This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: Chocolate lovers may not realize it, but the future of one of the world's most popular foods is increasingly under pressure. Diseases, shifting weather patterns and other environmental stressors are threatening cacao production globally, contributing to supply concerns and economic challenges for the millions of farmers who grow the crop that makes chocolate possible.
Now, after decades of research, Penn State scientists have developed a new disease-tolerant variety of cacao—and they say it has the potential to change the chocolate industry. The new cacao variety builds on decades of research led by Mark Guiltinan, J. Franklin Styer Professor of Horticultural Botany and professor of plant molecular biology in the Department of Plant Sciences at Penn State's College of Agricultural Sciences, and Siela Maximova, research professor of plant biotechnology in the same department.
"For consumers, chocolate is something they expect to find on store shelves every day, but behind that product is a crop and industry facing significant challenges," Guiltinan said. "Our goal is to develop tools that help growers continue producing cacao sustainably and profitably." Penn State's Program in the Molecular Biology of Cocoa, which Guiltinan and Maximova co-direct, traces its roots to the 1980s. Since then, researchers at the university have developed foundational tools for cacao biotechnology, mapped important genetic pathways and built one of the world's leading cacao research programs.
The university recently entered into a licensing agreement with AgroNetica, a cacao-focused biotechnology company, to work toward bringing the plant to growers worldwide. The company will advance field testing of the plants with the goal of eventually marketing the plant directly to growers, helping address some of the most significant threats facing global chocolate production. The AgroNetica agreement represents a new chapter in the university's effort to understand and improve cacao, Maximova said, one focused on translating discoveries into technologies that can help growers, strengthen supply chains and support the future of chocolate production.
"Thanks to this long-term investment in research and maintaining a sustained program, we now have an opportunity to begin getting technologies developed here in the lab closer to the hands of farmers," Maximova said. "The focus was always on helping cacao farmers and the industry. We're now at the place where we have a partner whose expertise is moving these discoveries into real-world use." According to Guiltinan, this new commercialization opportunity is particularly important as cacao production worldwide faces mounting threats from disease, climate variability and changing environmental conditions that jeopardize both grower livelihoods and supply chains.
Black pod disease, an especially destructive disease caused by a mold-like pathogen, alone is estimated to cause yield losses of roughly 30% worldwide, he said, while climate-related stresses continue to threaten production in major cacao-growing regions. Native to the Amazon rainforest, cacao evolved as an understory tree growing beneath a tropical forest canopy. Today, it is cultivated across tropical regions in Africa, Asia and Latin America, often under environmental conditions that are very different from those in which the species evolved.
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