DOI: 10.1093/aob/mcz067
论文题名: Physiological and biochemical responses of the salt-marsh plant Spartina alterniflora to long-term wave exposure
作者: Shao D. ; Zhou W. ; Bouma T.J. ; Asaeda T. ; Wang Z.B. ; Liu X. ; Sun T. ; Cui B.
刊名: Annals of botany
ISSN: 10958290
出版年: 2020
卷: 125, 期: 2 语种: 英语
英文关键词: Spartina alterniflora
; Ecosystem-based flood defence
; response
; salt-marsh
; wave stress
英文摘要: BACKGROUND AND AIMS: Ecosystem-based flood defence including salt-marsh as a key component is increasingly applied worldwide due to its multifunctionality and cost-effectiveness. While numerous experiments have explored the wave-attenuation effects of salt-marsh plants critical to flood protection, little is known about the physiological and biochemical responses of these species to continuous wave exposure. METHODS: To address this knowledge gap, we developed a shallow-water wave simulator to expose individual Spartina alterniflora plants to waves in a greenhouse for 8 weeks. S. alterniflora individuals were partially submerged and experienced horizontal sinusoidal motion to mimic plant exposure to shallow water waves. A factorial experiment was used to test the effects of three wave heights (4.1 cm, 5.5 cm and a no-wave control) and two wave periods (2 s and 3 s) on the following key physiological and biochemical plant parameters: plant growth, antioxidant defence and photosynthetic capacity. KEY RESULTS: Comparison of wave treatment and control groups supported our hypotheses that wave exposure leads to oxidative stress in plants and suppresses plant photosynthetic capacity and thereby growth. In response, the wave-exposed plants exhibited activated antioxidant enzymes. Comparison between the different wave treatment groups suggested the wave effects to be generally correlated positively with wave height and negatively with wave period, i.e. waves with greater height and frequency imposed more stress on plants. In addition, wave-exposed plants tended to allocate more biomass to their roots. Such allocation is favourable because it enhances root anchorage against the wave impact. CONCLUSIONS: Simulated wave exposure systems such as the one used here are an effective tool for studying the response of salt-marsh plants to long-term wave exposure, and so help inform ecosystem-based flood defence projects in terms of plant selection, suitable transplantation locations and timing, etc. Given the projected variability of the global wave environment due to climate change, understanding plant response to long-term wave exposure has important implications for salt-marsh conservation and its central role in natural flood defence. © The Author(s) 2019. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159383
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Water Environment Simulation and School of Environment, Beijing Normal UniversityBeijing, China; National Meteorological Information CenterBeijing, China; NIOZ Royal Netherlands Institute for Sea Research (NIOZ), Netherlands; Department of Environmental Science, Saitama University, Shimo-okubo, Sakura, Saitama, Japan; Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; Deltares, Netherlands
Recommended Citation:
Shao D.,Zhou W.,Bouma T.J.,et al. Physiological and biochemical responses of the salt-marsh plant Spartina alterniflora to long-term wave exposure[J]. Annals of botany,2020-01-01,125(2)