Transport in plants G1.pptx Cambridge IGCSE

Transport in plants G1.pptx Cambridge IGCSE

• 1.
  TRANSPORT IN PLANTS
• 2.
  XYLEM AND PHLOEM Xylem and phloem are the two main transport system in plants .  They are collectively termed as Vascular bundle .  Vascular bundles are found throughout the root ,stem and leaves .  XYLEM  The xylem transports water and mineral ions .  PHLOEM  The phloem transports sucrose and amino acids .
• 5.
  COMPARING XYLEM ANDPHLOEM Xylem Phloem It is a complex tissue It is a complex tissue It consist of mainly dead elements It consist of living tissues It conduct water and minerals from the root to the aerial part of the plant It conducts prepared food from the leaves to storage organs and growing parts of the plants It is a dead cell It is a living cell It is a one way from the roots to leaves It moves in all directions
• 10.
  TRANSPIRATION
• 11.
  What is transpiration?  Transpirationis the loss of water vapour from leaves. Water forms a thin layer on the surfaces of the leaf mesophyll cells and evaporates into the air spaces in the air spaces in the spongy mesophyll .This creates a high concentration of water vapour inside the leaf than outside, water will diffuse out of the leaf through the stomata .Water evaporating from leaves causes suction, which pulls water up the stem.
• 16.
  TRANSLOCATION  The movementof sucrose and amino acids in phloem from sources to sinks .  S0URCES :Parts of the plants that release sucrose or amino acids .  SINKS :Parts of the plant that use or store sucrose or amino acids .