New research shows fungus can strengthen NZ bioeconomy

New Bioeconomy Science Institute research shows a fungus discovered in 2020 can process wood and agricultural waste more effectively than traditional commercial enzymes – helping transition forestry into a high-value manufacturing sector.

The fungus, Penicillium rotoruae, was discovered as a new species growing on radiata pine in the timber graveyard at Scion – now part of the Bioeconomy Science Institute – and named after Rotorua. By producing natural enzymes that can easily break down the complex sugars in softwood, it will efficiently transform low-value wood waste into fermentable sugars.

Project leader, Dr Alankar Vaidya, says it will help produce sustainable green fuels, chemicals, biomaterials and bioproducts that will strengthen New Zealand’s circular bioeconomy while cutting reliance on fossil resources.

“This will support forest-based economies and bioindustrial clusters by adding value to existing resources, which could enhance regional sustainability. It will also disrupt the industrial biorefining market, which relies on expensive commercial enzyme cocktails to process wood and agricultural waste.

“Softwood such as radiata pine is a major renewable resource but notoriously difficult to process due to resistant cell wall structures. This breakthrough will speed up and enhance the productivity of enzymatic hydrolysis* – traditionally a bottleneck in biorefinery processing – to make wood conversion cleaner and cheaper.

“Natural enzyme blends from the new fungus can replace or complement costly commercial enzyme formulations, reducing feedstock conversion costs.

Faster and more complete hydrolysis of softwood translates directly to increased yields of fermentable sugars – which are critical inputs for bioethanol, bioplastics and bio-based chemicals,” Alankar says.

In New Zealand, wood (biomass) from planted radiata pine forests is the one renewable feedstock available in large enough quantities to compete with fossil resources. Using current processes, more than half of the softwood biomass is degraded into low-value material under harsh conditions. New Zealand needs a nature-based approach to make the most efficient use of available softwood biomass – to reduce waste. This innovative study shows how natural enzyme systems can pave the way towards a more sustainable, circular bioeconomy in New Zealand and globally.

“This study will be really helpful as a long-term cross-disciplinarity example for researchers across the Bioeconomy Science Institute, as well as other institutions in New Zealand and overseas,” Alankar says.

“It presents valuable intellectual property potential for biotechnology companies, aligning with New Zealand’s strategy to monetise indigenous biological assets in sustainable innovation.”

Penicillium rotoruae is the first fungi in Rotorua that’s been publicly named after the city.

*Enzymatic hydrolysis is a biochemical process where enzymes use a catalyst to break down large molecules into smaller ones, such as proteins into amino acids.

Source & image credit: BSI | Scion Group