Abstract
The coevolution of mycorrhizae with plants represents a major evolutionary adaptation to the land environment. As a bioinoculant, arbuscular mycorrhizal fungi (AMF) play a beneficial role in sustainable agriculture by symbiotically associating with many crop plants. In this review, we primarily focus on the nutritional and non-nutritional functionality of AMF in soil and plant productivity. AMF maintain soil quality and health via three aspects: soil structure, plant physiology, and ecological interactions. These lead plants to increase their functionality, further growth, and productivity. The formation of soil aggregates via glomalin production maintains the soil structure. Physiologically, AMF change nutrient acquisition and thereby increase soil fertility and productivity. Biotic (pathogens and weed plants) and abiotic (salinity, drought, extreme temperature, soil pH, and heavy metals) stress alleviation is also achieved via altering a plant’s physiological status. By serving as a biocontrol agent, AMF negatively interact with plant pathogens. As a result of beneficial interactions with other rhizosphere microorganisms and above-ground organisms, AMF induce a synergistic effect on plant performance. Moreover, they are also involved in land restoration and seedling establishment. The collective effect of all these functions positively influences overall plant performance and productivity.
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