Geological Research Center for Agricultural Applications

Hangzhou, China

Geological Research Center for Agricultural Applications

Hangzhou, China

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Li R.,Zhejiang University | Liu J.-W.,Zhejiang University | Hong C.-L.,Zhejiang Academy of Agricultural Sciences | Zhou J.,Zhejiang University | And 4 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2017

The contents of major elements and micronutrients of the kelps, macroalgaes produced in the Bohai Sea, the Yellow Sea, the East China Sea, and the South China Sea, were respectively determinated. Their differences in nutrient contents between regions were compared,and their ability to eliminate the excessive nitrogen and phosphorus in sea waters were analyzed. The results showed that the concentrations of nitrogen, phosphorus and iodine in the kelp were respectively 9.8×104 times, 2.0×105 times, and 5.8×104 times higher than that in the sea water. Meanwhile, the organic iodine fertilizer made from the kelp was applied to cultivate iodine-rich vegetables, and their iodine content could reach to about 10 times higher than the unfertilized controls. The biogeochemical process of using exogenous iodine to improve the iodine deficiency in the soil was revealed. At last, a kelp-based potential model to repair the ecological environment is established, which can link the remediation of eutrophic sea waters and the improvement of inland environment of iodine deficiency. The solution may provide a technical route to establish an environment-friendly iodine industry chain, including large-scale cultivation of kelps, extraction of biomass energy from kelp fermentation, manufacture of organic iodine fertilizer, cultivation of iodine-rich plant foods, and so on. © 2017, Editorial Board of China Environmental Science. All right reserved.


Shao Y.,Wuhan University | Shao Y.,Geological Research Center for Agricultural Applications | Wang Y.,Wuhan University | Xu X.,China Power Engineering Consulting Group Corporation | And 4 more authors.
Science of the Total Environment | Year: 2014

The concentration and spatial distribution of polycyclic aromatic hydrocarbons (PAHs) in topsoil, groundwater and groundwater suspended solids (SS) at Guozhuang karst water system of northern China were investigated. The total concentration of PAHs ranged from 622 to 87,880. ng/g dry weight in topsoil, from 4739 to 59,314. ng/g dry weight in SS, and from 2137 to 9037. ng/L in groundwater, with mean values of 17,174. ng/g, 11,990. ng/g and 5020. ng/L, respectively. High concentrations of PAHs were mainly observed in the coal mining industrial area and the discharge area. The composition of PAHs indicated that low molecular weight PAHs were predominant in groundwater samples, the content of medium molecular weight PAHs was elevated in SS, and carcinogenic high molecular weight PAHs were frequently detected in topsoil. The high contents of low-medium molecular weight PAHs in groundwater and SS suggested relatively recent local sources of PAHs that were transported into the aquifer via leakage of contaminated surface water and/or infiltration of PAH-containing precipitation. The results of evaluating sources of PAHs using ratios of specific PAH compounds showed that PAHs mainly originated from coal and wood combustion. Furthermore, five sources were identified by positive matrix factorization (PMF) model, and the contribution to the total loadings of groundwater PAHs were: 2% for unburnt oil, 32% for coal combustion, 22% for vehicle emission, 27% for biomass combustion and 18% for coke production, respectively. Furthermore, strong correlations of total PAHs with total organic carbon (TOC) in topsoil indicated co-emission of PAHs and TOC. Poor correlations of PAHs with dissolved organic carbon (DOC) in groundwater indicated that other factors exert stronger influences. Therefore, PAHs might have posed a major threat to the quality of potable groundwater in Guozhuang karst water system. © 2014.


Shao Y.,Wuhan University | Shao Y.,Geological Research Center for Agricultural Applications | Wang Y.,Wuhan University | Wu X.,Wuhan University | And 6 more authors.
Environmental Earth Sciences | Year: 2015

