GERMINATION RESPONSES OF Lygeum spartum L. CARYOPSES IN WESTERN ALGERIA REGARDING THE DIFFERENT ....

This research focuses on albardine (Lygeum spartum L.), a Mediterranean perennial poaceae that is on the verge of extinction. We conducted laboratory tests on germ behaviour of caryopses contained in the infrutescences of two provenances of the species examined (steppe and coastal) with respect to various physical and chemical pretreatments and salinity for the sake of species conservation. The inflorescences of the two provenances differed from one another, particularly in terms of the number of caryopses in each and their germination response to the various pretreatments employed. Albardine inflorescences in the steppe region (Ain-Sekhona station) have three caryopses on average (45.63 percent), whereas those in the coastal region (Sidi Djelloul station) have two caryopses on average (64.66 percent ). With comparison to the witness, pre-soaking in distilled water for 24 hours and chemical scarification with pure sulfuric acid (97 percent) for 4 hours allowed lifting of the integumentary inhibition affecting caryopses, resulting in greater germination at an ideal temperature of 20°C. Caryopses from the steppe region have a greater tolerance threshold (2 percent equivalent to 31.3 ms/cm) than caryopses from the coastal region (1 percent equivalent to 15.6 ms/cm) in germination experiments under various salt sea water concentrations. These findings are unquestionably beneficial to ex-situ Albardine conservation and the development of plants that can be used to bolster vulnerable populations in natural settings.

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