Grapevine responds to smoke extract and plant growth promoting rhizobacteria by producing volatiles terpenes

SALOMON M.V.; VAN STADEN ; BOTTINI R.; PICCOLI P.

Pietermaritzburg

Otro; Researche Centre for Plant Growth and Development Annual Meeting; 2014

University of Kwazulu-Natal

The aim of this work was toinvestigate the combined effect of natural plant growth stimulants (smoke-waterextract) and beneficial soil bacteria (P. fluorescens and B.licheniformis, isolated from roots and rhizosphere of Vitis viniferaL. cv. Malbec) on grapevine growth. The effects of smoke-water dilutions,bacteria suspensions and combined treatments on rooting were examined andaccording to that the treatments applied in the pot assays were selected. Then,plants were grown in greenhouse condition during 60 days and smoke-water andbacteria were applied weekly as a soil drench. As results, a positive effect ofthe non-combined treatments was observed in both rooting and growth parameterscompared with controls (water). The terpenes analysis assessed by Gas Chromatography coupled to Mass Spectrometry showed that alltreatments wereable to induce a systemic respond eliciting mainly the synthesis of the monoterpenes α-pinene and terpinolene, and the sesquiterpenenerolidol inMalbec plants. The increases of this compounds may help grapevine to cope with bothbiotic (pathogen infections) and abiotic (drought, UV-B radiation, high lightand temperatures) stress conditions.