A bacterial strain Acinetobacter sp. WSD with phenanthrene-degrading ability was identified based on biochemical tests and 16S rDNA gene sequence analysis. The strain was isolated from polycyclic aromatic hydrocarbons (PAHs)-contaminated groundwater from a coal-mining area of the Guozhuang karst water system in Shanxi province of northern China. Acinetobacter sp. WSD could utilize fluorine (FLO), phenanthrene (PHE) and pyrene (PYR) as its sole carbon source and was able to degrade other PAHs. Approximately 90 % of FLO, 90 % of PHE and 50 % of PYR were degraded after 6 days’ incubation. The logistic model well fitted all the experimental data. The specific degradation rates in glucose were higher than that in HCO3 −, indicating that organic carbon source promoted the growth of Acinetobacter sp. WSD and the degradation of PAHs. In presence of humic acids (HA), the total degradation rate was accelerated, although there was a delay at the beginning. In the case of high HA concentration, co-metabolism between PAHs and HA occurred. The metabolic pathway for the three compounds of PAHs was discussed using GC–MS data. Phthalic acid was found in their metabolites. Phenol, 2,5-bis(1,1-dimethylethyl), a new type of PAHs metabolites that have been reported before was found after 2 days degradation. © 2015, Springer-Verlag Berlin Heidelberg.


Li M.-Q.,Zhejiang University | Hasan M.K.,Zhejiang University | Li C.-X.,Zhejiang University | Ahammed G.J.,Zhejiang University | And 14 more authors.
Journal of Pineal Research | Year: 2016

Both selenium (Se) and melatonin reduce cadmium (Cd) uptake and mitigate Cd toxicity in plants. However, the relationship between Se and melatonin in Cd detoxification remains unclear. In this study, we investigated the influence of three forms of Se (selenocysteine, sodium selenite, and sodium selenate) on the biosynthesis of melatonin and the tolerance against Cd in tomato plants. Pretreatment with different forms of Se significantly induced the biosynthesis of melatonin and its precursors (tryptophan, tryptamine, and serotonin); selenocysteine had the most marked effect on melatonin biosynthesis. Furthermore, Se and melatonin supplements significantly increased plant Cd tolerance as evidenced by decreased growth inhibition, photoinhibition, and electrolyte leakage (EL). Se-induced Cd tolerance was compromised in melatonin-deficient plants following tryptophan decarboxylase (TDC) gene silencing. Se treatment increased the levels of glutathione (GSH) and phytochelatins (PCs), as well as the expression of GSH and PC biosynthetic genes in nonsilenced plants, but the effects of Se were compromised in TDC-silenced plants under Cd stress. In addition, Se and melatonin supplements reduced Cd content in leaves of nonsilenced plants, but Se-induced reduction in Cd content was compromised in leaves of TDC-silenced plants. Taken together, our results indicate that melatonin is involved in Se-induced Cd tolerance via the regulation of Cd detoxification. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd


PubMed | University of Texas Health Science Center at San Antonio, Geological Research Center for Agricultural Applications and Zhejiang University
Type: Journal Article | Journal: Journal of pineal research | Year: 2016

Both selenium (Se) and melatonin reduce cadmium (Cd) uptake and mitigate Cd toxicity in plants. However, the relationship between Se and melatonin in Cd detoxification remains unclear. In this study, we investigated the influence of three forms of Se (selenocysteine, sodium selenite, and sodium selenate) on the biosynthesis of melatonin and the tolerance against Cd in tomato plants. Pretreatment with different forms of Se significantly induced the biosynthesis of melatonin and its precursors (tryptophan, tryptamine, and serotonin); selenocysteine had the most marked effect on melatonin biosynthesis. Furthermore, Se and melatonin supplements significantly increased plant Cd tolerance as evidenced by decreased growth inhibition, photoinhibition, and electrolyte leakage (EL). Se-induced Cd tolerance was compromised in melatonin-deficient plants following tryptophan decarboxylase (TDC) gene silencing. Se treatment increased the levels of glutathione (GSH) and phytochelatins (PCs), as well as the expression of GSH and PC biosynthetic genes in nonsilenced plants, but the effects of Se were compromised in TDC-silenced plants under Cd stress. In addition, Se and melatonin supplements reduced Cd content in leaves of nonsilenced plants, but Se-induced reduction in Cd content was compromised in leaves of TDC-silenced plants. Taken together, our results indicate that melatonin is involved in Se-induced Cd tolerance via the regulation of Cd detoxification.


