Plant growth regulators (PGRs) can play a crucial role in regulating various physiological processes in plants, including growth, development, and stress responses. While not all PGRs are supplied in micronized form, some may be micronized to improve their dispersibility, solubility, and effectiveness. Here are some common plant growth regulators that may be supplied in micronized form:

Auxins Indole-3-acetic acid (IAA)Cell elongation Root initiation Fruit growthRooting powders Hormone treatment
Cytokinins 6-Benzylaminopurine (6-BAP)Cell division Shoot initiation Chloroplast growthTissue culture media Foliar spray
Gibberellins Gibberellic acid (GA3)Stem elongation fruit development Seed germinationSeed treatment Foliar spray  
Abscisic Acid (ABA)  Stops seed germination Stomatal closure Drought toleranceMicronized ABA formulations may be used to regulate seed dormancy or induce stress responses in plants
Brassinosteroids Brassinolide (BR)Cell elongation, Stress tolerance FloweringFoliar sprays Seed treatment
Jasmonates Methyl jasmonate (MeJA)Defence responses Wound healing Metabolite production.Micronized jasmonates may be used to stimulate plant defences against pests and pathogens or to enhance the production of phytochemicals in crops

These are some examples of plant growth regulators that may be supplied in micronized form for specific applications. Micronization can enhance the dispersibility, solubility, and effectiveness of PGRs, leading to improved plant responses and overall growth and development. However, the availability of micronized formulations may vary depending on factors such as regulatory approval, market demand, and application requirements.