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Microbiol Res

Title:		Volatiles emitted by Bacillus sp. BCT9 act as growth modulating agents on Lactuca sativa seedlings
Author(s):		Fincheira P; Parra L; Mutis A; Parada M; Quiroz A;
Address:		"Programa de Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Temuco, Chile. Centro de Excelencia en Investigacion Biotecnologica Aplicada al Medio Ambiente (CIBAMA), Facultad de Ingenieria y Ciencias, Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco, Chile; Departamento de Ciencias Quimicas y Recursos Naturales, Facultad de Ingenieria y Ciencias, Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco, Chile. Centro Biotecnologico de Estudios Microbianos (CEBEM), Universidad de La Frontera. Temuco, Chile. Centro de Excelencia en Investigacion Biotecnologica Aplicada al Medio Ambiente (CIBAMA), Facultad de Ingenieria y Ciencias, Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco, Chile; Departamento de Ciencias Quimicas y Recursos Naturales, Facultad de Ingenieria y Ciencias, Universidad de La Frontera, Av. Francisco Salazar 01145, Temuco, Chile. Electronic address: andres.quiroz@ufrontera.cl"
Journal Title:		Microbiol Res
Year:		2017
Volume:		20170711
Issue:
Page Number:		47 - 56
DOI:		10.1016/j.micres.2017.06.007
ISSN/ISBN:		1618-0623 (Electronic) 0944-5013 (Linking)
Abstract:		"Chemical products are applied during horticulture to increase food production, but the environmental problems resulting from these applications have led to a search for more sustainable products. Volatile organic compounds (VOCs) demonstrating plant growth promoter (PGP) activity released by bacterial species have emerged as alternatives, but their effects on Lactuca sativa growth are unknown. In this study, VOCs released by Bacillus sp. BCT9 cultures grown in different media (Methyl Red & Voges Proskauer, Murashige & Skoog and nutrient media) at concentrations of 0.1, 0.2, 0.5 and 0.7 (measured as the absorbance, lambda=600nm) were tested to evaluate their activity as growth inducers of L. sativa after 10days of exposure. Lower concentrations of BCT9 increased root length, and higher concentrations induced shoot length and lateral root length. The dry weight and number of lateral roots increased similarly, independent of concentration, for VOCs produced in all culture media. BCT9 cultures grown in Methyl Red & Voges Proskauer medium as bioactive compounds with or without lanolin. These VOCs increased shoot length, root length and dry weight at low concentrations, independent of the presence of lanolin. Lateral root length increased with the application of 2-nonanone (50ppm) and 2-undecanone (0.05ppm). Based on these results, the use of bioactive volatiles as growth inducers of horticultural species represents an alternative or complementary strategy"
Keywords:		Bacillus/*metabolism Ketones/pharmacology Lettuce/*growth & development Plant Roots/*growth & development Seedlings/*growth & development Volatile Organic Compounds/metabolism/*pharmacology Bacterial concentration Culture conditions Growth inducers Volati;
Notes:		"MedlineFincheira, Paola Parra, Leonardo Mutis, Ana Parada, Maribel Quiroz, Andres eng Germany 2017/07/30 Microbiol Res. 2017 Oct; 203:47-56. doi: 10.1016/j.micres.2017.06.007. Epub 2017 Jul 11"