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https://www.readbyqxmd.com/read/28931464/the-interactive-effects-of-diclofop-methyl-and-silver-nanoparticles-on-arabidopsis-thaliana-growth-photosynthesis-and-antioxidant-system
#1
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
https://www.readbyqxmd.com/read/28931380/leaves-play-a-central-role-in-the-adaptation-of-nitrogen-and-sulfur-metabolism-to-ammonium-nutrition-in-oilseed-rape-brassica-napus
#2
Inmaculada Coleto, Marlon de la Peña, Jon Rodríguez-Escalante, Iraide Bejarano, Gaëtan Glauser, Pedro M Aparicio-Tejo, M Begoña González-Moro, Daniel Marino
BACKGROUND: The coordination between nitrogen (N) and sulfur (S) assimilation is required to suitably provide plants with organic compounds essential for their development and growth. The N source induces the adaptation of many metabolic processes in plants; however, there is scarce information about the influence that it may exert on the functioning of S metabolism. The aim of this work was to provide an overview of N and S metabolism in oilseed rape (Brassica napus) when exposed to different N sources...
September 20, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28926799/iron-deficiency-stimulates-anthocyanin-accumulation-in-grapevine-apical-leaves
#3
Leila Caramanico, Laura Rustioni, Gabriella De Lorenzis
Iron chlorosis is a diffuse disorder affecting Mediterranean vineyards. Beside the commonly described symptom of chlorophyll decrease, an apex reddening was recently observed. Secondary metabolites, such as anthocyanins, are often synthetized to cope with stresses in plants. The present work aimed to evaluate grapevine responses to iron deficiency, in terms of anthocyanin metabolism (reflectance spectrum, total anthocyanin content, HPLC profile and gene expression) in apical leaves of Cabernet sauvignon and Sangiovese grown in hydroponic conditions...
September 9, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28924722/evaluation-of-heme-oxygenase-1-ho-1-in-cd-and-ni-induced-cytotoxicity-and-crosstalk-with-ros-quenching-enzymes-in-two-to-four-leaf-stage-seedlings-of-vigna-radiata
#4
Lovely Mahawar, Rajesh Kumar, Gyan Singh Shekhawat
Research on heme oxygenase in plants has received consideration in recent years due to its several roles in development, defense, and metabolism during various environmental stresses. In the current investigation, the role of heme oxygenase (HO) 1 was evaluated in reducing heavy metal (Cd and Ni) uptake and alleviating Cd and Ni toxicity effects in the hydroponically grown seedlings of Vigna radiata var. PDM 54. Seedlings were subjected to Cd- and Ni-induced oxidative stress independently at different concentrations ranging from 10 to 100 μM...
September 18, 2017: Protoplasma
https://www.readbyqxmd.com/read/28922748/cesium-uptake-by-rice-roots-largely-depends-upon-a-single-gene-hak1-which-encodes-a-potassium-transporter
#5
Hiroki Rai, Saki Yokoyama, Namiko Satoh-Nagasawa, Jun Furukawa, Takiko Nomi, Yasuka Ito, Shigeto Fujimura, Hidekazu Takahashi, Ryuichiro Suzuki, ELMannai Yousra, Akitoshi Goto, Shinichi Fuji, Shin-Ichi Nakamura, Takuro Shinano, Nobuhiro Nagasawa, Hiroetsu Wabiko, Hiroyuki Hattori
Incidents at the Fukushima and Chernobyl nuclear power stations have resulted in widespread environmental contamination by radioactive nuclides. Among them, 137cesium has a 30 year half-life, and its persistence in soil raises serious food security issues. It is therefore important to prevent plants, especially crop plants, from absorbing radiocesium. In Arabidopsis thaliana, cesium ions are transported into root cells by several different potassium transporters such as high-affinity K+ transporter 5 (AtHAK5)...
