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1

Leaf gas exchange, source–sink relationship, and growth response of cotton to the interactive effects of nitrogen rate and planting density

100%
Shah A. N., Yang G., Tanveer M., Iqbal J.
Acta Physiologiae Plantarum
|
2017
|
tom 39
|
nr 05
2

Sediment management in East Lake, China: a combined bio-physical and socioeconomic approach for managing sediments in a polluted lake system

100%
Zhu S., Yang G., Dai J.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 4
In large lakes, serious sedimentation and pollution of bottom sediments has occurred in China owing to the neglect of effective protection and management. Thus, sediment management, acting as an important aspect of lake management, should be performed in lake systems. The goal of this study was to determine sediment management framework, and take a physicochemical and socioeconomic approach for sediment management. Sediment quantity and quality analysis was developed, sources of sediment and associated contaminants were analyzed, and management methods such as the ecological water network, source control, and local dredging and sediment treatment were researched respectively. Cost-benefit analysis of chemical-mechanical dewatering and subsequent sediment treatment has been performed as an example. The work in the study was aimed at providing reference for sustainable sediment management of urban lake systems in China.
3

Ecological risks and spatial distributions of heavy metals in beijing atmospheric dust

100%
Wan D., Yang G., Yang J., Zhan C.
Polish Journal of Environmental Studies
|
2018
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tom 27
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nr 2
To investigate ecological risks and spatial distributions of heavy metals in atmospheric particles in the Beijing urban area, atmospheric dust was collected from 62 sites and 12 heavy metals in their <63 μm fractions were measured. Results indicate that V, Cr, Mn, Co, Ni, and Ba in the dust are basically unpolluted by human activities; whereas Cu, Zn, As, Cd, Sb, and Pb are moderately to heavily polluted. These metals (not including Ba) in most dust show a high ecological risk (RI = 809 ±585, ranging 291-4,848), predominantly contributed by Cd (71%) and Sb (14%). Relatively higher risks mainly occur in the eastern and northwestern urban areas. The high risks in the east are caused mainly by Cd pollution associated with coal-burning and industrial and traffic activities, while those in the northwest are caused mainly by Sb pollution associated with point pollution sources and Cd pollution from traffic activity. This is significant for controlling atmospheric heavy metal pollution over the Beijing urban area and investigating atmospheric metal pollution in other cities.
4

Identification of phosphate-starvation-inducible gene BnIPS1 in Brassica napus

88%
Yang G., Du H., Xu H., Ding G., Xu F.
Acta Physiologiae Plantarum
|
2013
|
tom 35
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nr 07
TPSI1/Mt4 family genes are a class of genes induced dramatically by Pi starvation, and are involved in Pi allocation in plants. Its members have been isolated from many plant species, but none has been reported in Brassica napus. Here, we isolated two novel members of TPSI1/Mt4 family from B. napus, which were referred to as BnIPS1;1 and BnIPS1;2. The two genes are 592 and 557 bp long, respectively, and share 91 % sequence identity. They are all intronless, and contain numerous short open reading frames and a conserved 22-nucleotide sequence partially complementary to miR399. Expression analysis revealed that the two genes were induced strongly by Pi starvation and weakly by osmotic stress and salinity. The induction of the two genes is rapid and durative in the absence of Pi and is repressible upon Pi resupply. Furthermore, BnIPS1;1 promoter (-1,459/?42 relative to transcription start site) was isolated and fused to reporter gene GUS. The PBnIPS1;1:GUS construct was introduced into Arabidopsis, and intensive GUS staining was observed in Pi-starved plants. These results further our understanding of TPSI1/Mt4 family genes, and demonstrate that BnIPS1;1 and BnIPS1;2 can be used as tool for investigating Pi-starvation signaling in B. napus and BnIPS1; 1 promoter can be used as inducible promoter for cultivating P-efficient crops.
5

Simulating N2O emission from Kobresia humilis Serg. alpine meadow on Tibetan Plateau with the DNDC model

