{"title":"氮的种类对镉诱导的点灯藻毒性的影响","authors":"Xianglian Wang, Guiqing Gao, Ruikang Hu, Liang Hu, Baojun Zhang, Zhanmeng Liu, Yilong Zou, Kaiwen Xu, Daishe Wu","doi":"10.1080/15226514.2024.2377225","DOIUrl":null,"url":null,"abstract":"<p><p>Nitrogen (N) plays an important role in plant growth and developmental metabolic processes, research on nitrogen speciation regulating Cd accumulation in duckweed is still limited. In this study, the effects of three nitrogen sources (NH<sub>4</sub>Cl, Ca(NO<sub>3</sub>)<sub>2</sub> and NH<sub>4</sub>NO<sub>3</sub>) on the growth, Cd accumulation, and photosynthetic parameters of <i>Landoltia punctata</i> (<i>L.</i> <i>punctata</i>) were analyzed. The results showed that Cd enrichment in <i>L. punctata</i> was significantly reduced (<i>p <</i> 0.05) with different nitrogen treatments compared to the control (CK). Ammonium nitrogen (NH<sub>4</sub>-N) is more conducive to the accumulation of Cd in <i>L. punctata</i> than nitrate nitrogen (NO<sub>3</sub>-N). The sum of the cell wall components and soluble components of Cd in the NH<sub>4</sub>-N treatment group was greater than that in the NO<sub>3</sub>-N treatment group. The proportion of F<sub>NaCl</sub> extracts in the NH<sub>4</sub>-N treatment group was greater than in the NO<sub>3</sub>-N treatment group. NO<sub>3</sub>-N led to a greater reduction in photosynthetic pigment content than NH<sub>4</sub>-N. Overall, applying different forms of nitrogen can alleviate Cd toxicity in <i>L. punctata</i>, and the detoxification effect of the NH<sub>4</sub>-N treatment is stronger than that of NO<sub>3</sub>-N treatment. This study will provide theoretical and practical support for the application of duckweed in Cd phytoremediation even in eutrophic aquatic environments.</p>","PeriodicalId":14235,"journal":{"name":"International Journal of Phytoremediation","volume":" ","pages":"2127-2136"},"PeriodicalIF":3.4000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of nitrogen speciation on Cd-induced toxicity in <i>Landoltia punctata</i>.\",\"authors\":\"Xianglian Wang, Guiqing Gao, Ruikang Hu, Liang Hu, Baojun Zhang, Zhanmeng Liu, Yilong Zou, Kaiwen Xu, Daishe Wu\",\"doi\":\"10.1080/15226514.2024.2377225\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Nitrogen (N) plays an important role in plant growth and developmental metabolic processes, research on nitrogen speciation regulating Cd accumulation in duckweed is still limited. In this study, the effects of three nitrogen sources (NH<sub>4</sub>Cl, Ca(NO<sub>3</sub>)<sub>2</sub> and NH<sub>4</sub>NO<sub>3</sub>) on the growth, Cd accumulation, and photosynthetic parameters of <i>Landoltia punctata</i> (<i>L.</i> <i>punctata</i>) were analyzed. The results showed that Cd enrichment in <i>L. punctata</i> was significantly reduced (<i>p <</i> 0.05) with different nitrogen treatments compared to the control (CK). Ammonium nitrogen (NH<sub>4</sub>-N) is more conducive to the accumulation of Cd in <i>L. punctata</i> than nitrate nitrogen (NO<sub>3</sub>-N). The sum of the cell wall components and soluble components of Cd in the NH<sub>4</sub>-N treatment group was greater than that in the NO<sub>3</sub>-N treatment group. The proportion of F<sub>NaCl</sub> extracts in the NH<sub>4</sub>-N treatment group was greater than in the NO<sub>3</sub>-N treatment group. NO<sub>3</sub>-N led to a greater reduction in photosynthetic pigment content than NH<sub>4</sub>-N. Overall, applying different forms of nitrogen can alleviate Cd toxicity in <i>L. punctata</i>, and the detoxification effect of the NH<sub>4</sub>-N treatment is stronger than that of NO<sub>3</sub>-N treatment. This study will provide theoretical and practical support for the application of duckweed in Cd phytoremediation even in eutrophic aquatic environments.</p>\",\"PeriodicalId\":14235,\"journal\":{\"name\":\"International Journal of Phytoremediation\",\"volume\":\" \",\"pages\":\"2127-2136\"},\"PeriodicalIF\":3.4000,\"publicationDate\":\"2024-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Phytoremediation\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1080/15226514.2024.2377225\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/7/17 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Phytoremediation","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1080/15226514.2024.2377225","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/7/17 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Influence of nitrogen speciation on Cd-induced toxicity in Landoltia punctata.
Nitrogen (N) plays an important role in plant growth and developmental metabolic processes, research on nitrogen speciation regulating Cd accumulation in duckweed is still limited. In this study, the effects of three nitrogen sources (NH4Cl, Ca(NO3)2 and NH4NO3) on the growth, Cd accumulation, and photosynthetic parameters of Landoltia punctata (L.punctata) were analyzed. The results showed that Cd enrichment in L. punctata was significantly reduced (p < 0.05) with different nitrogen treatments compared to the control (CK). Ammonium nitrogen (NH4-N) is more conducive to the accumulation of Cd in L. punctata than nitrate nitrogen (NO3-N). The sum of the cell wall components and soluble components of Cd in the NH4-N treatment group was greater than that in the NO3-N treatment group. The proportion of FNaCl extracts in the NH4-N treatment group was greater than in the NO3-N treatment group. NO3-N led to a greater reduction in photosynthetic pigment content than NH4-N. Overall, applying different forms of nitrogen can alleviate Cd toxicity in L. punctata, and the detoxification effect of the NH4-N treatment is stronger than that of NO3-N treatment. This study will provide theoretical and practical support for the application of duckweed in Cd phytoremediation even in eutrophic aquatic environments.
期刊介绍：
The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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