Let's say a plant is surrounded by white light. When you increase the light intensity, why is it that the rate of oxygen production is unaffected?
Well, light doesn't have anything to do with the production of oxygen,what it really does is improve the growth condition of the plant. The more light a plant is given, the more it grows as light affects auxin in a plant.Auxin is the growth hormone in a plant.If side A of a plant get more light than sideB,A will grow faster than B
no, it will increase bud density. the heat will increase though.
Photosynthetic rate is affected by several factors - eg. light,CO2, temperature, so if there is sufficient light the rate will be limited by another factor such as limiting levels of CO2.
Actually, even if other resources are available in excess, photosynthesis (and oxygen evolution) will tend to level off (and sometimes decrease at real high light intensities) at high light intensities. The light intensity above which photosynthesis does not increase is called the light saturation point. The light intensity required to saturate the photosynthetic mechanism differs with species and the environment within which they've developed. Below are a couple of studies showing actual light response curves, it you're interested.
