« Previous AbstractAir Pollutants Removal Using Biofiltration Technique: A Challenge at the Frontiers of Sustainable Environment    Next Abstract"Behaviour: smells, brains and hormones" »

Microbiol Res

Title:		Genetic analysis of plant endophytic Pseudomonas putida BP25 and chemo-profiling of its antimicrobial volatile organic compounds
Author(s):		Sheoran N; Valiya Nadakkakath A; Munjal V; Kundu A; Subaharan K; Venugopal V; Rajamma S; Eapen SJ; Kumar A;
Address:		"Division of Plant Pathology, ICAR - Indian Agricultural Research Institute, New Delhi, India. Division of Crop Protection, ICAR - Indian Institute of Spices Research, Kozhikode, India. Division of Agricultural Chemicals, ICAR - Indian Agricultural Research Institute, New Delhi, India. Division of Crop Protection, ICAR - Central Plantation Crops Research Institute, Kasaragod, India. Division of Plant Pathology, ICAR - Indian Agricultural Research Institute, New Delhi, India. Electronic address: kumar@iari.res.in"
Journal Title:		Microbiol Res
Year:		2015
Volume:		20150217
Issue:
Page Number:		66 - 78
DOI:		10.1016/j.micres.2015.02.001
ISSN/ISBN:		1618-0623 (Electronic) 0944-5013 (Linking)
Abstract:		"Black pepper associated bacterium BP25 was isolated from root endosphere of apparently healthy cultivar Panniyur-5 that protected black pepper against Phytophthora capsici and Radopholus similis - the major production constraints. The bacterium was characterized and mechanisms of its antagonistic action against major pathogens are elucidated. The polyphasic phenotypic analysis revealed its identity as Pseudomonas putida. Multi locus sequence typing revealed that the bacterium shared gene sequences with several other isolates representing diverse habitats. Tissue localization assays exploiting green fluorescence protein expression clearly indicated that PpBP25 endophytically colonized not only its host plant - black pepper, but also other distantly related plants such as ginger and arabidopsis. PpBP25 colonies could be enumerated from internal tissues of plants four weeks post inoculation indicated its stable establishment and persistence in the plant system. The bacterium inhibited broad range of pathogens such as Phytophthora capsici, Pythium myriotylum, Giberella moniliformis, Rhizoctonia solani, Athelia rolfsii, Colletotrichum gloeosporioides and plant parasitic nematode, Radopholus similis by its volatile substances. GC/MS based chemical profiling revealed presence of Heneicosane; Tetratetracontane; Pyrrolo [1,2-a] pyrazine-1,4-dione, hexahydro-3-(2-methylpropyl); Tetracosyl heptafluorobutyrate; 1-3-Eicosene, (E)-; 1-Heneicosanol; Octadecyl trifluoroacetate and 1-Pentadecene in PpBP25 metabolite. Dynamic head space GC/MS analysis of airborne volatiles indicated the presence of aromatic compounds such as 1-Undecene;Disulfide dimethyl; Pyrazine, methyl-Pyrazine, 2,5-dimethyl-; Isoamyl alcohol; Pyrazine, methyl-; Dimethyl trisulfide, etc. The work paved way for profiling of broad spectrum antimicrobial VOCs in endophytic PpBP25 for crop protection"
Keywords:		Anti-Infective Agents/*chemistry/metabolism/pharmacology Endophytes/chemistry/*genetics/isolation & purification/metabolism Fungi/drug effects/growth & development Molecular Sequence Data Phylogeny Phytophthora/drug effects/growth & development Piper nigr;
Notes:		"MedlineSheoran, Neelam Valiya Nadakkakath, Agisha Munjal, Vibhuti Kundu, Aditi Subaharan, Kesavan Venugopal, Vibina Rajamma, Suseelabhai Eapen, Santhosh J Kumar, Aundy eng Research Support, Non-U.S. Gov't Germany 2015/03/25 Microbiol Res. 2015 Apr; 173:66-78. doi: 10.1016/j.micres.2015.02.001. Epub 2015 Feb 17"