More information: Shouguang Huang et al, Guard cells count the number of unitary cytosolic Ca 2+ signals to regulate stomatal dynamics, Current Biology (2024). DOI: 10.1016/j.cub.2024.07.086 ...

In plants, guard cells control the stomatal opening by expanding and contracting through ion flux. When a plant senses light, a signal is sent to the guard cell to increase its ion content, which ...

Carry out photosynthesis. Guard cells Open and close to control the exchange of gases – carbon dioxide, water vapour and oxygen. Phloem Sieve tubes Transport products of photosynthesis ...

At Parker County Jail in Weatherford, Texas a group of prisoners recently broke out of their cells to rescue a guard who'd slumped over and lost consciousness.The guard, the inmates later learned ...

It moves by diffusion through small holes in the underside of the leaf called stomata. Guard cells control the size of the stomata so that the leaf does not lose too much water in hot, windy or ...