Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions
Resistance strategies of clonal organs, and parent and offspring shoots of Phragmites australis (common reed) to heavy metal pollution in soils are not well known. To clarify the tolerance or resistance strategies in reeds, we conducted a pot experiment with five levels of Pb concentration (0∼4,500...
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PeerJ Inc.
2018-01-01
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| Online Access: | https://peerj.com/articles/4188.pdf |
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| author | Na Zhang Jinwei Zhang Zhiqiang Li Jing Chen Zhenhua Zhang Chunsheng Mu |
| author_facet | Na Zhang Jinwei Zhang Zhiqiang Li Jing Chen Zhenhua Zhang Chunsheng Mu |
| author_sort | Na Zhang |
| collection | DOAJ |
| description | Resistance strategies of clonal organs, and parent and offspring shoots of Phragmites australis (common reed) to heavy metal pollution in soils are not well known. To clarify the tolerance or resistance strategies in reeds, we conducted a pot experiment with five levels of Pb concentration (0∼4,500 mg kg−1) in flood and drought conditions. Lead toxicity had no inhibitory effect on the number of offspring shoots in flood environment; however, biomass accumulation, and photosynthetic and clonal growth parameters were inhibited in both water environment. At each treatment of Pb concentration, offspring shoots had greater biomass and higher photosynthesis indicators than parent shoots. The lowest Pb allocation was found in rhizomes. More of the Pb transported to above-ground parts tended to accumulate in parent shoots rather than in offspring shoots. Biomass and photosynthesis of offspring shoots, rhizome length, and the number of buds, rhizomes and offspring shoots in the flooded treatment were significantly greater than those in the drought treatment. Our results indicated that the tolerance strategies used by reeds, including higher biomass accumulation and photosynthesis in offspring shoots, low allocation of Pb in rhizomes and offspring shoots, and stable clonal growth, maintained the stability of population propagation and productivity, improving the resistance of reeds to Pb pollution in flood environment. However, the resistance or tolerance was significantly reduced by the synergistic effect of Pb and drought, which significantly inhibited biomass accumulation, photosynthesis, and clonal growth of reeds. |
| first_indexed | 2024-03-09T06:38:53Z |
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| language | English |
| last_indexed | 2024-03-09T06:38:53Z |
| publishDate | 2018-01-01 |
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| spelling | doaj.art-10640def3f574346872dd43cfc175e462023-12-03T10:53:44ZengPeerJ Inc.PeerJ2167-83592018-01-016e418810.7717/peerj.4188Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditionsNa Zhang0Jinwei Zhang1Zhiqiang Li2Jing Chen3Zhenhua Zhang4Chunsheng Mu5Institute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, ChinaKey Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, ChinaAcademy of Climate Change and Public Policy, Nanjing University of Information Science and Technology, Nanjing, ChinaKey Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huaian, ChinaInstitute of Agricultural Resource and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, ChinaKey Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, ChinaResistance strategies of clonal organs, and parent and offspring shoots of Phragmites australis (common reed) to heavy metal pollution in soils are not well known. To clarify the tolerance or resistance strategies in reeds, we conducted a pot experiment with five levels of Pb concentration (0∼4,500 mg kg−1) in flood and drought conditions. Lead toxicity had no inhibitory effect on the number of offspring shoots in flood environment; however, biomass accumulation, and photosynthetic and clonal growth parameters were inhibited in both water environment. At each treatment of Pb concentration, offspring shoots had greater biomass and higher photosynthesis indicators than parent shoots. The lowest Pb allocation was found in rhizomes. More of the Pb transported to above-ground parts tended to accumulate in parent shoots rather than in offspring shoots. Biomass and photosynthesis of offspring shoots, rhizome length, and the number of buds, rhizomes and offspring shoots in the flooded treatment were significantly greater than those in the drought treatment. Our results indicated that the tolerance strategies used by reeds, including higher biomass accumulation and photosynthesis in offspring shoots, low allocation of Pb in rhizomes and offspring shoots, and stable clonal growth, maintained the stability of population propagation and productivity, improving the resistance of reeds to Pb pollution in flood environment. However, the resistance or tolerance was significantly reduced by the synergistic effect of Pb and drought, which significantly inhibited biomass accumulation, photosynthesis, and clonal growth of reeds.https://peerj.com/articles/4188.pdfPhragmites australisFlooded treatmentPhotosynthesisDroughtClonal growthBiomass allocation |
| spellingShingle | Na Zhang Jinwei Zhang Zhiqiang Li Jing Chen Zhenhua Zhang Chunsheng Mu Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions PeerJ Phragmites australis Flooded treatment Photosynthesis Drought Clonal growth Biomass allocation |
| title | Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions |
| title_full | Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions |
| title_fullStr | Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions |
| title_full_unstemmed | Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions |
| title_short | Resistance strategies of Phragmites australis (common reed) to Pb pollution in flood and drought conditions |
| title_sort | resistance strategies of phragmites australis common reed to pb pollution in flood and drought conditions |
| topic | Phragmites australis Flooded treatment Photosynthesis Drought Clonal growth Biomass allocation |
| url | https://peerj.com/articles/4188.pdf |
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