Impact of Some Climate Change Parameters on Root, Nodule Formation and Nitrogen Fixation in Legumes

In the context of global climate change, the increase in carbon dioxide and temperature in the atmosphere is a fact that will increase drought and salinity. These changes have been reported to adversely affect legumes grown especially in arid and semi-arid climates. In this review, the effects of these adverse events on root-nodule formation and biological nitrogen fixation (BNF) are discussed. The symbiotic relationship between legumes and bacteria, together with increased CO2 conditions, accelerated nodule development and increased BNF. However, according to climate scenarios, temperature increases of 2-4 ° C with accompanying drought, decreased root hair infection, nodule number, nodule size, nodule growth and activity and BNF was found to be adversely affected. On the other hand, it was emphasized that salinity reduced nodule respiration and leghemoglobin content