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Question : Howis food transported in plants ? |
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Answer» Solution :Foodis transported in plants through phloem which consists of sieve tubes,cells phloem parenchyma andcompanion cells. This transportof solubleproducts of photosynthesis is called translocation. Besidesthe products of photosynthesis , thephloem TRANSPORTS amino acids and other substances. These substances are DELIVERED to the storage organsof roots, fruitsand seedsand to GROWING organs. The translocation of food and othersubstances takes place in the sieve tubeswith the help of adjacentcompanion cells both in upward and downward direction. The translocation in phloemis achieved by utilising energy. Material like sucrose in transferred into phloemtissue energy from ATP. Thisincreases the osmotic pressure of the tissuecausing water to move into it .This pressure moves the materials in the phloem to TISSUES which have less pressure. Thisallows the phloem to move material according to theplant.s needs. For example, in the spring, sugar stored in root or stem tissue wouldbe transported to thebubs which needenergy to grow . |
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