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Joanna Jaskowiak, Oliver Tkaczyk, Michal Slota, Jolanta Kwasniewska, Iwona Szarejko
Barley is one of the cereals that are most sensitive to aluminum (Al). Al in acid soils limits barley growth and development and, as a result, its productivity. The inhibition of root growth is a widely accepted indicator of Al stress. Al toxicity is affected by many factors including the culture medium, pH, Al concentration and the duration of the treatment. However, Al can act differently in different species and still Al toxicity in barley deserves study. Since the mechanism of Al toxicity is discussed we cytogenetically describe the effects of different doses of bioavailable Al on the barley nuclear genome-mitotic activity, cell cycle profile and DNA integrity...
2018: PloS One
Jochen Menz, Tim Range, Johannes Trini, Uwe Ludewig, Benjamin Neuhäuser
Natural accessions of Arabidopsis thaliana differ in their growth and development, but also vary dramatically in their nitrogen use efficiencies (NUE). The molecular basis for these differences has not been addressed yet. Experiments with five contrasting accessions grown in hydroponics at different levels of inorganic nitrogen confirmed low NUE of Col-0 and higher NUE in Tsu-0. At constant external nitrogen supply, higher NUE was based on nitrogen capture, rather than utilization of nitrogen for shoot biomass...
February 20, 2018: Scientific Reports
Katja Žanić, Gvozden Dumičić, Marija Mandušić, Gabriela Vuletin Selak, Ivana Bočina, Branimir Urlić, Ivica Ljubenkov, Viljemka Bučević Popović, Smiljana Goreta Ban
Bemisia tabaci is one of the most devastating pests in tomato greenhouse production. Insecticide resistance management for B. tabaci requires a novel approach that maximizes non-chemical methods for pest control. The aim of this study was to test the effects of rootstocks on B. tabaci populations in hydroponically grown tomato plants. In order to contribute to the better understanding of the mechanisms defining the attractiveness of plant to the aerial pest, the effects of rootstocks on leaf anatomy and the amino acid composition of phloem sap were assessed...
2018: Frontiers in Plant Science
Saniye Elvan Öztürk, Mehmet Göktay, Canan Has, Mehmet Babaoğlu, Jens Allmer, Sami Doğanlar, Anne Frary
Puccinellia distans, common alkali grass, is found throughout the world and can survive in soils with boron concentrations that are lethal for other plant species. Indeed, P. distans accumulates very high levels of this element. Despite these interesting features, very little research has been performed to elucidate the boron tolerance mechanism in this species. In this study, P. distans samples were treated for three weeks with normal (0.5 mg L -1 ) and elevated (500 mg L -1 ) boron levels in hydroponic solution...
February 12, 2018: Chemosphere
Christopher S Storer, Zachary Coldrick, Daniel J Tate, Jack Marsden Donoghue, Bruce Grieve
An interdigitated electrode sensor was designed and microfabricated for measuring the changes in the capacitance of three phosphate selective molecularly imprinted polymer (MIP) formulations, in order to provide hydroponics users with a portable nutrient sensing tool. The MIPs investigated were synthesised using different combinations of the functional monomers methacrylic acid (MAA) and N -allylthiourea, against the template molecules diphenyl phosphate, triethyl phosphate, and trimethyl phosphate. A cross-interference study between phosphate, nitrate, and sulfate was carried out for the MIP materials using an inductance, capacitance, and resistance (LCR) meter...
February 10, 2018: Sensors
Asis Shrestha, Ambrose Kwaku Dziwornu, Yoshiaki Ueda, Lin-Bo Wu, Boby Mathew, Michael Frei
Manganese (Mn) is an essential micro-nutrient for plants, but flooded rice fields can accumulate high levels of Mn2+ leading to Mn toxicity. Here, we present a genome-wide association study (GWAS) to identify candidate loci conferring Mn toxicity tolerance in rice (Oryza sativa L.). A diversity panel of 288 genotypes was grown in hydroponic solutions in a greenhouse under optimal and toxic Mn concentrations. We applied a Mn toxicity treatment (5 ppm Mn2+, 3 weeks) at twelve days after transplanting. Mn toxicity caused moderate damage in rice in terms of biomass loss and symptom formation despite extremely high shoot Mn concentrations ranging from 2...
