Table 2.

Regulation of the functions of major soil bacterial communities in tea gardens.

Functions	Mechanisms	Phyla of microorganisms	Examples (Genera)	References
Biofertilizers (Plant growth promoters)	Indole-3- acetic acid production	Firmicutes, Proteobacteria, Actinobacteria Acidobacteria	Bacillus, Pseudomonas, Enterobacter, Brevibacillus, Burkholderia, Leifsonia, Achromobacter, Klebsiella Staphylococcus, Nocardia, Ochrabactrum, Micrococcus, Arthrobacter, Streptomyces	Dutta and Thakur (2017), Shan et al. (2018), and Bhattacharyya et al. (2020)
	Siderophore production	Firmicutes, Proteobacteria, Actinobacteria, Acidobacteria	Bacillus, Pseudomonas, Enterobacter, Brevibacillus, Burkholderia, Leifsonia, Achromobacter, Klebsiella Staphylococcus, Arthrobacter, Micrococcus, Ochrabactrum, Streptomyces	Dutta and Thakur (2017), Bhattacharyya et al. (2020), and Kolandasamy et al. (2023)
	ACC deaminase production	Actinobacteria Firmicutes, Acidobacteria Proteobacteria	Bacillus, Pseudomonas, Enterobacter, Brevibacillus, Burkholderia, Streptomyces, Achromobacter, Klebsiella Staphylococcus, Ochrabactrum, Micrococcus,	Dutta and Thakur (2017), Shan et al. (2018), Bhattacharyya et al. (2020), and Kolandasamy et al. (2023)
Biofertilizers (Nutrient cycling)	Phosphate solubilization	Firmicutes, Proteobacteria, Actinobacteria, Acidobacteria	Bacillus, Pseudomonas, Enterobacter, Brevibacillus, Burkholderia, Arthrobacter, Achromobacter, Klebsiella Staphylococcus, Leifsonia, Ochrabactrum, Micrococcus, Streptomyces	Dutta and Thakur (2017), Bhattacharyya et al. (2020), and Kolandasamy et al. (2023)
	Potassium solubilizing	Firmicutes, Proteobacteria, Acidobacteria, Actinobacteria	Bacillus, Burkholderia, Pseudomonas, Paenibacillus, Acidothiobacillus, Rhizobium, Azospirillium, Arthrobacter	Bagyalakshmi et al. (2017), Bhattacharyya and Sarmah (2018), and Zhang X. C. et al., 2022
	Ammonia production	Firmicutes, Proteobacteria, Actinobacteria,	Bacillus, Pseudomonas, Enterobacter, Brevibacillus, Arthrobacter, Burkholderia, Ochrabactrum, Micrococcus, Achromobacter, Klebsiella, Leifsonia, Staphylococcus,	Dutta and Thakur (2017) and Bhattacharyya et al. (2020)
	Nitrogen fixation	Proteobacteria, Firmicutes, Acidobacteria, Actinobacteria	Burkholderia, Azospirillum, Pseudomonas, AcidocapsaMethylobacterium, Azotobacter, Acinetobacter, Streptomyces, Klebsiella	Bhaduri et al. (2018), Yan et al. (2018), and Cernava et al. (2019)
Biocontrol	biosurfactant production	Actinobacteria, Firmicutes, Acidobacteria,	Bacillus, Brevibacterium, Pseudomonas	Banik et al. (2019) and Chopra et al. (2020a,b)
	antifungal/antibiotics production	Actinobacteria, Firmicutes Acidobacteria	Bacillus, Pseudomonas, Enterobacter, Brevibacillus, Burkholderia, Actinomadura,Achromobacter, Klebsiella Staphylococcus, Serratia, Streptomyces	Dutta and Thakur (2017), Dhar Purkayastha et al. (2018), Shan et al. (2018), and Kolandasamy et al. (2023)
Soil structure	Stabilizing soil aggregates	Actinobacteria, Firmicutes, Chloroflexi, Proteobacteria	Streptomyces, Nocardia, Actinomadura, Rhizobium	Wang et al. (2021) and Wang et al. (2023)
Tolerance to stress	Enhances resistance to abiotic stress	Firmicutes Actinobacteria Acidobacteria	Pseudomonas, Bacillus, Streptomyces, Leifsonia, Ochrabactrum, Micrococcus, Arthrobacter, Nocardia, Actinomadura	Bhattacharyya et al. (2020), Bag et al. (2021), and Kolandasamy et al. (2023)