Bacteria and smoke-water extract improve growth and induce the synthesis of volatile defense mechanisms in Vitis vinifera L.

SALOMON, MARÍA VICTORIA; PICCOLI, PATRICIA; FUNES PINTER IVÁN; STIRK, WENDY ANN; KULKARNI, MANOJ; VAN STADEN, JOHANNES; BOTTINI, RUBÉN

PLANT PHYSIOLOGY AND BIOCHEMISTRY

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

Año: 2017

0981-9428

Sustainable agricultural practices have been developed as alternativeto the use of agrochemicals, and viticulture is not exempt of that. Plantgrowth promoting rhizobacteria (PGPR) and smoke water extracts (SW) areenvironmentally-friendly alternative to those agrochemicals. The aim of thisstudy was to investigate the single or combined effects of SW and the PGPR Pseudomonasfluorescens (Pf) and Bacillus licheniformis (Bl) on thephysiology and biochemistry of grapevines plants. After 38 days, singleapplications of SW solutions and bacterial suspensions increase rooting androot length. Combined treatments had a slight positive effect compared to thewater control. At the end of 60-days pot trial, grapevine treated with 1:1000SW and Pf applied alone showed increases in stem length, leaf area andfresh weight of the roots, shoot and leaves, although not significantlydifferences from the water control were found. In addition, Pf augmentedchlorophyll relative content, all treatments decreased the stomatal conductance(mainly 1:500 SW, Pf and 1:1000 SW + Bl), as well as lipidperoxidation in roots (mainly in bacterial treatments), and induced thesynthesis of mono and sesquiterpenes in leaves, where the effect was enhancedin combined treatments. In conclusion, PGPR and SW are effective to improvegrowth of V. vinifera cuttings as well as to increase the plants defensemechanisms that may help them to cope with biotic and abiotic stresses.