Bakhshi Ganje M (2022) Acute oak decline disease. Plant Pathology Science
11(1):122-132. Doi: 10.2982/PPS.11.1.122.
Abstract
Acute oak decline with signs of canker and colored discharge on the trunks of old trees has been reported in northern Iran for the past two decades. Several bacteria of the order Enterobacterales, the family Pectobacteriaceae and the genus Brenneria were isolated and identified from diseased trees. Although oak possesses several genes whose products are responsible for plant resistance to fungal pathogens, bio-trophic pathogens, hemibiotrophic pathogens, and water stress, it does not show resistance to these necrotrophic pathogenic bacteria. The mechanism of the occurrence and epidemic of acute oak decay is the predisposition of trees to successive droughts, the outbreak of some pests, and the relatively low rate of development of oak defense genes against the high rate of evolution of pathogenic genes of necrotrophic bacteria such as Brenneria species. Due to the many climate changes in recent years, there may be an epidemic of the disease in the forests of other parts of the country in the future. This article describes research into the disease to pave the way for an appropriate method of disease management.
