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(a)(b)What is translocation? Why is it essential for plants ?Where do the substances in plants reach as a result of translocation? |
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Answer» a)Translocationisthemovement of materials inplantsfromtheleaves to other parts ofthe plant. Nutrients, mainly sugars, are created intheleaves during photosynthesis. These are then transported throughoutthe plantthrough phloem, which arealong series of connected cells. b)Plants producecarbohydrates(sugars) in their leaves by photosynthesis, but nonphotosynthetic parts of the plant also require carbohydrates and otherorganicand nonorganic materials. For this reason, nutrients are translocated from sources (regions of excess carbohydrates, primarily mature leaves) to sinks (regions where the carbohydrate is needed). Some important sinks are roots, flowers, fruits, stems, and developing leaves. Leaves are particularly interesting in this regard because they are sinks when they are young and become sources later, when they are about half grown. |
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