New Zealand Journal of Crop and Horticultural Science abstracts

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Phytotoxic effect of aqueous extracts and essential oils from southern marigold (Tagetes minuta)

Seung-yeob Lee

Division of Plant Resources Science
Wonkwang University
Shinruung-dong, Iksan
Chollabuk-do, 570 749
Republic of Korea
email: sylee@wonkwang.ac.kr

Kew-cheol Shim†

Department of Biology Education
Kongju National University
Shinkwan-dong, Kongju
Chungchungnam-do, 314 701
Republic of Korea
email: skcshim@kongju.ac.kr

Ji-hyun Kil

Division of Environmental Ecology
National Institute of Environmental Research
Kyoungseo-dong, Seo-gu
Incheon, 404 170
Republic of Korea
email: kiljh@me.go.kr
†Corresponding author

Abstract   The phytotoxic effects of aqueous extracts and essential oils derived from southern marigold (Tagetes minuta L.), were studied using test species bioassays. The phytotoxic potential of the chemical substances was evaluated on callus induction and growth of four receptor plant species: Oryza sativa (Dongjinbyeo), Brassica campestris subsp. napus var. pekinensis, Raphanus sativus var. acanthiformis, and Sesamum indicum (Ansanggae). The receptor plants were grown on MS (Murashige & Skoog) media supplemented with 2 mg/litre 2,4-D and 0.5 mg/litre kinetin containing aqueous extract and essential oil extracted from T. minuta. The induction of calluses was significantly inhibited proportional to the concentrations of aqueous extract and essential oil used. The callus induction and growth were rapidly decreased in 30 and 50% of original aqueous extract, and in 10 and 20 µl essential oil. The allelopathic potential of aqueous extract from T. minuta may be more than that of essential oil. It was concluded that the inhibitory allelophatic effects of marigold exhibited species-specific inhibitory trends.

Keywords   phytotoxic effect; Tagetes minuta; aqueous extract; callus induction; essential oil; inhibitory potential; species-specificity

H01050 Received 30 October 2001; accepted 2 July 2002; published 25 September 2002
New Zealand Journal of Crop and Horticultural Science, 2002, Vol. 30: 161-169
0014-0671/02/3003-0161 $7.00 © The Royal Society of New Zealand 2002

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