Pseudomonas diversity in western Algeria: role in the stimulation of bean germination and common bean blight biocontrol

被引:0
|
作者
Slimane Mokrani
Abdelwahab Rai
Lakhder Belabid
Ameur Cherif
Hanane Cherif
Mouna Mahjoubi
Elhafid Nabti
机构
[1] Université de Bejaia,Laboratoire de Maitrise des Energies Renouvelables, Faculté des Sciences de la Nature et de la Vie
[2] University of Mustapha Stumbouli,Department Agronomy, Laboratory of Research on Biological Systems and Geomantic (L.R.S.B.G)
[3] Université Akli Mohand Oulhadj,Faculté des Sciences de la Nature et de la Vie et des Sciences de la Terre
[4] University of Manouba,Higher Institute for Biotechnology, Laboratory of Biotechnology and Bio
来源
European Journal of Plant Pathology | 2019年 / 153卷
关键词
Plant growth promoting bacteria and ; pv. ; var. ;
D O I
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中图分类号
学科分类号
摘要
The aim of this work was to determine the functional diversity of soil bacteria belonging to the Pseudomonas genus, to study their effects on bean (Phaseollus vulgaris L) seed germination and their biocontrol potential of common bean blight. Bacteria were isolated and identified based on physiological and biochemical characters and BOX-PCR. Followed by qualitative and/or quantitative analysis of their secondary metabolites. 50 soil bacteria were affected to the two groups of fluorescent (72%) and non-fluorescent Pseudomonads (28%). The UPGMA (Unweighted Pair Group Method with Arithmetic Mean) showed five phenons of carbon sources assimilation; at the time that BOX-PCR profiling resulted in five clusters characterized by 29 different haplotypes. (66%) isolates induced phosphate solubilization; (24%) were HCN producers, (21%) showed IAA production and all isolates had produced siderophores. In vitro antibacterial activity against Xapf showed 26.67 and 24 mm of inhibition zone using the two isolates P. grimontii P25 and P. cepatia P7, respectively. Similarly, the same isolates significantly reduced Xapf-bean common blight intensity, while their co-inoculation was less effective. The isolate P. cepatia P7 was highly effective on seed germination and root growth properties, then P. grimontii P25. Thus, the selected isolates could play a crucial bean growth promotion and bean common blight biocontrol as alternative to chemicals for crop yield enhancement.
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页码:397 / 415
页数:18
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