FORESTRY
PLANT PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the best words to describe sugar source and sugar sink
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Both are plants organ and act as storage
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Sugar sink can be either roots, fruit or mature leaves and sugar source is shoots
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Sugar source is where sugar enters the phloem and sugar sink is where sugar exits the phloem
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Companion tube carry food from a sugar source to a sugar sink
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Explanation:
Detailed explanation-1: -At sinks, sugars are transported out of the phloem into surrounding cells. This withdrawal of sugars causes water to leave the sieve tube, again by osmosis, reducing turgor pressure at the sink end. It is the difference in turgor pressure that drives the movement of phloem sap from source to sink.
Detailed explanation-2: -Mature leaves and storage roots produce sugar sources. Sugar sinks include growing leaves, flowers, fruits, and roots. Leaves and storing roots are two examples of organs that can be either (which are sinks in summer during the active growing season and sources in spring at the beginning of a growing season).
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