Cumulative potential of Lactuca sativa L. and physiological and anatomical damage when exposed to lead

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Antonio Rodrigues da Cunha Neto, Tainara Bettiol Westin, Alexandra dos Santos Ambrósio, João Vitor Barbosa Calvelli, Breno Régis Santos, Thiago Corrêa de Souza, Marília Carvalho, Sandro Barbosa
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Abstract

The objective of this study was to investigate the effect of lead on the cultivation of Lactuca sativa L. in a hydroponic system, elucidating the effects of lead on physiological processes, anatomy, and its bioaccumulation capacity. Lettuce plants were grown in a greenhouse under a hydroponic system containing lead nitrate (50, 100, 250, 500 μM), with Hoagland solution as a negative control, for a period of 42 to 70 days. Plant height, number of leaves, fresh and dry matter, leaf area, chloroplastic pigments, chlorophyll fluorescence, anatomical parameters, and lead content were evaluated. The results demonstrated that growth parameters were affected according to lead concentration. The 500-μM concentration caused the greatest reduction in stem height (30.28%) and leaf area (88.07%). A significant decrease in the number of leaves, ranging from 20 to 90.47%, was observed at all concentrations on the 70th day. Chloroplastic pigment content was statistically reduced at all concentrations, reflecting a sharp decline of 58.82% in the photochemical quenching and 45.22% in the vitality index. The root morpho-anatomy was also altered, with the proportion of vascular bundle area decreasing by 43.50% and a 501.47% increase in aerenchyma formation. Lead accumulation in the roots was 21.54 times higher at the highest concentration compared to the lowest, highlighting the cumulative potential of this organ, while the metal was not detected in the aerial part, indicating the absence of translocation. Despite the negative effects on biomass and physiological parameters, Lactuca sativa L. demonstrated tolerance to lead and potential for rhizofiltration, making it a promising candidate for application in hydroponic systems aimed at treating contaminated wastewater.

铅对油菜累积电位及生理解剖损伤的影响。
摘要本研究旨在探讨铅对水培体系下芥蓝栽培的影响,阐明铅对芥蓝生理过程、解剖结构及其生物蓄积能力的影响。生菜在温室中,在含硝酸铅(50、100、250、500 μM)的水培系统中生长,以霍格兰溶液为阴性对照,生长42 ~ 70天。测定植株高度、叶片数量、鲜干物质、叶面积、叶绿体色素、叶绿素荧光、解剖参数和铅含量。结果表明,铅浓度对生长参数有影响。500 μ m浓度对茎高和叶面积的影响最大,分别为30.28%和88.07%。在处理第70 d时,各浓度处理的叶片数量均显著减少,减少幅度为20% ~ 90.47%。在所有浓度下,叶绿体色素含量均有统计学意义上的降低,反映出光化学猝灭率急剧下降58.82%,活力指数急剧下降45.22%。根的形态解剖结构也发生了变化,维管束面积比例减少了43.50%,气孔形成比例增加了501.47%。在最高浓度下,铅在根系的累积量是最低浓度下的21.54倍,突出了该器官的累积潜力,而在地上部分未检测到金属,表明没有易位。尽管对生物量和生理参数有负面影响,但油菜对铅的耐受性和根茎过滤的潜力,使其成为处理污染废水的水培系统的有希望的候选人。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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