Journal of Stress Physiology &
Biochemistry, Vol. 9 No. 1
2013, pp. 124-135 ISSN 1997-0838
Original Text Copyright (cc) 2013 by Javadmanesh, Rahmani and
Pourakbar
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 1
Effect of Abiotic Stresses on
Histidine kinases Gene Expression in Zea
mays L. cv. SC. 704
Susan Javadmanesh*, Fatemeh Rahmani
and Latifeh Pourakbar
Biology Department and Biotechnology Research Centre of Urmia
University, Urmia, Iran
Tel.: +989112703550
*E-Mail: S_Javadmanesh@yahoo.com
Received October 16, 2012
UV-B radiation and
osmotic stress (like drought and salinity) have a significant effect on
physiology, morphology, biochemistry and molecular biology. To cope
with such stimuli, plants must be able to effectively sense, respond to
and adapt to changes in their biological activities. Hence, signal
transduction pathways play important role in response to environmental
stimuli. In this study, the expression of three Histidine Kinases
including ZmHK1, ZmHK2 and ZmHK3a was studied in maize plants
exposed to 8 days drought, salinity and UV-B stresses applying
transcript approach. The semi-quantitative RT-PCR analyses of
ZmHKs showed up-regulation of ZmHK1 and ZmHK3 agenes after 8 days
exposure to applied stresses except salinity in leaves, although, their
regulation was more prominent during drought stress. Astonishingly,
exposure to these stresses showed down-regulation of all genes in maize
roots. However, the ZmHK1 behavior was quite different from two
other homologues and showed up-regulation in combined stresses. We
suggest that ZmHK1 and ZmHK3a, as cytokinin transmembrane receptors,
sense osmolarity changes in cells caused by dehydration. Our data
supports the involvement of ZmHK homologues under these stresses in
maize and provides a gene expression dynamics during the stress which
will be valuable for further studies of the molecular mechanisms of
stress tolerance in maize.
