PLANTS
TRANSPORT IN PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Leaves placed in dark areas.
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Water moving into the guard cells.
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Leaves that are suffering in a drought.
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Water moving out of the guard cells.
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Detailed explanation-1: -The solute potential resulting high concentrations of potassium, chloride, sucrose, malate, and nitrate in the cytosol drives the osmosis of water into the the guard cells. This increases turgor pressure, and the guard cells expand and bend, opening the stoma (Figure 17.1. 2.2.
Detailed explanation-2: -As the potassium ions accumulate in the guard cell, the osmotic pressure is lowered. A lower osmotic pressure attracts water to enter the cell. As water enters the guard cell, its hydrostatic pressure increases.
Detailed explanation-3: -Stomata are pores on the leaf surface, which are formed by a pair of curved, tubular guard cells; an increase in turgor pressure deforms the guard cells, resulting in the opening of the stomata.
Detailed explanation-4: -The aperture of the stomatal pore is controlled by the two guard cells. When the guard cells are fully turgid the pore gapes open, whereas when they lose turgor the pore closes.
Detailed explanation-5: -Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing.