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**Summary:**

A recent study by researchers at IISER Pune sheds light on the role of cell geometry in plant tissue regeneration. While stem cells and genetic pathways are known to contribute to regeneration, the study focuses on how cells change shape and size in response to mechanical tension to guide the regrowth of amputated plant root tips. The researchers found that cube-like root cells transform into rhomboid shapes, dividing diagonally to redirect growth and recreate the tapered tip. This highlights the importance of physical cues, particularly cell geometry, in morphogenesis, potentially offering insights applicable to other biological systems.

**News Article:**

**Cell Shape Key to Plant Regeneration, Reveals Indian Study**

**Pune, India – August 23, 2025** – Indian scientists have uncovered a surprising new mechanism behind plant tissue regeneration, highlighting the critical role of cell shape. Researchers at the Indian Institute of Science Education and Research (IISER) Pune have demonstrated that cell geometry, or the size and shape of individual cells, plays a vital role in guiding the regrowth of amputated plant root tips.

The study, published in *Current Biology*, challenges the traditional focus on stem cells and genetic pathways as the sole drivers of regeneration. The research team, led by Mabel Maria Mathew and Kalika Prasad, investigated how plant roots regain their original shape after amputation.

Their findings reveal that ordinary cube-like root cells change their shape into rhomboid shapes and divide diagonally after amputation, which orients future cell growth. These inclined rows of cells finally rebuild the tapered shape of the root. This process is driven by internal mechanical tension within the cells, acting as a “hidden stress” that forces cells to change shape and divide strategically.

“We’ve shown that it’s not just about genes,” explained Mabel Maria Mathew. “The physical shape and behavior of cells are crucial in guiding how tissues rebuild themselves.”

This discovery has significant implications for understanding morphogenesis, the process by which organisms develop their shape and structure. The research suggests that physical cues, like cell geometry, may be a more universal factor in biological systems than previously thought.

“These principles may even hold true across other biological systems, pointing to a more universal role for cell physical cues, in particular cell geometry in shaping life,” says Kalika Prasad.

The findings build on previous research into animal regeneration, such as the regrowth of fingernails from the nail bed or the tail regeneration of lizards, which highlights how more than 300 genes are involved in the response process, and developmental and wound -response pathways are activated to heal the wound and put the tail back.

This research could lead to new approaches in tissue engineering and regenerative medicine, potentially impacting how we understand and treat injuries and diseases in the future.

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