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王婉婉, 陆镇威, 袁龙义, 江红生. 纳米银对紫萍休眠芽萌发、存活和生长的影响[J]. 植物科学学报, 2022, 40(4): 576-583. DOI: 10.11913/PSJ.2095-0837.2022.40576
引用本文: 王婉婉, 陆镇威, 袁龙义, 江红生. 纳米银对紫萍休眠芽萌发、存活和生长的影响[J]. 植物科学学报, 2022, 40(4): 576-583. DOI: 10.11913/PSJ.2095-0837.2022.40576
Wang Wan-Wan, Lu Zhen-Wei, Yuan Long-Yi, Jiang Hong-Sheng. Effects of silver nanoparticles on dormant bud germination, seedling survival, and growth of Spirodela polyrhiza (L.) Schleid[J]. Plant Science Journal, 2022, 40(4): 576-583. DOI: 10.11913/PSJ.2095-0837.2022.40576
Citation: Wang Wan-Wan, Lu Zhen-Wei, Yuan Long-Yi, Jiang Hong-Sheng. Effects of silver nanoparticles on dormant bud germination, seedling survival, and growth of Spirodela polyrhiza (L.) Schleid[J]. Plant Science Journal, 2022, 40(4): 576-583. DOI: 10.11913/PSJ.2095-0837.2022.40576

纳米银对紫萍休眠芽萌发、存活和生长的影响

Effects of silver nanoparticles on dormant bud germination, seedling survival, and growth of Spirodela polyrhiza (L.) Schleid

  • 摘要: 纳米银(AgNPs)是一种潜在的新型环境污染物,本研究以紫萍(Spirodela polyrhiza (L.) Schleid)休眠芽为实验材料,研究AgNPs对休眠芽萌发率、存活率及叶状体数目、面积和叶绿素含量等指标的影响,并对各项指标的半数效应浓度(EC50)进行比较。结果显示,AgNPs可以抑制紫萍休眠芽的萌发,高浓度(10 mg/L)时可造成休眠芽死亡率显著增加。紫萍休眠芽萌发后叶状体数目和叶状体面积、色素含量均随浓度增加逐渐降低,表现出剂量效应,且叶绿素a对AgNPs最敏感。研究结果表明AgNPs对水生植物紫萍无性繁殖体的萌发和生长都具有抑制作用,具有一定的生态风险。

     

    Abstract: Silver nanoparticles (AgNPs) are an emerging environmental pollutant. In this study, dormant buds of Spirodela polyrhiza were chosen to investigate the effects of AgNPs on germination, survival, and growth of propagules. Results showes that AgNPs inhibited the germination of dormant buds and high concentrations (10 mg/L) even caused death. The number and area of fronds and content of photosynthetic pigments decreased gradually with the increase in concentration after germination of dormant buds and chlorophyll a was the most sensitive parameter to AgNP toxicity. This study showed that AgNPs, as a novel pollutant, have inhibitory effects on the germination and growth of asexual propagules of aquatic plants, and thus exhibit certain ecological risks.

     

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