24-Epibrassinolide ameliorates the adverse effect of salt stress (NaCl) on pepper (Capsicum annuum L.)
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2012, Vol 8, Issue 1
Abstract
The present study investigates the role of 24-epibrassinolide (EBL) in inducing plant tolerance to salinity. Seedlings of pepper ([i]Capsicum annuum[/i] L.) were grown in the presence of 70 mM NaCl and were sprayed with 10[sup]-6[/sup] 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 CO[sub]2[/sub] 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 CO[sub]2[/sub] assimilation is more important than the transpiration.
Authors and Affiliations
Samira Ibn Maaouia-Houimli, Bouthaina Dridi-Mouhandes, Samia ben Mansour-Gueddes, Mounir Denden
Keywords
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