Now wonder, research proves that even plants recognise their kins. Researchers from McMaster University have found that plants go competitive when forced to share their own environment like pot, with strangers of the same species, but they’re accommodating when potted with their siblings.
How they do it???
When a different plant of same species is potted with a growing plant they start growing more roots, which allows them to grab water and mineral nutrients before their neighbours get them. when they share a pot with family i.e the sibiling 1st or 2 nd generation they don’t increase their root growth. Because differences between groups of strangers and groups of siblings only occurred when they shared a pot, the root interactions may provide a cue for kin recognition. The following is the paper that is being published on the same.
Dudley, S. A. and A. L. File (2007). Kin recognition in an annual plant. Biology Letters, in press.