Germin-like proteins (GLPs) are ubiquitous water-soluble glycoproteins that are located in the extracellular matrix. These proteins have been reported to play vital roles in diverse biological processes. In the present study, a GLP in soybean (Glycine max L. Merr.), GmGLP10, was characterized. Sequence analysis revealed that the GmGLP10 gene (GenBank Accession Number EU916258) encodes a 213-amino acid (aa) protein, which contains a N-terminal signal peptide at 1-22 aa and is highly homologous to the members of the GER2 subfamily. GmGLP10 was highly expressed in the leaves, but very faint in the roots. The expression of GmGLP10 was induced by methyl jasmonate (MeJA), ethylene (ET), salicylic acid (SA), oxalate acid (OA), and the infection of Sclerotinia sclerotiorum. Overexpression of GmGLP10 in transgenic tobacco significantly enhanced tolerance to OA and S. sclerotiorum infection. Moreover, higher levels of HO and the upregulated expression of a set of plant defense-related genes and HR (hypersensitive response)-associated genes were detected in the transgenic plants. These results suggest that GmGLP10 functions as a positive regulator of resistance to S. sclerotiorum.
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