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Effect of Salinity on Seed Germination, Growth, and Ion Accumulation of Atriplex patula (Chenopodiaceae)
Irwin A. Ungar
American Journal of Botany
Vol. 83, No. 5 (May, 1996), pp. 604-607
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2445919
Page Count: 4
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Seeds and seedlings of the halophyte Atriplex patula were exposed to 0-2% NaCl to determine the effect of salt stress on germination and growth Seeds germinated and plants survived and grew in solutions of up to 2 0% NaCl. Both seed germination and dry mass production were negatively affected by increased salinity Dry mass production declined to 1% of controls and seed germination to 17% of controls in the 2% NaCl treatments, indicating that seeds were less inhibited than growing plants Also, recovery treatments indicated that high salinity did not permanently injure seeds Percent ash, and Na- and Cl- ions increased in shoots with each salt increment, while the K+ ion content decreased sharply Atriplex patula is a facultative halophyte, and is limited to low and moderately saline sites because both seed germination and growth are severely reduced at salinities > 1% NaCl
American Journal of Botany © 1996 Botanical Society of America, Inc.