HOW SUCROSE IS TRANSPORTED IN PLANTS

Slides:



Advertisements
Similar presentations
TRANSPORT IN PLANTS.
Advertisements

Outline the Role of Phloem in Active Translocation of Sugars (sucrose) and amino acids from source (photosynthetic tissue to storage organs) to.
Transportation of Water
Translocation. Transports water in the xylem Transports food and minerals in the phloem.
Transport in Plants.
Transport in Plants Three levels: at cellular level
Water and dissolved minerals move through xylem.
Water transport in plants
Plant Transport.
Ch. 4 Plant Physiology.
Translocation in the Phloem
Plant Transport of Water and Nutrients
NOTES: CH 36 - Transport in Plants
Plants Tissues part 2 Stem Leaf.
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.
Also Known As Chapter 36!! Transpiration + Vascularity.
Sugar and Water Movement in Plants
Water in Plants Chapter 9. Outline  Molecular Movement  Water and Its Movement Through the Plant  Regulation of Transpiration  Transport of Food Substances.
CHAPTER 36 TRANSPORT IN PLANTS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section E: Translocation of Phloem Sap 1.Phloem.
SECTION 13.4: TRANSPORT IN PLANTS
Translocation in the Phloem
Transport.
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.
TRANSPORT MECHANISMS WITHIN VASCULAR PLANTS
21.2 The Vascular System TEKS 4B, 5B, 10B, 10C The student is expected to: 4B investigate and explain cellular processes, including homeostasis, energy.
9.2: Transport in the phloem
VASCULAR PLANTS The largest group in the Plant Kingdom.
9.2 Transport in the Phloem of Plants
Chapter 11 Transport in Organism.
Maintaining a Balance Topic 14: Transport of Nutrients in Plants
Vascular tissues in plants
Xylem and Phloem.
Water and dissolved minerals move through xylem.
All to collect hand out and use as I go through the lecture
Plant Organs Stems: Structure & Function Transport in Plants
9.2 Transport in the Phloem of Plants
Transport and Circulation
Plant Transport Chapter 12.5.
Unit 3 Lesson 4 Transpiration and Translocation Systems
Active Translocation Translocation is the movement of organic compounds (sugars, amino acids) from source to sinks. The source is where the organic compounds.
Chap 23: Plants Part 5: Water Transport.
Water and dissolved minerals move through xylem.
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
Copyright Pearson Prentice Hall
9.2 Transport in the phloem of plants
Translocation in the Phloem
Transport in phloem Topic 9.2.
The cohesion-tension theory explains water movement.
TRANSPORT IN PLANT CELLS
Crossword!.
Water and dissolved minerals move through xylem.
Unit 9.2 Transport in the phloem
Water and dissolved minerals move through xylem.
Section 1: Nutrients and Transport
Module 2 Exchange and transport
Transport in Vascular Tissue
Applications and Skills
Transport in Vascular Plants
Module 2 Exchange and transport
Water and dissolved minerals move through xylem.
Transportation in Plants
Water and dissolved minerals move through xylem.
Water and dissolved minerals move through xylem.
Transport Within Plants
Presentation transcript:

HOW SUCROSE IS TRANSPORTED IN PLANTS TSAMWISI FORGET B1128107 PRESENTATION BZ004 TRANSPORT SYSTEM HOW SUCROSE IS TRANSPORTED IN PLANTS

INTRODUCTION Sugars, which are formed by the plant during photosynthesis, are an essential component of plant nutrition. Like water, sugar (usually in the form of sucrose, though glucose is the original photosynthetic product) is carried throughout the parts of the plant by the vascular system. Phloem, the vascular tissue responsible for transporting organic nutrients around the plant body, carries dissolved sugars from the leaves (their site of production) or storage sites to other parts of the plant that require nutrients. Within the phloem, sugars travel from areas of high osmotic concentration and high water pressure, called sources, to regions of low osmotic concentration and low water pressure, called sinks. (Osmotic concentration refers the concentration of solutes, or sugars in this case; where the concentration of solutes is highest, so is the osmotic concentration).

Sources The nutrient-rich regions that supply sugars for the rest of the plant are called the sources. Sources include the leaves, where sugar is generated through photosynthesis. When they are high in supplies, the nutrient storage areas, such as the roots and stems, can also function as sources. In the sources, sugar is moved into the phloem by active transport, in which the movement of substances across cell membranes requires energy expenditure on the part of the cell

Sinks Sinks are areas in need of nutrients, such as growing tissues. When they are low in supply, storage areas such as the roots and stems cane function as sinks. The contents of the phloem tubes flow from the sources to these sinks, where the sugar molecules are taken out of the phloem by active transport

Pressure Flow The mechanism by which sugars are transported through the phloem, from sources to sinks, is called pressure flow. At the sources (usually the leaves), sugar molecules are moved into the sieve elements (phloem cells) through active transport. Water follows the sugar molecules into the sieve elements through osmosis (since water passively diffuses into regions of higher solute concentration). This water creates turgor pressure in the sieve elements, which forces the sugars and fluids down the phloem tubes toward the sinks. At the sinks, the sugars are actively removed from the phloem and water follows osmotically, so that conditions of high water potential and low turgor pressure are created, driving the pressure flow process

Phloem transport sucrose Most carbohydrates manufactured in and other green parts are distributed through the phloem to the rest of the plant . this process is responsible for the availability of suitable carbohydrates building blocking in roots and other actively growing regions of the plant. Carbohydrates concentrated in storage organs such as tubers , often in the form of starch ,are also converted into transportable molecules such as and moved through the phloem. The glucose is used to make sucrose , which is transported in the phloem. This shows that the sucrose move up and down of the phloem

Shoot(sink) leaf (source) root (sink)

Transport of water by osmosis Active transport

SUCROSE IN LEAVES

MUNCH’MASS FLOW  However, Munch’s Mass flow or pressure flow theory enjoyed the support of many concomitant observations.  The mass flow theory is mainly based on the extreme concentration gradient between the source and the sink.  During translocation organic solutes enter from the mesophyll cells into sieve tubes; with the entry of food material high DPD gradient develops.  As a result of this, water from the surrounding xylem cells enters into sieve tube cells, thus causing high degree of hydrostatic pressure.  This pressure is the motive force for the movement of food materials enmass towards the least concentration region.  This mass or pressure flow envisages unidirectional movement of materials

Munch’s mass flow

HYDROPONICS

THANK YOU

End app me 0775025051,email: ftsamw@gmail.com