wilty mutant of tomato. II. Hormonal effects on the water status in the plant! Plant Physiol. 47: 849-850.
WALTER, H.; VAN STADEN, J. 1965. Uberdic Jahreskurven des osmotischen Werts bei insigen Hortlanbarten des Kaplandes. J.S. Afs. Bot. 31: 225-236.

**Efeito de reguladores de crescimento no potencial osmótico de tomateiro (Lycopersicon Esculentum mill. cv. Angela)**

Effects of growth regulators on osmotic potential of tomato (Lycopersicon esculentum cv. Angela)

Datas de Publicação

Publicação nesta coleção
17 Maio 2012
Data do Fascículo
1977

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

[1] ABELE, J.E. 1963. The physical background to freezing point osmometry and its medical - biological applications. Amer. J. Med. Electronics 2:32-41.

[2] CASTRO, P.R.C.; JORGE, A.P. 1974. Efeito do cloreto de 2-cloroetil trimetilamônio na transpiracão do feijoeiro (Phasieolus vulgaris L.). Supl. Ciência e Cultura 26: 545.

[3] CINCOVIC, T. 1966. Results of studies on the water relations of apple leaves relative to their position in the crown. Zborn. Rod. Polp. Tox. Breagad. 14: 1-6.

[4] COLE, D.F.; DOBRENZ, A.K.; MASSENGALE, M.A. 1971. Effect of growth regulator and antitranspirant chemicals on water requirement and growth components of alfalfa (Medicago sativa L). Crop Science 11: 582-584.

[5] FILIPOV, L.A. 1964. The formation of drought resistance properties of apple leaves during growth under the influence of external conditions. Fisiologiya Rastenii 11: 529-531.

[6] KULL, U. 1971. Effect of CCC on strange behaviour of vegetative plant parts. Ber. Dent. Ges. 84: 299-308.

[7] LEE, K.C.; CAMPBELL, R.W.; PAULSEN, G.M. 1974. Effects of drought stress and succinic acid-2,2-dimethylhydrazide treatment on water relations and photosynthesis in pea seedlings. Crop Science 14: 279-282.

[8] MISHRA, D.; PRADHAN, G.C. 1972. Effect of transpiration-reducing chemicals on growth, flowering and stomatal opening of tomato plants. Plant Physiol. 50: 271-274.

[9] SINGH, K.; YOUNG, J.O. 1971. Effect of 2-chloroethyl trimethylammonium chloride on growth behaviour and transpiration related to tomato fruit cracking. J. Nkvv. Res. J. 5: 22-27.

[10] SOLOMONOVSKII, L.Y. 1972. Effect of CCC on indexes of the water system and cold hardiness of tomatoes. Isv. Sib. Otor. Akad. Nank. 1: 57-60.

[11] TAL, M.; IMBER, D. 1971. Abnormal stomatal behaviour and hormonal imbalance in Flacca, a wilty mutant of tomato. II. Hormonal effects on the water status in the plant! Plant Physiol. 47: 849-850.

[12] WALTER, H.; VAN STADEN, J. 1965. Uberdic Jahreskurven des osmotischen Werts bei insigen Hortlanbarten des Kaplandes. J.S. Afs. Bot. 31: 225-236.

Brasil

Brasil

Efeito de reguladores de crescimento no potencial osmótico de tomateiro (Lycopersicon esculentum Mill. cv. Angela)

Effects of growth regulators on osmotic potential of tomato (Lycopersicon esculentum cv. Angela)

Resumos

**Efeito de reguladores de crescimento no potencial osmótico de tomateiro (Lycopersicon Esculentum mill. cv. Angela)**

Datas de Publicação