La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effect of storage period, color and collection period on seed germination of Diplotaxis Harra (Forssk.) Boiss., an invasive plant species of Southern Tunisia
Auteurs :	Tahar Tlig, Auteur ; Mustapha Gorai, Auteur ; Mohamed Neffati, Auteur
Type de document :	Article
Dans :	Ecologia Mediterranea (37(1) 2011)
Article en page(s) :	83-89
Résumé :	Seeds of Diplotaxis harra (Forssk.) Boiss., an invasive plant species of Southern Tunisia, were collected in July 2007, January 2008 and, April 2008 and stored under laboratory conditions. Directly after collection and each three months, germination experiments were conducted in darkness at 15 degrees C, which corresponds to the thermal optimum for the germination of this species. The results show that seed color did not significantly affect the germination pattern of D. harra. Seeds, notably those collected in summer, maintained a high germination rate even after 18-month storage period. These germination characterisitics could partly explain the invasive behaviour of this species.

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