TITLE

Comparative response of essential oil composition, antioxidant activity and phenolic contents spearmint (Mentha spicata L.) under protected soilless vs. open field conditions

AUTHOR(S)
Al-Tawaha, Abdelrazzaq; Al-Karaki, Ghazi; Massadeh, Adnan
PUB. DATE
May 2013
SOURCE
Advances in Environmental Biology;May2013, Vol. 7 Issue 5, p902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Spearmint oil has an economical importance and it was used in perfumery, confectionary, and pharmaceutical industrial. Essential oil accumulation and compositions of aromatic plants has been reported to be affected by cultivation method like soilless vs. soil-based cultivations. The objective of this study was to compare essential oil content and composition, antioxidant activity by free radical scavenging activity (antiradical), total phenols as mg Gallic acid equivalents (GAE)/g and flavonoids as mg Catechin Equivalent (mg CE/g of dry weight) in the aerial parts of a spearmint (Mentha spicata L.) under protected soilless vs. open field conditions. Results of this study showed that essential oil contents of spearmint varied under protected soilless condition (3.43%) which higher than that obtained under open field (soil- based) conditions (3.14%). The major compounds found in essential oils of spearmint plant were 1,8 cineole and pulegone under both cultivation method. Moreover, essential oil composition was varied under both cultivation methods where 1,8 cineole concentration was (32.9 μg/g) under open field conditions, which is significantly high than that under protected soilless conditions (10.6 μg/g). Pulegone was the other major compounds of volatile oils of spearmint which varied from (44.4 μg/g) under protected soilless conditions which significant than that under open field conditions (20.7 μg/g). On the other part of analysis in this study, the phenolic contents and the antioxidant activity of plant extract were determined, by Folin-Ciocalteau and the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assays respectively. Phenolic content of whole spearmint plant was significantly (223 mg GAE/g DW) under open field conditions than that under protected soilless condition (114 mg GAE/g DW). Antiradical of leaves part under open field conditions was 8.7mg/g which is highly significant than antiradical of leaves under protected soilless condition which was 4.5 mg/g. The presence of total flavonoids of spearmint plant were (149 mg CE/g) under open field conditions which significance high than that under protected soilless conditions (73 mg CE/g).These results showed that M. spicata essential oil and extract was affected by cultivation conditions and environmental factors.
ACCESSION #
90474724

 

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