Photosynthesis & the Environment

Terms in this set (16)

photorespiration

reaction in which rubisco attaches oxygen instead of carbon dioxide to ribulose bisphosphate

process by which plants use the sun's energy to convert water and carbon dioxide into sugars

the enzyme that catalyzes the first step of the Calvin cycle

CO2 from Photosynthesis - photorespiration - respiration

O2 from Photosynthesis - photorespiration - respiration

Light response curve

Rate of photosynthesis:

Increases proportionally with increase in irradiance

Higher CO2 levels

increase in rate of photosynthesis

Higher levels of O2

inhibit photosynthesis

competes with CO2 for active site on rubsico

Photorespiration produces _____ instead of 2 PGA

PGA & phospholycolate

Amount of fixed carbon los to photorespiration

As temperature increases rate of photosynthesis decreases because

stomata cloase to regulate water loss, causing decrease in CO2 concentration

Photosynthesis is more effiecienct in _____ temperatures

Shade plant leaves

thinner, broader, increased chlorophyll

;