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Accueil du site → Master → Etats Unis → 1999 → Salinity effects on argan (Argania spinosa (L.) Skeels) germination and juvenile growth

Michigan State University (1999)

Salinity effects on argan (Argania spinosa (L.) Skeels) germination and juvenile growth

Michmerhuizen, Janis Sipple

Titre : Salinity effects on argan (Argania spinosa (L.) Skeels) germination and juvenile growth

Auteur : Michmerhuizen, Janis Sipple

Université de soutenance : Michigan State University

Grade : Master of Science (MS) 1999

Résumé
Soil salinization is increasing in Morocco as a result of irrigation of agricultural land. The argan forest in the Souss Valley region has been negatively impacted by urban expansion and the increase in agricultural land. Additionally, both artificial and natural regeneration efforts have had poor results. Seeds and seedlings of argan were exposed to 0, 2.5, 5.0, 7.5, and 10.0 g/l NaCl to determine the effect of salinity stress on germination and growth. Ten seed accessions were selected, five from a coastal site and five from a mountain site. Analysis of variance indicated survival, seedling growth, root length, root dry weight, and shoot dry weight significantly decreased with increasing NaCl treatments. There were some significant differences in salinity effects among the accessions ; however, there was no significant difference between the coastal and mountain sites. In addition, root:shoot ratio for seedlings increased with increasing NaCl treatments. Argan growth is severely reduced at salinity levels greater then 2.5 g/l NaCl (3.9 dS/m) and the species is not likely to establish from seed on saline soils.

Mots clés : MOROCCO, SKEELS, SPINOSA, JUVENILE, GROWTH, GERMINATION ARGANIA, EFFECTS, ARGAN, SALINITY, Biological sciences, Forestry

Présentation (PROQUEST)

Page publiée le 26 février 2015, mise à jour le 7 septembre 2017