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Question

The large empty colourless cells seen on the upper epidermis in grasses which facilitate the curling of leaves to minimise water loss are

The correct answer is

Bulliform cells

The isobilateral (monocot) leaf of grasses shows a special adaptation in its adaxial (upper) epidermis to reduce water loss.

Along the veins, some adaxial epidermal cells are modified into large, empty, colourless cells called bulliform cells. When they are turgid, the leaf surface stays exposed; when they lose water and become flaccid, the leaf curls inwards, reducing the exposed surface and thus water loss.

Guard cells are bean- or dumb-bell-shaped cells that open and close the stomatal pore. Subsidiary cells are specialised epidermal cells lying around the guard cells. Mesophyll cells are the chlorophyll-containing ground tissue between the two epidermal layers, carrying out photosynthesis; none of these causes leaf rolling.

Bulliform cells option is correct.

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Similar Questions

  1. A student was given a bisexual, actinomorphic pentamerous, gamosepalous and gamopetalous with 5 stamens in epipetallous condition and bicarpillary syncarpour superior ovary and asked to state the floral formula. Which one of the following is the correct floral formula for the given flower?

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Important Questions from Structural Organisation in Plants and Animals

  1. A student was given a bisexual, actinomorphic pentamerous, gamosepalous and gamopetalous with 5 stamens in epipetallous condition and bicarpillary syncarpour superior ovary and asked to state the floral formula. Which one of the following is the correct floral formula for the given flower?

  2. Find the incorrect statement among the following with respect to digestive system of frog.

  3. Identify the flower with polyadelphous condition.

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