[Auntie Dem]

Do you think the leaves just might weigh more at night because they collect dew on their surface? Obviously, the extra weight of all the leaf’s moisture would make the branch sag. But then I’m not a scientist, so what do I know?

[Carriage Hill]

Plants absorb sunlight during the day, and make 0₂ and sugars at night. All those billions of leaf cells undergoing photosynthesis are very busy, but apparently it's less stressful than the absorption process.

Years ago, we did some time-lapse photography studies with PSU and showed plants stretching, moving and growing at night.