Mnemonic 1: Five PGRs — "AGCEA"

"All Gardeners Can Enjoy Apples"

• Auxins → Apical dominance
• Gibberellins → Growth $\frac{elongation}{bolting}$
• Cytokinins → Cell division
• Ethylene → Eats (ripening) = only gas
• ABA → Anxiety (stress hormone)

Mnemonic 2: Promoters vs Inhibitors

"AGC promote, ABA inhibits, Ethylene does both"

• A, G, C = growth PROMOTERS
• ABA = growth INHIBITOR
• Ethylene = BOTH (promotes ripening, inhibits elongation)

Mnemonic 3: Chemical Natures — "I-T-A-G-T"

"Indian Tigers Always Greet Tigers"

• I = Indole (Auxin)
• T = Terpenoid (Gibberellin)
• A = Adenine derivative (Cytokinin)
• G = Gas (Ethylene)
• T = Terpenoid (ABA) Note: Both GA and ABA are terpenoids!

Mnemonic 4: SDP Examples — "CRiTXS"

"Chrysanthemum Runs Into The X-treme Sun"

• Chrysanthemum
• Rice
• Tobacco
• Xanthium
• Soybean

Mnemonic 5: LDP Examples — "WRSH"

"Wheat Radishes Spin into Henbane"

• Wheat
• Radish
• Spinach
• Henbane (Hyoscyamus)

Mnemonic 6: DNP Examples — "TCS"

"TCS doesn't care about light"

• Tomato
• Cucumber
• Sunflower

Mnemonic 7: Sigmoid Curve — "LLS" = "Learn, Leap, Stop"

• Lag = $\frac{Learn}{Prepare}$ (slow start)
• Log = Leap (exponential growth)
• Stationary = Stop (plateau)

Mnemonic 8: Differentiation Types — "DDR" (Like the dance game!)

• Differentiation → specialization (meristem → permanent)
• Dedifferentiation → back to meristem (parenchyma → cambium)
• Redifferentiation → specialize again (cambium → secondary xylem)

Mnemonic 9: ABA Functions — "STAMP"

• Stomatal closure (drought)
• Transpiration reduction
• Antagonizes GA (dormancy)
• Maintains seed dormancy
• Promotes senescence