Journal of Stress Physiology & Biochemistry, Vol. 8 No. 1
2012, pp. 232-240 ISSN 1997-0838
Original Text Copyright (cc) 2012 by Ibn Maaouia-Houimli, Dridi-Mouhandes, ben Mansour-Gueddes and Denden
ORIGINAL
ARTICLE
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QueryDate : 2016-12-24
Cites : 2 |
24-Epibrassinolide ameliorates the adverse effect of salt stress (NaCl) on pepper (Capsicum annuum L.)
Ibn Maaouia-Houimli Samira *, Bouthaina Dridi-Mouhandes, Samia ben Mansour-Gueddes, Mounir Denden
Department of Horticulture, High Institute of Agronomy, 4042 Chott-Mariem, Tunisia
Tel: +216 2159 2240
*E mail: h.samira@laposte.net
Received January 23, 2012
The
present study investigates the role of 24-epibrassinolide (EBL) in
inducing plant tolerance to salinity. Seedlings
of pepper (Capsicum
annuum
L.) were grown in the presence of 70
mM NaCl
and were sprayed with
10-6
M EBL
at 7
days after transplantation
and were sampled at 28
day.
The plants
exposed
to NaCl exhibited a
significant decline in relative growth rate, net CO2
assimilation, stomatal conductance, transpiration and water use
efficiency.
However, the follow up treatment with EBL significantly
improved the above parameters.
EBL treated plants had greater relative growth rate compared to
untreated plants when exposed to salt stress. Application of EBL
increased photosynthesis by increasing stomatal conductance in both
control and salt stressed plants and may have contributed to the
enhanced growth. The water use efficiency was improved because CO2 assimilation is more important than the transpiration.
Key words: 24-epibrassinolide / pepper / NaCl / relative growth rate / gas exchange.
