Things to Know What happens to all the light striking the earth’s surface Light attributes –Quality –Quantity –Duration Plant pigments –Imp. Wavelengths –Actions Photoperiod response –Long-day –Short-day –Day-neutral –Important dates (why?) Ps Reaction –Basic –C 3, C 4, CAM
Quiz Questions Give the basic photosynthesis reaction and where does it take place? Describe the characteristics of C-3 and C-4 plants. Give examples of a C-3 and C-4 plant. Describe the differences between a C-4 and CAM plant. Give an example of a CAM plant. What is a ‘short-day plant’? ‘long-day plant’? ‘day-neutral plant’? How do plant ‘tell time’? What’s the reaction? Why do C-4 plants have a higher rate of photosynthesis. Describe leaf morphology of both.
Light and Photobiology Electromagnetic Spectrum Energy (kcal/cm Wavelength (nm)
Photosynthesis Leaf Tissues & Function Tissue –Epidermis –Guard cells & stomates –Chlorophyll- containing cells –Veins Primary Functions –Protective cells (keep water within leaf) –Allow CO 2 & O 2 diffusion for Ps & Rs –Manufacture ATP & glucose –Translocate H2O and nutrient to, and CHO & AA away from, the leaves