88%
Du Y., Cui X., Cao G., Zhao X., Yang G.
Polish Journal of Ecology
|
2011
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tom 59
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nr 3
Field me asured N2O emissions in two years were used to parameterize and validate a process-based model, DNDC, for an alpine Kobresia humilis meadow on the Tibetan Plateau in China. Although this model failed to capture the N2O fluxes in some time periods in the spring or autumn, the modeled results showed overall a good performance in terms of simulating the seasonal variation of N2O fluxes and quantifying the annual total emissions. The relative deviation on the annual basis was about 12.4% and –15.9% for the two years, respectively. The modeled data showed that nitrification contributed about 53% of total N2O production, slightly higher than denitrification. The modeled fluxes were sensitive to soil organic content (SOC), pH, and temperature, but less sensitive to variation of precipitation, soil ammonium and nitrate contents. Further mo difications for the model were suggested to focus on the process of soil freezing and thawing as well as the crop growth sub-model that would improve the model’s performance for quantifying N2O emission from the alpine meadow.
6

Macroinvertebrate communities in recovery phase in the middle reaches of Chin's Huaihe River

88%
Chi S.-Y., Zheng J.-X., Yang G., Li M., Hu J.-H.
Polish Journal of Environmental Studies
|
2015
|
tom 24
|
nr 2
After more than 10 years of treatments against water pollution, the water quality of the Huaihe River has improved considerably. At present, the river is in recovery phase. Two surveys on macro-invertebrates were carried out in the middle reaches in May and October 2010. Fifteen sampling stations were set up along the trunk, including Hongze Lake. Thirty-four species were recorded, and poor species and low biodiversity were the main community characteristics of this river. Significant differences in assemblages were found between the trunk and lake. Collectors were the chief functional feeding group in the trunk, while predators were the chief group in the lake. The species number in Hongze Lake decreased considerably compared to the historical data. Total phosphorus and temperature were important factors affecting the distribution of macroinvertebrates in the trunk, while pH, dissolved oxygen, and chlorophyll were the important factors in the lake. Sand mining, industrial and non-point pollution, and urbanization were the important factors causing degradation of whole aquatic ecosystems in the river basin. Two new alien species from the Yangtze River were first recorded in Hongze Lake, and the previous recorded alien species Nephthys sp. has spread into the whole lake and the trunk. Due to having similar histories of water pollution, the Huaihe would experience a process of recovery similar to the Rhine River.
7
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Effects of Neuromedin S on the proliferation of splenic lymphocytes and the cytokine secretion by pulmonary alveolar macrophages in pigs in vitro

88%
Lin R., Wang Q., Qi B., Huang Y., Yang G.
Polish Journal of Veterinary Sciences
|
2016
|
tom 19
|
nr 3
Neuromedin S (NMS), a 36-amino acid neuropeptide, has been found to be involved in the regulation of the endocrine activity. It has been also detected in immune tissues in mammals, what suggests that NMS may play an important role in the regulation of immune response. The aim of this study was to demonstrate the presence of NMS receptor 1 (NMU1R) and effect of NMS in pig splenic lymphocytes (SPLs) and pulmonary alveolar macrophages (PAMs). The presence of NMU1R in pig SPLs and PAMs was respectively confirmed by reverse transcription-polymerase chain reaction (RT-PCR), western blot analysis and immunocytochemical methods. Furthermore, SPL proliferation was analyzed using the 3-(4,5)-dimethyl-thiahiazo-(-2-yl)-3,5-di-phenytetrazoliumromide (MTT) method. Additionally, the secretion of interleukin (IL)-1β, IL-6 and tumor necrosis factor-α (TNF-α) in PAMs was all measured by enzyme-linked immunosorbent assay (ELISA) kits. In the present study, the results of RT-PCR and western blot analysis revealed that NMU1R mRNA and protein were both expressed in pig SPLs and PAMs, and the immunocytochemical investigations further revealed that the positive signal of NMU1R immunoreactivity was observed in plasma membranes of both SPLs and PAMs. In the in vitro study, we found that at concentrations of 0.001-1000 nM NMS alone or combined with lipopolysaccharide or phytohemagglutinin significantly increased SPL proliferation. Application of ELISA method showed that NMS could induce the secretion of the pro-inflammatory cytokines IL-1β, IL-6 and TNF-α in PAMs. These results suggest that NMS can act as a potently positive pro-inflammatory factor and immunomodulatory agent that affects the immune response of immune cells by combining with its receptor NMU1R.
8

