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1、第40卷第4期茶叶通讯Vol.40,No.42013年12月TEACOMMUNICATION茶叶通讯December,2013第40卷茶刺蛾危害诱导茶树挥发物释放变化的研究12111黄安平李正文肖蕾王沅江周凌云(1湖南省农业科学院茶叶研究所·长沙·410125;2湖南省长沙市明德中学·长沙·410009)摘要:茶园观察发现,茶刺蛾危害的茶园的棒须刺蛾寄蝇数量明显多于未危害的茶园。推测茶树被茶刺蛾危害后释放了特定的信号物质,这些物质在棒须刺蛾寄蝇寄主定位中起着关键的作用。为了证实这一猜想,我们研究了茶刺蛾危害对茶树
2、挥发性有机物释放的影响。未受茶刺蛾危害的枝叶有挥发性有机物74种组分。与未受茶刺蛾危害枝叶的挥发物组分相比较,受害后酯类、醛类和烃类的种类数量和所占相对含量都有显著变化。醇、杂环化合物、醚和有机酸类化合物在种类数量和相对含量上变化不大。受害后,4-异丙基甲苯、蒎烯、1-乙基-2,4-二甲基苯、4-乙基甲苯、3-乙基-甲苯、6-甲基庚烯[5]酮[2]和1,2,4-三甲基苯的相对含量显著增加。新产生54种化合物,其中烯烃14种,芳香烃12种,酯8种,烷烃8种,酮5种,醇3种,醛2种,有机酸和杂环类各1种。值得注意的是
3、受害后萜类化合物的种类数量和相对含量均有显著的变化,暗示这些化合物可能在棒须刺蛾寄蝇的寄主寻找过程中发挥作用。研究结果为筛选引诱天敌昆虫的化学信息素,并应用其防控茶刺蛾的研究奠定一定的基础。关键词:茶树;茶刺蛾;棒须刺蛾寄蝇;挥发性有机化合物;虫害诱导植物StudyonChangeinTeaPlantVolatileDamagedbyIragoidesfasciataMoore(Lepidoptera:Eucleidae)12111HUANGAn-ping,LIZheng-wen,XIAOLei,WANGYuan
4、-jiang,ZHOULing-yun(1.HunanTeaResearchInstitute,HunanAcademyofAgriculturalSciences,Changsha410125,China2.ChangShaMingDeMiddleSchool,Changsha410009,China)Abstract:Observedintheteagarden,wefoundthatthenumberofChaetexoristapalpisChaointheteaplantationswhereteapl
5、antsweredamagedbyteaslugmothwassignificantlymorethanthoseundamaged.Wespeculatethatteaplantwouldreleasespecificsignalsubstanceswhichplayakeyroleinhostlocation(especiallylongdistance)byC.palpis.Inordertoconfirmthisconjecture,theeffectofthedamagingofteaslugmotho
6、nthevolatileorganiccompounds(VOCs)ofteaplantwasstudied.Theresultsindicatedthatatotalofseventy-fourcomponentswereidentifiedintheundamagedtwigsandleaves.Comparedwiththeundamagedtwigsandleaves,thenumberandrelativecontentofethers,aldehydes,andhydrocarbonschangede
7、vidently,whilethoseofalcohols,heterocycliccompounds,ethersandorganicacidcompoundshadlittlechange.Afterdamage,therelativecontentof4-cymene,pinene,1-ethyl-2,4-dimethylphenoxy,4-ethyltoluene,toluene-ethyl-6-methyl-heptene[5]ketone[2]and1,2,4-trimethylbenzeneincr
8、easedsignificantly.fifty-fournewcompoundswerefoundedinthedamagedones,includingoffourteenalkenes,twelvearomatichydrocarbons,eightesters,eightalkanes,fiveketones,threealcohols,twoaldehydes,