Destacadas de soja (Glycine max (L.) merril absorção de cálcio e fósforo por raízes var. IAC-2)

Malavolta, E.; Souza, A.F.; Tunin, G.S.; Dantas, J.P.; Aquino, B.F.; Foloni, L.L.; Moreira, E.G.S.; Lima, F.A.M.; Chaves, I.; Kefalás, J.F.; Ferreira, J.F.; Cavalcanti, G. A.; Mota, F.O.B.; Valle, E.C.

doi:10.1590/S0071-12761976000100047

Resumos

A absorção do cálcio e do fósforo por raízes destacadas da soja var. IAC-2 foi estudada com ajuda de traçadores. Foram verificados os efeitos da concentração iônica externa do tempo, do pH, da temperatura, da aeração e de venenos respiratórios. Os dados sugerem que a absorção do cálcio tenha se dado passivamente, sendo ativa a do fósforo. A absorção cresceu com o pH e a temperatura. Os valores das constantes de Michaelis encontrados concordam com os da literatura.

This paper deals with experiments designed to study the influence of several external factors on the uptake both of Ca+² and H2PO4 - by excised soybean roots. The main conclusions are as follows: 1) Ca uptake does not follow the usual Michaelian kynetics, the evidence suggesting the operation of passive mechanism; 2) R uptake is metabolic, a single mechanism being in operation; 3) pH has a strong effect both on Ca and R absorption; 4) The use both of lower temperature (O0C) and of respiratory poisons (cyanide) inibited phosphate uptake but had no effect on calcium absorption. 5) The obsorption of Ca+2 was lowered in the presence of Mg+² but not in that of K+; nitrate ions had no detrimental or sinergistic offect on the absorption of phosphate.

Destacadas de soja (Glycine max (L.) merril absorção de cálcio e fósforo por raízes var. IAC-2)^*

Absorption of calcium and phosphorus by excised soybean roots, var. IAC-2

E. Malavolta^I; A.F. Souza^II; G.S. Tunin^II; J.P. Dantas^II; B.F. Aquino^II; L.L. Foloni^II; E.G.S. Moreira^II; F.A.M. Lima^II; I. Chaves^II; J.F. Kefalás^II; J.F. Ferreira^II; G. A. Cavalcanti^II; F.O.B. Mota^II; E.C. Valle^II

^IDepartamento de Química e CENA, ESALQ, USP, Piracicaba, SP

^IIEstudantes de pós graduação em Solos e Nutrição de Plantas, ESALQ

RESUMO

A absorção do cálcio e do fósforo por raízes destacadas da soja var. IAC-2 foi estudada com ajuda de traçadores. Foram verificados os efeitos da concentração iônica externa do tempo, do pH, da temperatura, da aeração e de venenos respiratórios. Os dados sugerem que a absorção do cálcio tenha se dado passivamente, sendo ativa a do fósforo. A absorção cresceu com o pH e a temperatura. Os valores das constantes de Michaelis encontrados concordam com os da literatura.

SUMMARY

This paper deals with experiments designed to study the influence of several external factors on the uptake both of Ca+² and H₂PO₄ - by excised soybean roots.

The main conclusions are as follows:

1) Ca uptake does not follow the usual Michaelian kynetics, the evidence suggesting the operation of passive mechanism;

2) P uptake is metabolic, a single mechanism being in operation;

3) pH has a strong effect both on Ca and R absorption;

4) The use both of lower temperature (O⁰C) and of respiratory poisons (cyanide) inibited phosphate uptake but had no effect on calcium absorption.

5) The obsorption of Ca⁺² was lowered in the presence of Mg+² but not in that of K+; nitrate ions had no detrimental or sinergistic offect on the absorption of phosphate.

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LITERATURA CITADA

Entregue para publicação em 16/12/1976.

