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Publication Type J
Authors Glenn, E. P. and J. J. Brown
Title Effects of soil salt levels on the growth and water use efficiency of Atriplex canescens (Chenopodiaceae) varieties in drying soil
Source American Journal of Botany
Author Keywords Atriplex Chenopodiaceae halophytes salt stress water stress non-halophytes salinity tolerance accumulation sodium photosynthesis plants desert
Abstract The effect of salt stress on the growth and water use efficiency of the xerohalophyte Atriplex canescens (Pursh.) Nutt. in drying soil was determined by growing plants to the wilting point in soils receiving a one-time irrigation of nutrient solution containing low, medium, and high levels of NaCl. The experiment compared three varieties of A. canescens that differed in salt tolerance and capacity for Na and K uptake in previous research. Contrary to expectations, we did not find that water and salt stress were strictly additive in reducing plant performance. Soil salts enhanced the growth performance of the plants in drying soil by increasing their days to wilting, ability to extract water from the soil, organic matter production, and water use efficiency. The variety with the highest salt tolerance also had the highest growth rates and water use efficiency on drying soils. We conclude that tolerances to water and salt stress are linked through a common mechanism of Na uptake for osmotic adjustment in this species.
Author Address Univ Arizona, Environm Res Lab, Tucson, AZ 85706 USA. Glenn, EP (reprint author), Univ Arizona, Environm Res Lab, 2601 E Airport Dr, Tucson, AZ 85706 USA.
ISSN 0002-9122
ISBN 0002-9122
29-Character Source Abbreviation Am. J. Bot.
Publication Date Jan
Year Published 1998
Volume 85
Issue 1
Beginning Page 10-16
Digital Object Identifier (DOI) 10.2307/2446548
Unique Article Identifier WOS:000071684600002
Plants associated with this reference

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