Class Notes (839,559)
Canada (511,394)
BIOA02H3 (519)
Lecture 11

2013BIOAO2 Lecture 11.docx

3 Pages
85 Views

Department
Biological Sciences
Course Code
BIOA02H3
Professor
Ivana Stehlik

This preview shows page 1. Sign up to view the full 3 pages of the document.
Description
2013BIOAO2 S Module 1 January 7 ~Feb1 2013 Midterm date: Monday Febuary 4 2013. 5-7pm Module 2: Begins on Tuesday Feb 5 . th Total: 12 lectures Lecture outline: 1-2: Tree of life-plants 3-4 Plant cells and plant tissues 5-6. From seed to tree 7-8. From tree to seed 9. Transport in plants 10. Plant nutrition and soils 11. Plant defense 12. Plant life on the edge. Lecture 11 notes (plant defense) A) Plants feed the world, but they do not really want to do so . . . Herbivory: the most widespread plant-animal interaction. Often least visible. Insect miners: between epidermis Mollusks Reptiles Small mammals Large mammals B) Plants defense mechanism Tissues and organs Chemical defense Primary vs Secondary-toxin compounds  Primary compounds-products of photosynthesis, protein synthesis such as carbohydrates, proteins, starches, cellulose. Simple essential to normal cellular function and life in general  Secondary compounds: products have no known direct function in basic metabolism. o Huge complexity of compounds, strict control of syntheiss o Chemical weapons agaisnt herbivores include toxins: saponine, cyanide, atropine, strychinine, caffeine, cannabinol, mustard oil, morphine, quinine. Defense mechanism can be systemic-always present or induced-sometimes present. Physical defense: mostly systemic. Chemical defense: often induced. There are 4 types of defense mechanism: 1. Systemic physical  Thorns& spines.  Trichomes: hair to prevent exposure to usn, used against herbivore  Passive hiding. Lithops.-pebble plants in Kalahari desert making them hardly eaten. They are filled with water and more apparent after rain when the flower shows.  Active hiding: touching leaves that fold in which it is triggered by electric current where signals travel through phloem  Make-believe: look like it’s eaten. Mimics insect eggs. (e.g passion flower, virginia water leaves. White blotches intepret for other insects have eaten it already) 2. Systemic chemical  Cyanide in Bracken fern Cyanogenic glycosides ( Pteridium aquilinum). This poisons cattle and cause blindness/cancer to mammals  Poison ivy (toxicdendron radicans). Leaves of 3 with longer leaf stalk. Oil on your skins + phototoxin.  Systematic physical and chemical: stinging nettle: urtica dioica. Has thorns and pois
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit