
© ROBERT SPENGLER
A wild barley grain with a zoomed in image of the base of the rachis. In this wild form, the rachis cleanly snaps off of the ear of barley when it is ripe. In the domesticated form, the rachis has to be forcibly pulled off of the ear causing a jagged break.
We think we're so clever, but perhaps we underestimate plants.
Edible flora have long evolved ways to move seeds away from their parents to survive and thrive - and humans are just another part of their grand plan, argues Robert Spengler from the Max Planck Institute in Germany.
"Note that if the apple does not fall far from the tree, then the apple seedlings will be overshadowed by the parent tree and not survive," he says.
"Therefore, the apple tree put extensive amounts of energy into producing high-sugar fruits in order to entice animals to spread the seeds."
This included the earliest hominids, long before humans started consciously domesticating plants through breeding, Spengler
writes in the journal
Trends in Plant Science.
A largely theoretical paper, it was inspired by early scholars of evolution such as Darwin and Humboldt - and many of his ideas came to fruition while sitting across from the Schiller Garden House in Jena, where Humboldt famously spend his summers debating similar concepts before conceiving of the cosmos.
"I think the domestication of plants and animals is one of the most important factors in the demographic shifts and cultural changes that have led humanity into the modern world," he says.
"Therefore, a solid understanding of how this process occurred is essential when studying humanity."
The manuscript draws from paleontological data to highlight parallels between the evolution of seed-dispersal traits in the wild and domestication traits in the fields of early farmers who started intentionally breeding them.
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