تفاوت جوانه زنی بذرهای علف هرز منداب در پاسخ به دماهای مختلف

Rocket (Eruca sativa Miller) also introduces as one of the weeds of the country's cereals, especially in Khuzestan province. There are two types of yellow and black seed in Silique fruit of Rocket. In order to effect the different temperatures on germination of seed types (yellow and black seeds), a factorial experiment was conducted in a completely randomized design(CRD) with three replications at Khuzestan Agricultural science and Natural Resources University in 2018. The first factor was seed types of Rocket (yellow and black seeds) and the second factor was different temperatures (5, 10, 15, 20, 25, 30, 35 and 40 °c). The results illustrated that there was a significant difference germination between the two yellow and black seeds, so that yellow seeds had more germination (63%) than black seeds (54%). Also, the results of temperature showed that there was no significant difference between germination between 5 (88%), 10 (91%), 15 (89%), 20 (89%) and 25 °C (92%) but percentage of seed germination at 30 °C was 18% which had a significant difference with the above temperatures. No germination was observed at 35 and 40 °C. by increasing temperature, the rate of germination increased and the highest rate of germination was observed at 25 °C further the germination rate of yellow seeds was higher than black seeds. This is likely that black seeds have more dormancy and after ripening than yellow seeds.