Effects of NaCl on surface properties,chlorophyll fluorescence and light remission,and cellular compounds of Grewia tenax (Forssk.) Fiori and Tamarindus indica L. leaves |
| |
Authors: | Mauricio Hunsche Kathrin Bürling Amina Sirag Saied Michaela Schmitz-Eiberger Muhammad Sohail Jens Gebauer Georg Noga Andreas Buerkert |
| |
Affiliation: | (1) Institute of Crop Science and Resource Conservation, Horticultural Science, University of Bonn, Auf dem Huegel 6, 53121 Bonn, Germany;(2) Faculty of Agriculture, Department of Horticulture, University of Khartoum, 13314 Shambat, Sudan;(3) Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics, University of Kassel, Steinstrasse 19, 37213 Witzenhausen, Germany;(4) Crop Sciences Institute, National Agricultural Research Center, P.O. NIH, Islamabad, 45500, Pakistan |
| |
Abstract: | Seedlings of the salt-tolerant plant grewia [Grewia tenax (Forssk.) Fiori] and the moderately salt-tolerant tamarind (Tamarindus indica L.) were grown under controlled conditions and treated daily with NaCl solutions to investigate mechanisms of tolerance to salinity. Leaf micromorphology, cuticular wax load, chlorophyll fluorescence and light remission, as well as antioxidative potential were evaluated. As confirmed by energy-dispersive X-ray microanalysis in both species, absorption of sodium and chlorine increased with rising NaCl concentration in the treatment solution. In parallel, accumulation of calcium in grewia leaves was strongly reduced, leading to less crystals of calcium oxalate in leaf tissue. In grewia the cuticular wax load, chlorophyll content, and electron transport rate (ETR) were significantly reduced by comparatively low NaCl concentrations. In tamarind, in contrast, wax load and ETR were not significantly affected, while the decrease of chlorophyll content was less pronounced. Measurements of the antioxidative capacity and the imbalance between values of lipophilic and hydrophilic extracts at different NaCl concentrations confirmed that grewia is more salt tolerant than tamarind. This higher tolerance degree seemed to be associated with grewias’ more efficient scavenging of free radicals and the regulation of the antioxidative potential in lipophilic and hydrophilic extracts. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|