Nutrient Dependent Signaling Pathways Controlling the Symbiotic Nitrogen, Fixation Process

Symbiotic Nitrogen Fixation (SNF) is a vital process in agriculture since it allows for atmospheric nitrogen assimilation through legume-rhizobia symbiosis. This process sustains plant growth on nitrogen-poor soils and legumes are utilized in crop rotation cultivations for limiting N-fertilizers use, resulting in enhanced plant growth. SNF is also based on a complex relationship between the host-bacteria symbiosis and environment. The symbiosis can be affected by a number of abiotic constrains as soil composition (including nutrient availability), salinity and especially drought. Moreover, in the recent decades, considerable progresses have been made to explore novel genes controlling the symbiotic signaling pathways and nodule functioning in legume plants (Mergaert et al., 2020). The aim of the volume II of this Research Topic was to present new findings in these scientific field of study.