Fig. 1: Physiological characteristics of V.spinulosa Yan leaves.

a Chlorophyll a + b content; b carotenoid content. ChlU+b represents chlorophyll a + b content. NW, AW, IW, and CK represent the natural lake water group, simulated lake water + Microcystis aeruginosa group, simulated lake water + kaolin group, and simulated lake water group, respectively. NWL, AWL, IWL, and CKL are the corresponding groups with underwater light source.