Class Notes (836,580)
Canada (509,856)
Biology (25)
BIOL 1130 (25)
Berkley (25)
Lecture

Biology - Day 31.docx

2 Pages
114 Views
Unlock Document

Department
Biology
Course
BIOL 1130
Professor
Berkley
Semester
Fall

Description
Biology Day 31 Monday November 26, 2012 Plant Biology Transpiration – water is lost by evaporation at the leaf surface. - Stoma – must be open to lose water - Wp will be made lower by active transport of K ions into the guard cells - Causes the cells to become turgid and the small openings (stoma) are evident - Requires active transport Need ATP from photosynthesis - 1 corn plant transpires an average of 15 L/week - Roughly 150,000 L/hectare/day - For stoma to close  K ions flow out of the guard cells  Wp outside is lower and H 2 flows out of guard cells and stoma are closed Guttation - Method of relieving Water pressure in the plant xylem during darkness - Specialized cells – hydathunder  located at tips of leaves of specific plants - Releases liquid H 2 onto leaf surface Transport of Sugars Under pressure Flow Hypothesis - Sugars flow from the source (leaves) to where needed (sink) Source - Sugars enter sieve tube by active transport (needs energy) - Will cause Wp to decrease and H 2 flows into the tubes - This increases the turgor pressure Sink - Location where sugars will be removed (actively) - Causes the Wp to decrease outside the sieve tubes and H2O flows out and H 2 diffuses back to the xylem Mineral Nutrition - Nutrients enter the roots and move to the endodermis by passive transport - Must cross the endodermis (casparian strip) against a concen
More Less

Related notes for BIOL 1130

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