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Gnat turns death trap plant into a nursery | National | reformer.com

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Gnat turns death trap plant into a nursery | National | reformer.com

The fungus gnat Leia ishitanii. (NISHIGAKI Hiroki via SWNS)

The flower of Arisaema thunbergii uses a musky odor to lure fungus gnats that usually feed and lay their eggs. (YAMASHITA Hiroaki via SWNS)

The fungus gnat Leia ishitanii. (NISHIGAKI Hiroki via SWNS)

By Isobel Williams via SWNS

A gnat is using a death trap plant as a nursery.

Scientists have discovered in a group of plants famous for luring its pollinators to their deaths is one particular species which offers its flowers as a nursery in exchange.

The famously deceptive plant genus Arisaema is described by the researchers as the only plant that achieves pollination at the expense of the pollinator's life.

It uses a musky odor to lure fungus gnats that usually feed and lay their eggs on mushrooms into their cup-shaped flowers.

The insects can escape from the male flowers, but only after tribulations that will result in them being covered in pollen.

However, there is no escape from the female flowers, and once they enter these, the involuntary pollen carriers struggle to find an exit, which ensures that they will pollinate the flower, but they can't get a hold on the waxy interior and perish.

Researchers at Kobe University in Japan gathered male and female flowers of a particular Arisaema species, A. thunbergii, and looked closely both at what species of insects got trapped and at what happens to the flowers after pollination.

The flower of Arisaema thunbergii uses a musky odor to lure fungus gnats that usually feed and lay their eggs. (YAMASHITA Hiroaki via SWNS)

The findings, published in the journal Plants, People, Planet, show that the main pollinator, a fungus gnat by the name of Leia ishitanii, lays its eggs into the flowers, effectively using the deadly plant as a nursery.

The larvae feed on the decaying flowers, developing into adult fungus gnats that emerge after a few weeks.

They also sometimes found gnats emerge from flowers without any corpses of members of that species. This suggests that at least some of the insects are actually able to escape the trap.

The researchers noted that A. thunbergii might be an example of an unusual evolutionary process from deception to mutualism.

Professor Kenji Suetsugu said: “This finding adds a new dimension to our knowledge of plant-insect interactions, but the most exciting aspect is that even in well-studied fields, there is still much to learn."

He added: "Nature is full of surprises.

“Our study highlights the need to refine existing models of pollination biology beyond the traditional mutualistic or deceptive paradigms, thus contributing to a more nuanced understanding of plant-pollinator dynamics.”

Originally published on talker.news, part of the BLOX Digital Content Exchange.

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Gnat turns death trap plant into a nursery | National | reformer.com

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