Original video: https://youtu.be/CNa3HMMiFU4
Delivered on: 18APRIL2022
Water: The Essence of Plant Life - Properties and Importance in Photosynthesis 💧🌱
This video delves into the fascinating world of water and its crucial role in plant physiology, particularly in the process of photosynthesis. 🌿 We'll explore the unique properties of water, its movement within plants, and its significance in maintaining plant health and productivity.
What you'll learn:
Properties of Water: We'll review the remarkable properties of water, including hydrogen bonding, high thermal conductivity, heat capacity, cohesion, adhesion, surface tension, polarity, and solvent properties.
Water Potential: Understand the concept of water potential and how it influences water movement in plants, from the soil to the atmosphere.
Water Potential Components: Explore the different components that contribute to water potential, including solute potential, pressure potential, and gravity potential.
Water Movement in Plants: Learn how water moves through the plant xylem, driven by water potential gradients, cohesion, and adhesion.
Capillary Action: We'll examine the phenomenon of capillary action, where water rises in narrow tubes (like plant xylem) due to surface tension and adhesion.
Pressure and Water Movement: Understand how pressure influences water movement and learn how to calculate the pressure needed to prevent water movement in a capillary tube.
Water Potential measures the concentration of free water molecules. It is a measure of the tendency of these molecules to diffuse to another area. The more free water molecules, the higher the water potential.
Water potential is negative in the xylem of virtually all terrestrial plants. Water potential is lowered by transpiration from the leaves assisted by the cohesive forces between water molecules causing water to be under tension, i.e., under negative pressure
Keywords: Water, plant physiology, photosynthesis, water potential, cohesion, adhesion, surface tension, capillary action, water movement, xylem, pressure, calculation.
Attribution 4.0 International — CC BY 4.0 - Creative Commons
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