Referências bibliográficas

ANDERSON, W.P.; D.L. HENDRIX & N. HIGINBOTHAM. 1974 - The effect of cyanide and carbon monoxide on the electrical potential and resistance of cell membranes. Plant Physiol. 54:712-716.
CRUZ, A.D. 1973 - Absorção do cálcio por tecidos da folha do cafeeiro (Coffea arabica L., var. Mundo Novo). Tese de Doutoramento, ESALQ, Piracicaba.
EPSTEIN, E. 1975 - Nutrição Mineral das Plantas - Princípios e Perspectivas. Trad. e notas de E. Malavolta. Livros Técnicos e Científicos Editora S.A. e Editora da LISP, São Paulo.
EPSTEIN, E. & J.E. LEGGET. 1954 - The absorption of alkaline earth cations by barley roots: kinetics and mechanism. Amer. J. Bot. 41:785-791.
FRIED, M. & H. BROESHART. 1967 - The Soil Plant System. Academic Press. Nova Iorque e Londres.
GAUCH, H. 1972 - Inorganic Plant Nutrition. Dowden, Hutchinson & Ross, Inc. Stroudsburg, P.
HAGEN, C.E. & H.T. HOPKINS. 1955 - Ionic species in orthophosphate absorption by barley roots. Plant Phisiol. 30:192-199.
HANDLEY, R. & R. OVERSTREET. 1961 - Uptake of calcium and chlorine in roots of Zea mays. Plant Physiol. 36:766-769.
HELLER, R. 1974 - L'Absorption Minérale ches les végétaux. Masson & Cie., Paris.
HEWITT, EJ. & J.A. SMITH, 1974 - Plant Mineral Nutrition. The English Universities Press Ltd., Londres.
HIGINBOTHAM, N. 1973 - The mineral absorption process in plants. The Bot. Rev. 39(1) :15-69.
HODGES, T.K. 1973 - Ion absorption by plant roots. Adv. Agron. 25:163-207.
LEGGET, J.R. & W.A. GILBERT. 1967. - Localization of the Ca mediated apparent ion seletivity in the cross sectional volume by soybean roots. Plant Physiol. 42:1658-1664.
LEGGETT, J.E., R.A. GALLOWAY & H.C. GAUCH. 1965 - Calcium activation of orthophosphate absorption by barley roots. Plant Physiol. 40 :897-902.
LOURENÇO, S., O.J. CROCOMO, I.R. NOGUEIRA & E. MALAVOLTA. 1968 - Kinetic studies of phosphorus uptake by exccesed roots of barley in the presence of magnesium. An. Acad. Bras. Ciênc. 40(2): 171-179.
LUNDEGARD, H. 1939 - An electro-chemical theory of salt absorption and respiration. Nature. 143: 203.
MALAVOLTA, E. 1975 - Práticas de Nutrição Mineral de Plantas. Postila mimeo._r Piracicaba.
MENZEL, R.G. & W.R. HEALD. 1955 - Distribution of potassium, rubidium, caesium calcium and strontion within plants grown in nutriente solution. Soil Sci. 80 :287-293.
MOORE, D.P., L. JACOBSON & R. OVERSTREET. 1961 - Uptake of calcium by excised barley roots. Plant. Physiol. 36:53-57.
NISSEN, P. 1974 - Uptake mechanisms inorganic and organic. Ann. Rev. Plant Physiol. 25 :53-79.
ROBERTSON, R.N. & N.J. WILKINS. 1948 - Studies on the metabolism of plant cells. VII. The quantitative relation between salt accumulation and salt respiration. Aust. J. Sci. Res, B. Biol. Sci. 1:17-37.
SALSAC, L. 1966 - Absorption du calcium dans les racines de Lupin Jaune et de Féverole, CR. Acad. Sci., Paris. 262:2462-2465.
SALSAC, L. 1969 - Caracteres particuliers de l'absorption du calcium. Bull. Soc. Franc. Physiol, vég. 15:213-236.
STEWARD, F.C. & J.F. SUTCLIFFE. 1959 - Plants in relation to inorganic salts. Plant Physiology. II, pp. 253-478, Academic Press, Nova Iorque e Londres.

*

Com ajuda da FAPESP, CNEN, CAPES e BNDE.

Datas de Publicação

Publicação nesta coleção
29 Maio 2012
Data do Fascículo
1976

Histórico

Recebido
16 Dez 1976

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

[1] ANDERSON, W.P.; D.L. HENDRIX & N. HIGINBOTHAM. 1974 - The effect of cyanide and carbon monoxide on the electrical potential and resistance of cell membranes. Plant Physiol. 54:712-716.

