Phytohormones list along with their precursors and bioassays?

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Phytohormones



1. Auxin

Precursor - Tryptophan (amino acid)

Bioassays - Avena curvature test, root growth inhibition test



2. Gibberellins

Precursor - Acetyl Co-A



Bioassays - Dwarf maize test, dwarf pea test, induction of alpha amylase in barley endosperm test



3. Cytokinins

Precursor - Modified purines derived from tRNA like zeatin (benzyl amino purine), dihydrozeation, isopentyl adenine



Bioassays - Chlorophyll preservation test, tobacco pith culture test, cell division test, expansion of excised radish cotyledon test



4. Ethylene

Precursor - Methionine (amino acid)

Bioassays - Triple response test



5. ABA (Abscisic acid)

Precursor - Violaxanthin

Bioassay - Cotton or Bean explant test



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