Figure 4.

The OTU number and diversity response of the jejunal microbiota to melatonin in the mice. (a) Venn diagram showing the number of OTUs. (b) The multy samples rarefaction curves showing the number of OTUs grows with the number of sequences sampled. (c) The statistics of OTU number for the CON, SR, and SR+MT groups. (d) Relative abundance of the species rank curves is used to explain both the richness and evenness of the species contained. (e) The multy samples rarefaction curves showing the Shannon index grows with the number of sequences sampled. Shannon index (f), Chao1 index (g), ACE index (h), and Simpson (i) index in the CON, SR, and SR + MT groups. Values are means SE. P < 0.05 as significant difference, marked with different lowercase letters