Journal of Stress Physiology &
Biochemistry, Vol. 9 No. 3
2013, pp. 139-151 ISSN 1997-0838
Original Text Copyright (cc) 2013 by Singh, Sharma
ORIGINAL ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 3
Antioxidative Response of
Various Cultivars of Sorghum (Sorghum
bicolor L.) to Drought Stress
Gurpreet Singh* and Nidhi Sharma
Post-Graduate
Department of Biotechnology, Lyallpur Khalsa College, GT Road,
Jalandhar -144001 Punjab (INDIA)
*E-Mail: s_gp@rediffmail.com Received February 26, 2013
The present study
was conducted with the aim to identify the response of antioxidant
enzyme activities in seedlings of different sorghum cultivars under
mannitol stress. Seven-day old seedlings were subjected to 100-500 mM
mannitol stress which resulted in the decreases in shoot/root length
and relative water content thus indicating the primary response to
these tissues at phenotypic level. The level of lipid peroxidation as
well as the specific activity of antioxidant enzymes such as
peroxidase, catalase and superoxide dismutase increased at higher conc.
except at 200 mM conditions. The level of catalase and peroxidase
decreased at 500 mM conc. In the two different cultivars whereas the
activity of superoxide dismutase consistently increased in response to
the mannitol stress. Our data demonstrate that drought responsiveness
tolerance in sorghum cultivars during germination is associated with
enhanced activity of antioxidant enzymes.