Mitochondrial control region variability of baiji and the Yangtze finless porpoises, two sympatric small cetaceans in the Yangtze River

88%
Yang G., Liu S., Ren W., Zhou K., Wei F.
Acta Theriologica
|
2003
|
tom 48
|
nr 4
Baiji Lipotes vexillifer (Miller, 1918) and the Yangtze finless porpoise Neophocaena phocaenoides asiaeorientalis (Pilleri and Gihr, 1972) are two sympatric small cetaceans inhabiting the middle and lower reaches of the Yangtze River. In this study, a fragment (420-428 bp) of the mitochondrial control region was sequenced to provide the first comparative survey of genetic variability and population structure in these two endan­gered species, with samples of finless porpoises from the Yellow/Bohai Sea, East China Sea, and South China Sea also included. Low values of haplotype diversity and nucleotide diversity were found for both species, especially for the baiji and the Yangtze River and South China Sea populations of finless porpoises. The analysis of molecular variance (AMOVA) supported a high level of overall genetic structure among three porpoise populations in Chinese waters, with greatest differences found between either the Yangtze River population or the Yellow Sea population and the South China Sea population. The differentiation between the Yangtze and Yellow Sea populations was not significant, and the males have higher genetic differentiation than the females, suggesting a significant female-biased dispersal between these two populations. This study showed that the Yangtze finless porpoise, unlike the sympatric baiji, was not a genetically isolated population. The Yangtze and Yellow Sea porpoises should be included in the same management unit, but further studies using more samples and especially based on more molecular markers are urgently needed to confirm this.
9

Sitefidelity and association patterns of Indo-Pacific humpback dolphins off the east coast of Zhanjing, China

76%
Xu X., Zhang Z., Ma L., Li P., Yang G., Zhou K.
Acta Theriologica
|
2012
|
tom 57
|
nr 2
This study examined the population of Indo-Pacific humpback dolphins, Sousa chinensis, inhabiting the waters off the east coast of Zhanjiang, China. A total of 116 dolphins were identified during 147 boat-based surveys, completed between June 2005 and June 2007. Abundance estimates indicated that a small population of 268 dolphins (95% CI = 189–413) inhabited this coastal area. The sighting frequencies of identified dolphins varied between one and five when the 2006 and 2007 data were organized into six occasions. Twenty-three percent (27 individuals) of the cataloged dolphins were identified in more than one calendar year. The two animals (ZJ001, ZJ011) with the highest degree of site fidelity were present in the study area for a period of 23 months. The most frequently (15 times) sighted dolphin (ZJ046) was recorded in nine (56%) of the 16 months surveyed. This evidence indicates the interannual site fidelity of S. chinensis to the area off the eastern coast of Zhanjiang City. Range sizes of eight identified individuals calculated by the minimum convex polygon varied from 2.07 to 331.20 km2. Associations between 34 individuals sighted at least three times and more than three times were measured by the half-weight index and SOCPROG program. The majority of these dolphins (80.57%) were not seen together during surveys and the mean association rate between dyads was low at 0.05. Temporal analyses for all the individuals were conducted using a lagged association rate. The results indicated a non-random social structure made by constant companions.
10

GhMAPKKK49, a novel cotton (Gossypium hirsutum L.) MAPKKK gene, is involved in diverse stress responses

76%
Dongdong L., Ming Z., Lili H., Yang G., Xingqi G., Han L.
Acta Physiologiae Plantarum
|
2016
|
tom 38
|
nr 01
11

