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Which of the following helps in the absorption and upward movement of water and minerals dissolved in it from roots to the leaves?
Photosynthesis
Translocation
Respiration
Transpiration
Transpiration
Transpiration is the biological process by which water is pulled up from the roots to the leaves of a plant. As water evaporates from the stomata of the leaves, it creates a negative pressure (suction) that draws water and minerals upwards through the xylem tissue.
Transpiration is the biological process by which water is pulled up from the roots to the leaves of a plant. As water evaporates from the stomata of the leaves, it creates a negative pressure (suction) that draws water and minerals upwards through the xylem tissue.
Think of it like drinking a milkshake through a straw: the evaporation at the leaves acts like your mouth creating suction, pulling the 'liquid' (water/minerals) up the 'straw' (xylem) from the 'cup' (soil/roots).
JtransтАЛ=r╬иleafтАЛтИТ╬иrootтАЛтАЛ тАФ Simplified expression of water flux due to water potential gradient
This process, often called the Cohesion-Tension theory, relies on the physical properties of water. Water molecules exhibit strong cohesion (attraction to each other) and adhesion (attraction to xylem walls), creating a continuous water column that is pulled up by the 'transpiration pull' generated by the evaporation at the leaf surface.
Transpiration is the primary driving force for water transport in plants.
It also helps in cooling the plant surface.
The xylem is the specialized tissue responsible for the upward conduction of water.
Minerals are absorbed from the soil along with water and transported via the same path.
Enables mineral transport from roots to all plant parts.
Regulates plant temperature via evaporative cooling.
Maintains turgor pressure for structural support.
Can lead to excessive water loss in arid environments, causing wilting.
Nutrient distribution in agricultural crops.
Forestry and plant physiology research.
Photosynthesis is the process of making food using CO2, water, and sunlight.
Translocation is the movement of synthesized sugars (food) through the phloem.
Respiration is the process of releasing energy by breaking down glucose.
D is correct тАФ Transpiration creates the upward pull necessary to move water and dissolved minerals from the roots to the leaves through the xylem.
Remember: Xylem transports water (upwards only), while Phloem transports food (both directions).
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