Table 2.

Plant drought stress tolerance mediated by synergy between microbes and soil amendment

Plant species	Microbes	Amendment	Plant productivity and tolerance outcome	References
Arundo donax	Micrococcaceae HW-2	Sodium polyacrylate	Microbial attributes of plant hormone, deaminase and siderophore production and enhanced water retention capacity of sodium polyacrylate promoted shoot growth, biomass, and root of the plant	Hong et al. (2016)
Thymus vulgaris Santolina chamaecyparissus Lavandula dentate Salvia officinalis	Enterobacter sp. Bacillus thuringiensis Bacillus megaterium Bacillus sp.	Fermented agrowaste	The amendment enhanced nutrient uptake via bacterial stimulated activities for proper nutrient absorption by plants and stomatal conductance during drought stress	Armada et al. (2015b)
Pinus halepensis	Azospirillum brasilense Pantoea dispersa	Olive-mill waste	The treatment and the inoculants promoted the carbohydrate and microbial biomass carbon as well as soil nutrient and consequently increased growth, water content and nutrient uptake by the plant	Mengual et al. (2014a)
Lavandula dentata L.	Bacillus megaterium Enterobacter sp. Bacillus thuringiensis Bacillus sp.	Composted sugar beet	It increased biomass shoot dry weight, root, and nutrient content of the plant. The amendment increased the concentration of bioavailable phosphorus and nitrogen in the plant rhizosphere	Mengual et al. (2014b)
Cistus albidus L.	Azospirillum brasilense Pantoea dispersa	Olive residue	Increased dry root, shoot weight, organic carbon, soil enzymes, and microbial biomass carbon	Schoebitz et al. (2014)