Dr Natasha de Vere jetted off to Asia to speak at a three-day international symposium on climate change, conservation and urbanism hosted by the government in Seoul.
The head of conservation and research at National Botanic Garden of Wales said conservation work in Carmarthenshire held centre stage at the event.
"More than a third of all plant species are under threat from extinction," she said. "Botanic gardens have an important role - our collections are ambassadors.
"They highlight threats in the wild. We concentrate on plants from the Mediterranean region, temperate woodland ecosystems and Welsh native species."
She added: "The biodiversity of Wales is among the best documented in the world and, with these data, we can use Wales as a nationwide laboratory."