Please enable JavaScript.
Coggle requires JavaScript to display documents.
Development and morphogenesis (Environmental Complexity (Water (Scarcity…
Development and morphogenesis
Environmental Complexity
Touch
Venus' flytrap, closes after a sensitive touch
Tendril touches an object and make that a support
Temperature
Determines metabolism
Predict Dormancy period
Gravity
Reliable guide to orient roots and shoots
Support weight of the fruits
Water
Scarcity of water produce abscisic acid
severe scarcity cause abscission of leaves
Absolute Prerequisite
light
Gives direction, the gradient of light
Predict Length of day
Provide energy for photosynthesis
pests and damage
Detector protein provides signals about the damage in leaves and stem
Pattern recognition receptor protein detect fungal and bacterial attack
Responding to environmental stimuli
Morphogenic responses
Photomorphogenic
Gravimorphogenic
Causes a change in quality of plant
Thigmo-morphogenic
Taxis
Cell swim towards positive taxis and away from negative taxis
Nastic responses
Movement based on turgor pressure
Photonastic
Tropic responses
Phototropic
#
Plagiotropism
Thigmotropism
Chemotropism
Geotropism
Communication within the plants
Chemical Messengers
Cytokinins
Cell division
gibberellins
Auxins
#
#
Abscisic acid
#
Ethylene
Signal Amplification Cascades
Multi stage amplification
Use of two or more electron tubes
Perception and transduction
Activation and inhibition of shoots by Auxin
#
Apical Dominance
Growth of lateral bud
Differentiation of vascular tissue
Xylem
Phloem
Cell Elongation
Permanent increase in surface of cell wall
Hormones as signals of environmental factors
Leaf Abscission
Helps to minimize water loss in winter
Carbon monoxide gas is responsible after abscisic acid and ethylene
Tropisms
Interaction of hormones in shoot
Flowering
Photoperiodic introduction
Endogenous rhythms and flowering
ABC model of organization
3 classes of gene to regulate floral organ development
Organ oriented for sexual reproduction
Ripeness to flower
Examples
Oriented to stimulus
Not oriented to stimulus
