Some scientific discoveries with a few excerpts from websites:
Plant Intelligence
What the new botany is suggesting is that plants are sensitive and problem-solving but bypass the need for self-consciousness and brain activity that we assume is necessary for intelligence. People who think this are often accused of being anthropocentric, believing that plants are behaving like humans. The philosopher Daniel Dennett marvelously riposted that critics of this theory are "cerebrocentric," believing intelligent behavior is not possible without the infinitely superior human brain. What the new work shows is that plants, by means we do not yet fully understand, are capable of behaving like intelligent beings. They are capable of storing—and learning from—memories of what happens to them.
http://news.nationalgeographic.com/2016/02/160221-plant-science-botany-evolution-mabey-ngbooktalk/
The Intelligent Plant. That is the title of a recent article in The New Yorker — and new research is showing that plants have astounding abilities to sense and react to the world.
But can a plant be intelligent? Some plant scientists insist they are — since they can sense, learn, remember and even react in ways that would be familiar to humans.
Michael Pollan, author of such books as "The Omnivore's Dilemma" and "The Botany of Desire," wrote the New Yorker piece about the developments in plant science. He says for the longest time, even mentioning the idea that plants could be intelligent was a quick way to being labeled "a whacko." But no more, which might be comforting to people who have long talked to their plants or played music for them.
The new research, he says, is in a field called plant neurobiology — which is something of a misnomer, because even scientists in the field don't argue that plants have neurons or brains.
"They have analagous structures," Pollan explains. "They have ways of taking all the sensory data they gather in their everyday lives ... integrate it and then behave in an appropriate way in response. And they do this without brains, which, in a way, is what's incredible about it, because we automatically assume you need a brain to process information."
And we assume you need ears to hear. But researchers, says Pollan, have played a recording of a caterpillar munching on a leaf to plants — and the plants react. They begin to secrete defensive chemicals — even though the plant isn't really threatened, Pollan says. "It is somehow hearing what is, to it, a terrifying sound of a caterpillar munching on its leaves."
Pollan says plants have all the same senses as humans, and then some. In addition to hearing, taste, for example, they can sense gravity, the presence of water, or even feel that an obstruction is in the way of its roots, before coming into contact with it. Plant roots will shift direction, he says, to avoid obstacles.
So what about pain? Do plants feel? Pollan says they do respond to anesthetics. "You can put a plant out with a human anesthetic. ... And not only that, plants produce their own compounds that are anesthetic to us." But scientists are reluctant to go as far as to say they are responding to pain.
How plants sense and react is still somewhat unknown. They don't have nerve cells like humans, but they do have a system for sending electrical signals and even produce neurotransmitters, like dopamine, serotonin and other chemicals the human brain uses to send signals.
"We don't know why they have them, whether this was just conserved through evolution or if it performs some sort of information processing function. We don't know. There's a lot we don't know," Pollan says.
And chalk up another human-like ability — memory.
http://www.pri.org/stories/2014-01-...may-forever-change-how-you-think-about-plants
Humans have five basic senses. But scientists have discovered that plants have at least 20 different senses used to monitor complex conditions in their environment. According to Mancuso, they have senses that roughly correspond to our five, but also have additional ones that can do such things as measure humidity, detect gravity and sense electromagnetic fields.
Plants are also complex communicators. Today, scientists know that plants communicate in a wide variety of ways. The most well known of these is chemical volatiles – why some plants smell so good and others awful – but scientists have also discovered that plants also communicate via electrical signals and even vibrations.
“Plants are wonderful communicators: they share a lot of information with neighbouring plants or with other organisms such as insects or other animals. The scent of a rose, or something less fascinating as the stench of rotting meat produced by some flowers, is a message for pollinators.”
Many plants will even warn others of their species when danger is near. If attacked by an insect, a plant will send a chemical signal to their fellows as if to say, “hey, I’m being eaten – so prepare your defences.” Researchers have even discovered that plants recognize their close kin, reacting differently to plants from the same parent as those from a different parent.
“In the last several decades science has been showing that plants are endowed with feeling, weave complex social relations and can communicate with themselves and with animals,” write Mancuso and Viola, who also argue that plants show behaviours similar to sleeping and playing.
And it turns out Darwin was likely right all along. Mancuso has found rising evidence that the key to plant intelligence is in the radicle or root apex. Mancuso and colleagues recorded the same signals given off from this part of the plant as those from neurons in the animal brain. One root apex may not be able to do much. But instead of having just one root, most plants have millions of individual roots, each with a single radicle.
So, instead of a single powerful brain, Mancuso argues that plants have a million tiny computing structures that work together in a complex network, which he compares to the Internet. The strength of this evolutionary choice is that it allows a plant to survive even after losing 90% or more of its biomass.
“The main driver of evolution in plants was to survive the massive removal of part of the body,” said Mancuso. “Thus, plants are built of a huge number of basic modules that interact as nodes of a network. Without single organs or centralised functions plants may tolerate predation without losing functionality. Internet was born for the same reason and, inevitably, reached the same solution.”
Having a single brain – just like having a single heart or a pair of lungs – would make plants much easier to kill.
“This is why plants have no brain: not because they are not intelligent, but because they would be vulnerable,” Mancuso said.
In this way, he adds, it may be better to think of a single plant as a colony, rather than an individual. Just as the death of one ant doesn’t mean the demise of the colony, so the destruction of one leaf or one root means the plant still carries on.
The wide gulf
So, why has plant sentience – or if you don’t buy that yet, plant behaviour – been ignored for so long?
Mancuso says this is because plants are so drastically different from us. He says it is “impossible” for us to put ourselves in the place of a plant.
“We are too different; the fruit of two diverse evolutive tracks...plants could be aliens for us,” he said. “But all the same we share with plants life, the same needs, we evolved on the same planet. In the end we respond in the same way to the same impulses.”
https://www.theguardian.com/environ...ligent-sentient-book-brilliant-green-internet