A recent study has solved a longstanding mystery in paleontology, revealing how early plants were able to transition from aquatic environments to land through changes in their vascular systems. For many years, scientists have been trying to understand how early land plants were able to adapt to n
has found that a small change in the vascular system of plants made them more resistant to drought, allowing them to thrive in new, drier environments. The team was led by Yale School of the Environment Professor Craig Brodersen and included lead author Martin Bouda and Kyra Prats. The findings have opened up new avenues for exploration in this field.
The cylinder-shaped vascular systems in the earliest land plants, which were similar to a bundle of straws, had initially served them well in their early watery habitats. But as they moved onto land with fewer water resources, the plants had to overcome drought-induced air bubbles. Early land plants did this by reconfiguring the ancestral, cylindrical-shaped xylem into more complex shapes that prevented air bubbles from spreading.
Bouda notes that the makeup of the team of researchers who co-authored the study, which included a paleobotanist, plant physiologists, and a hydrologist, helped provide techniques and perspectives that led them to uncover the reason for the complex vascular structure that had emerged in Devonian-era plants.
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