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Plant growth-promoting rhizobacteria act as biostimulants in horticulture

AutorRuzzi, Maurizio; Aroca, Ricardo
Palabras claveVolatiles organic compounds
Abiotic stress
Fecha de publicación2015
CitaciónScientia Horticulturae 196: 124- 134 (2015)
ResumenTo overcome the challenge of increasing food production with a significant reduction of agrochemical use and environmental pollution, and an increase of natural resource productivity, the use of soil microorganisms in horticulture is essential. One group of microorganisms consists of plant growth-promoting rhizobacteria (PGPR), which have been studied from the beginning of the twentieth century and their mode of action at the physiological level is currently well understood. PGPR mechanisms include hormone release or hormonal changes within plants, the production of volatile organic compounds, the improvement in the availability of nutrients and the enhancement of tolerance to abiotic stresses. All these mechanisms are described in the present review. However, to maximize the effects of these mechanisms, the proper PGPR strain needs to be selected in each soil-plant-PGPR system and the mode of inoculation must be optimized in both greenhouse and open-field experiments. This review summarizes recent progress in our understanding of the PGPR-plant interaction and highlights future lines of research that should increase our knowledge on plant-bacterial communication and that can help to improve the effective use of PGPR in horticulture.
Identificadoresdoi: 10.1016/j.scienta.2015.08.042
issn: 0304-4238
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