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Researchers in Malaysia have discovered a tiny and distinctive plant that steals its nutrients from underground fungi.
Published as a new species in the open-access journal PhytoKeys, Thismia malayana belongs to a group of plants known as mycoheterotrophs. Unlike most plants, mycoheterotrophs do not perform photosynthesis. Instead, they act as a parasite, stealing carbon resources from the fungi on their roots.
The 2 cm-long plant’s unusual adaptation takes advantage of the mycorrhizal symbiosis, which is usually a mutually beneficial relationship between colonising fungi and a plant’s root system.
By stealing nutrients from fungi, it can thrive in the low-light conditions of dense forest understories where its highly specialised flowers are pollinated by fungus gnats and other small insects.
A team of botanists from the Forest Research Institute Malaysia (FRIM) collaborated with local naturalists and stakeholders to make the discovery in the tropical rainforests of Peninsular Malaysia. It was there they found the miniscule species hidden amongst leaf litter and growing near tree roots and old rotten logs.
The research team identified Thismia malayana in two locations: the lowlands of Gunung Angsi Forest Reserve in Negeri Sembilan and the hilly dipterocarp forests of Gunung Benom in the Tengku Hassanal Wildlife Reserve, Pahang.
Despite its small size, Thismia malayana is very sensitive to environmental changes and has been classified as Vulnerable according to the IUCN Red List criteria. Its limited distribution and the potential threat from trampling due to its proximity to hiking trails underscore the importance of continued conservation efforts.
Original source
Siti-Munirah MY, Hardy-Adrian C, Mohamad-Shafiq S, Irwan-Syah Z, Hamidi AH (2024) Thismia malayana (Thismiaceae), a new mycoheterotrophic species from Peninsular Malaysia. PhytoKeys 242: 229-239. https://doi.org/10.3897/phytokeys.242.120967
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