September 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28922747/allelic-variation-of-ntnramp5-associated-with-cultivar-variation-in-cadmium-accumulation-in-tobacco
#6
Zhong Tang, Hailin Cai, Jie Li, Yanling Lv, Wenwen Zhang, Fang-Jie Zhao
Tobacco (Nicotiana tabacum) is a cadmium (Cd) accumulator, and smoking is a major source of Cd exposure. In the present study, we identified two tobacco cultivars with contrasting phenotypes of Cd and manganese (Mn) accumulation in both hydroponic and soil pot experiments. Physiological experiments showed that the two cultivars differed in Cd uptake, but not in Cd translocation from roots to shoots. A homolog of OsNramp5 (natural resistance-associated macrophage protein 5), NtNramp5, was isolated from both cultivars...
September 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28921945/multiwalled-carbon-nanotubes-dramatically-affect-the-fruit-metabolome-of-exposed-tomato-plants
#7
Diamond L McGehee, Mohamed H Lahiani, Fahmida Irin, Micah J Green, Mariya V Khodakovskaya
Here, we reported that multiwalled carbon nanotubes (MWCNT) added to hydroponics system can enhance fruit production of exposed tomato plants. We quantified the exact amount of MWCNT accumulated inside of fruits collected by MWCNT-exposed plants using an advanced microwave induced heating technique (MIH). We found that absorption of MWCNT by tomato fruits significantly affected total fruit metabolome as was confirmed by LC-MS. Our data highlight the importance of comprehensive toxicological risk assessment of plants contaminated with carbon nanomaterials...
September 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28920675/mitigation-of-n2o-emission-from-aquaponics-by-optimizing-the-nitrogen-transformation-process-aeration-management-and-exogenous-carbon-pla-addition
#8
Yina Zou, Zhen Hu, Jian Zhang, Yingke Fang, Minying Li, Jianda Zhang
N2O production in aquaponics is an inevitable concern when aquaponics is developed as a future production system. In the present study, two attempts were applied to mitigate N2O emission from aquaponics, i.e., aeration in hydroponic bed (HA) and addition of polylactic acid (PLA) into fillers (PA). Results showed that N2O emission from HA and PA was decreased by 47.1-58.1% and 43.2-74.9% respectively compared with that in control. Denitrification was proved to be the main emission pathway in all treatments, representing 62...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28911018/wilted-cucumber-plants-infected-by-fusarium-oxysporum-f-sp-cucumerinum-do-not-suffer-from-water-shortage
#9
Yuming Sun, Min Wang, Yingrui Li, Zechen Gu, Ning Ling, Qirong Shen, Shiwei Guo
Background and Aims: Fusarium wilt is primarily a soil-borne disease and results in yield loss and quality decline in cucumber (Cucumis sativus). The main symptom of fusarium wilt is the wilting of entire plant, which could be caused by a fungal toxin(s) or blockage of water transport. To investigate whether this wilt arises from water shortage, the physiological responses of hydroponically grown cucumber plants subjected to water stress using polyethylene glycol (PEG, 6000) were compared with those of plants infected with Fusarium oxysporum f...
September 1, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28910580/differential-responses-of-cell-wall-bound-phenolic-compounds-in-sensitive-and-tolerant-varieties-of-rice-in-response-to-salinity
#10
Poulami Gupta, Bratati De
In plants, cell wall bound phenolics change in response to stress. The aim of the study was to investigate the effect of NaCl induced stress on wall bound phenolics in four rice varieties, of which two (Bhutnath, Nonabokra) were salt tolerant and two (MTU 7029, Sujala) were salt sensitive. After germination, seedlings were grown in hydroponic solution and subjected to salinity stress (25mM, 50mM, 100mM and 150mM NaCl) on day 12. Wall bound phenolic compounds were determined by GC-MS based metabolite analysis...
