Biotech Updates

GmSAMT1 Overexpression in Soybean Confers Resistance to Soybean Cyst Nematode Races

May 25, 2016

Soybean salicylic acid methyl transferase (GmSAMT1) catalyzes the conversion of salicylic acid to methyl salicylate. Previous studies have shown that GmSAMT1 overexpression in soybean conferred resistance against soybean cyst nematode (SCN), Heterodera glycines Ichinohe.

Researchers from the University of Tennessee, Oak Ridge National Laboratory and USDA-ARS led by Jingyu Lin produced transgenic soybean overexpressing GmSAMT1 and characterized their response to various SCN races. Transgenic plants caused a significant reduction in the development of SCN races 2, 3, and 5. There was no significant difference in seed yield between the transgenic and non-transgenic soybean under conditions with negligible SCN infection.

GmSAMT1 expression affects salicylic acid biosynthesis which hampers SCN development without negative consequences to yield or morphological traits. GmSAMT1 overexpression confers broad resistance to multiple SCN races, which would be applicable to commercial production.

To learn more on this study, read the article in Plant Biotechnology Journal.