1 23 Journal of Plant Research ISSN 0918-9440 Volume 125 Number 4 J Plant Res (2012) 125:507-516 DOI 10.1007/s10265-011-0464-4 Plant morphophysiological and anatomical factors associated with nitrous oxide flux from wheat (Triticum aestivum) K. K. Baruah, Boby Gogoi, Leena Borah, Manoshi Gogoi & R. Boruah