Published in Scientific Bulletin. Series F. Biotechnologies, Vol. XXV, Issue 2
Written by Elena UȚOIU, Iulia RĂUT, Florin OANCEA
The alcoholic extracts from Passiflora caerulea leaves protect prebiotic lactic acid bacteria (LAB) against oxidative stress induced by (micro) aerobic conditions. This prebiotic activity is mainly related to the polyphenols accumulated in P. caerulea leaves. Polyphenols are used by prebiotic LAB as electron acceptors of their carbohydrate catabolic chains and promote LAB adaptation to aerobic conditions. Foliar treatment with 108 cfu per ml chlamydospores of a Trichoderma plant biostimulants consortium enhances the accumulation of polyphenols in the P. caerulea leaves. The Trichoderma plant biostimulant consortium includes two strains, T. asperellum T36b, and T. harzianum Td50b. Enhanced levels of polyphenols are related to the enhanced prebiotic effect of the extracts from leaves treated with Trichoderma consortium, compared with the control leaves from P. caerulea non-treated with plant biostimulants. The results are discussed in relation to the known physiological effects of P. caerulea leaves extracts on mood and sleep disorders, which could also be explained by the probiotic bacteria's postbiotic effects, promoted by polyphenols from leaves extracts.
[Read full article] [Citation]
