Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which...
Transcript of Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which...
LeafstructureofmonocotscanleadtoIden1fica1on
LeavesasFoodGreensandHerbsParsley
Chives
SwissChard Endive
Spinach
Rhubarb LeafLeBuce
PlantStructure/Anatomy
Buds
BudStructureAbudisanundevelopedshootfromwhichleavesorflowerpartsgrow.
Aleafbudiscomposedofashortstemwithembryonicleaves.LeafbudsoIenarelessplumpandmorepointedthanflowerbuds.
Aflowerbudiscomposedofashortstemwithembryonicflowerparts.
FlowerBuds
LeafBud
BudLoca1onTerminalorApicalbudsarelocatedattheapex(1p)ofastem.Lateraloraxillarybudsarelocatedonthesidesofastemandusuallyarisewherealeafmeetsastem(anaxil).Adven::ousbudsariseatsitesotherthantheterminaloraxillaryposi1on.Theymaydevelopfromroots,asteminternode,theedgeofaleafblade,orcallus1ssueatthecutendofastemorroot.Adven11ousbudsallowstem,leaf,androotcuOngstodevelopintoen1relynewplants.
Len:cels–raisedporesallowinggasexchange.
BudsasFood
PlantStructure/Anatomy
Flowers
FlowersFlowershavesexualreproduc1onastheirsolefunc1on.FragranceandcoloraBractpollinators(insectsorbirds)thatplayanimportantroleinthereproduc1veprocess.
FlowerStructure
Male FemaleorPis:l
(pollensac)
(eggs)Ifaneggisfer1lized,
theovuledevelopsintoaseed.
(protectsflowerbud)
(pollinatora@rac:on)
AllSepals=CalyxAllPetals=Corolla
TypesofFlowersAcompleteflowerhasastamen,pis1l,petalsandsepals.Anincompleteflowerhasoneofthepartsmissing.
Perfectflowercontainsbothfunc1onalstamensandpis1ls.Imperfectflowerlackseitherstamensandpis1ls.Pis:llate(female)flowershavefunc1onalpis1lsbutlackstamens.Staminate(male)flowerscontainstamens,butnopis1ls.
CompleteFlower Imperfect(pis1llate)Flower
PerfectbutIncomplete
PlantswithImperfectFlowersAperfectflowerhasbothsexeswhileanimperfectflowerlacksoneortheother.Ifaspecieshasimperfectflowers,butbothmaleandfemaleflowersareonthesameplant,thatspeciesissaidtobemonoecious.Ifthemaleandfemaleflowersareonseparate,maleandfemaleplants,thatspeciesissaidtobedioecious.
GinkgoMalePlant GinkgoFemalePlant
MonoeciousCornDioeciousGinkgo
Self-fruiVulplantsvs.Self-sterileplantsSelf-fruiFulplantscanbepollinatedwithpollenfromthesameflowerorpollenfromotherflowersonthesameplant.Thisistrueofmostplantspecies,butdoesnotprecludecross-pollina1on.
Self-sterileplantscannotbepollinatedwithpollenfromthesameflowerorpollenfromotherflowersonthesameplant.Theyrequirecross-pollina1onfromadifferentvariety.Thisistrueforsomeapple,plumandpearspecies.
“Whydoesn’tmy[apple/plum/pear]treeproducefruit?”
PlantStructure/Anatomy
Fruits
FruitStructureFruitconsistsoffer1lized,matureovules(seeds)plustheovarywall,whichmaybefleshy,asinanapple,ordryandhard,asinanacorn.
Theonlypartofthefruitthatcontaingenesfromboththemaleandfemaleflowersistheseed.Therestofthefruitarisesfromthematernalplantandisgene1callyiden1caltoit.
Insomefruits,theseedsareenclosedwithintheovary(e.g.apples).Inothers,seedsaresituatedontheoutsideoffruit1ssue(e.g.strawberries).
TypesofFruitFruitsareclassifiedassimple,aggregate,ormul:ple.
Simplefruitsdevelopfromasingleovary.Theyincludefleshyfruitssuchascherriesandpeaches(drupe),pearsandapples(pome),andtomatoes(berries).Althoughgenerallyreferredtoasavegetable,tomatoestechnicallyareafruitbecausetheydevelopfromaflower.Squash,cucumbers,andeggplantsalsodevelopfromasingleovaryandareclassifiedbotanicallyasfruits.
Othertypesofsimplefruitaredryfruits.Theirwalliseitherpaperyorleatheryandhard,asopposedtothefleshyexamplesjustmen1oned.Examplesarepeanuts(legume),poppies(capsule),maples(samara),andwalnuts(nut).
SimpleFruitTypesofFruit
Aggregatefruitsdevelopsfromasingleflowerswithmanyovaries.Examplesarestrawberries,raspberries,andblackberries.Theflowerisasimpleflowerwithonecorolla,onecalyx,andonestem,butithasmanypis1lsorovaries.Eachovaryisfer1lizedseparately.Ifsomeovulesarenotpollinatedsuccessfully,thefruitwillbemisshapen.
