Microbial Survey of the Genus Agrobacterium in Grapevine Nurseries in Jordan PDF

Keywords

grapevine nurseries, Jordan, bacteria

Abstract

An eleven months survey of the total bacteria and Agrobacterium of seven fields in three Jordan Valley nurseries showed significant differences between cultivated and non-cultivated fields at the same nursery, between cultivated fields in different nurseries and between non-cultivated fields in different nurseries. The total bacterial count had its highest value in April for most of the study fields (except a sterilized one); also the highest mean count of agrobacteria was in April at Baqura and Rayyan fields. Seventy-two strains of Agrobacterium were isolated; twenty-three of them belonged to biovar I, eighteen to biovar II, and thirty-one to biovar III; however only nine of them were pathogenic; seven of the pathogenic strains belong to biovar II, and two to biovar III.