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Ferrous and ferric iron ratio in normal and chlorotic bean plants (Vicia faba L.)
Author(s) -
Balba A. Monem,
Osman A. Z.,
Ghatas N. K.
Publication year - 1980
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19801430304
Subject(s) - chlorosis , ferrous , vicia faba , chemistry , horticulture , ferric , iron deficiency , botany , biology , inorganic chemistry , anemia , medicine , organic chemistry
The objective of this study was to determine the ratio and amount of Fe II and Fe III iron in different parts of 20 and 40 day old bean plants grown in pots under normal and HCO − 3 ‐treatment. The Fe II and Fe III iron determination was carried out by a modification of a method described by Vogel (1969). The Fe II and Fe III concentrations in the plant varied according to its age, the plant part, the order of leaves and HCO − 3 ‐treatment. At the second sampling date, the lower total iron content in the lower leaf particularly under the HCO − 3 ‐treatment suggests that the supply of iron from the roots was restricted. The iron content of the different leaves was almost evenly divided into Fe II and Fe III at the first date. At the second date, most of the iron in the bud leaf was present as Fe II. Under HCO − 3 ‐treatment the Fe II content of the bud leaf and the flower was similar as in the corresponding parts of the normal green plants whereas the Fe III content was considerably lowered in these plant parts as result of the HCO − 3 ‐treatment. The results indicate a substantial retranslocation of iron from older to younger leaves and a higher Fe II/Fe III ratio in flowers and bud leaves particularly under HCO − 3 ‐induced chlorosis.