*4.1. Morphology and Cultivation*

The specimen of *T. odorata* was derived from samples collected from the tree bark of *Fagus longipetiolata* located in the Hainan Tropical Botany Garden (19◦30 49 N, 109◦30 14 E) in December 2013, with the voucher number DZ1317. The specimen was primarily examined under a stereoscope microscope (Zeiss model KL1500 LCD; Carl Zeiss, Göttingen, Germany). Filaments were isolated using forceps and dissecting needles. We selected clean and complete filaments, placed them in culture dishes, and then spread the branches while using a stereoscope. Morphology was observed under differential interference contrast microscopy using a Leica DM5000B microscope (Leica Microsystems, Wetzlar, Germany). Micrographs were captured using a Leica DFC320 digital camera. Voucher specimens were deposited in the Freshwater Algal Herbarium (IHB), Institute of Hydrobiology, Chinese Academy of Sciences. The unialgal strain was aerially cultivated in a photo-reactor described by Chen et al. [25].
