Nelumbo nucifera

Feb 24, 2019 • 4:19 AM UTC

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Shri Shivaji Science College,Amravati, Maharashtra. By shivangi .M. Ponkshe

Stomatal description:- As an aquatic plant with leaves that rest on the waters surface, the genus Nelumbo is characterised by its concentration of stomata on the upper epidermis of its leaves, unlike other plants which concentrate their stomata on the lower epidermis, underneath the leaf. The collection of water on the upper epidermis ,whether that be by rain, mist or nearby disturbance of water is very detrimental to the leafs ability to perform gas exchange through its stomata. Thus, Nelumbo’s ultrahydrophobicity allows the water droplets to accumulate together very quickly, and then roll off on the leaf very easily at the slightest disturbance of the leaf, a process which allows its stomata to function normally without restriction due to blockage by water droplets.

Leaf surface:- The leaves of Nelumbo are highly water repellent and have given the name to what is called the lotus effect. Ultrahydrophobicity is conferred by the usually dense layer of papillae on the surface of the Nelumbo leaves, and the small robust, waxy tubules that protrude off each papillae.