PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The root pressure
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Transpiration in the leaves
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Accumulation of minerals and water in leaves
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The intake of water by sieve tubes in the leaves
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Detailed explanation-1: -It is stated by the mass flow hypothesis that the translocation of glucose and other sugars within phloem are caused by a never-ending flow of water and dissolved nutrients between the source (a place where sugars are made) and sink (where sugars are utilized).
Detailed explanation-2: -According to the pressure flow hypothesis, food is prepared in the plant leaves in the form of glucose. Before moving into the source cells present in the phloem, the prepared food is converted into sucrose.
Detailed explanation-3: -In Plants, the mechanism explained for the translocation of sugars from source to sink is referred to as the pressure-flow hypothesis. Glucose generated by photosynthesis at the source is converted to sucrose which is moved to the phloem sieve tube cells through the companion cell by active transport.
Detailed explanation-4: -The Mass Flow Hypothesis was first proposed by German plant physiologist Ernst Munch in the year 1930. He theorised the movement of sap through the phloem tissue in plants. This theory is also known as the Pressure Flow Hypothesis.