BIOCONTROL TRAITS OF BACILLUS SPP. ISOLATED FROM CUCUMBER RHIZOSPHERE AGAINST SCLEROTINIA SCLEROTIORUM

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Rezaei Roghayeh; ALIZADEH HAMIDREZA; AZADVAR MEHDI; SALARI KHADIJAH

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Journal: BIO CONTROL IN PLANT PROTECTION Year:2016 | Volume:4 | Issue:2 Page(s): 85-98

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Title

BIOCONTROL TRAITS OF BACILLUS SPP. ISOLATED FROM CUCUMBER RHIZOSPHERE AGAINST SCLEROTINIA SCLEROTIORUM

Author(s)

Rezaei Roghayeh | ALIZADEH HAMIDREZA | AZADVAR MEHDI | SALARI KHADIJAH | Issue Writer Certificate

Keywords

BIOLOGICAL CONTROLQ1

MOLECULAR IDENTIFICATIONQ1

PROTEASE ENZYMEQ2

VOLATILE COMPOUNDSQ1

Abstract

Sclerotinia sclerotiorumis an important plant pathogenic fungus. Biocontrol agents such as Bacillus spp. are promising candidates to manage the disease caused by this fungus. In this study, we identified 63 isolates of Bacillusspp. obtained from cucumber rhizosphere based on morphological, physiological and biochemical characteristics. The antagonistic activity of the isolates against the fungal pathogen was evaluated using dual culture method and the production of volatile metabolites. According to the obtained results, the isolates Ba17, Ba24, Ba14 and Ba29b showed the most inhibitory effects against the pathogen in dual culture method. Volatile metabolites of isolates Ba21, Ba29c, Ba10b, Ba17, Ba29b, Ba9c and Ba12a, reduced the mycelial growth of the pathogen by 87.14, 84.85, 83.42, 82.42, 79.14, 79.14 and 77.71%, respectively and had a significant difference compared with the control. In the greenhouse trails, isolates Ba17, Ba21, Ba10b, Ba29c and Ba14 decreased the disease index of Sclerotinia stem rot, significantly. The isolates Ba29c, Ba10b, Ba17, Ba29b, Ba24 were capable to show PROTEASE ENZYME activity. Results also showed that isolates Ba29c, Ba10b and Ba21 were capable of producing surfactin. MOLECULAR IDENTIFICATION of isolates with antagonistic activities against the fungal pathogen by partial sequencing of 16S rDNA gene which amplificated with specific primers fD1 and rD1 was performed. Based on this procedure, isolates showed high homology withBacillus cereus, B. subtilis, B. licheniformis, B. endophyticusand Lysinibacillus spp..

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APA: Copy

Rezaei, Roghayeh, ALIZADEH, HAMIDREZA, AZADVAR, MEHDI, & SALARI, KHADIJAH. (2016). BIOCONTROL TRAITS OF BACILLUS SPP. ISOLATED FROM CUCUMBER RHIZOSPHERE AGAINST SCLEROTINIA SCLEROTIORUM. BIO CONTROL IN PLANT PROTECTION, 4(2 ), 85-98. SID. https://sid.ir/paper/242958/en

Vancouver: Copy

Rezaei Roghayeh, ALIZADEH HAMIDREZA, AZADVAR MEHDI, SALARI KHADIJAH. BIOCONTROL TRAITS OF BACILLUS SPP. ISOLATED FROM CUCUMBER RHIZOSPHERE AGAINST SCLEROTINIA SCLEROTIORUM. BIO CONTROL IN PLANT PROTECTION[Internet]. 2016;4(2 ):85-98. Available from: https://sid.ir/paper/242958/en

IEEE: Copy

Roghayeh Rezaei, HAMIDREZA ALIZADEH, MEHDI AZADVAR, and KHADIJAH SALARI, “BIOCONTROL TRAITS OF BACILLUS SPP. ISOLATED FROM CUCUMBER RHIZOSPHERE AGAINST SCLEROTINIA SCLEROTIORUM,” BIO CONTROL IN PLANT PROTECTION, vol. 4, no. 2 , pp. 85–98, 2016, [Online]. Available: https://sid.ir/paper/242958/en

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