The plants were always there. We just did not know they could feel us looking.
MANDI, June 29 (THE CONNECT): Does anaesthesia act in organisms without a brain or nervous system the same way it does in animals? It is a question few scientists dared to ask. Researchers at the Indian Institute of Technology (IIT) Mandi have now answered it with findings that could rewrite textbooks on consciousness.
In a landmark series of studies published in the international journals Advanced Biology and Chemical & Biomedical Imaging, the researchers discovered that plant cells respond to anaesthesia through an astonishingly organised and synchronised process. Even without neurons or a brain, plant cells shut down their internal machinery in a precise sequence before recovering in reverse order — behaviour scientists say resembles an integrated biological response rather than a simple chemical reaction.
The findings challenge one of biology’s deepest assumptions: that complex, coordinated responses to anaesthesia are exclusive to organisms with nervous systems. Instead, they suggest that the cellular foundations of consciousness may extend far beyond the animal kingdom.
Led by IIT Mandi Director Prof. Laxmidhar Behera and Prof. Chayan Kanti Nandi, the research used state-of-the-art live-cell microscopy to observe tomato (Solanum lycopersicum) and brinjal (Solanum melongena) plants. The team focused on the root apex — regarded as the plant’s sensory and decision-making centre — where cells continuously process environmental information and direct growth.
Their first study identified what the researchers call a “hierarchical cascade of organellar silencing”. Under anaesthesia, mitochondria, lysosomes, transport vesicles, chloroplasts and finally the nucleus shut down in a precise sequence. When the anaesthetic was removed, the process unfolded in reverse, with the nucleus acting as the master controller that restored normal cellular activity.
The second study revealed an even more surprising phenomenon. Under normal conditions, nuclei inside plant cells move independently. Under anaesthesia, however, they became synchronised across cells while genetically active euchromatin simultaneously migrated to the nuclear periphery. The inactive heterochromatin remained unchanged.
The researchers say this coordinated nuclear behaviour points to an unexpected form of cell-to-cell communication operating in organisms that lack a nervous system. They propose that chromatin reorganisation could become a universal biomarker of the anaesthetised state across both neuronal and non-neuronal life forms.
The implications stretch well beyond plant biology. If similar cellular signatures are found in other species, the research could transform scientific understanding of how consciousness emerges and how living organisms respond to anaesthesia.
The IIT Mandi team has already extended the work to Caenorhabditis elegans (C. elegans), a microscopic roundworm that occupies an evolutionary middle ground between plants and animals. Confirmation of the same nuclear behaviour there would strengthen the case for a universal cellular signature of consciousness.
For now, one thing is becoming increasingly difficult to dismiss: the green world around us may be far more aware than science has ever imagined.
