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北京大学 [28]
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Biomarker evidence for deforestation across the Triassic-Jurassic boundary in the high palaeolatitude Junggar Basin, northwest China
期刊论文
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 2022, 卷号: 600, 页码: 9
作者:
Zhang, Xiaoyu
;
Lv, Peizong
;
Fang, Linhao
;
Wang, Guangli
;
Lu, Yuanzheng
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  |  
浏览/下载:36/0
  |  
提交时间:2022/07/20
End-Triassic mass extinction
Terrestrial
Wildfire
Higher plants biomarkers
Fern spikes
Comparison of different chain n-fatty acids in modern plants on the Loess Plateau of China
期刊论文
FRONTIERS OF EARTH SCIENCE, 2020, 页码: 10
作者:
Liu, Jinzhao
;
An, Zhisheng
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浏览/下载:107/0
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提交时间:2020/06/05
n-fatty acids
terrestrial higher plants
Chinese Loess Plateau
食用蔬菜能吸收和积累微塑料
期刊论文
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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  |  
浏览/下载:63/0
  |  
提交时间:2020/06/17
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.
Chloroplast genome sequence of an endangered non-photosynthetic mycoheterotrophic species Monotropastrum sciaphilum (Andres) G. D. Wallace
期刊论文
CONSERVATION GENETICS RESOURCES, 2018, 卷号: 10, 期号: 4, 页码: 797-799
作者:
Zhao, Qian-Ru
;
Liu, Zhen-Wen
;
Shi, Chao
;
Peng, Hua
;
Lu, Shu-Gang
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  |  
浏览/下载:192/0
  |  
提交时间:2019/03/18
M. sciaphilum
Chloroplast genome
Non-photosynthetic plants
China Biodiversity Red List-Higher Plants
Functional characterization of the late embryogenesis abundant (LEA) protein gene family from Pinus tabuliformis (Pinaceae) in Escherichia coli
期刊论文
SCIENTIFIC REPORTS, 2016, 卷号: 6, 期号: 19467
Gao Jie
;
Lan Ting
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  |  
浏览/下载:152/0
  |  
提交时间:2016/02/15
ARABIDOPSIS-THALIANA
SACCHAROMYCES-CEREVISIAE
DESICCATION TOLERANCE
SALT TOLERANCE
WATER-DEFICIT
ABSCISIC-ACID
HIGHER-PLANTS
MAIZE DHN1
EXPRESSION
DEHYDRINS
The Red Light Receptor Phytochrome B Directly Enhances Substrate-E3 Ligase Interactions to Attenuate Ethylene Responses
期刊论文
DEVELOPMENTAL CELL, 2016
Shi, Hui
;
Shen, Xing
;
Liu, Renlu
;
Xue, Chang
;
Wei, Ning
;
Deng, Xing Wang
;
Zhong, Shangwei
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  |  
浏览/下载:10/0
  |  
提交时间:2017/12/03
SIGNAL-TRANSDUCTION
HIGHER-PLANTS
ARABIDOPSIS-THALIANA
MEDIATED DEGRADATION
TRANSCRIPTION FACTOR
SEED-GERMINATION
PROTEIN
SEEDLINGS
NUCLEAR
EIN2
Fractionation of Stable Cadmium Isotopes in the Cadmium Tolerant Ricinus communis and Hyperaccumulator Solanum nigrum
SCI/SSCI论文
2016
作者:
Wei R. F.
;
Guo, Q. J.
;
Wen, H. J.
;
Liu, C. Q.
;
Yang, J. X.
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  |  
浏览/下载:38/0
  |  
提交时间:2017/11/09
higher-plants
precise determination
primary productivity
cd-hyperaccumulator
river sediments
zinc isotopes
lead isotopes
alpine plants
accumulation
soil
Fractionation of Stable Cadmium Isotopes in the Cadmium Tolerant Ricinus communis and Hyperaccumulator Solanum nigrum
SCI/SSCI论文
2016
作者:
Wei R. F.
;
Guo, Q. J.
;
Wen, H. J.
;
Liu, C. Q.
;
Yang, J. X.
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  |  
浏览/下载:16/0
  |  
提交时间:2016/12/16
higher-plants
precise determination
primary productivity
cd-hyperaccumulator
river sediments
zinc isotopes
lead isotopes
alpine plants
accumulation
soil
Three-phase probabilistic load flow for power system with correlated wind, photovoltaic and load
期刊论文
IET GENERATION TRANSMISSION & DISTRIBUTION, 2016, 卷号: 10, 期号: 12
作者:
Ran, Xiaohong
;
Miao, Shihong
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  |  
浏览/下载:2/0
  |  
提交时间:2019/12/05
photovoltaic power systems
wind power plants
higher order statistics
Monte Carlo methods
load flow
power distribution
power system performance
wind power generation
photovoltaic generation
PV generation
bus load
adjacent wind farms
PV resources
three-phase probabilistic load flow algorithm
asymmetric line parameter
unbalanced load
input random variable
joint correlation
joint probabilistic model
joint cumulant method
Gram-Charlier expansion
cumulative distribution function
Monte Carlo simulation
renewable energy generation penetration
25-bus distribution system
Response of root morphology, physiology and endogenous hormones in maize (Zea mays L.) to potassium deficiency
期刊论文
JOURNAL OF INTEGRATIVE AGRICULTURE, 2016, 卷号: 15, 期号: 4, 页码: 785-794
作者:
Zhao Xinhue
;
Yu Haiqiu
;
Wen Jing
;
Wang Xiaoguang
;
Du Qi
收藏
  |  
浏览/下载:68/0
  |  
提交时间:2021/02/02
LOW PHOSPHORUS AVAILABILITY
ARABIDOPSIS-THALIANA
MAGNESIUM-DEFICIENCY
OXIDATIVE STRESS
HIGHER-PLANTS
BEAN-PLANTS
ARCHITECTURE
EFFICIENCY
TOLERANCE
GROWTH
potassium deficiency
maize
root morphology
physiological variation
endogenous hormone
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