Influence of different flooding depth on wetland plant Phalaris arundinacea
Global climate change and human activities have exacerbated changes in spatial and temporal patterns of precipitation, resulting in inundation stress for many wetland plants. We employed the double basin method to investigate the impact of varying inundation depths on Phalaris arundinacea aiming to...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2024-04-01
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| Series: | Journal of Freshwater Ecology |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/02705060.2024.2429564 |
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| Summary: | Global climate change and human activities have exacerbated changes in spatial and temporal patterns of precipitation, resulting in inundation stress for many wetland plants. We employed the double basin method to investigate the impact of varying inundation depths on Phalaris arundinacea aiming to elucidate its adaptive mechanisms to inundation. Water levels were set at various depths, ranging from 0 cm to 84 cm in 12 cm increments, and the experiment was conducted over a period of 60 days. It was found that different water levels had significant effects on the growth and physiological indices of the wetland plant (p < 0.01). As the water level increased from 0 cm to 84 cm, the overall plant height and biomass decreased significantly. The plant height in the 0 cm water level group increased significantly from 48.36 cm to 103.36 cm within 60 days (p < 0.01), and the plant died after 20 days at water levels of 48 cm and above; Chlorophyll (a + b) content showed a bimodal fluctuation and overall significant decrease in the 0 cm − 36 cm water level group (p < 0.01), and carotenoid content increased significantly (p < 0.01); POD activity was higher in the 0 cm − 36 cm water level groups, and SOD activity was higher in the 48 cm − 84 cm water level groups; the SP content increased significantly (p < 0.01), and the total soluble sugar and proline content decreased significantly (p < 0.01); The effects of water level gradient and testing time on the indices were significant (p < 0.01) and the interaction was significant (p < 0.01). In general, P. arundinacea exhibits tolerance to water stress, surviving within the 0 cm − 36 cm water levels range, with the 0 cm water level being most favorable for its growth and development. |
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| ISSN: | 0270-5060 2156-6941 |