Emergence and share of information through communication-performance of plants in group formation

In a group communication, there is few researches conducted on a real-time measurement on a relationship between individuals and a relationship between an individual and a group to which the individual belongs, although these relationships are extremely important because they might provide basic knowledge on the mechanism of the co-creation. This paper discusses two topics relevant to the communication among plants; rhythmic motions of radicals in a group and the emergence process of clusters in trees in a natural forest. An investigation on a communication among plants which doesn't possess a brain nor a nerve system would provide a clue to examine a mechanism of a vital contact or communication between human and plants.