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Cadmium binding and soil microbial diversity in Vetiveria zizanioides

A B

Figure 6. Soil microbial diversity under different treatment. (A) Over-the-counters count and (B) observed
species number for the different soil sample types, The bacterial genus Sphingomonas is represented by purple
bars in (A) belonging to the Phylum Pseudomonatota. This Phylum is synonym with Phylum Proteobacteria
(B); (B: Clean soil without Vetiveria zizanioides planting; V: Clean soil in the presence of V. zizanioides; Cd20:
Cadmium contaminated soil mg/kg]; Cd60: Cadmium contaminated soil [60 mg/kg])
[20

A B

Figure 7. Species relative abundance at genus level (A) and phylum level (B). The bacterial genus Sphingomonas
belongs to the Pseudomonatota phylum, which is synonymous with the Proteobacteria phylum. Soil treatment
definitions: B: Clean soil without Vetiveria zizanioides; V: Clean soil in the presence of V. zizanioides; Cd20:
Cd-contaminated soil (20 mg/kg); Cd60: Cd-contaminated soil (60 mg/kg)

Table 3. Indices of alpha diversity
Sample Observed species Shannon Simpson Chao1 ACE
B 1223 8.501 0.993 1410.789 1359.89
V 1864 9.395 0.996 2107.594 2130.127
Cd20 1853 9.473 0.997 2203.743 2164.503
Cd60 1620 9.231 0.996 1800.555 1865.044
Soil treatment definitions: B: Clean soil without Vetiveria zizanioides; V: Clean soil in the presence of V. zizanioides;
Cd20: Cd-contaminated soil (20 mg/kg); Cd60: Cd-contaminated soil (60 mg/kg).

Volume 22 Issue 2 (2025) 37 doi: 10.36922/AJWEP025040021