STUDY OF FIRE BLIGHT ON PEAR TREES IN GUILAN PROVINCE CAUSED BY ERWINIA AMYLOVORA

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NIKNEZHAD KAZEMPOUR M.; KAMRANI E.; ALI B.

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Journal: Journal of Water and Soil Science Year:2007 | Volume:11 | Issue:40 (B) Page(s): 257-264

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Title

STUDY OF FIRE BLIGHT ON PEAR TREES IN GUILAN PROVINCE CAUSED BY ERWINIA AMYLOVORA

Author(s)

NIKNEZHAD KAZEMPOUR M. | KAMRANI E. | ALI B. | Issue Writer Certificate

Keywords

PEARQ4

ERWINIA AMYLOVORAQ3

FIRE BLIGHTQ3

PCRQ2

GUILAN PROVINCEQ3

Abstract

Fire blight caused by ERWINIA AMYLOVORA, is a serious disease of pome fruits in many areas in the world which causes evaluative necrosis. Indeed, E. amylovora can invade the whole tree solely by internal progression through the host tissues. In this research, symptoms of necrotic shoots and exudates production on infected PEAR trees in different areas of GUILAN PROVINCE (Astaneh Ashrafieh, Lahijan and Kiashahr) were surveyed. Samples were taken from infected tissues of diseased trees. For isolation of bacterial causal agent, the infected tissues were crushed in pepton water, then 100ml of the extracts were cultured on Sucrose Nutrient Agar (SNA) and Luria Berthani (LB) containing Cyclohexamid antibiotic (50 mg / ml). The isolated bacteria were rod-shaped, gram negative and facultatively an-aerobic. The bacteria produced Levan on media including sucrose, but could not produce fluorescent pigments on King’s B medium. All strains made hypersensitive reaction on tobacco leaves. All isolates were oxidase, nitrate, urease and indole negative and were not able to rot potato tuber slices, produce H2S and grow in 36oC. The isolates could use citrate, acetoin, sorbitol and trehalose and their gelatin test was positive. Based on morphological, biochemical, physiological characteristics and production of a 937 bp with specific primer Ea1 and Ea2 in PCR method, the strains were identified as E. amylovora. This is the first report of the existence of this bacterium on PEAR fruit trees in GUILAN PROVINCE.

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APA: Copy

NIKNEZHAD KAZEMPOUR, M., KAMRANI, E., & ALI, B.. (2007). STUDY OF FIRE BLIGHT ON PEAR TREES IN GUILAN PROVINCE CAUSED BY ERWINIA AMYLOVORA. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), 11(40 (B)), 257-264. SID. https://sid.ir/paper/15049/en

Vancouver: Copy

NIKNEZHAD KAZEMPOUR M., KAMRANI E., ALI B.. STUDY OF FIRE BLIGHT ON PEAR TREES IN GUILAN PROVINCE CAUSED BY ERWINIA AMYLOVORA. WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES)[Internet]. 2007;11(40 (B)):257-264. Available from: https://sid.ir/paper/15049/en

IEEE: Copy

M. NIKNEZHAD KAZEMPOUR, E. KAMRANI, and B. ALI, “STUDY OF FIRE BLIGHT ON PEAR TREES IN GUILAN PROVINCE CAUSED BY ERWINIA AMYLOVORA,” WATER AND SOIL SCIENCE (JOURNAL OF SCIENCE AND TECHNOLOGY OF AGRICULTURE AND NATURAL RESOURCES), vol. 11, no. 40 (B), pp. 257–264, 2007, [Online]. Available: https://sid.ir/paper/15049/en

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