مطالعه اثر كادميوم كالريد بر پارامترهاي رشد، محتواي كلروفيل ، كارتنوييدها و محتواي قند و پروتيين در گياهك كلزا

Study the effects of cadmium chloride on growth parameters, chlorophyll, carotenoids, proteins and sugar content in canola (Brassica napus) plants.

In Order to study the effects of cadmium on some growth and physiological parameters on canola plants, seeds were sterilized and treated with different (0,10,50,100 and 500 µ inm)in cadmium Concentration petri dishes. Petri were transferred to germinator which was under control for seven days and toxicity effect this ion on seedlings were investigated. For this reason identical seedlings from each sample were selected then root and shoot length and weight as well as chlorophyll and carotenoids content were measured. The content of reduced sugar and proteins of these oranges were measured by spectrophotometeric methods. Results showed a significant decrease in root and epicothylodon growth. We also observed a significant decrease in shoot and root fresh and dry weight in seedlings which were treated M withl00and500 µm of cadmium ion .Cholorophyll and carotenoids content decreased significantly. Total protein content increased in leaves and roots of those seedlings which were treated with 10,50 and l00µm of cadmium. This increase probably is the 100 µm indication of increase in enzymes involved in defense mechanism in plants and antioxidant poly peptides which also are a defense mechanism .On the order hand, the amount of reduced sugar increased in cothylodonary leaves and the reason of this could be the conversion of insoluble sugar, but the content of sugar decreased in roots.