A weird-looking parasitic plant has ditched all photosynthetic machinery but still found a way to thrive.
New Seven Analysis Ophiocephala In some species, these crazy plants were found to have a 10-fold reduction in their plastid genome, or plastid (the part of the cell responsible for photosynthesis).
What’s left, at best 16,000 base pairs, represents a remnant that’s useless for converting sunlight into energy, a process that most plants rely on to survive.
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instead, Ophiocephala It draws inspiration from mushrooms, which bear a strong resemblance to mushrooms, using their roots to absorb nutrients. However, unlike symbiotic mycorrhizal fungi, Ophiocephala Absolutely no reward; it’s downright parasitic.
“Ophiocephala “It lost much of its definition as a plant but retained enough of its parasitic function,” said botanist Petra Svetlikova of the Okinawa Institute of Science and Technology in Japan.
“This is a fascinating example of how something so strange could have evolved from an ancestor that looked like a normal plant, with leaves and a normal root system.”
Ophiocephala It produces flowers and seeds, but it looks and behaves so much like a mushroom that Svetlikova and her colleagues wanted to learn more about its evolution. This similarity is an example of convergent evolution, in which two very different, unrelated species develop very similar traits.
The researchers collected samples of seven species from 12 populations in hard-to-reach habitats in Taiwan and Japan and analyzed their genetic codes.
they found Ophiocephala It has the smallest plastids ever found in land plants, only 14,000 to 16,000 base pairs, while most plants usually have 120,000 to 170,000 base pairs.
Nonetheless, their remaining tiny plastids are still metabolically active, just not photosynthetic. This suggests that these fascinating plants do not possess as many redundant genes as previously thought, but retain sufficient plastid machinery to support basic metabolism in a parasitic lifestyle.
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The researchers also found that in the same ancestor, plastid loss occurred in Ophiocephala Divide into many different species.
Ophiocephala Species isolated on islands subsequently evolved the ability to reproduce asexually. In fact, for some species, it’s now the only way they can reproduce.
This strategy is rare in obligate systems of plants, and the researchers say it may increase the parasite’s chances of establishing new populations on islands, where finding mates or even suitable habitat can be difficult.
Earth is the only world where we know life has emerged. This scarcity demonstrates the fragility of life—yet the tenacity with which organisms adapt and persist is astounding.
“The family Ophiaceae thus serves as a fascinating model for reconstructing the evolutionary changes associated with the loss of photosynthesis in land plants,” the researchers wrote in their paper.
The study was published in new botanist.
