auxins

1.Auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism).

它可影响茎向光性和背地性生长。

2.They work antagonistically with ABSCISIC ACID, and in some situations work cooperativedly with AUXINS as, for example, in the control of sex expression in dioecious plants.

例如，在雌雄异控制性别表达。