Water-level fluctuations are common abiotic stresses influencing growth and physiological processes of wetland plants. Nonetheless, little is known about plant eco-physiological responses and growth strategy under multi-hydrological processes. Carex schmidtii was grown under the conditions with interaction of initial water-level depth (DW) and water-level amplitude (AW). Dynamics of plant eco-physiological traits and growth strategy were investigated continuously during the entire growth stages. Results indicated that leaf morphology was significantly affected by DW and lasted time, and leaf width was sensitive to AW. The SLA and LDMC of C. schmidtii varied significantly at different lased time, and their relationships indicated the trade-off in leaves between matter production and nutrient conservation. Increasing DW inhibited matter production of C. schmidtii in early growth stage, but increased nutrient conservation in late growth stage. However, increasing AW contributed to both increase of matter production and nutrient conservation of C. schmidtii . The photosynthetic pigments of C. schmidtii are relatively sensitive to DW, AW and their interaction. Slowing down water-level fluctuations and appropriate water management in the key growth stage will assist with the adaption of Carex schmidti i. The findings provide invaluable supporting information for the management and conservation of C. schmidtii tussock wetlands.

中文翻译：

---

Carex schmidtii 对水位波动的生长和生理反应

水位波动是影响湿地植物生长和生理过程的常见非生物胁迫。尽管如此，人们对多水文过程下的植物生态生理反应和生长策略知之甚少。Carex schmidtii 在初始水位深度 (DW) 和水位振幅 (AW) 相互作用的条件下生长。在整个生长阶段不断研究植物生态生理性状和生长策略的动态。结果表明，叶片形态受DW和持续时间的影响显着，叶片宽度对AW敏感。C. schmidtii 的 SLA 和 LDMC 在不同的激光时间下变化显着，它们的关系表明叶片在物质生产和养分保存之间的权衡。增加 DW 在生长早期抑制了 C. schmidtii 的物质产生，但在生长后期增加了养分保存。然而，增加 AW 有助于增加 C. schmidtii 的物质产量和养分保存。C. schmidtii 的光合色素对 DW、AW 及其相互作用相对敏感。在关键生长阶段减缓水位波动和适当的水管理将有助于Carex schmidti i的适应。研究结果为 C. schmidtii tussock 湿地的管理和保护提供了宝贵的支持信息。C. schmidtii 的光合色素对 DW、AW 及其相互作用相对敏感。在关键生长阶段减缓水位波动和适当的水管理将有助于Carex schmidti i的适应。研究结果为 C. schmidtii tussock 湿地的管理和保护提供了宝贵的支持信息。C. schmidtii 的光合色素对 DW、AW 及其相互作用相对敏感。在关键生长阶段减缓水位波动和适当的水管理将有助于Carex schmidti i的适应。研究结果为 C. schmidtii tussock 湿地的管理和保护提供了宝贵的支持信息。