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Chapter 36: Angiosperms and Water Transportation

by: fwmartin

Chapter 36: Angiosperms and Water Transportation BSC 120

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About this Document

Covers how angiosperms use complicated vascular structure to move water, nutrients, and sugars.
Honors Gen Biology II
Dr. Martha Powell
Class Notes
Biology, transpiration
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This 2 page Class Notes was uploaded by fwmartin on Tuesday February 23, 2016. The Class Notes belongs to BSC 120 at University of Alabama - Tuscaloosa taught by Dr. Martha Powell in Spring 2016. Since its upload, it has received 10 views. For similar materials see Honors Gen Biology II in Biological Sciences at University of Alabama - Tuscaloosa.


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Date Created: 02/23/16
Chapter 36: Angiosperms and Water Xylem: • cells are dead. • Act as a straw. • Water moves because of stomata in leaves o If stomata are open water moves up • NO ATP Used Xylem carries water and minerals using transpiration through a straw of dead cells Phloem: • Phloem carries sugars through living cells but uses ATP • Sugars from leaves are carried anywhere they are needed, but usually down towards roots Apical Meristem- how plants grow • On roots, stems, anywhere with growth Vascular tissue in located in the center of roots, but it splits and is around the outside in the stem in order to best absorb sugars that are produced. Photosynthesis is in the palisade mesophyll layer Roots: • Movement of water is free • Movement of nutrients usually is free, but sometimes does require use of ATP to move it across a gradient • Cation Exchange (will be on the test) o Put out protons to be able to absorb cations PH level affect absorbance of minerals. Some can only be taken up at certain PH levels. The PH of the soil determines what type of plants can grow there depending on what material the plant needs to be able to absorb. Casparian strip • protects plant from poisons leaking in/out. It is a protective filter before forign objects get into the vascular system. • Plant has control over what goes in to the vascular system Guttation: residual root pressure pushing water out (only works on small plants). Is shown by small drops of water on surface of leaves and stems in the morning. Stomata: • Uses ATP proton and Potassium pump to either open or close. • Stomata is open when humid and closed when dry to prevent loss of water. • Is behind water movement up the plant Potassium is important: used in opening and closing of stomata Chlorophyll has magnesium in center Mineral deficiencies are bad and cause abnormal/lack of growth Top 3 deficiencies: Nitrogen, potassium, and phosphorus Submergence 1A-1 gene inserted into rice to help prevent flooding from damaging the plant


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