مطالعه اثر خشكي و اسيد آسكوربيك بر دو رقم كلزا و پاسخ گياه سويا به عصاره گياهان تيمار ديده

Study of drought and ascorbic acid effect on two cultivars of Brassica napus and Response of Glycin max var TMS to treated plant extracts

In the present study two types of canola, Elite and Talaieh were subjected to simultaneous stress of drought (three levels) and ascorbic acid (one level). After the period of stress, plants were harvested and different growth parameters as Dry and Fresh Weight of the shoots and roots, Leaf Surface Areas, Relative Growth Rate, Relative Leaf Growth Rate, Leaf Water Content Area, Specific leaf Area, Unit leaf Rate were measured. In both plant varieties, Acid ascorbic reduced the negative effects of drought. The Elite type showed better results than Talaieh. Both plants were harvested in 40th day after exposure to drought and ascorbic acid and then water extracts of different parts of treated plants were prepared. The allelopathic effects of canola plants on germination and growth rates of soybean plant( type TMS) was evaluated. According to the results the water extract obtained from Talaieh revealed better effects on longitudinal growth of roots and aerial parts of soybean seedlings. Canola extract from %FC irrigation and ascorbic acid treated plants showed significant rise in activity of ascorbate peroxidase, catalase, and peroxidase enzymes in soybean plants compared to canola extracts under other treatments with ascorbic acid. The same results were seen in Elite type ,although the highest level of ascorbate peroxidase activity in soybean seeds was observed with the extracts from plants under FC.