Farmers can use their knowledge of these limiting factors to increase crop growth in greenhouses. They may use artificial light so that photosynthesis can continue beyond daylight hours, or in a higher-than-normal light intensity. The use of paraffin lamps inside a greenhouse increases the rate of photosynthesis because the burning paraffin produces carbon dioxide, and heat too.
nterestingly, three marine microalgae, , and , were studied for their rates of photosynthesis and carbon uptake mechanisms in continuous light vs. those same species in light/dark cycles (12 h on/12 h off and 16 h on/8 h off). The rates of photosynthesis were nearly twice as high with light/dark cycles as with continuous lighting. In two of the species ( and ), but not the third, the contribution of bicarbonate to the total carbon uptake increased dramatically in light/dark cycles compared to continuous light.
How does temperature affect the growth of algae …
Of course, the photosynthesis rate does not necessarily translate to growth rates. If other nutrients are limiting growth (nitrogen, phosphorus, iron, etc.), then it may not matter if the rate of photosynthesis is reduced at higher pH. But because these nutrients are often present in surplus in reef aquaria, it may well be that carbon uptake is limiting in some cases, and in those cases aquarists might benefit from ensuring that the pH is not too high.
The effect of ionic stress on photosynthesis in …
The agarophyte has been shown to take up carbon in this fashion. It has carbonic anhydrase both inside the organism and out. Inhibiting either of these types of carbonic anhydrase greatly decreases photosynthesis, but adding an anion transport inhibitor does not. Adding TRIS buffer to the extracellular fluid (seawater) also has no effect (the purpose of which is discussed in the following section relating to proton pumping as a possible mechanism).
Does the temperature of my pond water effect the oxygen supply
Freshwater algae, on the other hand, can sometimes obtain all of their required carbon dioxide by passive uptake. While a review of such literature is unnecessary in this article, I'll give one example. The freshwater chrysophyte alga, , has been shown to have none of the more sophisticated mechanisms for carbon dioxide uptake that are described later in this article, and it relies on simple passive uptake. For this reason it has been shown to photosynthesize most effectively where carbon dioxide concentrations are high, at pH 5-7.
Effect on Growth, Photosynthesis, ..
In most cases, however, this process can account for only a portion of the demand for carbon dioxide. The rate at which carbon dioxide is used by rapidly photosynthesizing organisms is fast enough that organisms can deplete the carbon dioxide in the surrounding seawater faster than it can be replaced by diffusion and other transport mechanisms through the seawater. The depletion is readily observed by the pH in the near surface regions of these organisms, where the pH rises due to carbon dioxide loss. For this reason many marine organisms have developed other means of obtaining carbon dioxide, including processes involving bicarbonate.
Photosynthesis Lab Draft - The Effect of Heat on ..
For the right curve, the impact that the major have on the amount of IR that Earth emits to space is clear: carbon dioxide, , and water vapor act together to absorb and re-emit radiation that stays trapped in the lower atmosphere (that is, the outgoing radiation from Earth is much less intense than expected from the temperature one would measure in space due to the effect of greenhouse gases).