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Mechanism of manganese toxicity induced by P-or Fe-deficiency in Lupinus albus L.

Lu Ping, Zhang Fusuo

Beijing Agricultural University. Beijing 100094

Abstract

Under P-or Fe-deficiency stress lupin plant formed proteoid root, the reducing ability of root in the rhizosphere increased markedly. Compared with the control plants, the Fe (III)-reducing ability of the root in P-and Fe-deficient plants increased 2.1 and 3.5 times, respectively. The peak of reducing ability of root induced by P-deficiency appeared at different stage of growth from that induced by Fe-deficiency. The position of the zone with increased reducing ability on the root apex was also different. In P-deficient plants, proteoid roots had much higher reducing ability, but in Fe-deficient plant, apical zones also had higher reducing ability.

Key words: White lupin;P-deficiencey;Fe-deficiency;Root reducing ability;Proteoid root;Mn-toxicity

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Citing This Article：

Lu Ping, Zhang Fusuo. Mechanism of manganese toxicity induced by P-or Fe-deficiency in Lupinus albus L.. Acta Physiol Sin 1995; 47 (3): (in Chinese with English abstract).