Abstract
Aeluropus lagopoides(Linn.) Trin. Ex Thw. (Poaceae) is a perennial grass distributed from coastal Sindh and Balochistan to saline flats of Punjab, Pakistan. Seeds collected from an inland population ofA. lagopoides located on the University of Karachi campus were germinated under various levels of salinity (0, 100, 200, 300, 400 and 500m M NaCl) and temperature regimes (10/20, 15/25, 20/30 and 25/35°C) in a 12h dark/12h light photoperiod. Highest germination was obtained under non-saline conditions, and an increase in NaCl concentration progressively inhibited germination. Inhibition of germination was greater at cooler temperatures (10/20°C) when no seed germinated above a concentration of 300m M NaCl. The germination response at moderate temperatures (20/30°C) was optimal, with 30% of seeds germinating in 500m M NaCl. The rate of germination decreased as salinity increased. Germination rate was highest at 20/30°C and lowest at 10/20°C. Seeds were transferred from salt solutions to distilled water after 20d and those from high salinities recovered quickly at warmer temperatures with an optimal response at 20/30°C.
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