Abscisic Acid - Location and Timing of ABA Biosynthesis

Location and Timing of ABA Biosynthesis

  • Released during desiccation of the vegetative tissues and when roots encounter soil compaction.
  • Synthesized in green fruits at the beginning of the winter period
  • Synthesized in maturing seeds, establishing dormancy
  • Mobile within the leaf and can be rapidly translocated from the roots to the leaves by the transpiration stream in the xylem
  • Produced in response to environmental stress, such as heat stress, water stress, salt stress
  • Synthesized in all plant parts, e.g., roots, flowers, leaves and stems

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