Other effects of auxins
Stimulates formation of fruits pollen contains large amounts of auxin - pollen’s auxin is a
chemical signal that pollination has happened and fruit formation can begin - synthetic auxins can cause fruit formation without pollination. Addition of synthetic auxins to cuttings stimulates formation of
roots in plant cuttings - “rooting hormone”. Auxin inhibits the growth of lateral buds in shoots -
production of auxin by the shoot apex stops growth of neighboring lateral buds - “apical dominance”.
Synthetic auxins can be used to control weedy dicots through the inhibition of growth of shoots - it doesn’t harm monocots - most commonly used synthetic auxin is 2,4D - often used in lawn “weed and feeds”.