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Plants 'Recognize' Their Siblings
An anonymous reader writes to tell us that according to a recent study, Biologists have found that plants are able to recognize their own relatives. "Researchers at McMaster University have found that plants get fiercely competitive when forced to share their pot with strangers of the same species, but they're accommodating when potted with their siblings. [...] Though they lack cognition and memory, the study shows plants are capable of complex social behaviours such as altruism towards relatives, says Dudley. Like humans, the most interesting behaviours occur beneath the surface."
Plants are highly immobile, and food for both both dogs and humans. Don't anthropomorphise species which are not human, especially not within a scientific context like this. It's actually quite likely that plants treat 'sibling' plants as an extension of themselves; it's a highly logical adaptation. Instead of being two separate plants, they are two growths of the same plant, and thus do not compete, as fighting with that which is yourself (read: more or less the same DNA) is futile and does not further propagation of the genetic code. The reason animals fight is due to the vast genetic variation between siblings; also for purposes of entertainment and education. Even twins will fight in species with developed brains, for then memetic influence becomes key on top of genetic influence.
Disclaimer, I have been reading far too much Dawkins, I am not a biologist