Journal of Stress Physiology &
Biochemistry, Vol.
8 No. 4
2012, pp. 199-217 ISSN 1997-0838
Original Text Copyright (cc) 2012 by Mohammed, Mohamed, Zaki, Mogazy
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 14
Pre-exposure to gamma rays
alleviates the harmful effect of salinity on cowpea plants
Abdel Haleem M.A. Mohammed, Heba I.
Mohamed*, Laila M. Zaki, Asmaa M. Mogazy
Biological
and Geological Sciences Department, Facutlty of Education, Ain Shams
University, El Makres St. Roxy, Cairo, Egypt (ARE) Post code: 1575
*E-Mail: hebaibrahim79@yahoo.com
Received August 25, 2012
Soil salinity is one of the most
severe factors limiting growth and physiological response in cowpea
plants. In this study, the low concentrations of NaCl (25mM) increased
plant growth, photosynthetic pigments content, total soluble protein
content, nucleic acids contents (DNA and RNA), lipid peroxidation, non
enzymatic antioxidants (anthocyanin, ascorbic acids and α-tocopherol),
number of legumes per plant, number of seeds per legume, number of
seeds per plants, legume length, fresh and dry weight of legumes and
weight of 1000 seeds and total soluble proteins and carbohydrate
contents in harvested seeds as compared to control. On the other hand,
the high concentrations of NaCl (50, 100 and 200 mM) caused reduction
in plant growth, photosynthetic pigments content, total soluble protein
content, nucleic acids contents (DNA and RNA), all yield attributes and
harvested seeds components but increased lipid peroxidation and non
enzymatic antioxidants (anthocyanin, ascorbic acids and α-tocopherol).
Electrophoretic studies of proteins showed three types of modifications
are observed in the protein patterns of cowpea seeds, some protein
bands were disappeared, other proteins were selectively increased and
synthesis of new set of protein was induced. Some of these responses
were observed under gamma rays and salinity treatments, while others
were induced by either gamma rays or salinity. Seeds irradiation with
gamma rays alleviates the adverse effect of salt stress compared to non
irradiated seeds.
Key
words: lipid peroxidation, non enzymatic antioxidants,
nucleic acids, protein electrophoresis, yield.
