Journal of Stress Physiology &
Biochemistry, Vol. 9 No. 1
2013, pp. 113-123 ISSN 1997-0838
Original Text Copyright (cc) 2013 by Saleh
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 3
Water Status and Protein
Pattern Changes Towards Salt Stress in Cotton
Basel Saleh
Department of Molecular Biology and Biotechnology, AECS, P.O.
Box 6091, Damascus, Syria
Tel.: 0096311-6112289
*E-Mail: ascientific@aec.org.sy
Received October 15, 2012
A pot experiment was
conducted to evaluate performance of four upland cotton (Gossypium hirsutum L.) varieties,
Deir-Ezzor22 (DE22), Niab78 (N78), Aleppo118 (A118) and Deltapine50
(DP50) grown under non-saline conditions (control) and salt stress (200
mM NaCl) for 7 weeks. During the course of the experiment,
potential osmotic (ψ), leaf relative water content (RWC) , water
saturation deficit (WSD), membrane stability index (MSI), and salt
tolerance index (STI) were measured. Moreover, protein pattern changes
were detected under salt application. Data indicated that potential
osmotic (ψ) considerably decreased under saline condition. Where, the
lowest value was recorded for DP50 and A118, while the highest
one was recorded for N78 and DE22. Whereas, RWC was strongly
reduced for DP50 and A118, while, it was slightly increased for N78 and
DE22 varieties. However, it was noticed that WSD showed an inverse
trend of RWC. In contrast to DP50 and A118 varieties, both the
estimated membrane stability index (MSI) and salt tolerance index (STI)
were higher in N78 and DE22. In addition, salt application induced
changes in protein pattern including decrease, increase or induction of
some polypeptides bands. According to our results, N78 and DE22
varieties showed a better protection mechanism against salinity
damage than the other two tested varieties
Key
words: Cotton; Osmotic potential; Protein; RWC; Salt stress; Variety
