Michele P. Verderane.
The story behind the discovery
During the monsoon, a team of scientists from India and China embarked on a fungal foray in Assam. Over the course of two weeks, they were amazed by the vast diversity of fungi in the region: hundreds of species of fungi were spotted, some of which were new to science.
After hearing reports from locals of “electric mushrooms”, they headed to West Jaintia Hills District in Meghalaya. It was a drizzly night and a local person guided the team to a bamboo forest, which is part of a community forest, and asked them to switch off their torches.
A minute later, the group was awestruck by what they saw: in the midst of the darkness an eerie green glow emerged from dead bamboo sticks that were smothered in tiny mushrooms. The fungus emits its own light – a phenomenon known as bioluminescence.
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One among the world's 97 glowing species
The new species — named Roridomyces phyllostachydis — was first sighted on a wet August night near a stream in Meghalaya’s Mawlynnong in East Khasi Hills district and later at Krang Shuri in West Jaintia Hills district. It is now one among the 97 known species of bioluminescent fungi in the world.
Interestingly, local residents used the glowing bamboo sticks as natural torches to navigate the forest at night. Steve Axford, a fungal photographer who accompanied the team, set up a small studio and took photos.
Upon closer observation, the team noticed that only the stipes (stalks) of the mushroom lit up and they suspected it could be a new species, said Gautam Baruah, who leads the Rural Futures initiative at the Balipara Foundation in Assam and is a co-author of the report. A detailed examination in the laboratory had confirmed their suspicion: it was a new species from the genus Roridomyces—and the first fungus in this genus to be discovered from India.
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This mushroom was only found growing on dead bamboo (Phyllostachys mannii). Special elements could be present in the bamboo substrate that this fungus prefers, said Samantha Karunarathna, senior mycologist at the Chinese Academy of Sciences and lead author of the report She added that more research is needed to understand why they grow on this bamboo species.
Other glowing fungi in India
So far this mushroom is known from Krang Shuri, West Jayantia Hills District and Mawlynnong, East Khasi Hills District in Meghalaya. Only a few species of glowing fungi have been reported from India. Two have been reported from the Western Ghats, one in the Eastern Ghats, and one in the state of Kerala, among others. Glowing fungi have also been spotted in the forests of Maharashtra and Goa (part of the Western Ghats) but they have not been scientifically reported. Karunarathna believes the actual number of bioluminescent fungi in India should be higher.
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A 2015 study showed that bioluminescence in Neonothopanus gardneri, a large, bright mushroom that grows at the base of young palm trees in Brazilian coconut forests, is under the control of a circadian clock. The activity of the enzymes involved in producing light peaks at night and this regulation implies that the lights serve a purpose.
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