Premium
Pénétration et migration du 59 Fe appliqué sur les feuilles de Maïs; effet du dimáthylsulfoxyde
Author(s) -
CHAMEL A.
Publication year - 1972
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1972.tb03562.x
Subject(s) - sulfate , chemistry , ferrous , nitrate , ferric , solubility , relative humidity , nuclear chemistry , ferric ion , solvent , inorganic chemistry , biochemistry , physics , organic chemistry , thermodynamics
The uptake and translocation of 59 Fe applied to leaves of Zea mays L. is studied with special reference to the effect of dimethylsulfoxide (DMSO). 59 Fe is deposited on corn leaves as droplets of solution of ferrous sulfate or ferric nitrate (1 m M . The uptake of 59 Fe is affected by the associated anion; the penetration is more important with the nitrate than with the sulfate. The translocation of 59 Fe from the treated part during 24 hours is very low in all the experiments. The exsorption of 59 Fe taken up, from the site of application in different solutions (FeSO 4 , 7H 2 O; EDTA Na) concerns only a low percentage of 59 Fe present in the treated part. DMSO (0.5 and 1 %) increases the uptake but not the translocation of 59 Fe applied as sulfate; it seems to have no effect when iron is applied as nitrate. The increase during 24 hours reaches between 32 % and 53 % in seven experiments with sulfate. The effect also appears in an experiment conducted during four weeks, with several applications of ferrous sulfate during this time. This effect of DMSO is discussed: it is mainly explained by the great hygroscopicity of this solvent, therefore the effect would in part depend on the solubility of salts in concentrated DMSO and of the climatic conditions: relative humidity and temperature of the air.