In a finding that completely bucks conventional thinking, scientists have discovered the female sex hormone progesterone in a walnut tree. Despite the small differences in chemical structures and large differences in physiological function of steroids, it was believed that only animals could produce the hormone. But new discoveries indicate that plants and animals are more closely related than previously thought.
Occurrence of Progesterone and Related Animal Steroids in Two Higher Plants
The discovery is reported in the American Chemical Society’s Journal of Natural Products, a monthly publication. “The significance of the unequivocal identification of progesterone cannot be overstated,” the article by Guido F. Pauli and colleagues, states. “While the biological role of progesterone has been extensively studied in mammals, the reason for its presence in plants is less apparent.”
Progesterone is a steroid hormone secreted by the ovaries to prepare the uterus for pregnancy. A synthetic version of progesterone–progestin–is used in birth control pills and other medications.
Configuration of the spirophanthigenins that provided proof of the planar arrangements along the bond pathways
The hormone, like other steroid hormones, might be an ancient bioregulator that evolved billions of years ago before the appearance of modern plants and animals. But this new discovery could definitely change the scientific understanding of progesterone in living things. It’s function is still a mystery.
Scientists previously found progesterone-like substances in plants and speculated of its existence in plants. But researchers had not found the actual hormone until now. They detected the hormone in the leaves of the Common Walnut tree but also identified five new related steroids belonging to the buttercup family.
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Source: ACS.org
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Does this mean there are female trees in the environment? wow, that’s a surprise. LOL. the only ones I know with female cells are flowers. But this is a great news to hear. LOL
Perhaps this explains the lack of growth in my front yard where there grows a very large black walnut tree. Plants die or are very stunted in my yard. I had heard that the walnut tree has a toxic substance emitting from the roots and few plants will grow in the same yard.
If it’s progesterone and if that is what is used in birth control pills, it makes sense. I wonder what effect the hormone is having on all the women who take those pills? Toxic substance? Ugh. I could cut down the tree but it’s quite lovely and a good landmark for giving directions.