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摘要
The allelopathic effects of decomposing leaf litter of E. grandis were studied on the growth, photosynthetic pigments and antioxidant enzymes of S. viridis. Growth of S. viridis was significantly inhibited in the presence of decomposing E. grandis leaf litter and application of nitrogen did not overcome the inhibition. Photosynthetic pigments in S. viridis leaves were significantly decreased when exposed to allelopathic substances. The activities of antioxidant enzymes decreased with the increase in malonaldehyde content in leaves Of S. viridis treated with decomposing leaf litter of E. grandis, especially in the early stage of leaf litter decomposition. This suggested the accumulation of reactive oxygen species (ROS) and damage to membrane lipids. Thus, failure to quench excessive ROS affected the growth of S. viridis. By GC-MS analyses, a total of 33 potential allelopathic compounds were detected in naturally decomposing E. grandis leaf litter. Of these compounds, terpenes were the major allelochemicals identified. The decomposing leaf litter of E. grandis had strong allelopathic effects on the growth of S. viridis.
- 出版日期2014-7
- 单位四川农业大学