[2] CRUZ, A.D. 1973 - Absorção do cálcio por tecidos da folha do cafeeiro (Coffea arabica L., var. Mundo Novo). Tese de Doutoramento, ESALQ, Piracicaba.

[3] EPSTEIN, E. 1975 - Nutrição Mineral das Plantas - Princípios e Perspectivas. Trad. e notas de E. Malavolta. Livros Técnicos e Científicos Editora S.A. e Editora da LISP, São Paulo.

[4] EPSTEIN, E. & J.E. LEGGET. 1954 - The absorption of alkaline earth cations by barley roots: kinetics and mechanism. Amer. J. Bot. 41:785-791.

[5] FRIED, M. & H. BROESHART. 1967 - The Soil Plant System. Academic Press. Nova Iorque e Londres.

[6] GAUCH, H. 1972 - Inorganic Plant Nutrition. Dowden, Hutchinson & Ross, Inc. Stroudsburg, P.

[7] HAGEN, C.E. & H.T. HOPKINS. 1955 - Ionic species in orthophosphate absorption by barley roots. Plant Phisiol. 30:192-199.

[8] HANDLEY, R. & R. OVERSTREET. 1961 - Uptake of calcium and chlorine in roots of Zea mays. Plant Physiol. 36:766-769.

[9] HELLER, R. 1974 - L'Absorption Minérale ches les végétaux. Masson & Cie., Paris.

[10] HEWITT, EJ. & J.A. SMITH, 1974 - Plant Mineral Nutrition. The English Universities Press Ltd., Londres.

[11] HIGINBOTHAM, N. 1973 - The mineral absorption process in plants. The Bot. Rev. 39(1) :15-69.

[12] HODGES, T.K. 1973 - Ion absorption by plant roots. Adv. Agron. 25:163-207.

[13] LEGGET, J.R. & W.A. GILBERT. 1967. - Localization of the Ca mediated apparent ion seletivity in the cross sectional volume by soybean roots. Plant Physiol. 42:1658-1664.

[14] LEGGETT, J.E., R.A. GALLOWAY & H.C. GAUCH. 1965 - Calcium activation of orthophosphate absorption by barley roots. Plant Physiol. 40 :897-902.

[15] LOURENÇO, S., O.J. CROCOMO, I.R. NOGUEIRA & E. MALAVOLTA. 1968 - Kinetic studies of phosphorus uptake by exccesed roots of barley in the presence of magnesium. An. Acad. Bras. Ciênc. 40(2): 171-179.

[16] LUNDEGARD, H. 1939 - An electro-chemical theory of salt absorption and respiration. Nature. 143: 203.

[17] MALAVOLTA, E. 1975 - Práticas de Nutrição Mineral de Plantas. Postila mimeo._r Piracicaba.

[18] MENZEL, R.G. & W.R. HEALD. 1955 - Distribution of potassium, rubidium, caesium calcium and strontion within plants grown in nutriente solution. Soil Sci. 80 :287-293.

[19] MOORE, D.P., L. JACOBSON & R. OVERSTREET. 1961 - Uptake of calcium by excised barley roots. Plant. Physiol. 36:53-57.

[20] NISSEN, P. 1974 - Uptake mechanisms inorganic and organic. Ann. Rev. Plant Physiol. 25 :53-79.

[21] ROBERTSON, R.N. & N.J. WILKINS. 1948 - Studies on the metabolism of plant cells. VII. The quantitative relation between salt accumulation and salt respiration. Aust. J. Sci. Res, B. Biol. Sci. 1:17-37.

[22] SALSAC, L. 1966 - Absorption du calcium dans les racines de Lupin Jaune et de Féverole, CR. Acad. Sci., Paris. 262:2462-2465.

[23] SALSAC, L. 1969 - Caracteres particuliers de l'absorption du calcium. Bull. Soc. Franc. Physiol, vég. 15:213-236.

[24] STEWARD, F.C. & J.F. SUTCLIFFE. 1959 - Plants in relation to inorganic salts. Plant Physiology. II, pp. 253-478, Academic Press, Nova Iorque e Londres.