Abstract
We investigated the effects of aqueous extract from litter of Spartina alterniflora with different concentrations (0, 0.02, 0.04, 0.10 mg·L-1) on the growth and physiological characteristics of Skeletonema costatum. The cell concentration of S. costatum, chlorophyll-a content, antioxidant enzyme (superoxide dismutase and peroxidase) activities and malondialdehyde content were examined. Moreover, we isolated and identified the algicidal allelochemicals from S. alterniflora. The results showed that the inhibitory effect of the extract of S. alterniflora litter on the growth of S. costatum increased with the extract concentrations. The inhibitory rate was 69.2% under 0.10 mg·L-1 of extract. The content of chlorophyll a and the activities of antioxidant enzyme were lower in all treatments than the control, and the content of malondialdehyde increased in all treatments. The components of allelochemicals from S. alterniflora were mainly composed of long-chain fatty acids, including hexadecanoic acid, linoleic acid, and oleic acid.
| Original language | English |
|---|---|
| Pages (from-to) | 1969-1975 |
| Number of pages | 7 |
| Journal | Chinese Journal of Ecology |
| Volume | 37 |
| Issue number | 7 |
| DOIs | |
| State | Published - 2018 |
| Externally published | Yes |
Keywords
- Allelochemical
- Aqueous extract
- Inhibitory effect
- Skeletonema costatum
- Spartina alterniflora