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Showing 3 results for Brenneria
Bacterial Bark Canker Disease of Walnut Tree
Meysam Azadi, Zabihollah Azami-Sardooei, Mehdi Azadvar,
Volume 8, Issue 2 (9-2019)
Abstract
AzadiMoghadam M, AzamiSardooei Z and Azadvar M (2019) Bacterial bark canker disease of walnut tree. Plant Pathology Science 8(2):38-44. DOI: 10.2982/PPS.8.2.38 


Bacterial canker disease is one of the most destructive diseases of walnut trees that causes die back and plant decline and also great damages to quality and quantity of fruits. The disease can be observed in two forms, at depth and the surface of the bark which cause by two bacteria, Brenneria nigrifluens and B. rubrifaciens, respectively. The most important way of the pathogen penetration is the wounds in the trunk and branches which are occurred due to human ‎activities or mechanical harvesting equipment. The disease becomes severe with the deep irrigation and when the nutrition is insufficient and ‎temperature and humidity are high.‎ Current paper explains history, importance, symptoms, biology, host range, sampling and isolation method also differential characteristics of bacteria and methods of disease management.

Bacterial diseases of walnut trees in Iran
Kavous Keshavarzi, Hadi Karimipour Fard,
Volume 10, Issue 1 (2-2021)
Abstract
Keshavarzi K, Karimipourfard H (2021) Bacterial diseases of walnut trees in Iran. Plant Pathology Science 10(1):107-116.        Doi:10.2982/PPS.10.1.107.

Walnut is one of the most important fruit trees in Iran, which is always exposed to pathogens, especially bacteria. The three most important bacterial diseases of walnut in Iran are bacterial blight (Xanthomonas arboricola pv. juglandis), skin cankers (Brenneria nigrifluens, Brenneria rubrifacians) and crown gall (Agrobacterium tumefaciens). Bacteriological characteristics and pathogenicity of pathogenic bacteria, methods of managing these diseases, along with suggestions for identifying resistant genotypes of walnut trees by molecular methods are described in this article.


 
11- Acute oak decline disease
Meysam Bakhshi Ganje,
Volume 11, Issue 1 (3-2022)
Abstract
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.



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