Elementary identification of phenolic allelochemicals from dwarf lilyturf plant (Ophiopogon japonicus K.) and their growth-inhibiting effects for two weeds in paddy rice field

Dwarf lilyturf (Ophiopogon japonicus K), used as a weed-suppressing cover crop and a medicinal plant, was suggested to be a promising natural herbicide to control weeds in the rice field through its allelopathic potential. Allelopathic chemicals from the dwarf lilyturf were identified and their grow...

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Bibliographic Details
Published in:	Plant production science Vol. 7; no. 3; pp. 260 - 265
Main Authors:	Lin, D. (Kagoshima Univ. (Japan)), Tsuzuki, E, Sugimoto, Y, Dong, Y, Matsuo, M, Terao, H
Format:	Journal Article
Language:	English
Published:	Tokyo Taylor & Francis 01-09-2004 Crop Science Society of Japan Taylor & Francis Ltd Taylor & Francis Group
Subjects:	Agricultural practices Agronomy. Soil science and plant productions ALLELOCHEMICALS Allelopathy Barnyardgrass Biological and medical sciences Chemicals Cover crops Dwarf lilyturf ECHINOCHLOA CRUS GALLI Fundamental and applied biological sciences. Psychology General agronomy. Plant production High pressure HPLC IDENTIFICATION LILIACEAE Liquid chromatography Medicinal plants Monchoria Phenols PONTEDERIACEAE RICE FIELDS SALICYLIC ACIDS WEED CONTROL Weeds Echinochloa crus-galli Plant production Growth inhibitor Monocotyledones Weed HPLC chromatography Allelochemicals Monchoria Dwarfism Oryza sativa Barnyardgrass Gramineae Angiospermae Phenols Spermatophyta Paddy field HPLC Dwarf lilyturf
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Summary:	Dwarf lilyturf (Ophiopogon japonicus K), used as a weed-suppressing cover crop and a medicinal plant, was suggested to be a promising natural herbicide to control weeds in the rice field through its allelopathic potential. Allelopathic chemicals from the dwarf lilyturf were identified and their growth-inhibiting effects on two major weeds in the rice field in Japan were examined. High pressure liquid chromatograph (HPLC) analysis showed the existence of at least six allelopathic chemicals, viz., salicylic acid, syringic acid, syringaldehyde, vanillic acid, p-hydroxybenzoic acid and sinapic acid in dwarf lilyturf plant. The chemical detected at the highest concentration was salicylic acid (251.04 micro g g sup(-1)), which occupied more than half of total allelopathic chemicals detected (317.16 micro g g sup(-1)), followed by syringic acid (37.30 micro g g sup(-1)), syringaldehyde(13.30 micro g g sup(-1)) and sinapic acid (11.03 micro g g sup(-1)). The chemicals detected at the lowest concentration was vanillic acid (1.69 micro g g sup(-1)). Salicylic acid displayed the most inhibitory effects on germination and growth of both barnyardgrass (Echinochloa crusgalli L.) and monchoria (Monochoria vaginalis P.). This compound might play a key role in dwarf lilyturf allelopathy
Bibliography:	F60 2005004441 H60
ISSN:	1343-943X 1349-1008
DOI:	10.1626/pps.7.260