Abstract
This experiment was conducted with different concentrations of cobalt (100, 200, 300, 400 and 500
ppm) on wheat (Triticum aestivum L.) plants for quantification of its effects on growth performance in
a sand culture medium using Hoagland solution. Germination was tested in petri dishes using same
treatments. Inhibitory effect of Co on germination percent was observed from 200ppm of Co while
vigor index decreased with increasing Co concentration. No negative effect of Co on germination
index was found up to 300 ppm while beyond that higher percent inhibition of wheat seed
germination was recorded. An enhancing effect on plant height, leaf number, leaf area and dry matter
production was observed up to 200ppm of Co treatment while higher concentrations showed
detrimental effect of the same. Chlorophyll a/b increased and chlorophyll stability index decreased
with increasing Co concentration from 300 ppm onwards. Results from analysis of above ground plant
biomass showed higher accumulation of Co with increasing concentration in the medium. However, at
100 ppm of Co treatment, significantly higher grain accumulation of Co was recorded compared to
500ppm of Co treatment. From these findings, it can be summarised that at lower concentrations (up
to 200ppm) Co has an enhancing effect on growth of wheat crop and it has a good phyto-extracting
ability for cobalt.
Banashree Sarma, Prema Devi, Nirmali Gogoi, Yendrembam Menaka Devi. (2014) EFFECTS OF COBALT INDUCED STRESS ON TRITICUM AESTIVUM L. CROP, Asian Journal of Agriculture and Biology, Volume 2, Issue 2.
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