There isn't a single hormone that can "overcome" genetic dwarfism in plants. It's important to understand that dwarfism in plants is often caused by complex genetic interactions that can involve multiple genes.

However, gibberellins play a crucial role in regulating plant growth and development, including stem elongation. Here's how they relate to dwarfism:

* Gibberellin deficiency: Many dwarf plant varieties are deficient in gibberellin production. This lack of gibberellin leads to shorter stems and stunted growth.

* Gibberellin application: Applying gibberellins to dwarf plants can often stimulate stem elongation and increase height. This is why gibberellins are used in agriculture to increase the size of grapes and other fruits.

Important to note:

* Not all dwarfism is due to gibberellin deficiency. Other factors like genetic mutations affecting cell division or growth regulators can also contribute.

* Gibberellin application might not fully "overcome" dwarfism. It can help increase height, but the overall plant architecture and growth pattern might still be different from a non-dwarf variety.

Therefore, while gibberellins are a key player in regulating plant growth and can help with dwarfism, it's not a simple "cure." Understanding the specific genetic basis of dwarfism in a particular plant is crucial for determining the most effective strategies for managing it.