Chapter 40: Sensory Systems in Plants. Response to Light. Photomorphogenesis is non-directional, light triggered development Light can change the conformation of light-receptor molecules that initiate biological change Red Light Receptors
Chapter 40:Sensory Systemsin Plants
Red Light Receptors
Blue Light Receptors
structurally similar to animal hormones
Effects plant growth and development parallel to auxins and gibberellines
Carbohydrates released from cell walls
Regulates pathogen responses and growth and development in some plants.
stimulates ripening in fruit
ethylene production can increase due to plant stress.
Abscisic Acid -
produced mostly in mature green leaves and in fruits
inhibits the growth of buds and promotes leaf senescence
Helps control opening and closing stomata
Ensures plant survival under water stress