Researchers at Oak Ridge National Laboratory have made a groundbreaking discovery by identifying a gene “hotspot” within poplar trees that triggers a substantial increase in root growth. This finding holds significant promise for the development of improved bioenergy crops and plants that can thrive in challenging conditions while efficiently storing more carbon underground.
The research team harnessed a vast dataset associated with poplar trees to pinpoint regulatory genes capable of activating hundreds of other genes within the tree. The molecular function of one pivotal gene, PtrXB38, was confirmed during their investigation. Poplar plants carrying this gene exhibited prolific and deeper root growth, including the unexpected stimulation of aerial roots on stems and leaves.
The results of this research have been published in the journal New Phytologist.
Wellington Muchero from Oak Ridge National Laboratory highlights the profound implications of these findings, noting that “With more roots, these plants absorb more nutrients, grow larger, are more tolerant to drought, and can draw more carbon underground for longer-term storage.” Furthermore, the discovery of aerial roots may enhance the plant’s resilience to flooding. This naturally occurring gene has the potential to impact various domains, including biomass production, food production, and efforts to mitigate climate change.
The identification of this gene “hotspot” in poplar trees opens up new avenues for optimizing plant growth and carbon sequestration, offering valuable insights into addressing some of the most pressing challenges in agriculture and environmental sustainability.