My research interests include investigating tryptophan dependent pathways of auxin biosynthesis in plants in particular role of aldehyde oxidase, nitrilase, and amidase. I am also focusing on the importance of IAA on various aspects of grain development in crop plants including rice, wheat, barley and sorghum

Abu-zaitoon, Y.M. & Nonhebel, H.M. (2009). Investigation of the tryptamine pathway of auxin biosynthesis in developing rice grains. ComBio 2009, Christchurch, New Zealand.

Nonhebel, H.M. & Abu-zaitoon, Y.M. (2010). Correlations between expression of putative auxin synthesis genes and IAA content of developing rice grains. IPGSA, the 20^th International Conference on Plant Growth Substances, Tarragona, Spain.