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प्रश्न
Very short answer question.
Why do diurnal changes occur in osmotic potential of guard cells?
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उत्तर
1. According to Steward, diurnal changes occur in the osmotic potential of guard cells due to starch-sugar inter-conversion.
2. Whereas according to Levitt active transport of potassium ions into the guard cells and out of them causes diurnal changes in the osmotic potential of guard cells.
3. Endo-osmosis and exo-osmosis occur due to diurnal changes in osmotic potential of guard cells.
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संबंधित प्रश्न
Describe C3 Pathway.
Describe the mechanism of opening and closing of stomata.
Explain the root pressure theory.
What is transpiration?
Answer the following question.
What is the significance of transpiration?
Which of the following term correctly describes the membrane which allows passage of certain substances more readily than others?
Match the columns:
| Column A (Scientist) | Column B (Theory) | ||
| (1) | Dixon and Joylly | (a) | Starch-sugar inter-conversion theory |
| (2) | Steward | (b) | Osmotic absorption theory |
| (3) | Atkins and Pristley | (c) | Non-osmotic absorption theory |
| (4) | Kramer and Thimann | (d) | Cohesion tension theory |
Write a short note on Structure of stomatal apparatus.
Аccessory cells of stomata are reservoirs of ______.
Statement I - During night, guard cells become flaccid.
Statement II - During day time, guard cells become turgid due to endosmosis.
In light of above statements, choose the most appropriate answer from the option given below.
