- Stomatal closure-inducing plant hormone: **Abscisic Acid (ABA)**

- Hormones that can reverse the effect of ABA on plant growth: **Auxins and Cytokinins**

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**Auxins:**
- Auxins are a group of plant hormones that promote cell elongation and growth.
- They counteract the effects of ABA by stimulating cell division and elongation, leading to overall plant growth.
- Auxins are primarily produced in the apical meristem of the plant and are involved in various growth processes such as phototropism and gravitropism.

**Cytokinins:**
- Cytokinins are plant hormones that promote cell division and delay senescence.
- They antagonize the effects of ABA by promoting cell division, which can counteract the stomatal closure induced by ABA.
- Cytokinins are essential for regulating plant growth and development, particularly in processes such as shoot and root growth.

In conclusion, auxins and cytokinins play crucial roles in counteracting the stomatal closure induced by ABA in plants. By promoting cell division and elongation, these hormones help to maintain overall plant growth and development despite the presence of ABA.

It is abscisic acid which causes stomatal closure...