Recently, RTP materials from biomass have captured interest given their favorable sustainability metrics, abundance and cost-effectiveness as well as end of life considerations (biodegradability, compostability) . Until now, wood , lignin , gelatin , hemicellulose , cellulose and natural polyphenols have been successfully used as precursors of RTP materials. Less attention has been paid to whole plant structures containing some of the latter biomacromolecules. For instance, bamboo is an appealing option given its abundance, fast growth rate, strength, structure and composition. However, RTP materials from bamboo are still an incipient area of research, which is the subject of the current investigation related to the "top-down" synthesis of RTP fibers (Fig. ) . Specifically, hemicellulose and lignin were partially removed from bamboo, yielding microfibers that showed roomtemperature phosphorescence.