The molecular structure of plant sporopollenin.

Abstract in brief

• The text explains that sporopollenin is a highly chemically stable biopolymer found on the outer walls of plant spores and pollen, crucial for protecting plant gametes from environmental damage and enabling plants to live on land.
• Using advanced chemical analysis methods, researchers revealed that pine sporopollenin mainly consists of aliphatic polyketide-derived polyvinyl alcohol units connected by a unique dioxane structure, and also contains minor amounts of naringenin.
• This discovery clarifies the long-standing mystery about the chemical structure of sporopollenin, paving the way for future studies on its biosynthesis and the development of new biomimetic materials with similar inert qualities.