Biology Notes Lectures 14, 15, and 16
Biology Notes Lectures 14, 15, and 16 Bio106
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This 5 page Class Notes was uploaded by Michael Hummel on Friday February 20, 2015. The Class Notes belongs to Bio106 at Washington State University taught by Dr Asaph Cousins in Fall. Since its upload, it has received 37 views. For similar materials see Biology 106 in Biology at Washington State University.
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Date Created: 02/20/15
Biology Notes Lectures 14 and 15 Photosynthesis consists of the light reactions photo partand CalvinBenson Cyle teh synthesis part 3 steps of Calvin Benson cycle carbon fixation Reduction Regeneration of C02 acceptor RuBP A This is a Cycle constantly renewing itself Alternative mechanisms of carbon fixations that further limit the availability of carbon dioxide in plants Dehydration is a problem for plants On hot dry days plants close stomata which conserves H20 but also limits photosynthesis This increases the potential of oxygen uptake and lowers carbon dioxide intake These conditions favor Photorespiration C3 plants 3 carbon compound plants initial fixation of C02 via Rubisco forms three carbon compundsquot Rubisco also reacts with 02 instead of C02 photorespiration Photorespiration Consumes 02 and energy reeases without producing ATP or sugar AlternativeMechanisms for C02 fixation Minimize photorespiration by concentrating CO 2 C4 plants Ex Corn Sugar Cane Use compartmentalization to pump C02 Crassulacean acid metabolism CAM Look up examples of cam plants Open their stomata at night incorporating C02 into organic acids Stomata close during the day and C02 is released from organic acids and used in the Calvin cycle PLANT NUTRITION SoiA living finite resource limited resource minerals water with solutes Gases Living organisms Organic matter living or dying Ex Sand silt clay Top Soil Combo of organic and inorganic material Mineral particles living organisms and humus the decaying organic material Loams equal parts sand silt and clay Anions negatively charged ions in soil nitrate phosphate and sulfate Not bound tightly to negatively charged and release easy But also leach out into ground water Cations Magnesium Potassium and calcium Bound tightly to negatively charged soil Clicker question Most of the water taken up by a plant is used as a solvent Used as a hydrogen source in photosynthesis lost during transpiration Converted to COZ Used to keep cells turgid W999 Transpiration is the movement of water from the rot system absorbed by th soill around the rot system moved with the xylem cells vascualr system root to stems then our though the leaves Fertililizers Enriched in nitrogen phosphorous and potassium Nitrogen synthesized with large fossil fuel energy input table 37 1 Essential Elements in Plants Pmm Avd lo quot Mass In Element lo Hans Dry liswe Mayo lumums an awlnmls L 39 If a lL ll l yquot39 391 ill i y a l l l l H r 1 339 r v39 tr v Igl l i i c in Al ll l v f lt l u x l 39 391 39 39 f ll u l39 v01 In D r J l p w t39 i A I l u i quot A s 39 ll ll 0 r a y r 11 r r r Mm j 39 I c i r 39 39 xi 39 f a39 nun j z spin ii 5 1 119 39 c i 15quot 39 139 1154 39 in 1 P A I P l 39 39 V 395 339 3 39P39 quot j3939 Mzctonutncms 939 2quot quotf 39Al39r 39j quot1 quot ilquot 39i 3939 Ll Tu 57quotquot rv 2 I 39 I J r I r r kfaly ll 339 Iquot 3939 I z 39 T 39l 0quot 39fl 1 l Iquotquotlquotquot l a l l 39 hrquot 1 g gt r t39im I 39 I v r l 392 I a 392 ll l3939 pl p quotI r v l quot I f 1 l 39 oi 39 lf 1 5 39 quotI n r J l ll P l x 1 l39 quot739 3993quot l quot r l K li 39 Y a l 39u I I i p L 0 J 23 x l v 4 a Symptoms of mineral deficiency Deficiency of a mobile nutrient Usuay affects older organs more than younger onesthe nutrients is getting pulled out of the older tissue and utilized by the younger tissue Deficiency of less mobile nutrient Usuay affects younger organs more than older ones cause older ones have already acquired the minimal nutrients and it is not transferable Common Deficiencies are nitrogen potassium and phosphorus First one healthy secondPhosphate de cient third Potassium de cient fourth Nitrogen de cient Plant Nutrition often involves relationships with other organisms Symbiotic nitrogen xationn Rhizobacteria Mycorrhizae The role of baccteria in symbiotic Nitrogen Fixation 0 Provide some plant species with a built in source of xed nitrogen From and agricultural standpoint symbiotic plants and nitrogen xing bacteria occur in the legume family peas beans and other similar plants Have nutritional adaptions that use other organisms in nonmutualistic ways 0 Epiphytes EX staghorn fern Parasites EX Mistletoe dodder indian pipe 0 carnivorous plants EX venus y trap CLICKER QUESTION Most of the organic material of a lang come from AWater B Carbon Dioxide C Soil Minerals D Atmospheric oxygen E Nitrogen Think pair share Describe the relationship between rhizobacteria and their host plant the host plant will receive more nitrogen thanks to the bacteria the rhizobacteria receives sugars and nutrients from the plant Signal transduction pathways link signal reception to response After receiving stimulation a receptor initiates a series of biochemical steps Couples the reception of stimulas to a response Reception transduction and response Transcriptional regulation Transcription factors control transcription expression of genes Post translational modification involves activation of existing protein in the signal response Plant hormones help coordinate growth development and responses to stimuli Hormones are chemical signals that coordinate different parts of an organism tropisms are often caused by hormones Gibberellins Stem elongation Fruit Growth Germination The single transduction pathway occurs in which order Reception transduction response
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