Effects of heavy metals on bacterial community structure in the rhizosphere of Salsola collina and bulk soil in the Jinchuan mining area

ABSTRACT The plant–microbe interaction can affect ecosystem function, and many studies have demonstrated that plant species influence relevant microorganisms. In this study, microbial communities in bulk soil, rhizosphere soil and phyllosphere from different maize varieties were investigated using high-throughput sequencing method. Results demonstrated that cultivar Gaoneng 1 (G1) showed higher bacterial diversity in soil (both bulk and rhizosphere soils) and lower bacterial diversity in the phyllosphere, while cultivar Gaoneng 2 (G2) had lower fungal diversity in both the soil and phyllosphere compare to the other cultivars. The bacterial community structure of soils among the three varieties was significantly different; however, no significant differences were found in the soil fungal community and phyllosphere bacterial and fungal community. The soil networks from cultivar G1 and phyllosphere networks from cultivar Zhengdan (ZD) have the highest complexity in contrast to the other two cultivars. In conclusion, the bacterial community structure in bulk soil of different cultivars was significantly different, so do the co-occurrence ecological networks of phyllosphere bacterial community. This study comprehensively analyzed the microbial community among different maize cultivars and could be useful for guiding practices, such as evaluation of new plant cultivars and quality predictions of these varieties at the microbial level.

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Bacterial community structure and abundances of antibiotic resistance genes in heavy metals contaminated agricultural soil

Environmental Science and Pollution Research ◽

10.1007/s11356-018-1251-8 ◽

2018 ◽

Vol 25 (10) ◽

pp. 9547-9555 ◽

Cited By ~ 11

Author(s):

Fengli Zhang ◽

Xiaoxue Zhao ◽

Qingbo Li ◽

Jia Liu ◽

Jizhe Ding ◽

...

Keyword(s):

Heavy Metals ◽

Antibiotic Resistance ◽

Community Structure ◽

Bacterial Community ◽

Resistance Genes ◽

Bacterial Community Structure ◽

Agricultural Soil ◽

Antibiotic Resistance Genes

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The Pioneering Role of Bryophytes in Ecological Restoration of Manganese Waste Residue Areas, Southwestern China

Journal of Chemistry ◽

10.1155/2021/9969253 ◽

2021 ◽

Vol 2021 ◽

pp. 1-19

Author(s):

Jun Ren ◽

Fang Liu ◽

Yang Luo ◽

Jian Zhu ◽

Xuqiang Luo ◽

...

Keyword(s):

Heavy Metals ◽

Community Structure ◽

Bacterial Community ◽

Bacterial Community Structure ◽

Mine Waste ◽

Community Diversity ◽

Mining Areas ◽

Available Nutrients ◽

Electrolytic Manganese ◽

Manganese Slag

The mining of manganese brings excellent wealth to humankind. However, it destroys the ecological environment, mainly manifested as heavy metal pollution and vegetation destruction. The restoration of ecological vegetation in manganese mining areas has become an important work after mineral exploitation. The effect of bryophytes on ecological restoration in mining areas is irreplaceable. The bryophytes diversity and its pioneering role in two types of manganese waste residue areas were investigated in Guizhou province, China. The results showed that there were 24 species of mosses in mine waste slag areas, and all of them belonged to 6 families and 15 genera; the species Gymnostomum subrigidulum, Pohlia gedeana, and Bryum atrovirens were the dominant mosses. There were 6 species of mosses in electrolytic manganese slag areas, and all of them belonged to 5 families and 5 genera. The dominant moss was B. atrovirens. The bryophytes diversity in the electrolytic manganese slag areas with lower pH was poorer than that in mine slag areas. The accumulation of heavy metals in mosses showed that B. atrovirens collected from two types of areas had a strong ability to accumulate Mn with the cumulants 5588.00 μg/g and 4283.41 μg/g, respectively. All mosses had a strong enrichment ability to Cd. It indicated that mosses had strong tolerance to heavy metals. Bryophytes increased the available nutrients and bacterial community diversity of mosses growth substrates in two types of areas. Besides, we studied the relationships between bacterial community structure and soil factors. The main soil factor affecting the bacterial community structure was available nitrogen (AN) in mine waste slag areas, while it was pH in the electrolytic manganese residue areas. The systematic study suggested that bryophytes increased the available nutrients and the microbial community diversity of the growth substrates in manganese waste residue areas, which provided the basic conditions for the growth of vascular plants.

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