Do plants take a lunch break no matter what the weather is like?

It is usually a lunch break when it is hot in summer.

According to analysis, the raw materials of photosynthesis are carbon dioxide and water, while carbon dioxide enters through the stomata of leaves and water is absorbed from the soil by the roots of plants. Therefore, in the summer noon of 12, due to the excessive light intensity, in order to reduce transpiration and prevent excessive water loss, stomata were closed, which reduced the absorption of carbon dioxide, thus inhibiting the progress of photosynthesis and leading to the decline of photosynthesis rate. The decrease of root water absorption capacity has little effect on photosynthesis, so the most likely reason for the decrease of photosynthetic capacity at noon 12 is that stomata are closed and carbon dioxide cannot enter leaves.