Estudos sobre a nutriçao mineral do arroz: XXVII . Fatores que influenciam a absorção radicular do fósforo pela variedade IAC-164

Malavolta, E.; Santos, A.J.R. dos; França, A.F. de; Fachinello, J.C.; Barbosa F°, M.P.

doi:10.1590/S0071-12761984000100018

Resumos

Na faixa de 15 a 240 minutos a absorção do fósforo marcado com P32 é crescente e linear. A variação na concentração externa de H2PO4 mostrou existirem duas isotermas, uma operando em baixas concentrações (Km = 6,17x10-6M) e outra correspondente a altas concentrações (Km = 1,64x10-2M). Oíon magnésio aumenta a absorção e o Cl- causa diminuição quando fornecido na concentração de 10-2m.SO4-2e Zn+2 não mostraram efeito.

Within the range of 15 to 240 minutes it was found that absorption increased in a linear fashion.By varying the external concentration of H2PO-4 from 10-7M to 10-2 M a dual pattern uptake was observed: a high affinity macnamism with a Km= 6.17 x 10-6M and a second one with low affinity (Km= 1.64 x 10-2M) . Absorption was raised when the external concentration of Mg ions varied from 10-6 to 10-4When supplied in the range of 10-6 to 10-2M the chloride salis of K and Ca rediced the absorption, the effect being traced to the CI ion. Zincsulfate (10-8to 10-4M) had no effect on phosphate absorption.

E. Malavolta^I; A.J.R. dos Santos^II; A.F. de França^II; J.C. Fachinello^II; M.P. Barbosa F°^II

^ICENA-USP

^IIEstudantes de Pós-Graduação; Disciplina LQI-860. E. S.A. "Lui z de Queiroz"

RESUMO

Na faixa de 15 a 240 minutos a absorção do fósforo marcado com P³² é crescente e linear. A variação na concentração externa de H2PO4 mostrou existirem duas isotermas, uma operando em baixas concentrações (Km = 6,17x10^-6M) e outra correspondente a altas concentrações (Km = 1,64x10^-2M). Oíon magnésio aumenta a absorção e o Cl^- causa diminuição quando fornecido na concentração de 10^-2m.SO₄^-2e Zn⁺² não mostraram efeito.

SUMMARY

Within the range of 15 to 240 minutes it was found that absorption increased in a linear fashion.By varying the external concentration of H₂PO^-4 from 10^-7M to 10^-2 M a dual pattern uptake was observed: a high affinity macnamism with a Km= 6.17 x 10^-6M and a second one with low affinity (Km= 1.64 x 10^-2M) . Absorption was raised when the external concentration of Mg ions varied from 10^-6 to 10^-4When supplied in the range of 10^-6 to 10^-2M the chloride salis of K and Ca rediced the absorption, the effect being traced to the CI ion. Zincsulfate (10^-8to 10^-4M) had no effect on phosphate absorption.

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LITERATURA CITADA

Entregue para publicação em 21/12/84.

