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Jeng-Yan Su, Chien-Hui Syu, Dar-Yuan Lee
Limited information exists on the effects of emerging contaminants gallium (Ga) and indium (In) on rice plant growth. This study investigated the effects on growth and uptake of Ga and In by rice plants grown in soils with different properties. Pot experiment was conducted and the rice seedlings were grown in two soils of different pH (Pc and Cf) spiked with various Ga and In concentrations. The results showed concentrations of Ga, In, and Al in soil pore water increased with Ga- or In-spiking in acidic Pc soils, significantly decreasing growth indices...
October 12, 2017: Journal of Hazardous Materials
Antoine Pierart, Camille Dumat, Arthur QuyManh Maes, Nathalie Sejalon-Delmas
1. CONTEXT: Urban areas are often contaminated with various forms of persistent metal (loid) and emerging contaminants such as antimony (Sb). Thus, in the context of urban agriculture where sustainable practices such as biofertilizers application (arbuscular mycorrhizal fungi, AMF) could improve nutrient transfer from the soil to the vegetables, the effect of AMF on metal (loid) mobility and human bioaccessibility is still poorly known. 2. METHODS: The role of AMF in Sb uptake by lettuce and carrot grown in artificial substrate spiked with different Sb chemical species was investigated...
October 10, 2017: Chemosphere
Jie Wang, Xiaoling Dun, Jiaqin Shi, Xinfa Wang, Guihua Liu, Hanzhong Wang
As the major determinant for nutrient uptake, root system architecture (RSA) has a massive impact on nitrogen use efficiency (NUE). However, little is known the molecular control of RSA as related to NUE in rapeseed. Here, a rapeseed recombinant inbred line population (BnaZNRIL) was used to investigate root morphology (RM, an important component for RSA) and NUE-related traits under high-nitrogen (HN) and low-nitrogen (LN) conditions by hydroponics. Data analysis suggested that RM-related traits, particularly root size had significantly phenotypic correlations with plant dry biomass and N uptake irrespective of N levels, but no or little correlation with N utilization efficiency (NUtE), providing the potential to identify QTLs with pleiotropy or specificity for RM- and NUE-related traits...
2017: Frontiers in Plant Science
Hossain M Anawar, Zed Rengel, Paul Damon, Mark Tibbett
High arsenic (As) concentrations in the soil, water and plant systems can pose a direct health risk to humans and ecosystems. Phosphate (Pi) ions strongly influence As availability in soil, its uptake and toxicity to plants. Better understanding of As(V)-Pi interactions in soils and plants will facilitate a potential remediation strategy for As contaminated soils, reducing As uptake by crop plants and toxicity to human populations via manipulation of soil Pi content. However, the As(V)-Pi interactions in soil-plant systems are complex, leading to contradictory findings among different studies...
October 12, 2017: Environmental Pollution
Xiaoyong Liao, Zeying Wu, Xu Ma, Xuegang Gong, Xiulan Yan
In order to illuminate the mechanism of the interaction of polycyclic aromatic hydrocarbon (PAH) with different benzene rings and arsenic (As) in As hyperaccumulator, Pteris vittata L., the uptakes of PAHs were investigated using hydroponics simulation and localizations of PAHs in the plant were determined using two-photon laser scanning confocal microscopy (TPLSCM). The results showed that the total As concentration in different parts of P. vittata decreased in the presence of PAHs with increased numbers of benzene rings: 38...
October 12, 2017: Environmental Science and Pollution Research International
Ok Ran Lee, Ngoc Quy Nguyen, Kwang Ho Lee, Young Chang Kim, Jiho Seo
BACKGROUND: Both Panax ginseng Meyer and Panax quinquefolius are obligate shade-loving plants whose natural habitats are broadleaved forests of Eastern Asia and North America. Panax species are easily damaged by photoinhibition when they are exposed to high temperatures or insufficient shade. In this study, a cytohistological study of the leaf structures of two of the most well-known Panax species was performed to better understand the physiological processes that limit photosynthesis...
October 2017: Journal of Ginseng Research
Shimpei Uraguchi, Nobuhiro Tanaka, Christian Hofmann, Kaho Abiko, Naoko Ohkama-Ohtsu, Michael Weber, Takehiro Kamiya, Yuka Sone, Ryosuke Nakamura, Yasukazu Takanezawa, Masako Kiyono, Toru Fujiwara, Stephan Clemens
Phytochelatin (PC) synthesis has been well demonstrated as a major metal tolerance mechanism in Arabidopsis thaliana, whereas its contribution to long-distance element transport especially in monocots remains elusive. Using rice as a cereal model, we examined physiological roles of OsPCS1 in the distribution and detoxification of arsenic (As) and cadmium (Cd), two toxic elements associated with major food safety concerns. First, we isolated four different transcript variants of OsPCS1 as well as one from OsPCS2...
