[Correlation Between Water Purification Capacity and Bacterial Community Composition of Different Submerged Macrophytes].

Eight submerged macrophytes are commonly found in subtropical areas, including and and these eight macrophytes were selected as research objects. The absorption capacity of nitrogen and phosphorus and water purification ability of submerged macrophytes were compared under indoor static water conditions. Furthermore, combining the bacterial community composition of submerged macrophytes, which was determined by 16S rRNA gene sequencing, the correlation between the water purification ability and the bacterial community of submerged macrophytes was determined. The results showed that all of the submerged macrophytes had obvious purification effects on nitrogen and phosphorus in water. The removal of nitrogen and phosphorus by submerged macrophytes was mainly through plant synergism, and the removal rate of plant absorption and enrichment was low. Among them, the removal rate of nitrogen and phosphorus was the highest in , reaching 91.58% and 96.81%. The self-absorption ability of nitrogen and phosphorus from water of and was higher than other groups. The plant synergistic purification ability of and was the highest. The absolute dominant phyla of eight submerged macrophyte-associated bacteria were Proteobacteria (abundance values were more than 40%). At the genus level, , , and were the dominant genera for different submerged macrophytes. Most of these bacterial groups were degradable, which may be the main reason for the strong ability of eight submerged macrophytes to purify nitrogen and phosphorus in the water. The LEfSe analysis showed that and had the highest number of bacteria with significant differences. Among them, Rhizobiales, Burkholderiales, Flavobacteriales, Alcaligenaceae, , and may be the dominant bacteria to enhance the efficiency of plant purification of the water by The bacteria of Deinococci, Comamonadaceae, Saprospiraceae, and may be the dominant bacteria to enhance the efficiency of plant purification of the water by