AUTHOR=Araújo Neilton Antonio Fiusa , Brandão Rafaela Magalhães , Barguil Beatriz Meireles , Cardoso Maria das Graças , Pasqual Moacir , Rezende Renata Alves Lara Silva , Pereira Maysa Mathias Alves , Buttrós Victor Hugo Teixeira , Dória Joyce 

TITLE=Plant Growth-Promoting Bacteria Improve Growth and Modify Essential Oil in Rose (Rosa hybrida L.) cv. Black Prince

JOURNAL=Frontiers in Sustainable Food Systems

VOLUME=Volume 4 - 2020

YEAR=2020

URL=https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2020.606827

DOI=10.3389/fsufs.2020.606827

ISSN=2571-581X

ABSTRACT=Rose essential oil is rich in compounds widely used by the pharmaceutical and cosmetic industry, due to the biological activities it presents. However, obtaining oil is costly, as the yield per plant is low, which requires several techniques that aim to increase its production. The application of growth-promoting bacteria has been studied for this purpose. Thus, the objective of this work was to select efficient bacteria for production and evaluate their influence on the composition of the essential oils of roses. Seven bacteria were evaluated for the potential to promote growth in vitro, being tested for nitrogen fixation, phosphate solubilization, protease production and auxin production. From bacteria tested, four were selected and inoculated on rose plants of cultivar ‘Príncipe Negro’ to evaluate the influence on oil production. The evaluation of the production of roses was performed through the characteristics of the floral flowers (size, weight and diameter of the stem) and characteristics of the floral bud. The essential oils from the inoculated flowers were extracted and evaluated in terms of content, yield and chemical composition. The application of Bacillus acidiceler and Bacillus pumilus increased the size of flower and flower stems. Bacillus pumilus also increased the weight of fresh petals and essential oil yield, changing the chemical composition of the extracted essential oil. Thus, it is concluded that B. pumilus and B. subtilis improved the production of roses. B. pumilus increased the essential oil content as well as positively changed the chemical composition of the extracted essential oil.