ASHER, C.J. & J.F. LONERAGAN, 1967. Response of plants to phosphate concentration in solution culture: I. Growth and phosphorus content. Soil Science, 103(4): 225-233.
CROCOMO, O.J.; E. MALAVOLTA, 1964. The uptake of radiophosphate by barley plants as influenced by magnesium. Anais da E.S.A. "Luiz de Queiroz", 21: 44-49
EPSTEIN, E., 1975. Nutrição Mineral de Plantas Tradução e notas de E. Malavolta. Ed. da Universidade de São Paulo. 344p.
EPSTEIN, E. & C.E. HAGEN, 1952. A kinetic study of the absorption of alkali cations by barley roots. Plant Physiol 27:457-474.
EPSTEIN, E.; D.W. RAINS & O.E. ELZAM, 1963. Resolution of dual mechamism of potassium absorption by barley roots. Proc. Not. Acad. Sci 49:684-692.
FAGERIA, N.K., 1974. Kinetics of phosphate absorption by intact rice plants. Aust. J. Agric. Res 25:395 -400.
FAGERIA, N.K., 1975. Influence of potassium concentration on growth and potassium uptake by rice plants Plant and Soil, 44:
HAGEN, E.C. & H.T. HOPKINS, 1915. Ionic species in orthophosphate absorption by barley roots. Plant Physiology, 30:193-9.
HOAGLAND, D.R. & D.I. ARMON, 1950. The water culture method for growing plants without soil. Calif. Agr. Exp. Sta. Cir 347.
HOAGLAND, D.R. & T.C. BOYER, 1936. General nature of the process of salt accumulation by roots with description of experimental methods. Plant Physiol 11:471-507.
HODGES, T.K. 1973. Ion absorption by plants roots . Advances in Agronomy, 25:163-207.
HOFSTEE, B.H.J. , 1952. On the evaluation of the constants Vm and Km enzyme reactions. Science, 116 : 329-331.
LASTUVKA, Z. & J. MINAR, 1970. The relation between nutrient solution concentration and growth and ion absorption of peas (Pisun sativum L.). I. Growth of peas. Plant and Soil, 12:189-197.
LEONARD, R. & T.K. HODGES, 1973. Characterization of plasma membrane-association adenosine tri-phosphate activity of oat roots. Plant Physiology, 52:6-12.
LOURENÇO, S.; O.J. CROCOMO; I.R. NOGUEIRA & E. MALAVOLTA. Kinetic studies of Phosphorus uptake by excise roots of barley in the presence of magnesium. An. Acad. Brasil. Cienc (1968), 40(2):171-179.
MALAVOLTA, E., 1980. Elementos de Nutrição Mineral de Plantas Ed. Agron. Ceres., 251p.
MALAVOLTA, E. ; A.F. VECCHIATO; H.W. TAKAHASHI ; H.J. KLIEMANN; J.A. AZEVEDO; M.D. THOMAZI; P.J. CARVALHO GENU & S.R.F. LEÃO, 1982. Estudos sobre a nutrição mineral do arroz. XVI. Absorção radicular e foliar do rádio fósforo por diversas variedades. Anais E.S.Agr. "Luiz de Queiroz", vol. XXXIX, p.373-409.
MALAVOLTA, E. et alii, 1977. Estudos sobre nutrição mineral de sorgo granífero. VI. Absorção de fosfato por raízes destacadas de plantas de três variedades comerciais. Anais da E.S.A. "Luiz de Queiroz", 34: 383-406.
MENGEL, K. & E.A. KIRKBY, 1979. Principies of Plant Nutrition. 2nd Edition, International Potash Institute, Berne, Switzerland, 593p.
NISSEN, P.; N.K. FAGERIA; A.J. RAYAR; M.M. HASSAN & T.V. HAI, 1980. Multiphasic accumulation of nutrient by plants. Physiologia Plantarum. 49:222-240.
PHILLIPS, J.W.; D.E. FAKER & C.O. CLAGETT, 1971. Kinetics of P absorption by excised roots and leaves of corn hybrids. Agronomy Journal, Madison. Wisconsin, 63(4): 517-520.

Estudos sobre a nutriçao mineral do arroz. XXVII . Fatores que influenciam a absorção radicular do fósforo pela variedade IAC-164

Studies on the mineral nutrition of the rice plant. factors which affect the uptake of phosphate ions by excised roots of the variety IAC-164.

Datas de Publicação

Publicação nesta coleção
16 Maio 2011
Data do Fascículo
1984

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

[1] ASHER, C.J. & J.F. LONERAGAN, 1967. Response of plants to phosphate concentration in solution culture: I. Growth and phosphorus content. Soil Science, 103(4): 225-233.

[2] CROCOMO, O.J.; E. MALAVOLTA, 1964. The uptake of radiophosphate by barley plants as influenced by magnesium. Anais da E.S.A. "Luiz de Queiroz", 21: 44-49

[3] EPSTEIN, E., 1975. Nutrição Mineral de Plantas Tradução e notas de E. Malavolta. Ed. da Universidade de São Paulo. 344p.

