Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which...

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Leaf structure of monocots can lead to Iden1fica1on

Transcript of Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which...

Page 1: Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which leaves or flower parts grow. A leaf bud is composed of a short stem with embryonic

LeafstructureofmonocotscanleadtoIden1fica1on

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Page 3: Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which leaves or flower parts grow. A leaf bud is composed of a short stem with embryonic
Page 4: Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which leaves or flower parts grow. A leaf bud is composed of a short stem with embryonic
Page 5: Leaf structure of monocots can lead to Iden1fica1on · A bud is an undeveloped shoot from which leaves or flower parts grow. A leaf bud is composed of a short stem with embryonic
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LeavesasFoodGreensandHerbsParsley

Chives

SwissChard Endive

Spinach

Rhubarb LeafLeBuce

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PlantStructure/Anatomy

Buds

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BudStructureAbudisanundevelopedshootfromwhichleavesorflowerpartsgrow.

Aleafbudiscomposedofashortstemwithembryonicleaves.LeafbudsoIenarelessplumpandmorepointedthanflowerbuds.

Aflowerbudiscomposedofashortstemwithembryonicflowerparts.

FlowerBuds

LeafBud

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BudLoca1onTerminalorApicalbudsarelocatedattheapex(1p)ofastem.Lateraloraxillarybudsarelocatedonthesidesofastemandusuallyarisewherealeafmeetsastem(anaxil).Adven::ousbudsariseatsitesotherthantheterminaloraxillaryposi1on.Theymaydevelopfromroots,asteminternode,theedgeofaleafblade,orcallus1ssueatthecutendofastemorroot.Adven11ousbudsallowstem,leaf,androotcuOngstodevelopintoen1relynewplants.

Len:cels–raisedporesallowinggasexchange.

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BudsasFood

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PlantStructure/Anatomy

Flowers

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FlowersFlowershavesexualreproduc1onastheirsolefunc1on.FragranceandcoloraBractpollinators(insectsorbirds)thatplayanimportantroleinthereproduc1veprocess.

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FlowerStructure

Male FemaleorPis:l

(pollensac)

(eggs)Ifaneggisfer1lized,

theovuledevelopsintoaseed.

(protectsflowerbud)

(pollinatora@rac:on)

AllSepals=CalyxAllPetals=Corolla

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TypesofFlowersAcompleteflowerhasastamen,pis1l,petalsandsepals.Anincompleteflowerhasoneofthepartsmissing.

Perfectflowercontainsbothfunc1onalstamensandpis1ls.Imperfectflowerlackseitherstamensandpis1ls.Pis:llate(female)flowershavefunc1onalpis1lsbutlackstamens.Staminate(male)flowerscontainstamens,butnopis1ls.

CompleteFlower Imperfect(pis1llate)Flower

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PerfectbutIncomplete

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PlantswithImperfectFlowersAperfectflowerhasbothsexeswhileanimperfectflowerlacksoneortheother.Ifaspecieshasimperfectflowers,butbothmaleandfemaleflowersareonthesameplant,thatspeciesissaidtobemonoecious.Ifthemaleandfemaleflowersareonseparate,maleandfemaleplants,thatspeciesissaidtobedioecious.

GinkgoMalePlant GinkgoFemalePlant

MonoeciousCornDioeciousGinkgo

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Self-fruiVulplantsvs.Self-sterileplantsSelf-fruiFulplantscanbepollinatedwithpollenfromthesameflowerorpollenfromotherflowersonthesameplant.Thisistrueofmostplantspecies,butdoesnotprecludecross-pollina1on.

Self-sterileplantscannotbepollinatedwithpollenfromthesameflowerorpollenfromotherflowersonthesameplant.Theyrequirecross-pollina1onfromadifferentvariety.Thisistrueforsomeapple,plumandpearspecies.

“Whydoesn’tmy[apple/plum/pear]treeproducefruit?”

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PlantStructure/Anatomy

Fruits

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FruitStructureFruitconsistsoffer1lized,matureovules(seeds)plustheovarywall,whichmaybefleshy,asinanapple,ordryandhard,asinanacorn.

Theonlypartofthefruitthatcontaingenesfromboththemaleandfemaleflowersistheseed.Therestofthefruitarisesfromthematernalplantandisgene1callyiden1caltoit.

Insomefruits,theseedsareenclosedwithintheovary(e.g.apples).Inothers,seedsaresituatedontheoutsideoffruit1ssue(e.g.strawberries).

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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).

