AP BIOLOGY

LABORATORY REVIEW

TRANSPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How does turgor pressure relate to a plant wilting?
A
A wilting plant = high turgor pressure
B
A wilting plant = high photosynthesis
C
A wilting plant = low turgor pressure
D
They are not related
Explanation: 

Detailed explanation-1: -turgor, Pressure exerted by fluid in a cell that presses the cell membrane against the cell wall. Turgor is what makes living plant tissue rigid. Loss of turgor, resulting from the loss of water from plant cells, causes flowers and leaves to wilt.

Detailed explanation-2: -The fluid presses the cell membrane against the cell wall so that turgor is what makes living plant tissue rigid. Low turgor, in other words, low water pressure, makes your plant soft and lifeless, and it’s the first sign of dehydration.

Detailed explanation-3: -Lower turgor pressure can mean that the cell has a low water concentration and closing the stomata would help to preserve water. High turgor pressure keeps the stomata open for gas exchanges necessary for photosynthesis.

Detailed explanation-4: -One significant function of the turgor pressure is to promote cell volume expansion (Kazuyuki et al., 1997), and the higher the turgor pressure is, the larger the leaf expansion will be (Liu et al., 2002). The magnitude of turgor pressure is determined by water potential and osmotic potential.

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