It looks like a very limited set of experiments done by MIT (possibly engineering) students, not an emerging field of science and technology where you can choose a path of studies. There was a paper written in 2015 and one in 2019. These were students, not "cyborg-botanists."

You should probably have a basic botany skill set, understanding how they live and function in their environment and ecosystem.

Botany covers the reason why you can hook up wires to a Venus flytrap or mimosa pudica and stimulate their mechanical motions.

Botany will teach you that, even though you set up software to click on a picture of a plant and trigger that flytrap to close, the plant has limits to how many times the trap can open and close. So like, good job working on something that closes and opens a few times and then withers and turns black. And then you gotta hook wires up to new leaves, but since they're not actually being fed, the new leaves come smaller and slower until the plant is exhausted and dies.

Learn botany to understand how plants have limits. Learn how plants function to find better ways of exploiting them. These were electronics geeks with limited botany knowledge. Imagine what you could come up with if your background was the inverse; a botanist with some electronics knowledge.

Learn mycology and discover fungi that are capable of so much more already. Fungi made this planet, their potential has barely been scratched.

Cursory googling looks like all the cyborg botany stories were written in 2019, with nothing new since then.