Week 1 Full

//ss 2/,so BICD120:Dr.Schmidt TA. ZaraTabi(ztab:jQ,Jqsd€gu) Week 1 AIM:ztabi06 Plants:an Introduction of morespecies?(2 ans.) of Ozaid in the radiation - Howdidthe accumulation - Whatarethe prosandconsof plantlifemovingon land? The Plant Gell: 3 Maior Differences n Will\ cql'b1na7yg*', -lrru tA^tuI4-,ViUS support! cell walls:Givesa plantstructural - (- ,/. *^*!*a x4. main compohents:*n^-a 1) t' CellWall-Poroug,Ctructure

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orl'zat* 3)Midd,;,:K,ffiWii%#ffifu{;' - Composedmostlyof Pectins:Act LikeGlue Aid in transportbetweenneighboring 4) Plasmodesmatacells

Plastids:Characterized by theirCompounds all plastidssharewhat4 characteristics? - Thoughdifferentin functionandcomponents, . Ribosomes . DoubleMembrane . Divideby Fission . Small.CircularDNA Tvpe

Chloroplast

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Function? Photosynthesis AminoAcid & FattyAcid Synth. TemporaryStarchStorage

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Chromoplast

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Yellow/Orange Coloration

RipeFruits

Amyloplast

Amylose

Starch/Energy Storage

Roots,Tubers

Elaioplast

Oils

Storage Oil/Energy

Seeds

Proplastid

to all plastids Precursor

Etioptast

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. Becausethe Chloroplast you shouldbe ableto point of all plastids, is the mostrecognized out specificpartsof its structure. - Be awarethata onetypeof plastidmayhavethe abilityto turnintoanother! enclosedby the Tonoplast) Manyfunctionsto be familiarwith! Vacuole:Largecompartment 1) Storageof SecondaryPlantProducts 2) Storageof LectinProteinsin seeds - Acts as Nitrogenreserve 3) AnthocyaninpigmentAccumulation {ruc{a plat cA}}.ts yrercl$& - GivesBlueA/ioletcoloration 4) Breakdownand Recyclingof Macrgnlslssulss--+/ayrloqeK tu ,44e &. 4 fu7,nruzze 5) Maintainturgorpressure*'/ /al tn iu a,a/a/6) MaximizeSurfaceto volumeratioin cell) Maximizelightcapture cd ( pH levels,[] of POa,NO3,etc.) 7) Maintainhomeostasis - Can becomeveryacidicas it takesin H+ lons Plant Metabolites Knowthe Difference: - PrimaryMetabolites: Foundin ALL plants,necessaryfor growthand development Restrictedto certaincelltypesor plantspecies. - SecondaryMetabolites: . Althoughnot essentialfor the grov'rth of a plant,servesimportantecglogic.glfunctions. ^t,-^ , .) vtannVotg

Attractants ex. Defenseagainstherbivores,

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{ HistoricalPerspective Scienfibf

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Jan BabtistaVan Helmont

Aristotleby showingplantsdo notgainmassby absorbing Disproving soil

JosephPreistly

Showingthatplants"restored" the air thatwas "exhausted" by a burningcandle

Jan Ingenhousz

Followingup on Preistly's experiments ) sunlightand leaff material was necessaryto restoreburntair

NicolasSaussure

- MassGainedby plantgreaterthanamountof carbontakenup - Equalamountsof COzandOzare exchanged

Van Niel

OzReleasedduringphotosynthesis derivedfrom HzO,not COz

4t*in{"fr Be sureto understand the experiments thatledto theirconclusions!