Table 2.
Rhizobacterial phytohormones that mediate abiotic stress tolerance in plants.
| Abiotic stress | Rhizobacteria | Phytohormones | Crop | Test conditions | References |
|---|---|---|---|---|---|
| Drought/heat | Azospirillum brasilense | ABA, ET | Maize (Z. mays) | Potted | Curá et al. (2017) |
| Bacillus tequilemsis | GA, IAA | Soybean (Glycine max) | Potted | Kang et al. (2019) | |
| B. subtilis | CK | P. orientalis | Potted | Liu et al. (2013) | |
| Methylobacterium oryzae | CK | Lentils (Lens culinaris) | Growth Chamber | Jorge et al. (2019) | |
| P. fluorescens | CK | Tomato (Solanum lycopersocum) | Potted | Mekureyaw et al. (2022) | |
| P. fluorescens | IAA | Wheat (T. aestivum) | Potted | Chandra et al. (2018) | |
| Bacillus spp. | IAA, GA | Maize (Z. mays) | Potted | Vardharajula et al. (2011) | |
| Bacillus spp., Enterobacter spp | IAA | Velvet bean (M. pruriens) | Potted | Saleem et al. (2018) | |
| Pseudomonas aeruginosa | IAA | Mung bean (Vigna radiata) | Lab, pot, field | Uzma et al. (2022) | |
| Ochrobactrum pseudogrignonense, Pseudomonas sp., B. subtilis | IAA | Black gram (Vigna mungo) | In vitro/potted | Saikia et al. (2018) | |
| Achromobacter xylosoxidans, Pseudomonas oryzihabitans, Variovorax paradoxus | Auxins | Potato (Solanum tubrosum) | Potted | Belimov et al. (2015) | |
| A. baldaniorum | SA, JA, ABA | Purple basil (Ocimum basilicum) | Hydroponic system | Mariotti et al. (2021) | |
| B. aryabhattai | IAA, JA, GA | Soybean (G. max) | Potted | Park et al. (2017) | |
| Salinity | A. woluwensis, M. oxydans, A. aurescens, B. megaterium, B. aryabhattai | IAA, GA | Soybean (G. max) | In vitro | Khan et al. (2019) |
| Glutamicibacter arilaitensis, Enterobacter cloacae, Leclercia adecarboxylata, B. subtilis, | IAA | Tomato (S. lycopersicum) | Potted | Haque et al. (2022) | |
| Pseudomonas pseudoalcaligenes, B. subtilis | IAA | Soybean (G. max) | Hydroponic system | Yasmin et al. (2020) | |
| Aneurinibacillus aneurinilyticus, Paenibacillus | IAA | French bean (Phaseolus vulgaris) | Potted | Gupta and Pandey (2019) | |
| Bacillus xiamenensis | IAA | Sugarcane (Saccharum officinarum) | Greenhouse/potted | Sharma et al. (2021) | |
| Pseudomonas stutzeri, Klebsiella pneumoniae | IAA | Rice (O. sativa) | Greenhouse/potted | Khumairah et al. (2019) | |
| Pseudomonas plecoglossicida | IAA | Maize (Z. mays) | Greenhouse/potted | Zerrouk et al. (2019) | |
| Glutamicibacter sp. | IAA | Rice (O. sativa) | In vitro | Ji et al. (2020) | |
| Rhizobium | IAA | Canola (Brassica napus) | Potted | Saghafi et al. (2018) | |
| P. putida | IAA | Citrus (Citrus latifolia) | Potted | Vives-Peris et al. (2018) | |
| Ancylostoma braziliense, Azotobacter chroococcum | IAA, CK | Coriander spp. | Potted | Rabiei et al. (2020) | |
| Salinity & alkalinity | Bacillus licheniformis | ABA | Chrysanthemum spp. | Potted | Zhou et al. (2017) |
ABA, abscisic acid; ET, ethylene; GA, gibberellic acids; CK, cytokinins; IAA, indole-3-acetic acid; SA, salicylic acid; JA, jasmonic acid.