واكنش 9 اكوتيپ بذري از گونه هاي مختلف سه جنس بروموس ، اگروپايرول و چاودار به دوگونه قارچ از جنس FUSARIUM در شرايط آزمايشگاه و گلخانه

Response of 9 ecotype seeds of Agropyron, Bromus and Secale species to two Fusarium species in laboratory and greenhouse conditions.

The experiment was conducted for the characteristics of 9 ecotype seeds of 3 genus including Bromus (two sample), Agropyron (6 sample) and Secale (one sample) with Iranian and foreign provinc. The seed samples were exposed to level spores of Fusarium graminearum (150x10^4 and 76x10^4), F. avenaceum (900 x10^4 and 450 x10^4). Response of the main characteristics of the inoculated seed samples including (percentage and speed of germination, length of root/shoot, dry weight/fresh weight and vigour index) to two species of fungi were studied on filter paper in laboratory condition with 3 replications. The same experiment was conducted in greenhouse. The result showed that there was significant difference between the agents of infection and varieties for the characteristics of seed samples comparing with control. The percentage of germination of ecotype seeds in response to two level spores of Fusarium graminearum, reduced as 7.41 and 6.37 respectively, in laboratory but it declined as 2.23 and 0.45 for F. avenaceum. Percentage of germination of inoculated ecotype seeds with two level spores of Fusarium graminearum, was reduced respectively as 17.27 and 28.09 in greenhouse condition but it was declined as 11.36 and 4.71 respectively for F. avenaceum in greenhouse condition. Speed of germination of inoculated seeds of two level spores of Fusarium graminearum reduced as 1.41 and 0.91 compare with control in laboratory condition but it was reduced as 0.38 and 0.37 in greenhouse condition. By effect of two level spores of F. avenaceum on ecotype seeds, the speed of germination was reduced as 0.12 and 1.60 compare with control in laboratory condition but in greenhouse condition, it has a reduction rate as 0.16 for level 1 spores and an increasing as rate of 0.28 for level 2 spores compare with control. Vigour index of inoculated ecotype seeds was higher in greenhouse condition than laboratory condition.