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BIOL 341 (32)
Kenton Ko (32)
Lecture

Wk7L1Ch13.pdf

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Department
Biology
Course
BIOL 341
Professor
Kenton Ko
Semester
Winter

Description
Plantmetabolitesandplantdefense Secondarymetabolitescompoundsthatplantsmakethatarentdirectlyinvolvedingrowthandmetabolismo Mostlydefensecompounds100sofdifferentformsaremadebyanindividualplantSpeciesspecificdifferentspeciesmakedifferentclassescategoriesofsecondarymetabolitesSecondarymetabolites Nodirectfunctioningrowthanddevelopment Oncethoughtobewasteproductsofmetabolicpathways Ofinteresttohumansforo Medicinaldrugso Poisonso Flavorso Industrialmaterials Ofimportancetoplantsforo Herbivoremicrobialdefenseo AttractantspollinatorsseedHdispersinganimalso PlantHplantcompetitiono PlantHmicrobesymbioses Agricultureoftenbredoutwhichresultsinbettertastingfoodbutweakeneddefenses Threemajorgroupsof2ndarymetabolitesnitrogenHcontainingsecondaryproductsphenoliccompoundsandterpenesDifferentclassesareallderivedfromprimarymetabolismPEPpyruvate3HPGAErythrose4HphosphateSmall234carboncompoundscanbesentthroughalternativepathwaystogeneratenumerouscompoundsTerpenebasistheisopreneunit5CfromthisyoucangetenormouscomplexityintheterpeneclassTerpenesingrowthanddevelopment Canbeconsideredprimaryratherthansecondarymetabolites Gibberellinshromonesditerpenes Brassinosteroidshormonestriterpenes Abscisicacidhormonesesquiterpene Sterolscellmembranescomponentstriterpenes CarotenoidsaccessorypigmentsforPSSprotectiontetraterpenes Noteterpenesaresynthesizedfromacetyl5coAoritsglycolyticintermediatesTerpenesindefensemajoritysecondarymetabolite Chrysanthemumsmonoterpeneesterspyrethoidso Naturalinsecticideo Commerciallowpersistenceinenvironment0toxicitytomammals ConiferspinefirmonoterpenesinresinConifersproducemonoterpenesinresinductsductsintheresincomingfromtheductsareo Insecticideegbarkbeetlemonoterpenesthatarebothstickyanddifficult EssentialoilsfortheinsecttopenetratetheyareimpalatableWoundingresponseinconiferso MixtureofvolatilemonosesquiterpenesMentholstimulateso Characteristicodorcoldreceptorso EgpepptermintmethollemonlimonenebasilsageConsideredo Plantinsecticidesusseasoningperfumeectinsecticidalo EssentialoilsareoftenfoundinglandularcompoundshairsthatprojectoutwardfromthedeterrentforinsectsbutpleasantforusepidermisandservetoadvertisetheSomeplantspeciesegstingingnettlesgiveaskinreactiontoxicityoftheplanto Trichomescanjustbespikytodeterherbivores LimonoidsGlandularformscanbefullofthenastycompoundso Triterpenesherbivoredeterrento Bitternessincitruso EgazadirachtinneemtreeAfricaAsiadetersat50ppbcommercializedoPhytoecdysoneso Commonferno Steroidsresemblinginsectmoltinghormoneo Insecticidenematodeso Ingestionbyinsectsdisruptsmoltinganddevelopmentwhichoftenkillsthem Cardenolideso Egfoxgloveo Vertebrateherbiovoreso Medicinalslowsheartbeattreatsdiseaseso ExDigoxindeadlytoxin
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