50
HOFFMANN, B.; PLÄNKER, R.; MENGEL, K. Measurements of pH in the apoplast of
sunflower leaves by means of fluorescence. Physiologia Plantarum, v. 84, p. 146-
153, 1992.
HUANG, C.; BARKER, S.J.; LANGRIDGE, P.; SMITH, F.W.; GRAHAM, R.D. Zinc
deficiency up-regulates expression of high-affinity phosphate transporter genes in
both phosphate-sufficient and –deficient barley roots. Plant Physiolgy, v. 124, p.
415-422, 2000.
HUGHES, D. F.; JOLLEY, V. D.; BROWN, J. C. Role of potassium in the iron-stress
response mechanism of iron-efficient oat. Soil and Science, v. 56, n.1, p. 830-835,
1992.
JAFFE, E.K.; SHAFINAZ, A.; MITCHELL, I.A.; TAYLOR, K.M.; VOLIN, M.;
MARKHAM, G.D. Characterization of the role of the stimulatory magnesium of
Escherichia coli porphobilinogen synthase. Biochemistry, v. 34, p. 244-251, 1995.
JAFFE, E.K. Porphobilinogen synthase, the first source of heme’s assymmetry.
Journal of Bioenergetics Biomembranes, v. 27, p. 169-179, 1995.
JAFFE, E.K.; KERVINEN, J.; DUNBRACK, Jr.; LITWIN, S.; MARTINS, J.;
SCARROW, R.C.; VOLIN, M.; YEUNG, A.T.; YONN, E. Porphobilinogen synthase
from pea: Expression from an artificial gene, kinetic characterization, and novel
implications for subunit interactions. Biochemistry, v. 39, p. 9018-9029, 2000.
JOLLEY, V.D.; BROWN, J.C.; BLAYLOCK, M.J.; CAMP, S.D. A role for potassium in
the use of iron by plants. Journal of Plant Nutrition, v. 11, p. 1159-1175, 1988.
JUNGK, A.; SEELING, B.; GERKE, J. Mobilization of different phosphate fractions in
the rhizosphere. Plant and Soil, v.155/56, p. 91-94, 1993.
KOSEGARTEN, H.U.; WILSON, G.H.; ESCH, A. The effect of nitrate nutrition in iron
chlorosis and leaf growth in sunflower (Helianthus annuus). European Journal of
Agronomy, v. 8, p. 283-292, 1998.
KOSEGARTEN, H.U.; HOFFMANNN, B.; MENGEL, K. Apoplastic pH Fe
3+
reduction
in intact sunflower leaves. Plant Physiology, v. 121, p. 1069-1079, 1999.
KRAMER, D.; ROMHELD, V.; LANDSBERG, E.C.; MARSCHNER, H. Induction of
transfer-cell formation by iron deficiency in the epidermis of Helianthus annuus L.
Planta, v.147, p.335-339, 1980.
LANDSBERG, E.C. Transfer cell formation in the root epidermis: a prerequisite for
iron-efficiency. Journal of Plant Nutrition, v.5, p. 415-432, 1982.
LIU, C.; MUCHHAL, M.S.; UTHAPPA, M.; KONONOWICZ, A.K.; RAGHOTHAMA,
K.G. Tomato phosphate transporter genes are differentially regulated in plant tissues
by phosphorus. Plant Physiology, v. 116, p. 91-99, 1998.