TABLE 4.

Improved ACC deaminase activity and reduced ethylene production by PGPR under drought stress.

Soil microbe/Strain	Plant species	Effect under drought	References
A. piechaudii	Tomato	Reduce the Ethylene production	Mayak et al., 2004
B. thuringiensis AZP2	Wheat	High Phosphate solubilizing efficiency, ACC deaminase activity, improved crop growth and biomass	Timmusk et al., 2014
Paenibacillus polymyxa B	Wheat	High Phosphate solubilizing efficiency, ACC deaminase activity, improved crop growth and biomass	Timmusk et al., 2014
P. fluorescens DR7	Millet	Promote plants growth under drought stress, ACC deaminase activity	Niu et al., 2018
B. Brevibacterium S91	Tea	Improved ACC deaminase activities and IAA production	Borah et al., 2019
Pseudomonas sp. N66	Sorghum	Lower the ethylene level by improving the ACC deaminase activities	Carlson et al., 2020
E. aerogenes	Rice	Improves rhizosphere health under mild drought stress through ACC deaminase activity	Zhang Y. et al., 2020