August 14, 2017: Plant & Cell Physiology
Bing-Lin Zhang, You-Nan Ouyang, Jun-Ying Xu, Ke Liu
The remobilization of cadmium (Cd) from shoots to grain is the key process to determine the Cd accumulation in grain. The apoplastic pH of plants is an important factor and signal in influencing on plant responding to environmental variation and inorganic elements uptake. It is proposed that pH of rice plants responds and influences on Cd remobilization from shoots to grain when rice is exposed to Cd stress. The results of hydroponic experiment showed that: pH of the rice leaf vascular bundles among 3 cultivars was almost increased, pH value of 1 cultivar was slightly increasing when rice plants were treated with Cd...
October 2, 2017: Ecotoxicology and Environmental Safety
Teng-Fei Fan, Ming-Jie He, Chang-Jun Li, Dong-Xue Shi, Chao Yang, Yi-Yin Chen, Ji Ke, Yu-Xia Chen, Lei Zhang, Di-Qin Li, Lai-Hua Liu, Chen Xu
K326 and HD represent major tobacco cultivars in China, which required a large nitrogen (N)-fertilizer input but with different application rates. To understand primary components affecting tobacco N-use physiology, we adopted these two varieties as valuable genetic materials to assess their growth response to N nutrition. We established a hydroponic-culture system to grow plants supplied with different N regimes. Plant biomass, nitrogen, ammonium, nitrate, arginine, GS and NR activity, N transfer- and use-efficiency as well as root uptake were examined...
October 6, 2017: Plant Biology
Aleksandra Bawiec, Katarzyna Pawęska, Krzysztof Pulikowski
The aim of the study was to determine the changes in suspension particle size identified in biologically treated wastewater, which was then treated in hydroponic system with use of engineering lighting by the light-emitting diodes (LED). The study was subjected to wastewater purified under laboratory conditions, in a hydroponic system using the effect of macrophytes Pistia stratiotes and growing algae. Measurement of particle size was made using a laser granulometer. Analysis of the results showed that the additional lighting of the hydroponic system with LED can significantly influence the ability of the suspension particles to agglomerate and, consequently, determine their sedimentation properties...
2017: Water, Air, and Soil Pollution
Chu Chen, Shenglan Xia, Rubo Deng, Caifeng Liu, Gangrong Shi
Fe deficiency may increase Cd accumulation in peanuts. However, the mechanisms are not yet fully understood. In the present study, two contrasting peanut cultivars, Luhua 8 (low seed-Cd cultivar) and Zhenghong 3 (high seed-Cd cultivar) were used to investigate the effect of Fe deficiency on the uptake and accumulation of cadmium (Cd) by hydroponic experiments. Under Fe-sufficient conditions, compared with Luhua 8, Zhenghong 3 had higher specific root length (SRL) and proportion of fine roots with a lower Km for Cd and showed slightly higher expression of AhIRT1 and AhNRAMP1 in the roots...
2017: PloS One
Mingxin Guo, Shipeng Li, Shan Tian, Bei Wang, Xusheng Zhao
Wild jujube (Ziziphus acidojujuba Mill.) is highly tolerant to alkaline, saline and drought stress; however, no studies have performed transcriptome profiling to study the response of wild jujube to these and other abiotic stresses. In this study, we examined the tolerance of wild jujube to NaHCO3-NaOH solution and analyzed gene expression profiles in response to alkaline stress. Physiological experiments revealed that H2O2 content in leaves increased significantly and root activity decreased quickly during alkaline of pH 9...
2017: PloS One
William J Doucette, Chubashini Shunthirasingham, Erik M Dettenmaier, Rosemary T Zaleski, Peter Fantke, Jon A Arnot
Quantifying the transfer of organic chemicals from the environment into terrestrial plants is essential for assessing human and ecological risks, using plants as environmental contamination biomonitors, and predicting phytoremediation effectiveness. Experimental data describing chemical uptake by plants are often expressed as ratios of chemical concentrations in the plant compartments of interest (e.g., leaves, shoots, roots, xylem sap) to that in the exposure medium (e.g., soil, soil pore water, hydroponic solution, air)...
October 4, 2017: Environmental Toxicology and Chemistry
Zhao-Dong Liu, Qin Zhou, Zhi-Neng Hong, Ren-Kou Xu
This work was designed to understand the mechanisms of adsorption of copper (Cu) and cadmium (Cd) on roots of indica and japonica varieties of rice. Six varieties each of indica and japonica rice were grown in hydroponics and the chemical properties of the root surface were analyzed, including surface charges and functional groups (-COO- groups) as measured by the streaming potential and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR). Binding forms of heavy metals adsorbed on rice roots were identified using sequential extraction methods...
