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NTA AbhyasNTA Abhyas 2020Anatomy of Flowering Plants
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Parenchyma is the most simple and unspecialized tissue which is concerned mainly with the vegetative activities of the plant. The main functions of parenchyma cells are: (i) Storage of food materials, e.g., carrot, beetroot, etc. (ii) Chlorenchyma helps in photosynthesis. Aerenchyma helps in the floating of the aquatic plants (hydrophytes) and also helps in gaseous exchange during respiration and photosynthesis, e.g., Hydrilla. (iii) In the turgid state, they give rigidity to the plant organs. (iv) In an emergency, they behave like meristematic cells and help in the healing of the various plant injuries. (v) Sometimes they store secretory substances (ergastic substances) such as tannins, resins and gums; they are called idioblasts.