Where are bulliform or motor cells found and their functions?

1.	Where are bulliform or motor cells found and their functions?
Answer» Bulliform cell. Bulliform cells are large, bubble-shaped epidermal cells that occur in groups on the upper surface of the leaves of many monocots.These cells are present on the adaxial or the upper surface of the leaf. They are generally present near the mid vein. These cells are large, empty and colourless.The important functions of bulliform cells are:\tIt is mainly concerned with storage of water.\tDuring the water stress condition in leaf minimize by curling the leaf inwards.\tIt is concerned with the rolling and unrolling of the leaves.\tIt is also concerned with the hygroscopic opening and closing movements of mature leaves.\tIt helps in transpiration process.

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