Guo, Jixun

Han, Defu

Hu, Yongjun

Tian, Shangyi

Zhou, Tian

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Allelopathic Effect of Volatile Oil of Artemisia scoparia Tian Zhou Maoming University, China Yongjun Hu Northeast Normal University, China Defu Han Northeast Normal University, China Shangyi Tian Northeast Normal University, China Jixun Guo Northeast Normal University, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/16-1/44 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 ]842　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands Production Systems——— Integrated Management of Harmful Organisms of Grasslands/RangelandsAllelopathic effect of volatile oil of Artemisia scopariaTian Zhou1 ,2 , Yong j un Hu2 ,3 ,De f u H an2 ,3 ,Shangyi T ian2 Jixun Guo21 College o f Chemistry and L i f e Science , Maoming University ,Maoming 525000 ,China . 2 Institute o f G rassland ScienceNortheast Normal University , K ey L aboratory o f Vegetation Ecology , MOE , P .R . China . Changchun , 130024 , China .3 Department o f Biology , Changchun Normal College , Changchun , 130032 , China . E‐mail : g j ixun＠ nenu .edu .cnKey words : A rtemisia scoparia , volatile oil , allelopathyIntroduction Alleopathy is defined as a process involving secondary metabolites produced by plants , micro‐organisms , viruses ,and fungi that influences grow th and development of biological systems . Allelopathy is a new marginal area of ecological andchemical research . A rtemisia scoparia , an annual or biannual herbaceous plant with a strong smell , is widely distributed infields , roadsides and wastelands in China . It can be observed in symbiotic communities with other plants , but always withcomparative advantage where the grow th of other plants is inhibited . The purpose of this study was to investigate whether theallelopathy have some function in the formation and successions of A . scop arias communities . A . scoparia containsconsiderable volatile oils , the main compositions of which are usually terpene compounds which impart important allelopathicproperties . In this study , the compositions of A . scoparia volatile oils were analyzed . Gramineae , Cruciferae and Leguminosaeplants were used as controls to to investigate the allelopathic effects of A . scop aria volatile oil on seed germination and thegrow th of roots and shoots of germinants . The objectives were to evaluate the chemical ecology of A . scoparia , in an effort toreduce the influence of A . scoparia to other plants .Materials and methods Fresh stems and leaves of Artemisia scoparia were cut into ２cm sections and dried . The yellow volatile oilwas extracted by vapor distillation , and analyzed with GC and GC/MS .Results The results showed A . scoparia volatile oil had different degrees of inhibition to the seed germination of radish , clover ,Chinese cabbage and maize . The germination of radish seed was inhibited obviously , the final germination rate of volatile oilgroup is ７２％ only , and ２７ .３％ lower than control group . In germination experiment of the corn seed , volatile oil group had noobvious difference compared with control group . The volatile oil had different degrees inhibition to the grow th of shoots androots of germinants of four tested species , and reduced the elongation of shoots and roots of germinants . The inhibition on thegrow th of shoots and roots of clover was the most obvious , their length decreased ３２ .７ and ５０ .４％ compared with controlgroup respectively . The inhibition on the corn was not obvious . It is proved that the different family plants have differentresistance to allelopathic substance . The mean yield of the volatile oil was ０ .３８％ ( V /DW) . ３７ species of compounds wereidentified and constituted ８６ .９０％ of the total mass . There were １２ species of terpene compounds , which were the maincomponents and constituted ４５ .０４％ of the volatile oil from Artemisia scoparia . The contents of １０ chemical components weremore than １畅５％ as : ２畅５‐Etheno [ ４畅２畅２ ] propella‐３ , ７ , ９‐triene , Spathulenol , Caryophyllene , eugenol methyl ether ,Caryophylleneoxide , Capillin , ＋ /‐ .‐trans‐Nerolidol , ⑻ beta‐Farnesene , ２‐methyl‐６‐p‐tolyl‐hept‐２‐ene and Germacrene .Conclusions There are some relations between the inhibition of volatile oil on seed germination and shoots grow th and highercontent of terpene compound in volatile oil . The terpene compounds form�terpene cloud" through volatilization to affect theplant seed germination and the grow th of shoots . The mechanism of toxicity and inhibition of the terpene were : １ ) Binding upGA activity , inhibiting grow th of plant ; ２ ) Interfering the normal function of mitochondrion , hindering the metabolism to carryon ; ３) Affecting the function of the cell membrane , interfering the absorption of plant to mineral material ; ４ ) Destroying thecomplexation within the nourishment absorption process , making nutrient can摧t through the membrane system . Study theallelopathy of A . scop aria , not only has the theory meaning of the biology , but has an important value to use biologicaltechnique guiding agriculture practice .ReferenceYang Yuesheng , Futsuhara Yuzu . １９９１ . Inhibitory effects of volatile compounds released from rice callus on soybean callusgrow th : allelopathic evidencc observed using in vitro cultures . Plants Sci .７７ :１０３‐１１０ .

Allelopathic Effect of Volatile Oil of \u3ci\u3eArtemisia scoparia\u3c/i\u3e

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Allelopathic Effect of Volatile Oil of \u3ci\u3eArtemisia scoparia\u3c/i\u3e

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