Phloem Structure Living Cells Move particles in various directions

Slides:

Advertisements

Similar presentations

Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Active Lecture Questions for use with Classroom Response Systems Biology, Seventh.

Advertisements

Outline the Role of Phloem in Active Translocation of Sugars (sucrose) and amino acids from source (photosynthetic tissue to storage organs) to.

Transport in Plants.

Water and dissolved minerals move through xylem.

Recap - Starter State 3 differences between xylem and phloem structures State the differences between the symplast and apoplast pathways Define transpiration.

Transport in Plants.

36 Resource Acquisition and Transport in Vascular Plants.

Translocation in the Phloem

Why are plants important? PhotosynthesisCellular Respiration.

NOTES: CH 36 - Transport in Plants

Transport in Plants (Ch. 36) Transport in plants H 2 O & minerals – transport in xylem – Transpiration Adhesion, cohesion & Evaporation Sugars – transport.

Transpiration. Slide 2 of 32 Transport Overview  Plants need CO 2, Sunlight and H 2 O in the leaves  ONLY H 2 O needs to be transported to the leaves.

Transport in Vascular Plants Chapter 36. Review: Cell Transport Passive transport: – Diffusion across membrane with concentration gradient, no energy.

Assimilate Transport Movement of substances through the phloem Chapter 30.

Plant Science 9.2 Transportation in the Phloem of plants.

Transpiration and pressure flow

CHAPTER 36 TRANSPORT IN PLANTS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section E: Translocation of Phloem Sap 1.Phloem.

To describe the structure and function of phloem 17 December 2015 WALT WILF Describe and recognise the components of phloem tissue Distinguish between.

Biology Sylvia S. Mader Michael Windelspecht

TRANSLOCATION Translocation is the transport of organic assimilates (e.g. sugars). It takes place in phloem tissue. Phloem tissue is composed of: Sieve.

Translocation in the phloem - Ch. 10.

Ch. 36 Plant Transport. Three levels of plant transport Uptake of water and solutes by individual cells Short distance cell to cell transport Long distance.

1 of x AS/A-LEVEL BIOLOGY Transport of organic compounds in plants - translocation To be used alongside AQA AS/A-level Biology transport of organic.

Chapter 29 Phloem. You Must Know How bulk flow affects movement of solutes in plants.

Translocation How the growing parts of the plant are provided with sugar to synthesize new cells Photosynthesis New growth Translocation The phloem is.

Plant Transport Chapter 36. What you need to know! The function of xylem and phloem tissue The specific functions of tracheids, vessels, sieve-tube elements,

Photosynthesis leads to production of reduced carbohydrates. G3P is exported from chloroplasts to the cytoplasm, where it is used to synthesize transportable.

PLANT TRANSPORT Advanced Biology Chapter 22 NOTES.

9.2: Transport in the phloem

Essential idea: Structure and function are correlated in the phloem of plants. By Chris Paine Transport in the phloem.

9.2 Transport in the Phloem of Plants

Lecture 10 Transport in Plants: Phloem Dr. Alan McElligott

9.2 Transport in the phloem of plants

HOW SUCROSE IS TRANSPORTED IN PLANTS

Transport in Vascular Plants

Xylem and Phloem.

Resource Acquisition and Transport in Vascular Plants

Red Hunting – Topic 4 Transport in Plants

All to collect hand out and use as I go through the lecture

9.2 Transport in the Phloem of Plants

Plant Transport.

Active Translocation Translocation is the movement of organic compounds (sugars, amino acids) from source to sinks. The source is where the organic compounds.

9.2 Transport in the Phloem

Topic 9.2 – Transport in the phloem of plants

Water and dissolved minerals move through xylem.

Water and dissolved minerals move through xylem.

IB Biology Plant Science

Water and dissolved minerals move through xylem.

Transport and Circulation

9.2 Transport in the phloem of plants

Translocation in the Phloem

Transport in phloem Topic 9.2.

Transport in Vascular Plants

Plant Transport.

Water and dissolved minerals move through xylem.

Unit 9.2 Transport in the phloem

Water and dissolved minerals move through xylem.

TRANSPORT IN THE PHLOEM OF PLANTS

Module 2 Exchange and transport

Applications and Skills

Module 2 Exchange and transport

Water and dissolved minerals move through xylem.

Chapter 29 Phloem and Stomata.

Water and dissolved minerals move through xylem.

Water and dissolved minerals move through xylem.

Presentation transcript:

Phloem Structure Living Cells Move particles in various directions Organic molecule movement via phloem Source Sink Use or store sugar (roots/fruits) Net producer of sugar Photosynthesis (leaves) or hydrolysis (tubers) Sieve plate Companion Cell Has nucleus, dense cytoplasm Sieve tube member/element Lacks nucleus, cytoplasm, is hallow

Translocation: movement of organic molecules – ‘phloem sap’ Sugar (sucrose) Amino Acids Plant hormones Small RNA molecules Swelling occurs Removal of bark (living phloem) Causes tree death

Techniques in Analyzing Phloem Sap Aphid Stylets Feed by inserting stylets (mouth structure) into sieve tube Pressure in tube forces sap into aphid Cut the stylet with laser – free of contaminates Analyze ‘sap’ contents

Techniques in Analyzing Phloem Sap Radioactive Carbon (C14) radioactive Plant uptakes during photosynthesis – incorporates into sucrose Watch to see where sucrose goes in plant

Pressure-flow hypothesis for translocation 1. Loading sugar at source Reduces water concentration in sieve tube  causing osmosis 2. Uptake of water creates hydrostatic pressure – results in flow of sap Produced by compression of liquid or addition of solute into liquid in confined area 3. Hydrostatic pressure diminished by removal of sugar at sink Increases pressure – allows for flow Turned into starch Insoluble (no osmotic effect) 4. Xylem recycles water

Active transport at source and sink Chemiosmotic process Proton pumps and specialized membrane proteins (co-transport) Allows passive and active transport