Behaviors Governed by circadian & Circannual rhythm

Slides:

Advertisements

Similar presentations

Biological Rhythms Endogenous: Endogenous: internal body clock Exogenous: Exogenous: controlled by environmental stimuli Most rhythms are endogenous but.

Advertisements

Plant Responses to Signals IV Photomorphogenesis Circadian Rhythms Gravitropism

Light and plant development

Plant Responses to Signals IV Photomorphogenesis Circadian Rhythms Gravitropism

Plant Responses to Signals IV Photomorphogenesis Circadian Rhythms Gravitropism

2.E.2 Regulation Timing and coordination of physiological events are regulated by multiple mechanisms.

Biology, 9th ed, Sylvia Mader

TIMING RESPONSES Continued…. COMPOUND RHYTHMS  The environment changes most on a shoreline because the cycle of day and night occurs as well as the tidal.

(Or is it physiological)

POSSIBLE FUNCTIONS of the CIRCADIAN CLOCK IS IT IMPORTANT AT ALL? YES! POSSIBLE FUNCTIONS DAILY PROGRAMING of PHYSIOLOGY PHOTOPERIODIC REPRODUCTION ANIMAL.

Plant timing responses. Like animals, plants have both exogenous and endogenous factors that control rhythms. Circadian rhythms shown by plants include:

CHAPTER 39 PLANT RESPONSES TO INTERNAL AND EXTERNAL SIGNALS Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings Section C: Plant.

Plant Responses to Signals IV Photomorphogenesis Circadian Rhythms Gravitropism

Growth and development in plants

Chapter 39: Plant Responses to Internal and External Signals Jay Swan Cincinnati, Ohio.

 Plant Responses to Internal and External Signals Chapter 39.

Plant behaviour.

Biological Rhythms Animals. Definitions Biological clock is an internal timing system which continues without external time clues, and controls the time.

Plants. Transport in plants Vascular vessels- – Xylem – water & minerals up to leaves – Phloem – water & food – up & down to parts of plant (products.

Tidal rhythms (periods ~ 12.4 hours) fiddler crab foraging.

Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings PowerPoint ® Lecture Presentations for Biology Eighth Edition Neil Campbell.

Plant Responses to Environmental Stimuli. The Response to Light— The Action Spectrum.

Tropic responses Directional movements by growth in response to a directional stimulus.

Taking Neuroscience into the classroom Community Connection.

 Organisms need a method of sleeping and waking in constant conditions.  Need to be able to predict timing of events like migration and hibernation.

Responses of organisms to abiotic factors (This is an overview. Later we will go into more details with examples of plants and animals)

LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert.

Plant Response to Stimuli Mechanisms plants have to respond to environmental stimuli.

Chapter 39 Plant Responses to External and Internal Signals.

Action spectrum of photosynthesis Fig 39.3 Fig Seedling germination may depend on light.

Lecture #17 Date _______ n Chapter 39 ~ Plant Responses to Internal and External Signals.

Plant Responses to Stimuli

What is photoperiodism and how is it used in flowering ?

TIMING RESPONSES Continued…. COMPOUND RHYTHMS  The environment changes most on a shoreline because the cycle of day and night occurs as well as the tidal.

Sunflower Germination

Biological Rhythms Repeated rhythms in animals which control the body or behaviour and synchronise the organism with the environment.

Plant Response to Stimuli

Humans AND THE DISRUPTION OF CIRCADIAN RHYTHM.

Reproduction and Flowering in Plants

Warm-Up (2/22) Explain how plants obtain energy from sunlight.

Plant Timing Responses

Plants Keep Track of the Hours and the Seasons

Plant Responses to Internal and External Signals

Control systems in plants

The biological measurement of the relative lengths of day and night

Plant Control Systems It’s a Hormonal Thing!.

Chapter 39: Plant Responses to Internal and External Signals

Photoperiodism in Plants

Bonus #2 is due F 3/21.

Plant Form and Function

Plant responses to internal and external signals

Warm-Up Explain how plants obtain energy from sunlight.

Action spectrum of photosynthesis

Daily and Seasonal Timing

Chapter 39 ~ Plant Responses to Internal and External Signals

Plant Responses to Internal and External Signals

Regulation of melatonin production and receptor function.

Circannual Clocks: Annual Timers Unraveled in Sheep

Structure and Function of Plants

Plant responses to Internal and External Stimuli

Circadian Timing of REM Sleep Is Coupled to an Oscillator within the Dorsomedial Suprachiasmatic Nucleus Michael L. Lee, Beryl E. Swanson, Horacio O.

Photoperiodism: The Coincidental Perception of the Season

AP Biology Chapter 39 Plant Responses to Internal and External Signals.

The process in which an embryo sporophyte resumes growth after a period of dormancy is ________. germination budding phototropism senescence

The Phytochrome System

The biological measurement of the relative lengths of day and night

PHOTOPERIODISM Flowering is an important phase in the life cycle of a plant. Transition from vegetative phase to reproductive phase. Physiological mechanism.

Light regulation of Plant Development

Circadian rhythms: Something to cry about?

Chapter 39. Plant Response.

Presentation transcript:

Behaviors Governed by circadian & Circannual rhythm Chapter 39 & 49 Behaviors Governed by circadian & Circannual rhythm

Circadian Rhythm Physiological cycle that displays an endogenous, entrainable oscillation of about 24 hours. © 2011 Pearson Education, Inc.

Suprachiasmatic Nucleus (SCN) © 2011 Pearson Education, Inc.

Deviation From 24-Hour Clock Mouse Actogram Model © 2011 Pearson Education, Inc.

Photoreceptors in Plants Blue-light photoreceptors Stomatal opening Phytochromes Sleep movements Seed germination © 2011 Pearson Education, Inc.

Plant Response to Seasons Photoperiod Relative lengths of night and day Photoperiodism  physiological response Short-day Flower when night > day Long-day Flower when night < day Day-neutral Flowering controlled by plant maturity, not photoperiod © 2011 Pearson Education, Inc.