Abstract
β-cembrenediol((1S,2E,4R,6R,7E,11E)-2,7,11-cembratriene-4,6-diol), shown to be one of the most important allelochemicals of tobacco in our previous studies, effectively inhibited the root and shoot elongation of receptor plants in a concentration-dependent manner. However, its mechanism of action remains unclear. Seedlings of lettuce (Lactuca sativa) were now treated with β-cembrenediol to clarify its mode of action. Results showed that β-cembrenediol significantly inhibited the seeding growth and reduced fresh weight of L. saiva. The compounds effectively arrested cell division and caused cell death. Exposure to β-cembrenediol induced overproduction of reactive oxygen species. Moreover, increased levels of malondialdehyde, proline and hydrogen peroxide, and decreased in chlorophyll content indicated lipid peroxidation and induction of oxidative stress. These results suggested that β-cembrenediol caused oxidative damage through enhanced generation of ROS, as indicated by increased lipid peroxidation, disruption of membrane integrity and impacted mitosis, ultimately resulted in growth inhibition of the receptor plant.
Highlights
Allelopathy is a natural ecological phenomenon which involves the release of plant-produced secondary products into the environment by volatilization, root exudation, decomposition and/or leaching (Pan et al, 2015)
Lettuce seedlings were used as a receptor to illustrate the action mechanism for the phytotoxicity of β-cembrenediol
It was found that β-cembrenediol significantly inhibited the seeding growth and reduced fresh weight of L. sativa
Summary
Allelopathy is a natural ecological phenomenon which involves the release of plant-produced secondary products (allelochemicals) into the environment by volatilization, root exudation, decomposition and/or leaching (Pan et al, 2015). It influences the growth and development of neighboring plants or itself (Cruz-Ortega et al, 2007; Babula et al, 2009; Rial et al, 2014; Kimura et al, 2015; Pan et al, 2015). By showing inhibitory effects against lettuce and tobacco seedlings and being detected
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