Effects of cobalt on plants |
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Authors: | Syamasri Palit Archana Sharma Geeta Talukder |
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Institution: | 1. Centre for Advanced Study in Cell and Chromosome Research Department of Botany, University of Calcutta, 35, Ballygunge Circular Road, 700019, Calcutta, India 2. Vivekananda Institute of Medical Sciences, 99, Sarat Bose Road, Calcutta, India
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Abstract: | Cobalt, a transition element, is an essential component of several enzymes and co-enzymes. It has been shown to affect growth
and metabolism of plants, in different degrees, depending on the concentration and status of cobalt in rhizosphere and soil.
Cobalt interacts with other elements to form complexes. The cytotoxic and phytotoxic activities of cobalt and its compounds
depend on the physico-chemical properties of these complexes, including their electronic structure, ion parameters (charge-size
relations) and coordination. Thus, the competitive absorption and mutual activation of associated metals influence the action
of cobalt on various phytochemical reactions.
The distribution of cobalt in plants is entirely species-dependent. The uptake is controlled by different mechanisms in different
species. Biosorption involves ion-exchange mechanism in algae, but in fungi both metabolism-independent and -dependent processes
are operative. Physical conditions like salinity, temperature, pH of the medium, and presence of other metals influence the
process of uptake and accumulation in algae, fungi, and mosses. |
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