Journal of Stress Physiology &
Biochemistry, Vol.
8 No. 4
2012, pp. 157-168 ISSN 1997-0838
Original Text Copyright (cc) 2012 by Movafegh, Razeghi Jadid, Kiabi
ORIGINAL
ARTICLE
Data source : Google Scholar
QueryDate : 2016-12-24
Cites : 5
Effect of salinity stress on
chlorophyll content, proline, water soluble carbohydrate, germination,
growth and dry weight of three seedling barley (Hordeum vulgare L.) cultivars
1MSc
Plant Physiology, Islamic Azad University, Tonekabon Branch. Iran
2PhD of botany physiology and co-professor in Islamic Azad
university of Tonekabon Branch. Iran
Salinity is a serious environmental
constraint to crop production in many parts of the world and the
development of crops with improved salt tolerance is proposed as part
of solution to this problem. This research was performed out in order
to study the effects of different salinity levels on germination,
growth, dry weight, proline, water soluble carbohydrate and chlorophyll
content of three barley (Hordeum vulgare L.) cultivars named Jonoob
(INC-54), Reyhan (INC-45) & Nosrat (INC -47).The experiment was
carried out using factorial based on completely randomized design with
three replications.Seven old seedlings after germination were
transferred to Hoagland nutrient solution under the effect of salinity
levels (0, 50, 150 and 250 mM NaCl)in during seven days. Data variance
analysis showed that seed germination of three barley cultivars was
significantly (P<0.01) affected by salinity levels. Minimum
germination percentage was obtained in highest salinity (250mM
NaCl).The sequence of reduction in germination was
Jonoob>Reyhan>Nosrat. The results showed that, increasing in
salinity decreased all growth parameters. Salinity stress decreased
shoot and root length, root dry weight and chlorophyll contents in
every three cultivars. But decreasing of chlorophyll was less in Nosrat
compared to two other items. Proline content and soluble carbohydrate
were increased in all of the three cultivars with enhance of NaCl
concentration. By increasing of salinity stress accumulation of proline
and soluble sugar content in leaves of Nosrat cultivar was more than
other cultivars.As saltiness increases resistance natural responses in
this plant gets better considering less decrease in chlorophyll amount
and strategy of more production about praline and sugar solution
compared to two other items. Key
words: Barley, Chlorophyll, Dry weight , Germination, Proline,
Salinity, Soluble carbohydrate
