INVESTIGATION OF LAVANDULA ANGUSTIFOLIA MILL. EXTRACTS AS ANTI-ESCHERICHIA COLI AGENTS AND MICROBIAL ADDITIVES: ARE THEY AN ALTERNATIVE TO ENRICHMENT, DECONTAMINATING AND DEODORIZING AGENTS FOR ORGANIC SOIL IMPROVERS?

Malcheva, Boyka and Naskova, Pavlina and Grigorova-Pesheva, Bilyana and Plamenov, Dragomir and Yordanova, Milena and Kostadinova-Slaveva, Alexandrina and Blazhekovikj - Dimovska, Dijana and Nikolov, Dimitar (2024) INVESTIGATION OF LAVANDULA ANGUSTIFOLIA MILL. EXTRACTS AS ANTI-ESCHERICHIA COLI AGENTS AND MICROBIAL ADDITIVES: ARE THEY AN ALTERNATIVE TO ENRICHMENT, DECONTAMINATING AND DEODORIZING AGENTS FOR ORGANIC SOIL IMPROVERS? Soil Science Annual, 75 (1).

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Abstract

Microfl ora composition and antibacterial effect against Escherichia coli of plant extracts from
different parts of Lavandula angustifolia and with different solvents were analyzed to determine
variants to be used as microbial additives for enrichment with benefi cial microfl ora, decontami�nation and deodorization of composts contaminated with E. coli. The highest total quantity of
microorganisms was found in the decoction variant (whole plant and roots), and the lowest in the
tincture variant (whole plant). The quantity of non-sporulating bacteria predominates in most
variants. A signifi cant increase of actinomycetes was found in the tincture and medical vinegar
variants. The acidifi cation of the environment leads to an increase in the quantity of mold fungi in
the medicinal vinegar. Antibacterial effect against Esherichia coli for three tested strains (NMIM�CC 3397 (WDCM 00012; ATCC 8739), NMIMCC 3398 T (WDCM 00090; ATCC 11775), NMIMCC 8905
(ATCC 35218)) was similar for the individual plant parts and the same for variants with whole
plants. Lavender extracts, medicinal vinegar variant (individual plant parts and whole plant),
as well as a decoction variant with a whole plant, showed stronger antibacterial activity against
Escherichia coli. The concentration of all parts of the plant in “whole plant” extracts increased
antibacterial activity compared to extracts with a concentration from a single specifi c part of the
plant (roots, leaves, stems). Antibacterial activity against Escherichia coli remained lower even
when whole plant was used for medicinal wine and medicinal oil variants. The choice of solvent
probably has some effect on the diameter of the growth inhibition zone. The addition of Laven�der extract (decoction variant, whole plant) to compost variants increased the quantity of non�pathogenic microfl ora in them. At the same time, the composts were decontaminated from the
presence of Escherichia coli. The composts smelled of soil and lavender. The antibacterial effect
of the lavender extract (decoction variant) against Escherichia coli strongly positively depends
on the quantity of non-pathogenic microfl ora in it and in the composts after its application. The
studied lavender plant extracts (best variant decoction, whole plant) can be applied as microbial
additives, disinfectants against Escherichia coli and deodorizers of composts.

Item Type:	Article
Subjects:	Scientific Fields (Frascati) > Agricultural Sciences > Agricultural biotechnology Scientific Fields (Frascati) > Natural sciences > Biological sciences
Divisions:	Faculty of Biotechnical Sciences
Depositing User:	Prof. d-r Dijana Blazhekovikj - Dimovska
Date Deposited:	13 Aug 2024 13:04
Last Modified:	13 Aug 2024 13:04
URI:	https://eprints.uklo.edu.mk/id/eprint/10145

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