What are the main natural plant hormones and what are their respective effects?
The main natural plant hormones and their respective functions are the following: Auxins (the best known natural auxin is IAA, indoleacetic acid): their function is to promote plant growth, distension and cellular differentiation. Gibberellins: have action similar to auxins (growth and distension), stimulate flowering and fruit formation and activate seed germination. Cytokinins: increase cellular division rate and together with auxins help growth and tissue differentiation, slow the plant aging. Ethylene (ethene): a gas released by plants that participates in the growth process and has noteworthy role in fruit ripening and in leaf abscission.
