For ethylene, cytokinin, ABA, GA, and auxin
1) Identify where the hormone is made
2) Figure out what the receptor is
3) Explain how the hormone-receptor interaction regulates gene transcription
4) Compare the 5 hormone systems - how are they similar?
1) Ans-
Ethylene is produced in leaves, stems, roots, flowers, fruits, tubers, and seeds.
Cytokinin is produced in the root apical meristems.
Abscisic acid is produced in the roots and the terminal buds at the top of the plant.
GA is produced in the plant cell's plastids.
Auxin is produced in the stem, buds, and root tips.
2) Ans-
ETR1 is a receptor for ethylene.
CRE1 or AHK4 is a receptor for cytokinin
PYR1 is a receptor of abscisic acid
GID1 is a receptor for GA.
The F-box protein TIR1 is a receptor of auxin
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