stomata

Against bacteria, bladder cells are a physical obstacle to the stomata, which are entry ways into the plants.

Higher CO2 concentration reduces the loss of water, since the stomata don't need to be open as long.

Higher atmospheric CO2 levels mean that plants can obtain the CO2 they need more easily, with the stomata in their leaves not having to open as much.

Interestingly, all Balanophoraceae appear to lack stomata entirely, which is highly unusual in the plant kingdom beyond submerged aquatics.

This allows them to keep their stomata closed much more of the time, so they lose less water through transpiration.

This is true particularly for the underside of the leaf where the stomata are usually located.

Plants only uptake CO2 when they can open stomata, which is when they won’t dry out.

During the day, they close their stomata, cleave CO2 off of the acid to increase the concentration, and let RuBisCO its thing.

At night, they open their stomata, and use CO2 to build an acid.

They do this by opening and closing small gates known as stomata [0].

Consequently, they loose less water through the stomata, and are more drought resistant.

One difference at night is that it is cooler, so less water may be lost when the stomata are opened for gas exchange.

And finally, some plants only "breathe," at night in order to save water - I also remember this (many if not most plants control water loss through transpiration by shutting down their stomata during, but I'm pretty much sure that no plants are able to photosynthesise at night!