Plant Physiology - Musiyenko M. M. 2001

Water regime of plants
Review questions and tasks

1. What is the Role of Water in the vital activity of a plant Organism?

2. Name the Structural Features of water molecules that determine their Physical and Chemical properties.

3. Characterize the State and Fractional composition of water in a plant.

4. What is The Significance of The phenomenon of osmosis and Hydration processes in a plant Cell? Explain what forces cause water to enter The Cell.

5. Which of the following water potential values is higher: 1) — 2000 kPa, 2) — 1000 kPa?

6. Why is The water potential gradient the driving force for the intake and Movement of water in a plant?

7. What is the relationship between osmotic pressure and water potential under normal atmospheric pressure?

8. When salts are added to a plant whose roots are immersed in pure water, temporary wilting may occur, but after a short period of time its turgor is restored. Explain The Nature of this phenomenon.

9. Why is top-dressing of crops with mineral fertilizers during a drought not only ineffective, but also harmful?

10. What are the pathways of short-distance and long-distance water transport in a plant?

11. Trace the path of a water molecule from a raindrop that has entered the soil to water vapor that has entered the air through the Stomata of the leaf surface. Describe the corresponding processes and name the physical forces that govern them at each stage.

12. What are the structural Features of the plant ROOT system in connection with its function of absorbing water from the soil solution?

13. How are the processes of Water uptake and evaporation regulated by plants?

14. Characterize the phenomenon of Transpiration. What is the difference between stomatal and cuticular transpiration?

15. What is guttation and plant "bleeding"?

16. What are the features of the water regime in plants of different ecological groups?

17. Explain the following terms: field capacity, dead storage of soil water, wilting moisture.

18. When does a water deficit occur in plants, and what initial and subsequent consequences can it lead to?

19. What physiological indicators are used for irrigation Diagnostics?



Last update: 07/08/2026

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