期刊
ECOLOGY LETTERS
卷 24, 期 5, 页码 984-995出版社
WILEY
DOI: 10.1111/ele.13713
关键词
phenylalanine; plant defence strategies; plant phenols; plant silicon; plant– herbivore interactions; resource availability hypothesis; resource limitation; silica‐ based defence; soil fertility gradient; trade‐ offs
类别
资金
- 'Fonds National de la Recherche Scientifique' of Belgium (FNRS) [SiCliNG CDR J.0117.18]
The study found that plants growing on nitrogen (N) limited young soils tend to express phenol-based defences, while plants on old, phosphorus (P) impoverished soils favor silica-based defences. The two types of defences show a negative correlation at both the community and individual species level.
The resource availability hypothesis predicts that plants adapted to infertile soils have high levels of anti-herbivore leaf defences. This hypothesis has been mostly explored for secondary metabolites such as phenolics, whereas it remains underexplored for silica-based defences. We determined leaf concentrations of total phenols and silicon (Si) in plants growing along the 2-million-year Jurien Bay chronosequence, exhibiting an extreme gradient of soil fertility. We found that nitrogen (N) limitation on young soils led to a greater expression of phenol-based defences, whereas old, phosphorus (P)-impoverished soils favoured silica-based defences. Both defence types were negatively correlated at the community and individual species level. Our results suggest a trade-off among these two leaf defence strategies based on the strength and type of nutrient limitation, thereby opening up new perspectives for the resource availability hypothesis and plant defence research. This study also highlights the importance of silica-based defences under low P supply.
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