Capsaicinoids from hot pepper ( Capsicum annuum L.) and their phytotoxic effect on seedling growth of lettuce ( Lactuca sativa L.)

  • Nat Prod Res. 2020 Jun;34(11):1597-1601. doi: 10.1080/14786419.2018.1519821.
Rongrong Wang  1 ,  Yang Liu  1 ,  Shiwei Sun  1 ,  Yueyue Si  1 ,  Xiaohong Liu  1 ,  Xiaoxiao Liu  1 ,  Shuang Zhang  1 ,  Wei Wang  1
Affiliations
  • 1. Department of Natural Medicine and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, China.
PMID: 30449166 DOI: 10.1080/14786419.2018.1519821
Abstract

One new capsaicinoid, N-vanillyl-4E,6E-dien-8-methylnonanamide (4), along with nine known capsaicinoids, capsaicin (1), dihydrocapsaicin (2), N-vanillyloctanamide (3), nordihydrocapsaicin (5), N-vanillyldecanamide (6), homocapsaicin (7), N-vanillyl-4,8-dimethylnonanamide (8), homodihydrocapsaicin II (9), and homodihydrocapsaicin I (10) were isolated from the fruits of Capsicum annuum using semi-preparative high-performance liquid chromatography. The structural characterizations of the isolated compounds were elucidated by spectroscopic data and comparison with the literatures. Bioassays showed that the isolated capsaicinoids significantly reduced the radical length of Lactuca sativa seedling, this inhibition being dose-dependent.

Keywords
Capsicum annuum L.; allelopathy; capsaicinoids.
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