The intrabody targeting of hTERT attenuates the immortality of cancer cells

76%
Zhu X., Yang N., Cai J., Yang G., Liang S., Ren D.
Cellular and Molecular Biology Letters
|
2010
|
tom 15
|
nr 1
32-45
hTERT (human telomerase reverse transcriptase) plays a key role in the process of cell immortalization. Overexpression of hTERT has been implicated in 85% of malignant tumors and offers a specific target for cancer therapy. In this paper, we describe an effective approach using a single-chain variable fragment (scFv) intrabody derived from monoclonal hybridoma directed against hTERT to attenuate the immortalization of human uterine cervix and hepatoma cells. The scFv we constructed had a high affinity to hTERT, and specifically neutralized over 70% of telomere synthesis activity, thereby inhibiting the viability and proliferation of the cancer cells. Our results indicate that this anti-hTERT intrabody is a promising tool to target hTERT and intervene in the immortalization process of cancer cells.
12

Interactive effect of radioactive and heavy-metal contamination on soil enzyme activity in a former uranium mine

64%
Yang G., Dong F., Liu M., Nie X., Zong M., Peng C., Chen H., Wei H., Wang P., Zhang W.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 3
Radioactivity and heavy metal toxicity of multi-metal deposits coexisting with the element uranium (U) could have long-term adverse impacts on soil biological processes and the health of soil ecosystems. Soil enzyme activities are considered bioindicators for assessing soil health. An experiment was designed to investigate invertase and ß-glucosidase activity in multi-metal deposits. Radioactivity and heavy metals were also investigated during this study. Our results showed that the invertase and ß-glucosidase activities were significantly lower in the core mining area than the control area (p<0.05). Activities of the two enzymes decreased with increasing metal concentrations and radioactivity. Cu and Zn showed significant negative effects on ß-glucosidase and invertase activities in a multi-metal deposit at the study site. A significant nonlinear relationship was recorded between soil enzyme activities, radiation dose (R² = 0.71, 0.63; p<0.05), Zn (R² = 0.34, 0.41; p<0.05) and Cu concentrations (R² = 0.46, 0.45; p<0.05). There were turning points at 1 μGy h⁻¹, 250 μg g⁻¹, and 30 μg g⁻¹ for radiation dose, Zn and Cu contents, respectively. The findings could provide more information regarding the toxic effects of radiation and heavy metals on the soil health of multi-metal deposits, which can more precisely guide environmental protection.
13

Soil nematode trophic groups in four different plantations in southern China: implications for restoration

64%
Zhao C., Sun F., Yu C., Zhu L., Li Y., Zhou Z., Yang G., Wang W., Miao R.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 3
Intensive anthropogenic disturbances have caused forest ecosystem degradation and soil erosion. Exotic fast-growing species are selected as pioneer species for restoration in degraded hilly lands of southern China. To better understand the potentials of the soil nematode trophic group composition in carbon sequestration, we investigated nematode trophic groups in Acacia, Eucalyptus, and Schima (native species as control) monoculture plantations in southern China after 23 years of reforestation. Our results showed that although total soil nematode abundance was not affected, the Acacia plantation significantly altered nematode trophic group composition over native species. Bacterivore and microbivore abundance, trophic diversity, and microbivore-driven soil organic carbon storage were higher in Acacia mangium than Schima superba. In contrast, plant parasitic nematode abundance and fungivore/bacterivore ratio were lower in Acacia mangium than Schima superba. As a result, Acacia mangium as a fast-growing pioneer tree species could be widely planted to maintain soil biodiversity and store carbon in restoring degraded forests in southern China. Eucalyptus exserta plantation enlarged the soil nematode community, including bacterivores, fungivores, and herbivores, suggesting that there is almost no allelopathy when eliminating anthropogenic disturbance in this study. Reasonable management is crucial for providing timber products and improving the ecological function of Eucalyptus plantations. Our results also highlight the critical roles of soil water and nutrient availability in regulating soil nematode trophic group composition and carbon sequestration.
14

Characterization of arsenic and uranium pollution surrounding a uranium mine in southwestern China and phytoremediation potential

52%
Li R., Dong F., Yang G., Zhang W., Zong M., Nie X., Zhou L., Babar A., Liu J., Ram B. K., Fan C., Zeng Y.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 1
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