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प्रश्न
Very short answer question.
Why do diurnal changes occur in osmotic potential of guard cells?
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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| Column A (Scientist) | Column B (Theory) | ||
| (1) | Dixon and Joylly | (a) | Starch-sugar inter-conversion theory |
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| (3) | Atkins and Pristley | (c) | Non-osmotic absorption theory |
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