Journal
PLANT AND SOIL
Volume 397, Issue 1-2, Pages 411-445Publisher
SPRINGER
DOI: 10.1007/s11104-015-2546-x
Keywords
Plant-growth-promoting rhizobacteria; Biofertilizers; Soybean; Rhizosphere interactions; Beneficial microorganisms; Rhizobia
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Funding
- Fulbright U.S. Student Program
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Heightened interest in biologically-based methods of raising crop yields has driven research into beneficial microorganisms that can be used to improve crop growth and productivity. This review addresses the potential of rhizobia, vesicular-arbuscular mycorrhizae (VAM), and plant-growth-promoting rhizobacteria to improve growth of soybean (Glycine max (L.) Merr) under temperate conditions. Mechanisms of action of beneficial microorganisms and considerations for utilization at all root-zone temperatures (RZTs) are reviewed. Subsequent sections address current knowledge on the inhibition of soybean growth at low RZTs and the potential of beneficial microorganisms to alleviate low temperature stress. The three categories of beneficial microorganisms discussed differ in their modes of action and have shown potential for additive or synergistic growth promotion of soybean at all RZTs. At low RZT, pot and field studies have identified strains of rhizobia and PGPR, as well as certain phytohormones, that ameliorate the inhibitory effects of cold stress on soybean growth through a variety of mechanisms. Wider use of these treatments could aid the expansion of soybean cultivation in cold climates.
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