Impact of Plant Growth-Promoting Rhizobacteria Inoculation and Grafting on Tolerance of Tomato to Combined Water and Nutrient Stress Assessed via Metabolomics Analysis

0106 biological sciences 0301 basic medicine 2. Zero hunger Plant culture hydroponics Plant Science tomato 15. Life on land grafting metabolomics 01 natural sciences 6. Clean water SB1-1110 water stress 03 medical and health sciences PGPR M82 biostimulant
DOI: 10.3389/fpls.2021.670236 Publication Date: 2021-06-04T16:30:50Z
ABSTRACT
In the current study, inoculation with plant growth-promoting rhizobacteria (PGPR) and grafting were tested as possible cultural practices that may enhance resilience of tomato to stress induced by combined water nutrient shortage. The roots grown on perlite either inoculated or not PGPR, applying four different treatments. These PGPR-T1, a mix two Enterobacter sp. strains (C1.2 C1.5); PGPR-T2, Paenibacillus strain DN1.2; PGPR-T3, mori C3.1; PGPR-T4, Lelliottia D2.4. PGPR-treated plants self-grafted grafted onto Solanum lycopersicum cv. M82 received full 50% their standard water, nitrogen, phosphorus needs. vegetative biomass subjected PGPR-T1 was reduced when cultivated under stress, while it rest PGPR However, PGPR-T3 increased considerably non-stressed than did all other application had no impact fruit biomass, ’M82’ production self-grafting. Metabolomics analysis in leaves revealed affects several metabolites, most them already described stress-related, including trehalose, myo-inositol, monopalmitin. inoculati o n E. C3.1 affected which are important for plant/microbe symbiosis (myo-inositol monopalmitin). rootstock affect many metabolites leaves, but clearly decreased levels malate D -fructose imposed an accumulation oleic acid. conclusion, capable increasing tolerance stress. further research is required evaluate more refine protocols application. Metabolites discovered biomarkers could be used accelerate screening process traits such abiotic and/or stresses. Finally, ‘M82’ suitable tomato, production.
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