September 14, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28900441/bacillus-amyloliquefaciens-confers-tolerance-to-various-abiotic-stresses-and-modulates-plant-response-to-phytohormones-through-osmoprotection-and-gene-expression-regulation-in-rice
#11
Shalini Tiwari, Vivek Prasad, Puneet S Chauhan, Charu Lata
Being sessile in nature, plants have to withstand various adverse environmental stress conditions including both biotic and abiotic stresses. Comparatively, abiotic stresses such as drought, salinity, high temperature, and cold pose major threat to agriculture by negatively impacting plant growth and yield worldwide. Rice is one of the most widely consumed staple cereals across the globe, the production and productivity of which is also severely affected by different abiotic stresses. Therefore, several crop improvement programs are directed toward developing stress tolerant rice cultivars either through marker assisted breeding or transgenic technology...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28898831/improving-nitrogen-utilization-efficiency-of-aquaponics-by-introducing-algal-bacterial-consortia
#12
Yingke Fang, Zhen Hu, Yina Zou, Jian Zhang, Zhuoran Zhu, Jianda Zhang, Lichao Nie
Aquaponics is a promising technology combining aquaculture with hydroponics. In this study, algal-bacterial consortia were introduced into aquaponics, i.e., algal-bacterial based aquaponics (AA), to improve the nitrogen utilization efficiency (NUE) of aquaponics. The results showed that the NUE of AA was 13.79% higher than that of media-based aquaponics (MA). In addition, higher NO3(-) removal by microalgae assimilation led to better water quality in AA, which made up for the deficiencies of poor aquaponic management of nitrate...
August 22, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28892723/evaluation-of-a-novel-test-design-to-determine-uptake-of-chemicals-by-plant-roots
#13
Marc Lamshoeft, Zhenglei Gao, Herbert Resseler, Carola Schriever, Robin Sur, Paul Sweeney, Sarah Webb, Birgit Zillgens, Marco U Reitz
A new hydroponic study design to determine uptake of chemicals by plant roots was tested by (i) investigating uptake of [(14)C]-1,2,4-triazole by wheat plants in a ring test with ten laboratory organizations and (ii) studying uptake of ten other radiolabelled chemicals by potato, tomato or wheat plants in two laboratories. Replicate data from the ring test were used to calculate plant uptake factor (PUF) values (uptake into roots and shoots) and transpiration stream concentration factor (TSCF) values (uptake into shoots)...
September 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28890723/dynamics-of-short-term-phosphorus-uptake-by-intact-mycorrhizal-and-non-mycorrhizal-maize-plants-grown-in-a-circulatory-semi-hydroponic-cultivation-system
#14
Mónica Garcés-Ruiz, Maryline Calonne-Salmon, Katia Plouznikoff, Coralie Misson, Micaela Navarrete-Mier, Sylvie Cranenbrouck, Stéphane Declerck
A non-destructive cultivation system was developed to study the dynamics of phosphorus (Pi) uptake by mycorrhizal and non-mycorrhizal maize plantlets. The system consisted of a plant container connected via silicon tubes to a glass bottle containing a nutrient solution supplemented with Pi. The nutrient solution is pumped with a peristaltic pump to the upper part of the container via the silicon tubes and the solution percolate through the plantlet container back into the glass bottle. Pi is sampled from the glass bottle at regular intervals and concentration evaluated...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28886454/effects-of-olive-root-warming-on-potassium-transport-and-plant-growth
#15
María Benlloch-González, Rosa Sánchez-Lucas, Manuel Benlloch
Young olive (Olea europaea L.) plants generated from seed were grown in liquid hydroponic medium exposing the roots system for 33days or 24h to high temperature (37°C) while the aerial part to 25°C aiming to determine the prolonged and immediate effects of root warming on K(+)(Rb(+)) transport in the root and consequently on plant growth. The exposition of the root system to 37°C for 24h inhibited K(+) (Rb(+)) transport from root to shoot having no effect on its uptake. However, when the root system was exposed permanently to 37°C both the K(+) (Rb(+)) uptake and translocation to the aerial part were inhibited as well as the growth in all plants organs...
