Salicylic acid (plant hormone)

Here is a list of some of salicylic acid's properties when acting as a plant hormone.

Location, Characteristics and Occasions for Synthesis Induction

\n* Cells returning from water stress\n* Released by cells secure in having more than enough nutrients and environmental conditions locally to survive at its current metabolic level\n* All cells capable of synthesizing\n* Has its effect or acts by rapid local increases followed by rapid decreases in levels

Effects

\n* Retards senescence (regulatory role) – probably by inhibiting Ethylene biosynthesis \n* Induces flowering \n* Inhibits seed germination – by inhibiting ABA synthesis \n* May also block the wound response and act antagonistically to ABA – preventing the wound response from spreading further than necessary\n* After a survival threat has passed SA quickly removes a plant, organ, tissue or cell from a defensive posture and returns it to normal functioning \n* Increases cell metabolism rate to take advantage of new complete more advantageous nutrient and environmental conditions (Not true in Theory II)\n* A climactic or sustained level of SA may occur if a cell has reached its peak metabolic levels and may signal that a plant's resources can be turned to growth (Not true in Theory II of plant hormones)\n* This climactic or sustained level of SA may be a prerequisite for the synthesis of Auxin and/or Cytokinin, because only then does a plant know that it has enough resources to turn them to growing bigger (Not true in Theory II)