Which of the following physiological activity is not induced by Auxins in plants

Explanation

1) Gibberellins delay senescence. Thus fruits can be left on the tree longer so as to extend the market period.
2) Spraying of Gibberellins on sugarcane crop, increases the length of the stem, thus increasing the yield as much as 20 tonns per acre.
3) GA hastens the maturity period of conifers thus leading to early seed production.
4) GA also promotes bolting in cabbages, beet etc.,
5) They also produce parthenocarpic fruits in grapes and tomato.
6) Gibberellins favour the formation of male flowers in cucurbita.