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When it is too hot for photosynthesis: ..

If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.

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Plants cannot photosynthesise if it gets too hot

One reason for that conclusion involves greasy molecules called quinones, which help transfer electrons in photosynthetic reaction centers. Every reaction center studied so far uses bound quinones as intermediates at some point in the electron transfer process. In photosystem I, the quinones on both sides are tightly bound; in photosystem II, they are tightly bound on one side, but loosely bound on the other. But that’s not the case in the heliobacterium reaction center: Redding, Fromme and Gisriel did not find permanently bound quinones among the electron transfer chain’s stepping stones at all. That most likely means its quinones, although still involved in receiving electrons, are mobile and able to diffuse through the membrane. The system might send electrons to them when another, more energetically efficient molecule isn’t available.

The oxygen is the waste product from photosynthesis and therefore goes into the atmosphere.

· Temperature- if the temperature increases, then the rate of
photosynthesis also increases, (however, temperatures above 40OC can
damage a plant and photosynthesis stops because the chlorophyll gets
too hot).

is too hot or too cold for photosynthesis to work well.

Lamp- This will act as the sun, providing the light energy needed for photosynthesis.

That hypothesis contradicts one of the widely held ideas about the origins of photosynthesis: that species incapable of photosynthesis suddenly obtained the capacity through genes passed laterally from other organisms. According to Cardona, in light of the new discoveries, horizontal gene transfer and gene loss may both have played a role in the diversification of reaction centers, although he suspects that the latter may have been responsible for the earliest events. The finding, he said, might suggest that “the balance skews toward the gene-loss hypothesis”—and toward the idea that photosynthesis was an ancestral characteristic that some groups of bacteria lost over time.

That timing would have been early enough to predate the cyanobacteria typically credited as the first organisms to perform oxygenic photosynthesis. According to Cardona, it may be the case that a lot of bacteria could do it, but that after mutations, divergences and other events, only cyanobacteria retained the ability. (Cardona published a citing other molecular evidence for this hypothesis. He has not yet formally presented arguments about the potential link involving calcium for peer review, but he has written about the idea in and on a , and he recently began working on a paper about it.)

Why does photosynthesis stop when it gets too hot? | …

Therefore, if it is not photosynthesizing well not much oxygen will be produced.

For photosynthesis to occur, plants need:

· Light energy from the sun

· Chlorophyll to absorb light energy

· from the atmosphere and from respiration in plant

· Water which is absorbed by the roots and transported to the leaves
by the xylem tubes.

Oddly enough, of all the solar radiation striking a plant, only about 1 percent is used in photosynthesis. The rate of photosynthesis is dependent on several things, especially the amount of light received ... up to a point. As solar radiation increases the rate of photosynthesis increases. For many plants there is an upper limit to the rate of photosynthesis. In some plants as incident solar radiation increases the rate of photosynthesis levels off, or may decrease. The increasing solar energy load causes the plant to be too hot and the need to cool the plant increases. As a result, transpiration takes over as the dominate plant process. Transpiration, the loss of water from plants, acts to cool the plant by releasing latent energy. Adequate supplies of water, carbon dioxide and the availability of nutrients in the soil affect photosynthesis.

This means there are more leaves, therefore more chlorophyll to produce more oxygen during photosynthesis.
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  • 12/01/2018 · Limiting factors of photosynthesis

    If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.

  • Photosynthesis has 3 limiting factors: ..

    If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.

  • Photosynthesis - Science & Biology

    Plants cannot photosynthesise if it gets too hot either as the enzymes controlling it are denatured.

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If there is too much oxygen, ..

Result Table:

Distance between the Elodea and the lamp (cm)

Number of oxygen bubbles produced in 5 minutes

1st experiment

2nd experiment


























The result table shows the number of oxygen bubbles the Elodea plant
produces in 5 minutes, during photosynthesis, at each of the distances
between the lamp and Elodea, for the first and second experiment and
also and average of the number of oxygen bubbles produced for both

BBC - GCSE Bitesize: Factors limiting photosynthesis

Amandeep Virk



PREDICTION: I predict that as light intensity increases the amount of
oxygen produced by photosynthesis will increase too.

Photosynthesis | S-cool, the revision website

Analysing my evidence:

From my investigation I found out photosynthesis is limited immensely
by light intensity: the greater the light intensity, the higher the
rate of photosynthesis or the lower the light intensity, the lower the
rate of photosynthesis (for this investigation, the more or less
number of oxygen bubbles is produced).

Photosynthesis Photosynthesis is the way that plants ..

Therefore light is a limiting factor because the rate of
photosynthesis can increase if the intensity of light is strong, but
only to a point, after that the rate of photosynthesis stays constant.

which usually means it is cooler too, ..

Ugliness of Fruit Produced in Hot Weather
Virus, Bitterness and Temperature

If the "beauty is only skin deep" philosophy is true, then logically, it should follow that ugly is only skin deep too. If you can accept the fact that ugly is only skin deep, and that ugly and flavor are not necessarily culinary partners, then eating the malformed, odd-colored garden produce that shows up at this time of the year should not present a major problem. Regardless of what people say, most of us eat with our eyes—if something doesn't look right, most of us will think it doesn't taste right.

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