19 Questions
What are the various mechanisms that drive the rise of water in plants?
Root pressure, suction force of leaves, adhesive force of water molecules, capillarity of vessels, and imbibition of cell membranes
What are the mechanisms that drive the rise of water in plants?
Cohesive force of water molecules and capillarity of vessels
Which mechanism is more important in the spring and decreases as plants grow?
Root pressure
Which mechanism is more important in the spring and decreases as plants grow?
Root pressure
Which force is predominant throughout the vegetation?
Suction force of leaves
What is the process of eliminating water in a gaseous state specific to?
Terrestrial plants
What determines the intensity of transpiration?
Lack of water saturation in the atmosphere
What maintains the continuity of water column in woody capillary vessels?
Cohesive force of water molecules
What are the factors that influence water circulation speed in plants?
Species, age, and climatic conditions
What factors influence transpiration?
Number and position of stomata, degree of stomatal opening, light, atmospheric humidity, temperature, air currents, and soil water
What is guttation?
The process of eliminating water in a liquid form on the edge of the leaf
What is transpiration?
The process of eliminating water in a gaseous state
What determines the intensity of transpiration?
Lack of water saturation in the atmosphere
What is the liquid resulting from guttation?
A solution containing many substances
What is the role of transpiration in water absorption and cell turgor?
It participates in passive absorption of water and ensures normal turgor of all cells
What is the water balance of plants?
The ratio that exists between the amount of water absorbed and the amount of water lost through transpiration
When does water deficit occur in plants?
When the transpiration increases and the water balance becomes subunit
Which factors influence transpiration?
Number and position of stomata, degree of stomatal opening, light, atmospheric humidity, temperature, air currents, and soil water
What is guttation?
The process of eliminating excess water in a liquid state on the edge of the leaf
Study Notes
- The rise of water in plants is driven by various mechanisms including root pressure, suction force of leaves, cohesive force of water molecules, capillarity of vessels, and imbibition of cell membranes.
- Root pressure is more important in the spring and decreases as plants grow.
- Suction force of leaves is predominant throughout the vegetation.
- Cohesive forces between water molecules maintain continuity of water column in woody capillary vessels.
- Water circulation speed varies with species, age, and climatic conditions.
- Transpiration is the process of eliminating water in a gaseous state and is specific to terrestrial plants.
- Transpiration is determined by lack of water saturation in the atmosphere and is most intense in leaves.
- Transpiration participates in passive absorption of water and ensures normal turgor of all cells.
- Factors that influence transpiration include number and position of stomata, degree of stomatal opening, light, atmospheric humidity, temperature, air currents, and soil water.
- Stomatal movements occur as a direct reaction to the increase or decrease of the osmotic pressure of the vacuolar juice in the stomatal cells.
- Physiological reactions of stomata include photoactive, hydroactive, and hydropassive opening and closing.
- Stomata open in response to light and close in response to water deficit or excessive humidity.
- Stomata position and leaf morphology can affect transpiration rates.
- Light, atmospheric humidity, temperature, and wind can all influence transpiration.
- Water absorption from the soil is crucial for maintaining transpiration rates and preventing wilting.
- Guttation is a process where water is eliminated in liquid form on the edge of the leaf due to an imbalance between root absorption and transpiration.
- Guttation is the process by which plants eliminate excess water.
- The liquid resulting from guttation is not pure water, but a solution containing many substances.
- Herbaceous plants drop especially during periods of very intense activity, when they need more water and mineral salts.
- The water balance of plants represents the ratio that exists between the amount of water absorbed and the amount of water lost through transpiration.
- When transpiration increases, the water balance becomes subunit and water deficit occurs in plants.
- When the absorption is more intense than the transpiration, the water balance becomes overunited, and the guttation process takes place.
- Hydathodes can be closed (active) or open (passive).
- Closed hydathodes are in direct connection with conducting vessels.
- The role of guttation is important for plants, ensuring an upward movement of raw sap.
- Guttation ensures optimal internal conditions so that the plants do not suffer and the production is not substantially reduced.
Test your knowledge on the fascinating world of plant water transport with this quiz! From root pressure to transpiration and guttation, this quiz covers various mechanisms that drive water circulation in plants. Learn about the factors that influence transpiration rates, the physiological reactions of stomata, and the importance of water absorption for maintaining optimal plant health. With questions on plant water balance, hydathodes, and more, this quiz is perfect for anyone interested in plant physiology and biology. So, put your knowledge
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