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Publication Type J
Authors Aiazzi, M. T., P. D. Carpane, J. A. Di Rienzo and J. A. Arguello
Title Effects of salinity and temperature on the germination and early seedling growth of Atriplex cordobenisis Gandoger et Stuckert (Chenopodiaceae)
Source Seed Science and Technology
Author Keywords polymorphic seeds; triangularis; thermoperiod; halophytes; tolerance; leaves; light
Abstract Experiments were conducted to determine the effect of salinity and temperature on the germination and early seedling growth of Atriplex cordobensis. Germination recovery under optimum conditions after exposure to salinity was also studied. Seeds were exposed to 0, 100, 200 and 300 mM NaCl and temperature regimes of 10, 20 and 30degreesC. Our data indicate that seed germination of A. cordobensis is significantly affected by the interaction of salinity and temperature. The seeds of A. cordobensis at 10 and 20degreesC behave in the same way as other halophyte seeds, with the ability to tolerate hyper- saline conditions or to stay dormant until appropriate conditions appears. However, at 30degreesC seeds are very sensitive to salt stress, which acts as a selective factor favoring vigorous seeds. On the other hand, seedlings have the ability to take up Na+ and probably use it for osmotic adjustment allowing them to growth under water stressing conditions. Thus the mechanisms of tolerance to salt stress in seeds and seedling contribute to explain the distribution of A. cordobensis in the semiarid region of central Argentina.
Author Address Univ Nacl Cordoba, Fac Ciencias Agropecuarias, Dept Prod Vegetal, Lab Fisiol Vegetal, CC 509, RA-5000 Cordoba, Argentina Univ Nacl Cordoba, Fac Ciencias Agropecuarias, Dept Prod Vegetal, Lab Fisiol Vegetal, RA-5000 Cordoba, Argentina Aiazzi MT Univ Nacl Cordoba, Fac Ciencias Agropecuarias, Dept Prod Vegetal, Lab Fisiol Vegetal, CC 509, RA-5000 Cordoba, Argentina
29-Character Source Abbreviation Seed Sci. Technol.
Year Published 2002
Volume 30
Issue 2
Beginning Page 329-338
Unique Article Identifier ISI:000177125600009
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