Possible involvement of non-protein nitrogenous metabolites in conferring in vitro lead tolerance to Dalbergia sissoo Roxb.

Roma Rani, Vimala* Y.

Abstract


Dalbergia sissoo Dehn. is planted on the roadsides all over India. A heavy load of lead pollution on these sites due to various reasons is well documented. An investigation was thus, conducted to study the in vitro differential action of lead on morphological and biochemical parameters of D. sissoo shoots regenerated from young nodal explants. D. sissoo has been observed to tolerate very high concentration of Pb (150mgl-1) in vitro, through its stress alleviation mechanism, which possibly involves detoxification of heavy metal generated ROS species by nitrogenous metabolites, and by accumulation of antioxidant - carotenoids and phenolics.  The accumulation of stress alleviating proteins could not be found in the present investigation.

Keywords


Dalbergia sissoo; Lead (Pb) pollution; Bioindicator; Growth; PVP (polyvinylpyrrolidone)

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