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How is epidermis of a leaf different from that of root? Explain.

Answer» The\xa0epidermis\xa0is an outer protective covering tissue of plant roots, leaves, and stems of nonwoody plants. It contains closely packed epidermal cells.Modifications of epidermis of roots, stem and leaves:\tWalls of epidermal cells are covered with\xa0a waxy\xa0cuticle\xa0to minimise water loss and protect against bacteria.\tIn roots, certain epidermal cells are modified into\xa0root hairs\xa0that increase surface area of the root for absorption of water and minerals and help to anchor the plant firmly in place.\tProtective hairs\xa0of a different nature are produced by epidermal cells of stems and leaves.\tEpidermal cells may be modified as\xa0glands\xa0that secrete protective substances of various types.\tIn leaves, particularly the lower epidermis, specialized epidermal cells\xa0(guard cells)\xa0form microscopic pores\xa0(stomata)\xa0and regulate gas exchange between interior and exterior of a leaf.The roots, stem and leaves of plants are modified for storage of food or protection to the plant.\tRoot modificationsAdventitious and prop rootsE.g. MaizePneumatophoresE.g. MangrovesVelamen rootsE.g. OrchidsFleshy rootsE.g. CarrotStem modificationsTendrilsE.g. GrapesCladophyllsE.g. AsparagusThornsE.g. BougainvilleaStorage stemsE.g. Onion bulbsRunners/StolonsE.g. StrawberryLeaf modificationsSpinesE.g. CactiBractsE.g. BougainvilleaCarnivorous leavesE.g. Venus flytrapTendrilsE.g. PeasPlantletsE.g. Kalanchoe\t


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