GCSE Biology Roots and Shoots Exploring the action of auxins on the growth of roots and shoots.

Slides:

Advertisements

Similar presentations

Revision quiz – Hormones. 1- What is a hormone? Questions on humans.

Advertisements

Plant Hormones How do we know they exist? Why do the shoots grow up, but the roots grow down?

Hormonal Control of Growth in Plants

Tropic Responses Objectives: *Define geotropism and phototropism **Explain role of auxin in plant growth ***Explain the use of synthetic plant hormones.

KEY CONCEPT Plant hormones guide plant growth and development.

4 Reasons for Pruning -Safety -Health -Aesthetics -Production.

(Or is it physiological)

Plant Tropisms and Hormonal control

Plant Hormones. Can you explain what is happening. Click to reveal the answer. Plant sensitivity The animation shows the growth of a young shoot towards.

PHOTOTROPISMGRAVITROPISM  When plants grow towards the light  Tendency of roots to grow in the direction of gravity.

How do plants respond to their environment? Plants can’t move or see! Plants respond to stimuli Physical factors ? Chemical factors.

Chapter 26 Opener. Figure 26.1 Patterns of Early Shoot Development.

Chapter 39: Plant Responses to Internal and External Signals Ms. Klinkhachorn April 26, 2011 AP Biology.

Objectives – What you will need to know from this section   Study auxin as an example of a plant growth regulator under the headings of : H AUXINS.

Nerve Impulses When nerves are resting, the inside of the nerve cell is negative, compared to the outside of the nerve cell When a nerve cell is transporting.

Tropisms and Growth Accelerated Biology.

What is phototropism and how does it help plants survive?

Plant Hormones.

Most axons of the nervous system are surrounded by a myelin sheath (myelinated axons) The presence of myelin speeds up the transmission of action potentials.

Aim: How do plants respond to changes in the environment?

Movement Mechanisms and Roles. Movement in Plants and Animals Syllabus Objectives  Use examples to distinguish between growth movement in plants and.

Plant growth and distribution Grade B – Discuss the factors affecting the growth and distribution of plants, including: nutrients; light; temperature;

Chapter 25 Hormones and Plant Responses. Plant Growth Unlike animals, plant have no true pattern of growth - no pre-determined number of branches and.

Unscramble the following. Essential idea Understand how plants adapt their growth to environmental conditions. Outcomes (3) Describe the growth and response.

Topic 9 : Plant Science Topic 9.1 Plant Structure and Gowth.

Hormone Function and Tropisms

Plant Hormones. Stimulus A change in organism’s environment.

Hormonal regulation in plants Plants do not have a nervous system or endocrine system However they do produce hormones These hormones are produced by.

Connect! Do plants react to their environment? How? Give 2 examples. Give two examples of animals reacting to their environments. What is the process of.

Tropisms. Plants cannot move from place to place. Usually they are held in position firmly by their roots. They can, however, orientate their stems and.

P LANT R ESPONSES How plants move and communicate.

7.1 Hormones.  A chemical substance  Produced in an endocrine gland  Carried in the blood  Alters the activity of the target organ(s)  Destroyed.

7.2 Tropic responses.  Plants grow towards or away from stimuli  The growth response is called a tropism gravity light Shoots will grow towards light.

13.6 Control of Plant Growth and Development Pages

Plant hormones. Hormones from Gr. to excite natural chemical messengers transported to target cells minute concentrations = substantial change growth.

SI session Growth Regulators Topic 27, 28 Spring 2010

Growth in plants Topic 9.3.

GCSE Biology Plant hormones called auxins are produced at the tips of roots and shoots. They are then distributed on the underside if gravity or light.

Tropisms and Photosynthesis. Tropisms Tropism is the growth of a plant towards or away from a stimulus A Stimulus is something that causes change like.

Plant Hormones Auxin Promotes plant growth

Hormones and the Control of Plant Growth

KEY CONCEPT Plant hormones guide plant growth and development.

Plant Hormones.

Plant hormones B: Auxin

B2: Green Plants as Organisms

Plant Tropisms A plant’s response to a stimulus is called a tropism.

Effect of hormones on plant growth

Control systems in plants

Plant hormones.

How plant hormones affect growth.

Phototropism and Gravitropism!

Plant Responses and Hormones

PLANT TROPISMS. PLANT TROPISMS TROPISM A Reaction in plants due to a stimulus What are some ways plants react?

Tropisms and Photosynthesis

Biology Plant Responses.

9.3 Growth in Plants.

Tropisms and Photosynthesis

Roots and Shoots Lesson Element.

KEY CONCEPT Plant hormones guide plant growth and development.

Science 7—Chapter 8 Plant Processes an Reproduction

Plant Responses How plants move and communicate.

Science Vocabulary Week 7-8.

Growth response of plants

Growth response of plants

KEY CONCEPT Plant hormones guide plant growth and development.

To stay healthy, plants need a supply of nutrients from the soil

Notes: Plant Response and Hormones

Required Practical 8: Define: Phototropism: Geotropism:

Ch 13-3: Plant Development and Responses

Presentation transcript:

GCSE Biology Roots and Shoots Exploring the action of auxins on the growth of roots and shoots.

GCSE Biology Plant hormones called auxins are produced at the tips of roots and shoots. They are then distributed on the underside if gravity or light are acting upon them. In the shoots auxins stimulate growth. In the roots auxins inhibit growth.

GCSE Biology In each of the following scenarios you need to complete the following: Decide on the behaviour of auxins (plant hormones that stimulate or inhibit growth). Place the hormones in the correct location on the shoot or root. Draw what you would think the outcome would be in each case.

GCSE Biology Plant shoot

GCSE Biology Gravity Plant root

GCSE Biology Plant shoot Gravity

GCSE Biology Answers

GCSE Biology Build up of auxins. Resulting change in growth direction.

GCSE Biology Gravity Build up of auxins. Resulting change in growth direction.

GCSE Biology Build up of auxins. Resulting change in growth direction. Gravity