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Publication Type CH
Authors Cuartero, J., J. M. Pulido, M. L. Gomez-Guillamon and M. Alvarez
Book Author U. Aksoy, D. Anac, S. Anac, J. Beltrao, J. BenAsher, J. Cuartero, T. J. Flowers and S. Hepaksoy
Editors U. Aksoy, D. Anac, S. Anac, J. Beltrao, J. BenAsher, J. Cuartero, T. J. Flowers and S. Hepaksoy
Title Salt removal potential of barley, alfalfa, Atriplex patula and A-prostrata
Source Proceedings of the International Symposium on Techniques to Control Salination for Horticultural Productivity
Author Keywords bioremediation maximum salt uptake potential productivity Michaelis-Menten equation growth chenopodiaceae salinity tolerance water soil
Abstract The salt removing capacity of barley (Hordeum vulgare L. cv. Hassan), alfalfa (Medicago sativa L. cv. Aragon), and two wild halophytic species from marshes, Atriplex patula and A. prostrata, were evaluated for their efficiency to remove salts from the growth medium. The study took place in hydroponics culture with half strength Hoagland nutrient solution. Zero, 25, 50, 75 and 100 mM NaCl were added to the nutrient solution of barley and alfalfa while Atriplex species received 0, 50, 100, 150, 200 and 250 mM NaCl. At the end of the experiment, shoot fresh and dry weights and shoot Na concentration were measured. The comparison of salt removal potential (Fmax) was made in terms of mmol Na per kg dry weight per day and as mmol Na absorbed by plants per liter of water uptake per day. Atriplex patula and A. prostrata showed similar salt removal potential in terms of shoot dry weight (about 45 mmol Na kg(-1) d(-1)), and barley had the highest Fmax (63 mmol Na kg(-1) d(-1)). Alfalfa had much lower salt removal potential (25 mmol Na kg(-1) d(-1)). Atriplex patula showed slightly higher salt removal potential in terms of water uptake (0.17 mmol 1(-1) d(-1)) than A. prostrata (0.15 mmol 1(-1) d(-1)); barley potential was similar to that of the Atriplex species (0.16 mmol 1(-1) d(-1)), and alfalfa showed the lowest potential (0.07 mmol 1(-1) d(-1)). The Km obtained showed the high adaptation of A. prostrata to saline conditions as a halophyte species and the moderate adaptation of barley to saline soils since its Km had a similar value to the Km obtained for A. patula. The NaCl removal rate followed the Michaelis-Menten type kinetics. The use of Fmax and Km allowed the comparison between quite different species in relatively simple experiments. Barley seems to be the species with high salt removal potential under typical Mediterranean conditions.
Author Address CSIC, La Mayora Expt Stn, Malaga 29750, Spain Cuartero, J (reprint author), CSIC, La Mayora Expt Stn, Malaga 29750, Spain
ISSN 0567-7572 90-6605-835-8
ISBN 0567-7572 90-6605-835-8
Year Published 2002
Issue 573
Beginning Page 387-391
Unique Article Identifier WOS:000176732300046
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