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Reduction of ferric oxalate by cucumber leaves

Peng Xinxiang, Zhang Jinpeng, Li Mingqi

Lab of Molecular Plant Physiology,College of Biotechnology,South China Agricultural University.Guangzhou 510642,Guangdong

Abstract

Ferric reduction may play an important role in iron acquisition and utilization for the cells of plant leaves. This study revealed that ferric oxalate could serve as a better substrate for the ferric reduction by either leaf discs or the membrane-bound ferric reductase compared with the other commonly-used ferric chelates such as Fe~(III) EDTA and ferric citrate. Iron deficiency was not able to increase the ferric reduction in cucumber leaves, which usually occurs in the roots. Iron deficiency itself had no effect on oxalate content in the leaves, but bicarbonate, abundant in calcareous soil, significantly increased the leaf oxalate content.

Key words: Ferric reduction;Oxalate;Cucumber leaves

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Citing This Article：

Peng Xinxiang, Zhang Jinpeng, Li Mingqi. Reduction of ferric oxalate by cucumber leaves. Acta Physiol Sin 2001; 53 (6): (in Chinese with English abstract).