Arbuscular mycorrhizal fungi and plant growth-promoting pseudomonads improve yield, quality and nutritional value of tomato: a field study
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The aim of this work was to assess the effects of plant-beneficial microorganisms (two Pseudomonas strains and a mixed mycorrhizal inoculum, alone or in combination) on the quality of tomato fruits of plants grown in the field and subjected to reduced fertilization. Pseudomonas strain 19Fv1T was newly characterized during this study. The size and quality of the fruits (concentration of sugars, organic acids and vitamin C) were assessed. The microorganisms positively affected the flower and fruit production and the concentrations of sugars and vitamins in the tomato fruits. In particular, the most important effect induced by arbuscular mycorrhizal (AM) fungi was an improvement of citric acid concentration, while bacteria positively modulated sugar production and the sweetness of the tomatoes. The novelty of the present work is the application of soil microorganisms in the field, in a real industrial tomato farm. This approach provided direct information about the application of inocula, allowed the reduction of chemical inputs and positively influenced tomato quality.
KeywordsTomato PGPB Pseudomonads Arbuscular mycorrhizae Fertilization Fruit quality
This research was funded by the Regione Piemonte, within the programme POR-FESR 2007–2013—Project title: “Realizzazione di un sistema integrato innovativo di tecnologie di campo, hardware e software per l’ottimizzazione della gestione parametrizzata di nutrizione e irrigazione delle piante, sinergizzato al supporto eco-orientato delle coltivazioni con materiali biodegradabili e/o a completa metabolizzazione da parte della rizosfera” (Bi.R.S-OASIS).
The authors would thank Donata Vigani and Giuliano Bonelli for the help during the harvesting of tomato fruits and Patrizia Cesaro for the useful suggestions.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
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