SYSTEMIC RESISTANCE IN SUGAR BEET ELICIATED BY NON-PATHOGENIC, PHYLLOSPHERE-COLONIZING Bacillus pumilus AND B. subtilus AGAINST THE PATHOGEN Cercospora beticola Sacc.
Esh, A., Atia, M., Tohamy, M., Taghian, S. (2011). SYSTEMIC RESISTANCE IN SUGAR BEET ELICIATED BY NON-PATHOGENIC, PHYLLOSPHERE-COLONIZING Bacillus pumilus AND B. subtilus AGAINST THE PATHOGEN Cercospora beticola Sacc.. EKB Journal Management System, 2(1), 67-83. doi: 10.21608/jppp.2011.84657
A. M. H. Esh; M. M. M. Atia; M. R.A. Tohamy; Shadia Taghian. "SYSTEMIC RESISTANCE IN SUGAR BEET ELICIATED BY NON-PATHOGENIC, PHYLLOSPHERE-COLONIZING Bacillus pumilus AND B. subtilus AGAINST THE PATHOGEN Cercospora beticola Sacc.". EKB Journal Management System, 2, 1, 2011, 67-83. doi: 10.21608/jppp.2011.84657
Esh, A., Atia, M., Tohamy, M., Taghian, S. (2011). 'SYSTEMIC RESISTANCE IN SUGAR BEET ELICIATED BY NON-PATHOGENIC, PHYLLOSPHERE-COLONIZING Bacillus pumilus AND B. subtilus AGAINST THE PATHOGEN Cercospora beticola Sacc.', EKB Journal Management System, 2(1), pp. 67-83. doi: 10.21608/jppp.2011.84657
Esh, A., Atia, M., Tohamy, M., Taghian, S. SYSTEMIC RESISTANCE IN SUGAR BEET ELICIATED BY NON-PATHOGENIC, PHYLLOSPHERE-COLONIZING Bacillus pumilus AND B. subtilus AGAINST THE PATHOGEN Cercospora beticola Sacc.. EKB Journal Management System, 2011; 2(1): 67-83. doi: 10.21608/jppp.2011.84657

SYSTEMIC RESISTANCE IN SUGAR BEET ELICIATED BY NON-PATHOGENIC, PHYLLOSPHERE-COLONIZING Bacillus pumilus AND B. subtilus AGAINST THE PATHOGEN Cercospora beticola Sacc.

Journal of Plant Protection and Pathology
Article 8, Volume 2, Issue 1, January 2011, Page 67-83  XML PDF (536.78 K)
Document Type: Original Article
DOI: 10.21608/jppp.2011.84657
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Authors
A. M. H. Esh1; M. M. M. Atia2; M. R.A. Tohamy2; Shadia Taghian1
1Sugar Crops Research Institute, A.R.C., Giza, Egypt
2Faculty of Agriculture, Zagazig Univ., Egypt
Abstract
A total of 10 Bacillus subtilis (7) and Bacillus pumilus (3) isolates from sugar beet phyllosphere were evaluated for its biocontrol activity against sugar beet cercospora leaf spot disease (CLS) under greenhouse and field conditions compared to the fungicide Topsin M70. PR-related proteins, chitinase, β-1,3-glucanase, peroxidase, polyphenol oxidase as well as indol acetic acid were determined in treated and untreated sugar beet plants.  Under greenhouse conditions the reduction in disease severity caused by B. subtilis and B. pumilus treatments ranged from 73.33 - 80% and 80 - 83% respectively. Under field conditions the reduction ranged from 56.18 to 81.27% and 62.55 to 81.27% from B. subtilis and B. pumilus respectively.The levels of the determined PR proteins significantly increased in all the treated plants either with B. subtilis or B. pumilus. In addition, the levels of IAA were higher in the treated plants compared to the untreated plants. The sucrose percentage increased in the treated plants compared to the infected untreated control. The present study suggested the role of  Bacillus subtilis and Bacillus pumilus in inducing plant acquired resistance.
Keywords
Cercospora beticola; Bacillus subtilis; Bacillus pumilus; cercospora leaf spot; biological control; induced acquired resistance
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