[Objective] The aim was to compare the molluscicide activity of ethanol extract of Sapium sebiferum,Pterocarya stenoptera and Cryptomeria fortunei.[Method] The molluscicide activity of ethanol extract of S.sebiferum,P...[Objective] The aim was to compare the molluscicide activity of ethanol extract of Sapium sebiferum,Pterocarya stenoptera and Cryptomeria fortunei.[Method] The molluscicide activity of ethanol extract of S.sebiferum,P.stenoptera and C.fortunei was determined through poison test of Oncomelania hupensis in laboratory.[Result] S.sebiferum,P.stenoptera and C.fortunei had certain molluscicide effect,and S.sebiferum and C.fortunei had better effect with little difference than P.stenoptera;ethanol could extract the effective molluscicide component from plant more completely,and its molluscicide effect was better than that of plant infusion.[Conclusion] Our study could provide theory reference for the plant selection of controlling O.hupensis ecologically.展开更多
The effects of oxytetracycline on the morphology of the seedling with witches’ broom and global DNA methylation level of Paulownia tomentosa × Paulownia fortunei were investigated.The results indicated that the ...The effects of oxytetracycline on the morphology of the seedling with witches’ broom and global DNA methylation level of Paulownia tomentosa × Paulownia fortunei were investigated.The results indicated that the infected seedlings by phytoplasma recovered to normal morphology of the healthy seedlings after being treated with more than 20 mg L-1 oxytetracycline,and the pathogen could not be detected with PCR in the seedlings.The global DNA methylation level of diseased seedlings was lower than that of healthy one.The oxytetracycline treatment was able to increase the DNA methylation level,and the methylation level of the diseased seedlings increased with the dose of applied oxytetracycline.However the increased methylation of infected seedlings with oxytetracycline treatment could still not reach to level of healthy seedling(CK),even the seedlings treated with lethal oxytetracycline concentration.展开更多
基金Supported by National Key Technology R&D Program(2006BAD03A1505)National Forestry Bureau Construction Project([2007]Number527)~~
文摘[Objective] The aim was to compare the molluscicide activity of ethanol extract of Sapium sebiferum,Pterocarya stenoptera and Cryptomeria fortunei.[Method] The molluscicide activity of ethanol extract of S.sebiferum,P.stenoptera and C.fortunei was determined through poison test of Oncomelania hupensis in laboratory.[Result] S.sebiferum,P.stenoptera and C.fortunei had certain molluscicide effect,and S.sebiferum and C.fortunei had better effect with little difference than P.stenoptera;ethanol could extract the effective molluscicide component from plant more completely,and its molluscicide effect was better than that of plant infusion.[Conclusion] Our study could provide theory reference for the plant selection of controlling O.hupensis ecologically.
文摘The effects of oxytetracycline on the morphology of the seedling with witches’ broom and global DNA methylation level of Paulownia tomentosa × Paulownia fortunei were investigated.The results indicated that the infected seedlings by phytoplasma recovered to normal morphology of the healthy seedlings after being treated with more than 20 mg L-1 oxytetracycline,and the pathogen could not be detected with PCR in the seedlings.The global DNA methylation level of diseased seedlings was lower than that of healthy one.The oxytetracycline treatment was able to increase the DNA methylation level,and the methylation level of the diseased seedlings increased with the dose of applied oxytetracycline.However the increased methylation of infected seedlings with oxytetracycline treatment could still not reach to level of healthy seedling(CK),even the seedlings treated with lethal oxytetracycline concentration.