What Is Plant-Thinking?: Botany’s Copernican Revolution

The intelligence of plants is not merely a shadow of human knowing, and their behavior is not a rudimentary form of human conduct. After all, unlike animal and humans, for whom behavior is most often associated with physical movement, plants behave by changing their states, both morphologically and physiologically. An honest approach to the capacities of plants thus requires a simultaneous acknowledgement of the similarities and differences between them and other living beings. In scientific circles, there is certainly no consensus on the implications of new research data drawn from the behavior of plant cells, tissues, and communities. On the one hand, the opponents of the Copernican Revolution in botany claim that the data do nothing but exemplify what has been known all along about plant plasticity and adaptability. This is the position expressed in the open letter to the journal Trends in Plant Science, signed in 2007 by 36 plant scientists who deemed the extrapolations of plant neurobiology “questionable.” On the other hand, we have the investigations of kin recognition in plants by Richard Karban and Kaori Shiojiri; of plant intelligence by Anthony Trewavas; of plant bioacoustics by Stefano Mancuso and Monica Gagliano; of the sensitivity of root apices as brain-like “command centers” by František Baluška and Dieter Volkmann; of plant learning and communication by Ariel Novoplansky; and of plant senses by Daniel Chamowitz, among many others. Their peer-reviewed research findings no longer fit within the scientific framework where plants are studied as objects, rather than living organisms. Leaving aside the provocative analogies they suggest between plants and animals, doesn’t the drastic change in approach (from plants as objects to plants as subjects) amount to a veritable Copernican Revolution, or Kuhnian paradigm shift, in botany?

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