[4] EPSTEIN, E. & C.E. HAGEN, 1952. A kinetic study of the absorption of alkali cations by barley roots. Plant Physiol 27:457-474.

[5] EPSTEIN, E.; D.W. RAINS & O.E. ELZAM, 1963. Resolution of dual mechamism of potassium absorption by barley roots. Proc. Not. Acad. Sci 49:684-692.

[6] FAGERIA, N.K., 1974. Kinetics of phosphate absorption by intact rice plants. Aust. J. Agric. Res 25:395 -400.

[7] FAGERIA, N.K., 1975. Influence of potassium concentration on growth and potassium uptake by rice plants Plant and Soil, 44:

[8] HAGEN, E.C. & H.T. HOPKINS, 1915. Ionic species in orthophosphate absorption by barley roots. Plant Physiology, 30:193-9.

[9] HOAGLAND, D.R. & D.I. ARMON, 1950. The water culture method for growing plants without soil. Calif. Agr. Exp. Sta. Cir 347.

[10] HOAGLAND, D.R. & T.C. BOYER, 1936. General nature of the process of salt accumulation by roots with description of experimental methods. Plant Physiol 11:471-507.

[11] HODGES, T.K. 1973. Ion absorption by plants roots . Advances in Agronomy, 25:163-207.

[12] HOFSTEE, B.H.J. , 1952. On the evaluation of the constants Vm and Km enzyme reactions. Science, 116 : 329-331.

[13] LASTUVKA, Z. & J. MINAR, 1970. The relation between nutrient solution concentration and growth and ion absorption of peas (Pisun sativum L.). I. Growth of peas. Plant and Soil, 12:189-197.

[14] LEONARD, R. & T.K. HODGES, 1973. Characterization of plasma membrane-association adenosine tri-phosphate activity of oat roots. Plant Physiology, 52:6-12.

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

[16] MALAVOLTA, E., 1980. Elementos de Nutrição Mineral de Plantas Ed. Agron. Ceres., 251p.

[17] MALAVOLTA, E. ; A.F. VECCHIATO; H.W. TAKAHASHI ; H.J. KLIEMANN; J.A. AZEVEDO; M.D. THOMAZI; P.J. CARVALHO GENU & S.R.F. LEÃO, 1982. Estudos sobre a nutrição mineral do arroz. XVI. Absorção radicular e foliar do rádio fósforo por diversas variedades. Anais E.S.Agr. "Luiz de Queiroz", vol. XXXIX, p.373-409.

[18] MALAVOLTA, E. et alii, 1977. Estudos sobre nutrição mineral de sorgo granífero. VI. Absorção de fosfato por raízes destacadas de plantas de três variedades comerciais. Anais da E.S.A. "Luiz de Queiroz", 34: 383-406.

[19] MENGEL, K. & E.A. KIRKBY, 1979. Principies of Plant Nutrition. 2nd Edition, International Potash Institute, Berne, Switzerland, 593p.

[20] NISSEN, P.; N.K. FAGERIA; A.J. RAYAR; M.M. HASSAN & T.V. HAI, 1980. Multiphasic accumulation of nutrient by plants. Physiologia Plantarum. 49:222-240.

[21] PHILLIPS, J.W.; D.E. FAKER & C.O. CLAGETT, 1971. Kinetics of P absorption by excised roots and leaves of corn hybrids. Agronomy Journal, Madison. Wisconsin, 63(4): 517-520.

Brasil

Brasil

Estudos sobre a nutriçao mineral do arroz: XXVII . Fatores que influenciam a absorção radicular do fósforo pela variedade IAC-164

Studies on the mineral nutrition of the rice plant: Factors which affect the uptake of phosphate ions by excised roots of the variety IAC-164

Resumos

Estudos sobre a nutriçao mineral do arroz. XXVII . Fatores que influenciam a absorção radicular do fósforo pela variedade IAC-164

Datas de Publicação