Pseudomonas fluorescens Rt6M10 and Azospirillum brasilense AZ39 inoculation increases yield and fruit quality of two tomato varieties for industry

PÉREZ RODRIGUEZ, MARÍA MICAELA; PONTÍN MARIELA; LIPINSKI, VICTOR; ALANIZ, CECILIA; GARCÍA ESCOBAR, IVÁN; BOTTINI, RUBÉN; PICCOLI, PATRICIA; COHEN, ANA CARMEN

Foz Iguazú

Congreso; XVI Symposium on Biological nitrogen fixation with non-legumes IV Latinoamerican Workshop of PGPR. XIX RELARE; 2018

Embrapa

Pseudomonas fluorescens Rt6M10 and Azospirillum brasilense AZ39inoculation increases yield and fruit quality of two tomato varieties forindustryPérez-Rodriguez, M1*; Pontin M1-2; Lipinski, V1-2; Alaniz, C1; García Escobar, I1; Bottini,R1, Piccoli, P1; Cohen, A. C1.1IBAM-FCA (CONICET-UNCUYO). Almirante Brown 500, (5505) Chacras de Coria,Mendoza, Argentina; 2EEA La Consulta-INTA Ex Ruta 40, Km 96. (5567) La Consulta,San Carlos Mendoza, Argentina. Email: micaperezr90@gmail.comTomato (Solanum lycopersicum, L) is one of the most important and widely distributedhorticultural vegetable crops in the world. During 2016 and 2017 season Argentinareached the historical record of 77 ton ha -1. Mendoza is one of the major industrytomato producers, but the internal market demand of the country is still unsatisfied.Fertirrigation is necessary for the crop development, however, overuse of fertilizerscause environmental problems. The objective of this work was to evaluate the effect oftomato root inoculation with P. fluorescens Rt6M10 and A. brasilense Az39 on yieldand fruit quality of two varieties of industrial tomato in a field trial. Uco 14 and HarrisMoran 3861 were the selected tomato varieties. Seedlings with two fully expanded trueleaves were bacterized and the treatments were: 1) Rt6M10, 2) Az39, 3) consortium(Rt6M10+ Az39), 4) fertilized, 5) control (without bacteria). Forty days old plants weretransplanted to the field and drip irrigated. Ninety days after transplant, steam diameter,photochemical efficiency of photosystem II and chlorophyll relative amount wereevaluated. The yield, size and quality of the fruit were also evaluated at the time ofharvest. Inoculation increased the stem diameter, the number and fresh weight of fruitsper plant; as well as the equatorial and polar fruit diameter in both varieties. Also,inoculation increased pH and decreased titulable acidity in both varieties. However,only the soluble solids of Uco 14 fruits were increased with the inoculations. The resultsof the work suggest that Rt6M10 or Az39 inoculation could be useful to reduce the useof chemical fertilizer, maintaining and even improving the industrial tomato yield andquality. This can lead to economical and envirnomental benefits in a sustainableagriculture.Keywords: PGPR, industrial tomato, root inoculationFinancial Support: SECTYP UNCUYO, PIP CONICET, PICT (ANPCyT).