Helophytes adapt to water and N-enrichment stresses by adjusting and coordinating stoichiometry characteristics in main organs
| 第一作者： |
Zhou, Mengdie |
| 英文第一作者： |
Zhou, Mengdie |
| 联系作者： |
Lou, Yanjing |
| 英文联系作者： |
Lou, Yanjing |
| 发表年度： |
2023 |
| 卷： |
898 |
| 摘要： |
Exploring the adaptation strategies of plants under stressful environments from an ecological stoichiometry perspective is a critical but underexplored research topic, and multi-organ collaborative research for multispecies can provide a comprehensive understanding. In this study, helophytes were selected as the subjects, and water depth and water N-enrichment were set as the stressors. A simulation experiment including three water depths (drought stress, control and flooding stress) and four water N-enrichment levels (control, low, medium and high N-enrichment stresses) for six helophyte species was carried out. Overall, C concentrations in all plant organs remained stable under water (drought-flooding stress) and N-enrichment stress. N concentrations increased under both flooding and drought stresses, while P concentrations and the N:P ratio showed an increase and decrease under only flooding stress, respectively. N concentration and N:P ratio increased with water Nenrichment level. The interaction only promoted the accumulation of N concentrations in aboveground organs. Especially, several species also changed organ C concentrations to adapt to water stress and adjusted root N concentrations for the combined stresses of flooding or drought and high N. Leaf and stem were strongly synergistic in N element, and leaf and root were mainly synergistic in P element. Water N-enrichment determined organ element concentrations more than water depth, and species identity dictated organ C:N:P ratios. Our results reveal that the allocation and synergy of nutrients among organs are important adaptive strategies for plants in stressful environments. Meanwhile, increasing water N-enrichment can be an unignored stressor, and species identity should be paid attention as a countermeasure. |
| 刊物名称： |
SCIENCE OF THE TOTAL ENVIRONMENT |
| 参与作者： |
Zhou, Mengdie; Jin, Xianglong; Jiang, Ming; Lu, Xianguo; Lou, Yanjing |
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