Repositorio UFRO · Omeka S

Inoculation with Actinobacteria spp. Isolated from a Hyper-Arid Environment Enhances Tolerance to Salinity in Lettuce Plants (Lactuca sativa L.)

Primer Autor	Santander, Christian
Co-autores	Gonzalez, Felipe Ruiz, Antonieta Perez, Rodrigo Moreira, Jorge Vidal, Gladys Aroca, Ricardo Santos, Cledir Cornejo, Pablo
Título	Inoculation with Actinobacteria spp. Isolated from a Hyper-Arid Environment Enhances Tolerance to Salinity in Lettuce Plants (Lactuca sativa L.)
Editorial	MDPI
Revista	PLANTS-BASEL
Lenguaje	en
Resumen	Irrigated agriculture is responsible for a third of global agricultural production, but the overuse of water resources and intensification of farming practices threaten its sustainability. The use of saline water in irrigation has become an alternative in areas subjected to frequent drought, but this practice affects plant growth due to osmotic impact and excess of ions. Plant-growth-promoting rhizobacteria (PGPR) can mitigate the negative impacts of salinity and other abiotic factors on crop yields. Actinobacteria from the hyper-arid Atacama Desert could increase the plant tolerance to salinity, allowing their use as biofertilizers for lettuce crops using waters with high salt contents. In this work, rhizosphere samples of halophytic Metharme lanata were obtained from Atacama Desert, and actinobacteria were isolated and identified by 16S gene sequencing. The PGPR activities of phosphate solubilization, nitrogen fixation, and the production of siderophore and auxin were assessed at increasing concentrations of NaCl, as well as the enhancement of salt tolerance in lettuce plants irrigated with 100 mM of NaCl. Photosynthesis activity and chlorophyll content, proline content, lipid peroxidation, cation and P concentration, and the identification and quantification of phenolic compounds were assessed. The strains S. niveoruber ATMLC132021 and S. lienomycini ATMLC122021 were positive for nitrogen fixation and P solubilization activities and produced auxin up to 200 mM NaCl. In lettuce plants, both strains were able to improve salt stress tolerance by increasing proline contents, carotenoids, chlorophyll, water use efficiency (WUE), stomatal conductance (gs), and net photosynthesis (A), concomitantly with the overproduction of the phenolic compound dicaffeoylquinic acid. All these traits were positively correlated with the biomass production under saltwater irrigation, suggesting its possible use as bioinoculants for the agriculture in areas where the water resources are scarce and usually with high salt concentrations.
Fecha Publicación	2023
Tipo de Recurso	artículo original
doi	10.3390/plants12102018
Formato Recurso	PDF
Palabras Claves	Atacama Desert Metharme lanata saline water plant-growth-promoting bacteria phenolic compounds
Ubicación del archivo	http://dx.doi.org/10.3390/plants12102018
Categoría OCDE	Ciencias de las plantas
Materias	Desierto de Atacama Metarme lanata agua salina bacterias promotoras del crecimiento de las plantas Compuestos fenólicos
Identificador del recurso (Mandatado-único)	artículo original
Versión del recurso (Recomendado-único)	versión publicada
License	CC BY 4.0
Condición de la licencia (Recomendado-repetible)	CC BY 4.0
Derechos de acceso	acceso abierto
Access Rights	acceso abierto
Id de Web of Science	WOS:000997109700001
Tipo de ruta	verde# dorado
Categoría WOS	Ciencias de las plantas
Referencia del Financiador (Mandatado si es aplicable-repetible)	ANID 21221225 ANID-FONDECYT 3210588 ANID-FONDECYT 1210964 ANID-FONDECYT 1230587 ANID-FONDECYT 1221024 ANID-FONDAP 15130015 MINEDUC InES19-FRO1900 ANID FONDECYT 3210588 ANID FONDECYT 1210964 ANID FONDECYT 1230587 ANID FONDECYT 1221024 ANID FONDAP 15130015