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  1. Naked Science Forum
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  4. Can a plant recognize someone looking into his direction?
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Can a plant recognize someone looking into his direction?

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Offline Kryptid

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Re: Can a plant recognize someone looking into his direction?
« Reply #20 on: 24/06/2018 17:50:36 »
Quote from: tkadm30 on 23/06/2018 23:51:43
Anyways, what is really interesting me in plant vision is how they could actually have real visual memory like humans.

How? They can't see. At the very most, they can only detect the different between light and dark.
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Offline smart (OP)

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Re: Can a plant recognize someone looking into his direction?
« Reply #21 on: 25/06/2018 08:18:15 »
Quote from: Kryptid on 24/06/2018 17:50:36
How? They can't see. At the very most, they can only detect the different between light and dark.

Not true bro. You should really try to do some research before always refuting my claims...  :)

https://www.scientificamerican.com/article/veggies-with-vision-do-plants-see-the-world-around-them/

Just saying...

tk
« Last Edit: 25/06/2018 08:21:18 by smart »
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Offline smart (OP)

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Re: Can a plant recognize someone looking into his direction?
« Reply #22 on: 25/06/2018 11:22:01 »
Quote from: evan_au on 24/06/2018 00:20:59
Microtubules are universal across all the kingdoms of life on Earth, carrying out essential functions in the cell such as:
- Skeleton: Maintain the shape of the cell
- Muscles: The basis of cell movement
- Circulatory system: Moves nutrients around inside the cell
- Reproduction: Microtubules guide chromosome division

Two items missing from this extensive list is "vision" and "cognition".
- At the cellular level, cognition means detecting external stimuli (chemical, electrical, optical, etc), and responding to them (chemical, electrical, movement, etc). The cognitive aspects are managed by triggering gene expression in the nucleus. This then triggers changes in the cell, which may include lengthening or shortening microtubules.
- Light detection is managed by chloroplasts in plants, and specialist rod/cone cells in mammals. But image detection requires the coordination of light detection across many cells, which is handled in a central brain in animals, but appears to have no central coordination in plants - it is a distributed system.
See: https://en.wikipedia.org/wiki/Microtubule#Intracellular_organization

Yo @evan_au

I have thought about your comment for a while and I came to the conclusion that it is quite likely that this Wikipedia article could be seriously outdated!!

tk

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Offline Kryptid

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Re: Can a plant recognize someone looking into his direction?
« Reply #23 on: 25/06/2018 18:38:33 »
Quote from: tkadm30 on 25/06/2018 08:18:15
Not true bro. You should really try to do some research before always refuting my claims...  :)

https://www.scientificamerican.com/article/veggies-with-vision-do-plants-see-the-world-around-them/

Just saying...

tk

Nowhere in that article does it say that any plant has been demonstrated to have the ability to resolve images. It speaks of eyespots, but those are the kinds of things that tell light from dark (like I said before). Even the climbing wood vine they mentioned isn't very good evidence. They would need to rule out chemical signals or other stimuli before they can say with any conviction that it can "see" its host plant well enough to copy its appearance.
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