GENES IMPLICATED IN RESISTANCE TO SOYBEAN CYST NEMATODE INFECTION AND METHODS OF THEIR USE

摘要

To gain new insights into the mechanism of soybean resistance to the soybean cyst nematode (Heterodera glycines), gene expression profiles of developing syncytia in soybean near-isogenic lines (NILs) differing at the at Rhg1 locus were compared. Gene expression profiling revealed that 1,447 genes were differentially expressed between the line that is resistant to SCN and the line that is sensitive to SCN infection. These results indicate that syncytia induced in the resistant line are undergoing severe oxidative stress and imbalanced endoplasmic reticulum homeostasis, both of which likely contribute to the resistance reaction. Defense-related genes up-regulated within syncytia of the resistant line included those predominantly involved in apoptotic cell death, the plant hypersensitive response, and salicylic acid (SA)-mediated defense signaling; many of these genes were partially suppressed by a virulent soybean cyst nematode population for successful nematode reproduction and development on the resistant line. Expression of these SCN responsive genes may be manipulated to obtain SCN resistant lines.