期刊
FORESTS
卷 12, 期 8, 页码 -出版社
MDPI
DOI: 10.3390/f12081000
关键词
allelopathy; leaf litter; condensed tannins; mangrove forests; natural regeneration
类别
资金
- National Natural Science Foundation of China [41876090, 41976161]
- Shenzhen Key Laboratory of Southern Subtropical Plant Diversity [SSTLAB-2021-01]
- Research Grants Council of the Hong Kong Special Administrative Region, China [UGC/IDS(R)16/19]
This study found that leaf litter from Kandelia obovata has allelopathic effects on the germination and growth of Aegiceras corniculatum, with their purified condensed tannins exerting a stronger inhibitory effect, and the inhibitory effects were concentration dependent. This suggests that condensed tannins from leaf litter could regulate the natural regeneration of a mangrove forest.
Kandelia obovata (Ko) and Aegiceras corniculatum (Ac) are common and dominant plant species in mangrove wetlands in South China, which are distributed in similar tidal zones along the coastline. The present study aimed to determine the allelopathic effects of leaf litter leachates (LLLs) from Ko and their purified condensed tannins (PCTs) on the germination and growth of Ac by mangrove microcosms. Replicate pots containing five different levels of LLLs and PCTs were separately prepared and propagules of Ac were placed in each treatment. Both LLLs and PCTs significantly inhibited the germination and growth of Ac, especially at high concentrations. The final germination rates of the roots and stems and the numbers of fine roots declined continuously, while other growth indicators, including the lengths of fine roots and nutritive roots and the biomasses of roots, stems, and leaves first increased and then decreased with increasing levels. These results indicate that LLLs from the leaf litter of Ko, in particular their PCTs, exerted an inhibition effect on propagule germination and seedling growth of Ac, and the inhibitory effects were concentration dependent. This study suggested that condensed tannins from leaf litter, acting as allelochemicals, could regulate the natural regeneration of a mangrove forest.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据