2009 Abraham Handout Week 7

BICD 120 Fall 2009 Section: Wednesday 2-2:50PM, HSS 2321 OH: by appointment

TA: Abraham Tang [email protected] http://plantbuddy.wordpress.com

Dr. Crawford’s Lecture 2 1. Know the functions of Giberellin (GA). 2. Be able to draw and explain how GA stimulates seed germination. 3. What is the effect of GA in the stages of reproductive growth? Draw and describe the various stages. 4. What type of GA mutants can you have? What effects would you obtain if you added GA to these mutants? What if you added ABA? 5. What kind of stresses lead to ABA activity? Give some examples. 6. What are the 4 effects of ethylene? 7. Describe the triple response. 8. Know the Etr1 receptor. Be able to draw and describe how active ethylene response is obtained in the presence of ethylene. Dr. Crawford’s Lecture 3 1. How do macronutrients relate and differ from micronutrients? 2. Be able to list all of the macronutrients. 3. The casparian strip is found in the root, specifically surrounding the __________. The casparian strip blocks __________ and __________. 4. Ions can diffuse into root __________ (cell wall) up to casparian strip. To bypass casparian strip, H2O & ions must enter __________ (cytoplasm). 5. To access xylem in stele, ions (and H2O) cross a membrane via __________ transport. Be able to draw and explain the mechanism. 6. How does the proton cotransporter in ion transport into symplasm relate to auxin and cell elongation? 7. Water travels through xylem from roots to shoots via ___________________ theory. Be able to draw & describe this theory. 8. What is the initial driving force for transpiration? 9. Be able to draw & describe the mechanism for stomata opening & closing. 10. Sucrose travels through phloem from sources to sinks via ___________________ theory. Be able to draw & describe this theory. 11. Give some examples for sources and sinks. 12. What happens to transpiration if you introduce an air bubble into xylem tracheid vessel element? How about phloem sieve-tube element? 13. Nitrogenase is an enzyme that converts __________ to __________ . 14. T / F : Both plants and rhizobia can encode for nitrogenase enzyme. 15. Be able to list the steps involving Rhizobia and nodule formation. Ecclesiastes 11:6 (NIV) Sow your seed in the morning, And at evening let not your hands be idle, For you do not know which will succeed, whether this or that, Or whether both will do equally well.