Question

Which type of plants have negative root pressure

Answer 1

Answer:

Clark (1874) tested over 60 species of woody plants in Massachusetts and found exudation from only a few species, including maple, birch, walnut, hop hornbeam, and grape. Sap flow ceases as leaves develop and increasing transpiration produces negative pressure or tension in the xylem sap.

Answer 2

In this question, we are asked to tell which type of plant has negative root pressure.

• Negative root pressure occurs in plants with an excessive rate of transpiration.
• During the night, when absorption is at its highest and evaporation is at its lowest, root pressure typically builds.
• The respiration is at its highest during the day. Guard cells and other epidermal cells flake off as a result of water loss during transpiration.
• From the film, they draw water. As a result, the jellyfish vessels experience a negative pressure or tension that moves through the stem from the leaf surfaces to the roots.
• Following C. Clark's research, more than 60 kinds of woody plants have been examined, and only a few species, such as grapes, maple, birch, and hornbeam, have been discovered.
• Negative pressure, which stops the leaves, is caused by sap flow.
• It has been established that the peak of transpiration occurs when there is negative pressure.
• The guard cells and other epidermal cells sag as a result of the water lost through transpiration. In turn, they absorb water from the xylem.
• As a result, the xylem vessels in the stem and from the surfaces of the leaves to the tips of the roots experience negative pressure or stress.

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