Photosynthesis is necessary not just for plants to make food for themselves, but for animals, including us eventually.
It takes 114 Kcal to reduce one mole of CO2 to hexose, so the theoretical efficiency is 114/381 or 30%. Remarkably, Moore, et al. report that 25% has been achieved under laboratory conditions. The top efficiency they reported under natural growing conditions was the winter-evening primrose growing in Death Valley at 8% (if you can call Death Valley natural conditions!). Sugarcane has registered 7% , which is very important for a food crop. Sugarcane is a , and under high sunlight conditions they will usually outperform and others.
Discover how plants feed us and themselves through photosynthesis.
This phenomenon is called photosynthesis, and is the process of converting light energy (harvested from sunlight) into chemical energy (sugars) by the green plants.
What captures energy from sunlight during photosynthesis
It is evident from these absorption and output plots that only the red and blue ends of the part of the are used by plants in photosynthesis. The reflection and transmission of the middle of the spectrum gives the leaves their green visual color.
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Photosynthesis takes place in two stages, thefirst of which captures the energy, and the secondwhich makes sugars. The first one requires water,because the plant uses the hydrogen atoms in waterto collect the energy. The second requires both:sugar contains carbon, oxygen, and hydrogen, ofwhich the first two come from carbon dioxide andthe last, comes from water. The excess oxygen isreleased as oxygen gas.
Sunlight is needed for photosynthesis - eschooltoday
Now, during photosynthesis, sunlight energy is used to power chemical reactions thatcombine water with the air's carbon dioxide to form starchy carbohydrate. In other words,during photosynthesis, sunlight energy is stored in carbohydrate for later use. Here's asimplified chemical formula for photosynthesis
Photosynthesis - NatureWorks - NHPBS
The fundamental principle of photosynthesis is that plants open and close the stomata (pores) on the leaves, and thus control the amount of carbon dioxide and oxygen that passes through them.
Sunlight has many different colors in it
Don't lose sight of the fact that accordingto that wonderful chemical formula above, during photosynthesis leaves such as the RedMaple leaves at the left take two essentially transparent items -- carbon dioxide gas andwater -- and with energy from sunlight combine them into the substance making up thelargest part of any plant you look at. Look at the biggest tree and by golly it'smostly carbohydrate and water, and that carbohydrate has been produced from gas and water,with the process being fueled by sunlight.