A new fungitoxic metabolite from Spiraea alpina Pall.

The fungitoxic metabolites of Spiraea alpina Pall. were identified using inhibition of Rhizoctonia solani, Gibberella zeae, Pyricularia oryzea and Exserohilum turcicum as an end-point. The major fungitoxic constituent of S. alpina was a new diacylated sugar, structurally elucidated as 6-O-(3′,4′-dihydroxy-2′-methylenbutyryl)-1-O-trans-cinnamoyl-β-D-glucopyranose. This compound could inhibit at 0.1 mg/ml Rhizoctonia solani and Exserohilum turcicum, 87.6% and 63.2%, respectively.

Graphical abstractThe major phytopathogenic fungi growth inhibitor from Spiraea alpina Pall. was found identified in the novel diacylated sugar 1.Figure optionsDownload full-size imageDownload as PowerPoint slide