August 5, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28880898/qtl-mapping-of-selenium-content-using-a-ril-population-in-wheat
#16
Pei Wang, Huinan Wang, Qing Liu, Xia Tian, Yanxi Shi, Xiaocun Zhang
Selenium (Se) is an essential trace element that plays various roles in human health. Understanding the genetic control of Se content and quantitative trait loci (QTL) mapping provide a basis for Se biofortification of wheat to enhance grain Se content. In the present study, a set of recombinant inbred lines (RILs) derived from two Chinese winter wheat varieties (Tainong18 and Linmai6) was used to detect QTLs for Se content in hydroponic and field trials. In total, 16 QTLs for six Se content-related traits were detected on eight chromosomes, 1B, 2B, 4B, 5A, 5B, 5D, 6A, and 7D...
2017: PloS One
https://www.readbyqxmd.com/read/28879634/does-low-uranium-concentration-generates-phytotoxic-symptoms-in-pisum-sativum-l-in-nutrient-medium
#17
Frank Tawussi, Clemens Walther, Dharmendra K Gupta
Due to excessive mining and use of radionuclide especially uranium (U) and its fission products, numerous health hazards as well as environmental contamination worldwide have been created. The present study focused on demonstrating whether low concentration of U treatment in liquid nutient medium may translocate traces of U in plants and in fruits of Pisum sativum after 30 and 60 days of exposure for the safe use as a food supplement for human/animals. Hydroponically grown plants (in amended Hoagland medium) were treated with two different concentrations of uranium ([U] = 100 and 500 nM, respectively)...
September 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28876016/bioaccumulation-of-hexachlorobutadiene-in-pumpkin-seedlings-after-waterborne-exposure
#18
Xingwang Hou, Haiyan Zhang, Yanlin Li, Miao Yu, Jiyan Liu, Guibin Jiang
Hexachlorobutadiene (HCBD) has been listed as a persistent organic pollutant (POP) in the Stockholm Convention, and is now drawing more and more research interest. However, the understanding of its bioaccumulation, especially in plants, is still very limited. In this work, the behavior of HCBD in aqueous solution and pumpkin seedlings was studied through in-lab hydroponic exposure experiments. It was found that 69% of HCBD volatilized from water to the atmosphere after one day of exposure, and only 1% remained in the solution after four days...
September 6, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28873463/effects-of-antimony-on-redox-activities-and-antioxidant-defence-systems-in-sunflower-helianthus-annuus-l-plants
#19
Alfonso Ortega, Inmaculada Garrido, Ilda Casimiro, Francisco Espinosa
The alterations induced by the toxicity of antimony (Sb) in the roots and leaves of sunflower plants were determined. The plants were grown hydroponically with different concentrations of Sb, a heavy metal which reduces biomass production and growth. There was preferential accumulation of Sb in the tissues of the roots, with the concentrations in the leaves being much lower. The accumulation of other mineral elements was also altered, especially that of Fe and Zn. Chlorophyll content declined, as also did the photosynthetic efficiency, but the carotenoid content remained unaltered...
2017: PloS One
https://www.readbyqxmd.com/read/28871538/isolation-and-structural-studies-of-mitochondria-from-pea-roots
#20
Abhaypratap Vishwakarma, Kapuganti Jagadis Gupta
For structural and respiratory studies, isolation of intact and active mitochondria is essential. Here, we describe an isolation method which gave good yield and intact mitochondria from 2-week-old pea (Pisum sativum) roots grown hydroponically under standard growth conditions. We used Percoll gradient centrifugation for this isolation procedure. The yield of purified mitochondria was 50 μg/g FW. Isolated mitochondria maintained their structure which was observed by using MitoTracker green in confocal microscope and scanning electron microscopy (SEM)...
2017: Methods in Molecular Biology
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