Guo B.,Zhejiang Academy of Agricultural Sciences | Guo B.,Geological Research Center for Agricultural Applications | Liu C.,Zhejiang Academy of Agricultural Sciences | Ding N.,Zhejiang Academy of Agricultural Sciences | And 4 more authors.
Journal of Plant Growth Regulation | Year: 2015

The aim of this work was to investigate the effect of silicon (Si) on phenolic exudation of plant roots and cadmium (Cd) bioavailability in rhizospheres. For this purpose, pot experiments with two cypress varieties, Juniperus chinensis and Platycladus orientalis, each subjected to 100 mg kg−1 Cd and/or 400 mg kg−1 Si for 220 days, were conducted using a rhizobag technique. The results showed that P. orientalis accumulated a higher amount of Cd, hence caused higher growth inhibition on the leaves compared with J. chinensis. Si alleviated the growth inhibition induced by Cd toxicity on both varieties, but the mechanisms involved were species specific. For J. chinensis, Si did not affect the root exudation but enhanced the Cd retention of the roots by strengthening the exodermis tissues, restraining Cd translocation from the roots to the shoots. For P. orientalis, Si exposure significantly elevated the phenolic exudation (for example, ferulic acid, catechin, and gallic acid) of the roots, which caused greater Cd mobility in the rhizosphere and enhancement of Cd accumulation in the shoots compared with Cd treatment alone. These results suggest that Cd-chelating with the Si-induced phenolics in the rhizosphere is involved in the Cd detoxification in P. orientalis. © 2015 Springer Science+Business Media New York


Hasan M.K.,Zhejiang University | Liu C.,Zhejiang University | Wang F.,Zhejiang University | Ahammed G.J.,Zhejiang University | And 7 more authors.
Chemosphere | Year: 2016

Glutathione (GSH) plays a critical role in plant growth, development and responses to stress. However, the mechanism by which GSH regulates tolerance to cadmium (Cd) stress still remains unclear. Here we show that inhibition of GSH biosynthesis by buthionine sulfoximine (BSO) aggravated Cd toxicity by increasing accumulation of reactive oxygen species (ROS) and reducing contents of nitric oxide (NO) and S-nitrosothiol (SNO) in tomato roots. In contrast, exogenous GSH alleviated Cd toxicity by substantially minimizing ROS accumulation and increasing contents of NO and SNO, and activities of antioxidant enzymes that eventually reduced oxidative stress. GSH-induced enhancement in Cd tolerance was closely associated with the upregulation of transcripts of several transcription factors such as ETHYLENE RESPONSIVE TRANSCRIPTION FACTOR 1 (ERF1), ERF2, MYB1 TRANSCRIPTION FACTOR- AIM1 and R2R3-MYB TRANSCRIPTION FACTOR- AN2, and some stress response genes. In addition, GSH modulated the cellular redox balance through maintaining increased GSH: GSSG and AsA: DHA ratios, and also increased phytochelatins contents. Nonetheless, GSH-induced alleviation of Cd phytotoxicity was also associated with increased sequestration of Cd into cell walls and vacuoles but not with Cd accumulation. Under Cd stress, while treatment with BSO slightly decreased vacuolar fraction of Cd, combined treatment with BSO and GSH noticeably increased that fraction. Our results suggest that GSH increases tomato tolerance to Cd stress not only by promoting the chelation and sequestration of Cd but also by stimulating NO, SNO and the antioxidant system through a redox-dependent mechanism. © 2016


Yin H.-Q.,Zhejiang Institute of Geological Survey | Yin H.-Q.,Geological Research Center for Agricultural Applications | Jian Z.-H.,Zhejiang Institute of Geological Survey | Jian Z.-H.,Geological Research Center for Agricultural Applications | And 4 more authors.
Journal of Ecology and Rural Environment | Year: 2013

Samples were collected of soils from the plow layers of the major Chinese medicinal herbs production areas in Jinhua and of the Chinese medicinal herbs produced therein for analysis of heavy metal contents and causes of their overproof rates from the environmental geochemical aspect. Results show that the Cd overproof rate in Rhizoma Atractylodis Macrocephalae, Radix Scrophulariae and Bulbus Fritillariae Thunbergii is 64. 3%, 40. 0% and 47. 2%, respectively, and the Cu overproof rate in Rhizoma Atractylodis Macrocephalae, Radix Scrophulariae and Rhizoma Corydalis is 35.7%, 10. 0% and 5. 9%, respectively. It was found through studies on the characteristics of Chinese medicinal herbs selectively absorbing certain heavy metal elements, soil environment of the herb growing areas, topographic and climatic conditions that the warm humid climate, steep terrain, strong eluviation in the process of pedogenesis through weathering of rocks, decreasing pH from soil parent material, eluvial horizon to plough layer and soil acidification are the major causes leading to overproof Cu and Cd in the Chinese medicinal herbs.

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