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Human Plant Use

by: Steven Hernandez

Human Plant Use PBIO1030

Steven Hernandez
Plants and People
Dr. Thompson

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About this Document

Notes from the week of Sept. 21st, concerning the ways that mankind use plants and how they are both domesticated and artificially modified
Plants and People
Dr. Thompson
Class Notes
25 ?




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This 8 page Class Notes was uploaded by Steven Hernandez on Sunday September 27, 2015. The Class Notes belongs to PBIO1030 at Ohio University taught by Dr. Thompson in Summer 2015. Since its upload, it has received 41 views. For similar materials see Plants and People in Biomedical Sciences at Ohio University.

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Popular in Biomedical Sciences


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Date Created: 09/27/15
Monday September 21 2015 PBIO Plant Domestication Fertile Crescent Thought to be the birthplace of plant domestication Section between the Tigris and Euphrates rivers Baney One of the early domesticated grains Popular ingredient in making beer Evidence for Agriculture and Domestication Questions scientists ask were people farming what types of foods were being eaten what kinds of methods were used to cultivate and grow food What kinds of evidence have been used to understand ancient agricultural societies Fossil remains of items such as pollen and seeds Depiction of tools in works of art such as Greek pottery Examples of ancient landscaping such as terrace farming in Peru Ancient tools that have survived overtime such as an ancient grinding stone and bowl What about domestication Seeds burned on fireplaces Monday September 21 2015 Plants like corn would not survive in the wild and can only live on if cultivated by humans Examples of Early Agriculture Mexico 5500 year old maize discovered in caves Corn could have been domesticated even earlier than that time through generic evidence Difference between Domesticated and Wild Plants Wild can be smaller can survive on their own difference in taste Domesticated humans at least implement several different tactics in agriculture used to harvest crop Shattering when a seed breaks apart in order to spread for reproduction No shattering domestication Corn is an extremely domesticated plant Does not shatter No dormancy o In the wild that com would die off quickly Exemplary of human interaction with plants Monday September 21 2015 Natural vs Artificial Selection Natural selection natural process that allows plants to grow and develop Artificial selection adapting plants for someone else s benefit especially humans Wednesday September 23 2015 PBIO Agrochemicals Cover Crops Used to prevent other commonlyused agriculture methods tilling pesticides etc Regular crops for farming absorb nutrients that these cover crops provide Only 1 of American farms use this method Usually from the legume family Also include peas beans locust trees Nitrogen fixing through symbiosis Reduces fertilizer use Phosphorous Cycle Cycle created from constant farming Can create algal blooms which are damaging to plants and other aspects of the environment The Phosphorous Cycle Q m lt4 Geological pun m new rod to 9 m Wednesday September 23 2015 Friday September 25 2015 PBIO Bioengineering DNA Genetic code is the same for all organisms W O lumcripiinn Q I I I I o i u u RNA 539 v lramlzmun lu In r In In 1 r In or In VI In In J M II Protein O O H O O H O O O O DNA goes to RNA and later to proteins which make polypeptides Gene Expression Process by which DNA directs synthesis of proteins Genontype makes up phenotype Stages Transcription and translation Genetic Engineering Restriction enzymes found in bacteria are useful to cut out genes of interest Originally used to fight against bacteriophages Scientists can insert genetic sequences and have bacteria incorporate it into its own code bacteria multiply and spread the gene Friday September 25 2015 First genetically engineered thing sold to people Tomato Flavr Savr tomato in 1994 Supposed to ripe on vine lasts longer Eventually unsuccessful and pulled from the market Bt Corn Has Bacillus thuringiensis genes in it that help protect it from caterpillar pests Superweeds and Resistant Pests The Super Problem Geneticallymodified weeds that are resistant to geneticallymodified plant resistances Friday September 25 2015 You can spray your whole farm with herbicides and still have weeds Natural selection will eventually favor pests that are resistant to the pesticides that are constantly being overused Some wheat can become weedy and resistant to herbicides


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