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Development and Morphogenesis (Environment Complexity we (Touch,…
Development and Morphogenesis
Environment Complexity
Touch
Temperature
Gravity
Water
Light
Pests and Damage
Responding to the Environmental Stimuli
Nastic Response
a stereotyped nongrowth response that is not oriented with regard to the stimulus
Morphogenic Response
causes a change in the “quality” of the plant
Tropic Response
growth response oriented with regard to the stimulus
Taxis
s a response in which a cell swims toward (positive taxis) or away from (negative taxis) a stimulus
Communication Within Plants
Chemical Messengers
slow mechanism: transport of hormones through the plant
Signal Amplification Cascades
Perception and Transduction
Activation and Inhibition of Shoot by Auxin
Apical dominance
produced auxin induces dormancy in these axillary buds, the result being that each shoot tip has only one active apical meristem, a phenomenon
Differentiation Of Vascular Tissue
the response is cell division and morphogenesis
Cell Elongation
auxin triggers cell elongation
Hormones as Signals of Environmental Factors
Tropisms
Leaf Abscission
Flowering
Photoperiodic Induction to Flowers
Endogenous Rhythms And Flowering
Ripeness to Flowers
ABC Model of Flower Organization
