EFFECTS OF TEMPERATURE AND LIGHT ON DIFFERENT WILD MUSTARD (SINAPIS ARVENSIS) ECOTYPES GERMINATION

In order to investigate light and temperature effects on germination of different ecotypes of wild mustard  (Sinapis arvensis L.), seeds were collected from four regions: Fars, West Azarbayjan, Khouzestan and Mazandaran Provinces. Seed size and weight, difference of dormancy state among the ecotypes, seed germination in differential light and temperature conditions were studied. The results showed that seeds from different locations did not have the same size, but they were similar in weight. The seeds had some differences in germination but there was not correlation between germination and seed size. The range of temperature for germination was between 5 to 35° C in all ecotypes.