Accumulation of secondary metabolites in response to antioxidant activity of turmeric rhizomes co-inoculated with native arbuscular mycorrhizal fungi and plant growth promoting rhizobacteria

作者：Dutta Shanti Chaya; Neog Bijoy

来源：Scientia Horticulturae, 2016, 204: 179-184.

DOI：10.1016/j.scienta.2016.03.028

• Curcuma longa L.
• Bio-inoculants
• Antioxidant activity
• Flavonoids
• Phenolic contents
• Curcumin content

The present study was aimed at investigating the therapeutic potential of methanol crude extract of turmeric (Curcuma longa L.) rhizome co-inoculated with native arbuscular mycorrhizal fungi (Glomus, Gigaspora and Acaulospora sp.), phosphate solubilizer Bacillus megaterium and diazotrophic bacteria, Azospirillum amazonense and Azotobacter sp. To achieve the goals, parameters like free-radical (DPPH, ABTS) scavenging capacity, total phenolic contents, total flavonoids contents and percentage of cur cumin content were examined. A significant increase of these secondary metabolites were observed in inoculated plants compared to non-inoculated controls revealing strong antioxidant activities of turmeric against DPPH and ABTS radicals in the range of 80-97%. The high amount of flavonoids (179.07-493.15 mg RE g(-1)), phenolic contents (83.07-151.54 mg GAE g(-1)) and percentage of curcumin (4.81-6.09%) present in all the methanolic extracts of dried rhizomes might be responsible for the observed antioxidant activity.

• 出版日期2016-6-2