Scientists Uncover the Ancient Origins of Baobab Trees in Genetic Study [View all]

[Judi Lynn]

The trees originated in Madagascar 21 million years ago but later traveled long distances by way of ocean currents, according to new research

Aaron Boorstein
Staff Contributor
May 21, 2024



Baobab trees can reach 100 feet tall, and they support entire ecosystems and communities with their large structures and natural resources. Tuul & Bruno Morandi via Getty Images


It’s sometimes called the “Tree of Life” for its supportive qualities and long lifespan stretching thousands of years—and it’s also known as the “Upside-Down Tree” for its root-like branches. But no matter the name, the baobab tree has long captivated the human imagination with its surreal shape and enduring presence.

Eight living species of the baobab genus Adansonia exist worldwide: one in mainland Africa, six in Madagascar and one in northwestern Australia. Yet, the origins of these botanical behemoths have eluded scientists for years.

Many researchers thought the trees began on the African mainland, then spread to the other locations, the New York Times’ Rachel Nuwer reports. However, a study published last week in the journal Nature used the genomes of each baobab species to unravel the tree’s ancient origins, instead tracing its lineage to Madagascar 21 million years ago.

Over the course of millions of years, the team reports, diverse baobab species emerged across Madagascar, driven by ecological competition and environmental conditions—including altitude, sea level and volcanic activity. Eventually, two baobab species traveled from Madagascar to continental Africa and northwestern Australia where they, too, evolved into unique species.

These baobab seeds were likely transported across continents by the Indian Ocean gyre, a system of rotating currents in the Indian Ocean that circulate clockwise.

More:
https://www.smithsonianmag.com/smart-news/scientists-uncover-the-ancient-origins-of-baobab-trees-in-genetic-study-180984384/

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Man with baby baobob