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Publication Type J
Authors Atia, A., A. Smaoui, Z. Barhoumi, C. Abdelly and A. Debez
Title Differential response to salinity and water deficit stress in Polypogon monspeliensis (L.) Desf. provenances during germination
Source Plant Biology
Author Keywords Germination halophyte salinity water deficit halophyte cakile-maritima seed-germination haloxylon-ammodendron tolerance growth salt populations
Abstract The effects of provenance, salinity (0, 100, 200, 300 and 400 mm NaCl) and water deficit (0, -0.6, -1.1, -1.6 and -2.1 MPa mannitol solutions) on germination success of Polypogon monspeliensis were investigated. Eight Tunisian provenances from different bioclimatic origins were considered. Seed mass varied significantly between populations. Germination percentage was significantly affected by provenance, salinity and their interaction. Even at 300 mm NaCl, germination percentage of Tabarka, Kelbia and Kebili ranged from ca. 60% to ca. 85%, whereas Monastir, Gabes and El Haouaria succeeded in germinating in 200 mm NaCl. The 300 mm NaCl treatment highly reduced germination of Monastir and El Haouaria, and inhibited that of Gabes. Soliman and El Jem were the least salt-tolerant provenances. The severity of water deficit impact on seed germination was also provenance-dependent, especially at osmotic potentials of -1.1 to -1.6 MPa. At -1.6 MPa, germination percentage of Tabarka, Monastir and Kebili was close to 80%, while that of Gabes, El Jem and Kelbia was 0%, 5% and 20%, respectively. Regardless of provenance, germination was strongly impaired at -2.1 MPa. The variability of stress tolerance in P. monspeliensis could be of practical significance in programmes aimed at restoring arid and salt-affected lands since it allows use of provenances that germinate and establish successfully under unfavourable conditions prevailing in such zones.
Author Address [Atia, A.; Smaoui, A.; Barhoumi, Z.; Abdelly, C.; Debez, A.] Ctr Biotechnol, Lab Plantes Extremophiles, Hammam Lif 2050, Tunisia. Atia, A, Ctr Biotechnol, Lab Plantes Extremophiles, Technopole Borj Cedria,BP 901, Hammam Lif 2050, Tunisia. atbdllh@yahoo.fr
ISSN 1435-8603
ISBN 1435-8603
29-Character Source Abbreviation Plant Biol.
Publication Date May
Year Published 2011
Volume 13
Issue 3
Beginning Page 541-545
Digital Object Identifier (DOI) 10.1111/j.1438-8677.2010.00401.x
Unique Article Identifier ISI:000289479400015
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