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SimpleFruitTypesofFruit

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Aggregatefruitsdevelopsfromasingleflowerswithmanyovaries.Examplesarestrawberries,raspberries,andblackberries.Theflowerisasimpleflowerwithonecorolla,onecalyx,andonestem,butithasmanypis1lsorovaries.Eachovaryisfer1lizedseparately.Ifsomeovulesarenotpollinatedsuccessfully,thefruitwillbemisshapen.

TypesofFruitAggregateFruit

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Mul:plefruitsarederivedfroma1ghtclusterofseparate,independentflowersborneonasinglestructure.Eachflowerhasitsowncalyxandcorolla.Pineapplesandfigsareexamples.

TypesofFruitMul1pleFruit

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FleshyFruits

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DryFruits

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OPENPOLLINATED&HEIRLOOMS:Theseplantsaregenerallythesamefromgenera1ontogenera1on.Yousavetheseedandyou’llgetthesameplant.But,some1mesthereisgene1cdriI(theseedproducesadifferentkindofoffspring).ThestrangeplantcanberemovedtosavetheintegrityofthevarietyORsavedifithasadesirabletraityouarelookingfor.

AA AAAA AA AAAA AA AA

aa aaaa aa aaaa aa aa

TrueBreedingParents

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HYBRIDS:Ahybridplantistheresultofaspecificcrossoftwoparentplantsbycontrolledpollina1on–usuallybyhand.Thisprocesshasbeendoneforcenturiesbygardeners.Theextravitalitygainedinhybridplantsiscalledhybridvigor.Theseedsfromhybridplantswillnotproduceseedswhichwillgrowintothesamevariety.

AA AAaa Aa Aaaa Aa Aa

Aa AaAa AA AaAa Aa aa

HybridorF1(HybridVigor)

Aandaarealleles(Adominant;arecessive)

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GENETICALLYMODIFIEDORGANISM0RGMO’s:Theseplantsaredevelopedbytakingagenefromoneplantandinser1ngthisgeneintoanotherplanttogetadesirabletrait.GMOseedsarenotavailableforhomegardens.

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PlantProcesses/Physiology

Photosynthesis

Respira1on

Transpira1on

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Transpira1on

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Respira1on

6CO2+6H2O-energy

+6O2

glucose

variousstorageforms

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Photosynthesis

6CO2+6H2O+light

+6O2

glucose

variousstorageforms

Chloroplast

(+energy)

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fluidinbetweengrana,wherecarbohydrateforma1onoccurs

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stromaorstromatav.stomaorstomata

Thematrixofthechloroplastwhichisathickfluidinbetweengranawherevariousenzymes,moleculesandionsarefound,andwherethedarkreac1on(orcarbohydrateforma1onreac1ons)ofphotosynthesisoccurs.

A1nyporeinaplantleafsurroundedbyapairofguardcellsthatregulateitsopeningandclosure,andservesasthesiteforgasexchange.

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fluidinbetweengrana,wherecarbohydrateforma1onoccurs

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Chlorophylla&b

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Light-dependentReac1ons

StromaReac1ons

H2O O2

Light

ATP NADPH

glucose

NADP+ADP

CO2

ATP=StoredEnergy NADPH=StoredReducingPower

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LightDependentReac1ons

StromaReac1ons

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Environment HardinessZones

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h@p://planthardiness.ars.usda.gov/PHZMWeb/

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h@p://planthardiness.ars.usda.gov/PHZMWeb/

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Greetings from Canfield, Ohio

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Averagenumberofdayswithoutkillingfrost.

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DatesinspringaIerwhichthechanceoftemperaturesfallingto32Forlowerislessthan50%.

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Datesinfallbywhichthechanceofthefirst32Ftemperaturewillhaveoccurredis50%.

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Long-termaveragerainfall(inches)forgrowingseason,AprilthroughSeptember.

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BinomialNomenclature

CarolusLinnaeus(1707–1778)

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Thescien:ficname(speciesname)ofanyplant,animal,fungus,algaorbacteriumconsistsoftwoLa1nizedwords.Thefirstwordisthenameofthegenustowhichtheorganismbelongs.Thesecondwordisthespecificepithetorspecifictermofthespecies.Together,thegenusplusthespecificepithetmakeupthespeciesname.

BinomialNomenclature

Some1mesthenameorabbrevia1onofthebiologist(calledtheauthority)whonamedtheorganismfollowsthespeciesname.UlmusamericanaL.tellsusthatCarolusLinnaeus(L.)namedtheAmericanelm.

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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)

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DicentraspectabilisArisaematriphyllum

Calthapalustris

BleedingHeartsJackinthePulpit

MarshMarigolds

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Ques/ons?