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Strains 42P4 and 60I1 alleviate NaCl stress in pepper plants
LOBATO URECHE, MIGUEL ANDRÉS; PÉREZ-RODRIGUEZ, MARÍA MICAELA; MONASTERIO, ROMINA PAULA; COHEN, ANA CARMEN
Congreso; XXXIII Argentinian meetign of plant physiology; 2021
Sociedad Argentina de Fisiología Vegetal
Strains 42P4 and 60I1 alleviate NaCl stress in pepper plantsLobato M.A1; Pérez-Rodriguez M.M1; Monasterio R.P1; Cohen A.C11IBAM-Universidad Nacional de Cuyo, Facultad de Ciencias Agrarias (CONICET-UNCUYO).E-mail: firstname.lastname@example.org, email@example.comEnvironmental stresses have an important role in crop yields of pepper grown in Argentina. Soil salinity is an important agricultural problem in irrigated soil as Mendoza; besides, most crops are sensitive to salinity. Salt stress limits plant growth and development leading to a reduction in crop productivity of pepper. There are numerous reports about the beneficial effects of rhizosphere microorganisms on plant growth. This group including plant growth-promoting rhizobacteria named PGPR. In general, PGPR can improve plant development by producing secondary metabolites as plant growth regulators or phenolic compounds and improving the availability of nutrients such as nitrogen, phosphorus and potassium. The main of this study was to evaluate the effect of the inoculation of pepper plants under saline stress with two native strains isolated from Mendoza. The assay was carried out under greenhouse conditions. A triplicate of randomized design of 5 treatments was established, with 10 plants by treatment. The treatments were: 1) Control, 2) 42P4 + NaCl, 3) 60I1 + NaCl and 4) NaCl. Plants under saline stress were watered with a 150 mM NaCl solution. During the development of the experiment morphological, physiological and biochemical variables were evaluated. The results showed that the 42P4 and 60I1 strains alleviate saline stress by increasing plant height, stem diameter, photosynthetic efficiency, chlorophyll index (SPAD), aerial, and root dry weight, photosynthetic pigment content, and phenolic compound. The results suggest that 42P4 and 60I1 are two native PGPR that alleviating the negative effects of salinity on pepper plants.