7-metabolism-1[1]

7-metabolism-1[1] - Welcome Back Today well start...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Welcome Back! Today we’ll start metabolism Photosynthesis will be next week We’ll select organisms for the organism project today Get a number from Sharon if you want to sign up When your number is called, head out to the course assistant’s office and put your name by a genus Signing up does _not_ obligate you to do this assignment; but it does let you start it Wednesday/Thursday in lab – Scientific writing Each person should bring 4 copies of a complete draft of their journal articles! Be sure you follow proper literature citation techniques! See the lab manual or Blackboard section for more information
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What if concentration gradients lead to “bad” things entering? E.g. copper Copper is an essential nutrient, so roots have channels that let copper enter But at high concentrations copper can be toxic Near copper mines the concentration gradient strongly favors copper entry to the roots Can lead to plant death What could the plant do?
Background image of page 2
Imagine that we have genetically engineered a plant to contain a copper transport protein in their epidermal cells but not endodermal cells. Where would we find copper in the plant? 1. Inside the endodermal cells 2. Inside the xylem 3. In the root cortex 4. Nowhere in the root; it couldn’t get in
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Your ideas Block/stop/don’t express the copper transport channel In either epidermis or endodermis Casparian strip in endodermis helps with this Use only active transport to absorb copper in the epidermis Store copper in the roots (cortex) or in dead parts of the plant Have copper bind to ions (or other molecules) in the root Have copper transported into cell vacuoles Pump (via cotransport) copper out of the roots Search out areas of soil with lower concentrations of copper Reduce the number of root hairs Die
Background image of page 4
Copper mine tailings Copper mine in Michigan ~6,500 acres of tailings Barren for 20+ years Initial test plots from the 1960’s failed All plants died within ~2 years Current researchers tested 14 plant species All known to be able to
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/11/2011 for the course ECON 100 taught by Professor Chandle during the Spring '11 term at UC Irvine.

Page1 / 23

7-metabolism-1[1] - Welcome Back Today well start...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online