| Title: | Plant growth-promoting and non-promoting rhizobacteria from avocado trees differentially emit volatiles that influence growth of Arabidopsis thaliana |
| Author(s): | Gamboa-Becerra R; Desgarennes D; Molina-Torres J; Ramirez-Chavez E; Kiel-Martinez AL; Carrion G; Ortiz-Castro R; |
| Address: | "Red de Biodiversidad y Sistematica, Instituto de Ecologia A.C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, Mexico. Department of Biotechnology and Biochemistry, CINVESTAV Unidad Irapuato, Km. 9.6 Libramiento Norte Carretera Irapuato-Leon, 36821, Irapuato, Guanajuato, Mexico. Red de Estudios Moleculares Avanzados, Cluster BioMimic(R), Instituto de Ecologia A.C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, Mexico. Red de Biodiversidad y Sistematica, Instituto de Ecologia A.C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, Mexico. gloria.carrion@inecol.mx. Red de Estudios Moleculares Avanzados, Cluster BioMimic(R), Instituto de Ecologia A.C., Carretera Antigua a Coatepec 351, El Haya, 91073, Xalapa, Veracruz, Mexico. randy.ortiz@inecol.mx" |
| DOI: | 10.1007/s00709-021-01705-2 |
| ISSN/ISBN: | 1615-6102 (Electronic) 0033-183X (Linking) |
| Abstract: | "Microbial volatile organic compounds (mVOCs) play important roles in inter- and intra-kingdom interactions, and they are also important as signal molecules in physiological processes acting either as plant growth-promoting or negatively modulating plant development. We investigated the effects of mVOCs emitted by PGPR vs non-PGPR from avocado trees (Persea americana) on growth of Arabidopsis thaliana seedlings. Chemical diversity of mVOCs was determined by SPME-GC-MS; selected compounds were screened in dose-response experiments in A. thaliana transgenic lines. We found that plant growth parameters were affected depending on inoculum concentration. Twenty-six compounds were identified in PGPR and non-PGPR with eight of them not previously reported. The VOCs signatures were differential between those groups. 4-methyl-2-pentanone, 1-nonanol, 2-phenyl-2-propanol and ethyl isovalerate modified primary root architecture influencing the expression of auxin- and JA-responsive genes, and cell division. Lateral root formation was regulated by 4-methyl-2-pentanone, 3-methyl-1-butanol, 1-nonanol and ethyl isovalerate suggesting a participation via JA signalling. Our study revealed the differential emission of volatiles by PGPR vs non-PGPR from avocado trees and provides a general view about the mechanisms by which those volatiles influence plant growth and development. Rhizobacteria strains and mVOCs here reported are promising for improvement the growth and productivity of avocado crop" |
| Keywords: | *Arabidopsis Indoleacetic Acids/pharmacology *Persea/microbiology Plant Development Trees *Volatile Organic Compounds Bacterial volatiles Persea americana Plant growth Rhizobacteria Volatiles signalling; |
| Notes: | "MedlineGamboa-Becerra, Roberto Desgarennes, Damaris Molina-Torres, Jorge Ramirez-Chavez, Enrique Kiel-Martinez, Ana L Carrion, Gloria Ortiz-Castro, Randy eng grant no. 42002/Asociacion de Productores y Empacadores Exportadores de Aguacate de Mexico A.C. (APEAM)/ grant no. PDCPN-2015-882/consejo nacional de ciencia y tecnologia (conacyt, mexico)/ FORDECYT-PRONACES 292399/consejo nacional de ciencia y tecnologia (conacyt, mexico)/ Austria 2021/09/17 Protoplasma. 2022 Jul; 259(4):835-854. doi: 10.1007/s00709-021-01705-2. Epub 2021 Sep 16" |
