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食用蔬菜能吸收和积累微塑料 期刊论文 OAI收割
科学通报, 2019, 卷号: 64, 期号: 9, 页码: 928-934
作者: 李连祯; 周倩; 尹娜; 涂晨; 骆永明

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微塑料生菜聚苯乙烯微球吸收积累健康风险 microplastics lettuce polystyrene microbeads uptake accumulation human health risk Microplastic (MP, 100 nm-5 mm) may present an attributable risk to ecosystem and human health, and its pollution has become a global environmental concern. Despite a wealth of information on the accumulation of MPs in aquatic species, there is no information on the uptake and accumulation of MPs by higher plants. Terrestrial edible plants are directly exposed to MPs when agricultural soil was applied with organic manure, sewage sludge as fertilizer or plastic mulching. In this paper, the uptake of two sizes of polystyrene (PS) microbeads (0.2 and 1.0 mum) and then their distribution and migration in an edible plant lettuce were firstly investigated based on laboratory experiments. We used fluorescent markers to track PS microbeads in plant tissues and found fluorescence to be a sensitive and reliable detection method. Sections from untreated control lettuce showed no autofluorescence. When roots were treated with fluorescently labeled PS microbeads, the microbeads could be identified by its fluorescence. Our main study investigated the uptake of 0.2 mum beads, as few luminescence signals were observed in lettuce roots for 1.0 mum beads in our experiment. We observed that 0.2 mum fluorescent microbeads were extracellularly trapped in the root cap mucilage (which is a highly hydrated polysaccharide) and a dark green tip (which was typical of lettuce roots exposed to label PS beads) was usually visible to the naked eye. Confocal images revealed that the PS luminescence signals were mainly located in the vascular system and on the cell walls of the cortex tissue of the roots, indicated that the beads passed through the intercellular space via the apoplastic transport system. Once inside the central cylinder, the 0.2 mum PS beads were transferred from the roots to the stems and leaves via the vascular system following the transpiration stream. We also observed that the PS beads adhered to one another and self-assembled systematically into grape-like and (chain) string-like clusters in the intercellular space of the root and stem vascular tissue of lettuce plant. In contrast to the root and stem, PS beads were dispersed in the leaf tissue. Here, for the first time we provide evidence of the adherence, uptake, accumulation, and translocation of submicrometer MPs within an edible plant. Our findings highlight the previously underappreciated human exposure pathway to MPs through the consumption of contaminated crops and emphasize the need for new management strategies to control the release of MPs waste products into the terrestrial environment. Ultimately, the potential impacts of low range sized MPs on food safety of crop plants and human health need to be urgently considered.

An aquaporin PvTIP4;1 from Pteris vittata may mediate arsenite uptake 期刊论文 OAI收割
NEW PHYTOLOGIST, 2016, 卷号: 209, 期号: 2, 页码: 746-761
作者: He, Zhenyan; Yan, Huili; Chen, Yanshan; Shen, Hongling; Xu, Wenxiu

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aromatic/arginine (Ar/R) arsenic (As) arsenite (As(III)) aquaporin Pteris vittata PvTIP4 1 uptake

Arsenic accumulation and speciation in the submerged macrophyte Ceratophyllum demersum L. 期刊论文 OAI收割
Environmental Sciences & Ecology, 2012, 卷号: 19, 期号: 9, 页码: 3969-3976
作者: Sun, Guoxin

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Arsenic Arsenic speciation Submerged macrophytes Efflux Uptake As phytofiltration

Arsenic accumulation by the aquatic fern Azolla: Comparison of arsenate uptake, speciation and efflux by A. caroliniana and A. filiculoides 期刊论文 OAI收割
ENVIRONMENTAL POLLUTION, 2008, 卷号: 156, 期号: 3, 页码: 1149-1155
作者: Xu, Guo-Zhong; Lin, Ai-Jun; Zhao, Fang-Jie; Zhang, Xin; Zhu, Yong-Guan

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Arsenic As Speciation As Tolerance As Uptake Azolla Accumulation Detoxification

Potential of Pteris vittata L. for phytoremediation of sites co-contaminated with cadmium and arsenic: The tolerance and accumulation SCI/SSCI论文 OAI收割
2008
作者: Lei M.

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arsenic (As) cadmium (Cd) Chinese brake (Pteris vittata L.) hyperaccumulator phytoremediation tolerance uptake thlaspi-caerulescens heavy-metals soil zinc populations copper plant lead

Potential of Pteris vittata L. for phytoremediation of sites co-contaminated with cadmium and arsenic: The tolerance and accumulation 期刊论文 OAI收割
JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA, 2008, 卷号: 20, 期号: 1, 页码: 62-67
作者: Chen Tongbin(陈同斌); Lei Mei; Liao Xiaoyong

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arsenic (As) cadmium (Cd) Chinese brake (Pteris vittata L.) hyperaccumulator phytoremediation tolerance uptake

Arsenic uptake and transport of Pteris vittata L. as influenced by phosphate and inorganic arsenic species under sand culture 期刊论文 OAI收割
JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA, 2007, 卷号: 19, 期号: 6, 页码: 714-718
作者: Lei Mei; Liao Xiao-yong

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arsenate arsenite As species Pteris vittata L. phosphate transport uptake

Arsenic uptake and transport of Pteris vittata L. as influenced by phosphate and inorganic arsenic species under sand culture SCI/SSCI论文 OAI收割
2007
作者: Lei M.

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arsenate arsenite As species Pteris vittata L. phosphate transport uptake hyperaccumulator accumulation phosphorus speciation metabolism fronds brake exafs soils fern

Arsenate (As) uptake by and distribution in two cultivars of winter wheat (Triticum aestivum L.) 期刊论文 OAI收割
CHEMOSPHERE, 2006, 卷号: 62, 期号: 4, 页码: 608-615
作者: Smith, FA; Smith, SE; Tong, YP; Zhu, YG; Geng, CN

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Triticum Aestivum Arsenic (As) p Efficiency As Uptake As Distribution

磷对高等植物砷的吸收代谢影响机理的研究 学位论文 OAI收割
博士, 北京: 中国科学院研究生院, 2004
耿春女

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As(V)-P (V)交互作用小麦水稻吸收积累急性毒性 As(V)-P(V) interaction uptake accumulation Triticum aestivum Oryza sativa acute toxicity.