Assertion: nodule | /r/HasProperty | oldroyd
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text: In contrast to the well‐documented plant–bacterium recognition and infection processes, as well as the de novo organogenesis and functioning of the nodule (Oldroyd and Downie, 2008 ; Oldroyd, 2013 ; Udvardi and Poole, 2013 ; Suzaki et al ., 2015 ), the mechanisms underlying the acquisition and preservation of nodule identity as well as the maintenance of the different meristematic zones present in the nodule remain poorly described.