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A Study Of Directional Cultivation On Objective Active Substance Of Artificial Compound Community Of Camptotheca Acuminate And Taxus Chinensis Var. Marei

Posted on:2009-05-11Degree:DoctorType:Dissertation
Country:ChinaCandidate:L H LiFull Text:PDF
GTID:1103360275466165Subject:Botany
Abstract/Summary:PDF Full Text Request
Camptotheca acuminate and Taxus chinensis var.marei which are the grade one and two national protected plant are famous species for anti-cancer,which contain anti-cancer active components,camptothecin and taxol,however,it is low content of their bodies.As the wild populations prohibited harvested,we have to cultivate the species to meet the huge market demands.According to the biological characteristics which they both belong to mountain plants and Camptotheca acuminate and Taxus chinensis var.marei are positive and negative respectively,artificial compound community is constructed scientifically,in which enhance land use,reduce occupation of agricultural land to achieve resource increment in Zhejiang area which has less farmland than mountains.Due to camptothecin and taxol are secondary metabolites belonging to Camptotheca acuminate and Taxus chinensis var.marei respectively,they make up use and have been controlled by the conditions of the ecological environment.By analyzing the characteristics of secondary metabolites and environment of Camptotheca acuminate and Taxus chinensis var. marei,we find that dry environment and light could improve the content of camptothecin and taxol.That meets the C-type theory in plant life theory.This paper guided by the C-type theory in plant life theory,configures Camptotheca acuminate and Taxus chinensis var.marei together,and selects key ecological factors to conduct directive training for artificial compound community of Camptotheca acuminate and Taxus chinensis var.marei.According to biological characteristics of secondary metabolites of Camptotheca acuminate and Taxus chinensis var.marei,variation of content of camptothecin and taxol belonging to Camptotheca acuminate and Taxus chinensis var.marei respectively and the relationship of their ecological conditions are monitored.The result shows that,in the full illumination conditions,camptothecin will be increased by dry conditions,and on the same conditions,the stronger the light intensity is,the higher the content of camptothecin increase. On the basis of the result,we take Camptotheca acuminate to build community,and take Taxus chinensis var.marei as companion species to build Camptotheca acuminate artificial compound community.We construct two ecological conditions of the plains and slopes and contrast artificial single species community cultivated plant.After construction,testing and analyzing the content of objective active substance,the result shows:At flat and sloping field artificial compound community,the average content of camptothecin are 0.6%0 and 0.88%0,and the average content of taxol are 0.15‰and 0.18‰. The content of objective active substance at sloping field is higher than at flat.That is because the terrain of flat artificial compound community slopes gently,less runoff,0.43 canopy density,and less resistance of light and soil.However,at sloping field,on the base of sloping field,it has good drainage,canopy density is 0.37,and there is more resistance by light and soil than at flat.By controlling and changing stand environment condition,the content of camptothecin and taxol follows the same law.According to plant life cycle forms theory,flat and sloping Camptotheca acuminate artificial compound communities belong to V style and V to VC style plant life cycle forms respectively,Taxus chinensis var.marei belongs to V and V style plant life cycle forms. Camptotheca acuminate and Taxus chinensis var.marei at fiat and sloping field belong to V style,VC style,VC style,VC style after treatment.It shows that the resistance gets more by light and dry conditions.The proportion of clone growth was increased after treatment.It improves the secondary metabolites.This paper uses plant life cycle forms theory,and selects the ecological factors of moisture and light,and cultivate plant at flat and sloping field with treatment.That is an innovative research.That helps farmers to change the plant construction and improve the theory of building new country.
Keywords/Search Tags:Camptotheca acuminate, Taxus chinensis var. marei, artificial compound community, objective active substances, directional cultivation
PDF Full Text Request
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