Question

What happens when bulliform cells are flaccid?

Answer 1

Bulliform cells are the large thin-walled, empty cells that occur in the epidermis of many grass leaves and that by their turgor changes cause rolling and unrolling of the leaves thus regulating water loss. when bulliform cells are flaccid, the leaves of grass close as the two sides of the blade fold up toward each other. Once adequate water is available, the leaves open again. When folded, the leaves are less exposed to sunlight, so they are heated less which prevents water loss.