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Why have no plants evolved to move from spot

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CockneyRebel
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I wonder if they will in the future.


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Would the advantages of evolving to move outweigh the costs of being able to move?

Life that moves often requires a brain or at least ganglia to be able to process sensory inputs, it also requires an effective means to control movement in order to move. These both increase the amount of energy required by that organism in order to survive.

Plants don't need to move in order to survive, that's what seeds are for. A plant's purpose in life is to produce seeds, not to experience as much as possible.

Plants have evolved for a different lifestyle, how much gain would there be for a species to develop in that direction, vs. just remaining as they are?


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Today, 12:21 am

Fenn wrote:
belijojo wrote:
PS：After searching, I found Selaginella tamariscina, a plant from South America that can "walk". it would die of thirst if it didn't.


Can you point to your source?

I cannot find anything about this plant walking or even being in South America.

I see some trees have stilt-like roots and can grow new roots closer to the sun and better soil while letting old roots die off. If this is too slow to be considered “walking” is disputed. It does put me in mind of Ents.

https://en.wikipedia.org/wiki/Selaginella

Under dry conditions, some species of Selaginella can survive dehydration. In this state, they may roll up into brown balls and be uprooted, but can rehydrate under moist conditions, become green again and resume growth. This phenomenon is known as poikilohydry, and poikilohydric plants such as Selaginella bryopteris are sometimes referred to as resurrection plants.[8]


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