What is a sunken stomata? Explain with example.

Sunken means hidden stomata or stomata those which are not directly exposed to surface. It is in a small pit, which protects the escaping water vapour from air currents, decreasing water loss from the leaf. This sunken stomata condition found in leaves of succulent xerophytes (hot desert plants) facing high temperature condition and gymnosperms. This sunken stomata condition found in leaves of succulent xerophytes (hot desert plants) facing high temperature condition and gymnosperms.

Some plants with SUNKEN STOMATA are Nerium, Pine, Acacia, etc. Plants growing mostly in xerophytic conditions have sunken stomata where they need to reduce transpiration rate. For e.g. Pinus , dracaena , yucca, opuntia etc.

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