TypesofFruitAggregateFruit
Mul:plefruitsarederivedfroma1ghtclusterofseparate,independentflowersborneonasinglestructure.Eachflowerhasitsowncalyxandcorolla.Pineapplesandfigsareexamples.
TypesofFruitMul1pleFruit
FleshyFruits
DryFruits
OPENPOLLINATED&HEIRLOOMS:Theseplantsaregenerallythesamefromgenera1ontogenera1on.Yousavetheseedandyou’llgetthesameplant.But,some1mesthereisgene1cdriI(theseedproducesadifferentkindofoffspring).ThestrangeplantcanberemovedtosavetheintegrityofthevarietyORsavedifithasadesirabletraityouarelookingfor.
AA AAAA AA AAAA AA AA
aa aaaa aa aaaa aa aa
TrueBreedingParents
HYBRIDS:Ahybridplantistheresultofaspecificcrossoftwoparentplantsbycontrolledpollina1on–usuallybyhand.Thisprocesshasbeendoneforcenturiesbygardeners.Theextravitalitygainedinhybridplantsiscalledhybridvigor.Theseedsfromhybridplantswillnotproduceseedswhichwillgrowintothesamevariety.
AA AAaa Aa Aaaa Aa Aa
Aa AaAa AA AaAa Aa aa
HybridorF1(HybridVigor)
Aandaarealleles(Adominant;arecessive)
GENETICALLYMODIFIEDORGANISM0RGMO’s:Theseplantsaredevelopedbytakingagenefromoneplantandinser1ngthisgeneintoanotherplanttogetadesirabletrait.GMOseedsarenotavailableforhomegardens.
PlantProcesses/Physiology
Photosynthesis
Respira1on
Transpira1on
Transpira1on
Respira1on
6CO2+6H2O-energy
+6O2
glucose
variousstorageforms
Photosynthesis
6CO2+6H2O+light
+6O2
glucose
variousstorageforms
Chloroplast
(+energy)
fluidinbetweengrana,wherecarbohydrateforma1onoccurs
stromaorstromatav.stomaorstomata
Thematrixofthechloroplastwhichisathickfluidinbetweengranawherevariousenzymes,moleculesandionsarefound,andwherethedarkreac1on(orcarbohydrateforma1onreac1ons)ofphotosynthesisoccurs.
A1nyporeinaplantleafsurroundedbyapairofguardcellsthatregulateitsopeningandclosure,andservesasthesiteforgasexchange.
fluidinbetweengrana,wherecarbohydrateforma1onoccurs
Chlorophylla&b
Light-dependentReac1ons
StromaReac1ons
H2O O2
Light
ATP NADPH
glucose
NADP+ADP
CO2
ATP=StoredEnergy NADPH=StoredReducingPower
LightDependentReac1ons
StromaReac1ons
Environment HardinessZones
h@p://planthardiness.ars.usda.gov/PHZMWeb/
h@p://planthardiness.ars.usda.gov/PHZMWeb/
Greetings from Canfield, Ohio
Averagenumberofdayswithoutkillingfrost.
DatesinspringaIerwhichthechanceoftemperaturesfallingto32Forlowerislessthan50%.
Datesinfallbywhichthechanceofthefirst32Ftemperaturewillhaveoccurredis50%.
Long-termaveragerainfall(inches)forgrowingseason,AprilthroughSeptember.
BinomialNomenclature
CarolusLinnaeus(1707–1778)
Thescien:ficname(speciesname)ofanyplant,animal,fungus,algaorbacteriumconsistsoftwoLa1nizedwords.Thefirstwordisthenameofthegenustowhichtheorganismbelongs.Thesecondwordisthespecificepithetorspecifictermofthespecies.Together,thegenusplusthespecificepithetmakeupthespeciesname.
BinomialNomenclature
Some1mesthenameorabbrevia1onofthebiologist(calledtheauthority)whonamedtheorganismfollowsthespeciesname.UlmusamericanaL.tellsusthatCarolusLinnaeus(L.)namedtheAmericanelm.
Example: RedMaple=Acerrubrum
Theredmapleisinthe"maple"genus,whichiscalledAcer,anditsspecificepithetisrubrum,whichisLa1nforred.Therefore,thebinomialnameforthisspeciesisAcerrubrum.
Kingdom Planta--plants(~326,000species)
Subkingdom Tracheobionta--vascularplants(~287,000)
Division Magnoliophyta--angiosperms,floweringplants(~259,000)
Class Magnoliopsida--dicotyledons(~199,000)
Subclass Rosidae--flowerswithseparatepetals(~58,000)
Order Sapindales--woody,lobedorcompoundleaves(~5,700)
Family Aceraceae--oppositeleaves,wingedsamara;mostlymaples(~152)
Genus AcerL.--maples(~150)
Species AcerrubrumL.--redmaple(1)
DicentraspectabilisArisaematriphyllum
Calthapalustris
BleedingHeartsJackinthePulpit
MarshMarigolds
Ques/ons?