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Transport in Angiosperms - International Baccalaureate Biology - Lecture Slides, Slides of Biology

These are the lecture slides of Biology. Key important points are: Transport in Angiosperms, Mineral and Water Uptake, Root System, Angiospermophytes, Ground, Regulate the Absorption, Transportation, Branching, Root Hairs, Cortex Cell Walls

Typology: Slides

2012/2013

Uploaded on 01/24/2013

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Transport in Angiosperms
Uptake in the Root
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Transport in Angiosperms

Uptake in the Root

The Root: Mineral and Water Uptake

  • The root system in Angiospermophytes is designed for uptake of materials from the ground/soil.
  • Xylem is the tissue involved, but does not regulate the absorption.
  • Xylem is the vessel for transportation.

Branching

  • Roots can branch out, forming vast networks of roots.
  • The larger the plant, the larger the root size and branching area.
  • Allows roots to reach deeper and/or to cover more area.

Large Tree Roots

Root Hairs

  • Tiny, hair-like out growths of the root.
  • Adapted for absorption of water and solutes.
  • Only survive a few days, and only grow a few millimeters.

Root Hairs

Mineral Ion Uptake

  • Roots uptake mineral ions through a process called active transport.
  • Active transport requires energy.
  • Energy comes from the high number of mitochondria found in the root hair cells.

Mineral Ion Uptake – Solute

Particle

Mineral Ion Uptake

  • Root hair cells have protein channels that allow the active transport to take place.
  • The mitochondria use aerobic respiration to produce the NRG – Need to understand only that aerated soils are best because aerobic respiration needs oxygen.
  • Roots absorb potassium, phosphate, nitrates, and other mineral ions from soil.

Water Uptake – Water Particles

Water Uptake in the Root

  • There are two main pathways that the water can follow through the root. - Symplastic Pathway - Apoplastic Pathway