2017: Frontiers in Plant Science
Gerald Zvobgo, Jonas LwalabaWaLwalaba, Tichaona Sagonda, James Mutemachani Mapodzeke, Noor Muhammad, Imran Haider Shamsi, Guoping Zhang
The contribution of the phosphate transporters (PHTs) in uptake of arsenate (As(5+)) and phosphate (P) is a widely recognized mechanism. Here we investigated how P regulates the uptake of As(5+) and the subsequent effects on growth and relative expression of PHTs. The study was conducted on 3 barley genotypes differing in As tolerance (ZDB160, As-tolerant; ZDB115, moderately tolerant; ZDB475, As-sensitive) using a hydroponic experiment. There were 3 As(5+) (0, 10 and 100µM) and 3P (0, 50 and 500µM) levels...
September 26, 2017: Ecotoxicology and Environmental Safety
Hendrik Monsees, Werner Kloas, Sven Wuertz
In classical aquaponics (coupled aquaponic systems, 1-loop systems) the production of fish in recirculating aquaculture systems (RAS) and plants in hydroponics are combined in a single loop, entailing systemic compromises on the optimal production parameters (e.g. pH). Recently presented decoupled aquaponics (2-loop systems) have been awarded for eliminating major bottlenecks. In a pilot study, production in an innovative decoupled aquaponic system was compared with a coupled system and, as a control, a conventional RAS, assessing growth parameters of fish (FCR, SGR) and plants over an experimental period of 5 months...
2017: PloS One
Yong Zhang, Jing Li, Weiqi Zhang, Rongsheng Wang, Qiaoqing Qiu, Feng Luo, Yasufumi Hikichi, Kouhei Ohnishi, Wei Ding
Hydroxycinnamic acids (HCAs) are typical monocyclic phenylpropanoids, including cinnamic acid (Cin), coumaric acid (Cou), caffeic acid (Caf), ferulic acid (FA) and their isomers, and involved in the interactions between pathogens and host plants. Here, we focused on the impact of HCAs on expression of type III secretion system (T3SS) in Ralstonia solanacearum. FA significantly induced the expression of the T3SS and some type III effectors (T3Es) genes in hrp-inducing medium, while did not the other HCAs. However, exogenously supplemented FA did not affect the T3SS expression in planta and the elicitation of the hypersensitive response (HR) in tobacco leaves...
2017: Frontiers in Plant Science
Min Zhong, Sanfeng Li, Fenglin Huang, Jiehua Qiu, Jian Zhang, Zhonghua Sheng, Shaoqing Tang, Xiangjin Wei, Peisong Hu
The environmental damage caused by cadmium (Cd) pollution is of increasing concern in China. While the overall plant response to Cd has been investigated in some depth, the contribution (if any) of protein phosphorylation to the detoxification of Cd and the expression of tolerance is uncertain. Here, the molecular basis of the plant response has been explored in hydroponically raised rice seedlings exposed to 10 μΜ and 100 μΜ Cd(2+) stress. An analysis of the seedlings' quantitative phosphoproteome identified 2454 phosphosites, associated with 1244 proteins...
September 27, 2017: International Journal of Molecular Sciences
Zhihong Yang, Heather Chambers, Erin DiCaprio, Gary Gao, Jianrong Li
Human norovirus (NoV) is a leading cause of fresh produce associated outbreaks. Previous research indicates that the roots of growing leafy greens and berries internalize human NoV. However the effect of plant type and inoculum level on internalization rates has not been directly compared. In this study we compared the internalization and dissemination rates of human NoV and its surrogate, Tulane virus (TV) in green onion, radishes, and Romaine lettuce. We also evaluated the effect inoculum level and plant growth matrix on the rate of viral internalization...
February 2018: Food Microbiology
Xingxing Li, Mingjing Ke, Meng Zhang, W J G M Peijnenburg, Xiaoji Fan, Jiahui Xu, Zhenyan Zhang, Tao Lu, Zhengwei Fu, Haifeng Qian
Diclofop-methyl (DM), a common post-emergence herbicide, is frequently used in agricultural production. Silver nanoparticles (AgNPs) are one of the most widely used nanoparticles, and as such, have been detected and monitored in several environmental systems. Here we investigated the interactive effects of DM and AgNPs on the physiological morphology, photosynthesis and antioxidant system of Arabidopsis thaliana. Our results demonstrated that a 1.0 mg/L DM treatment had no significant effect on the fresh weight of plant shoots and the content of total chlorophyll and anthocyanin...
September 18, 2017: Environmental Pollution
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