2018: PloS One
Laís Pessôa de Lacerda, Liséte Celina Lange, Marcel Giovanni Costa França, Mônica Maria Diniz Leão
We evaluated the salinity reduction of the experimental saline solutions through ion uptake capacity of two plant species, purslane (Portulaca oleraceae) and water hyacinth (Eichhornia crassipes). These species were grown in experimental hydroponic units simulating a floating system. The hydroponic system contained treatments with three nutrient solutions identified as A1, A2, and A3 composed of fixed concentrations of macro and micronutrients to which three different concentrations of sodium chloride had been added...
February 9, 2018: Environmental Technology
Marcus John Pennington, Jason A Rothman, Michael Bellinger Jones, Quinn S McFrederick, Jay Gan, John T Trumble
Many countries are utilizing reclaimed wastewater for agriculture as water demands due to drought, rising temperatures, and expanding human populations. Unfortunately, wastewater often contains biologically active, pseudopersistant pharmaceuticals, even after treatment. Runoff from agriculture and effluent from wastewater treatment plants also contribute high concentrations of pharmaceuticals to the environment. This study assessed the effects of common pharmaceuticals on an agricultural pest, the aphid Myzus persicae (Sulzer, Hemiptera: Aphididae)...
February 8, 2018: Environmental Monitoring and Assessment
Minyue Dai, Wenwen Liu, Hualong Hong, Haoliang Lu, Jingchun Liu, Hui Jia, Chongling Yan
Phosphorous (P) is an essential element that mediates various stresses in plants. In this study, the effects of P on polysaccharides in the root cell walls of two hydroponically cultivated mangrove seedlings (A. marina and K. obovata) that differ in Cd accumulation ability were examined in the context of Cd stress. The results showed that A. marina exhibited a higher degree of tolerance to Cd than K. obovata. In both mangrove seedlings, pectin and hemicellulose 1 increased significantly with increasing P levels, the effects of which were greater in A...
January 2018: Marine Pollution Bulletin
Da Su, Lujian Zhou, Qian Zhao, Gang Pan, Fangmin Cheng
Development of rice cultivars with low phytic acid (lpa) is considered as a primary strategy for biofortification of zinc (Zn) and iron (Fe). Here, two rice genotypes (XS110 and its lpa mutant) were used to investigate the effect of P supplies on accumulations and distributions of PA, Zn and Fe in rice grains by using hydroponics and detached panicle culture system. Results showed that higher P level increased grain PA concentration on dry matter basis (g/kg), but it markedly decreased PA accumulation on per grain basis (mg/grain)...
February 5, 2018: Journal of Agricultural and Food Chemistry
Agnieszka Hanaka, Lech Lechowski, Magdalena Mroczek-Zdyrska, Joanna Strubińska
The activities of antioxidative enzymes, i.e. superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and guaiacol peroxidase (GPX), in the leaves and roots of Zea mays L. plants exposed to abiotic (methyl jasmonate, MJ, or/and copper, Cu) and biotic (Trigonotylus caelestialium) factors were examined. The contribution of MJ as a signal molecule in the defense mechanism against abiotic and biotic stresses was studied. All plants were cultivated hydroponically and divided into three groups: not treated by abiotic factors (control), treated by MJ only (MJ) and by MJ and Cu (MJ + Cu) and in each group half of the plants were exposed to T...
February 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
Naiara Viana Campos, Samara Arcanjo-Silva, Larisse Freitas-Silva, Talita Oliveira de Araújo, Daniela Pinto Souza-Fernandes, Aristéa Alves Azevedo
Pityrogramma calomelanos is interestingly the single non-Pteris arsenic (As)-hyperaccumulating fern. It has been pointed as a potential species for phytoremediation and a model plant to study the As toxicity and its mechanisms of action. In order to investigate the morphoanatomical traits associated to As tolerance, P. calomelanos plants were exposed to different As concentrations in hydroponic solution. At low As dose (1 mM As), 90% of the As accumulated in plants was allocated in shoots, and no symptoms of As stress were observed in fronds and roots...
February 2, 2018: Environmental Science and Pollution Research International
Aleksandra Bawiec
Wastewater treatment with the use of plants is one of the most promising treatment technologies for municipal, domestic and industrial wastewater. The aim of this study was to evaluate the reduction of biogenic compounds concentrations in municipal wastewater treated with the use of hydroponic technology as a tertiary treatment. Research was conducted to assess the suitability of hydroponic lagoon use for municipal wastewater treatment. Samples of sewage for its quality tests were taken from a wastewater treatment plant (WWTP) located in the south-western part of Poland...
February 2, 2018: Environmental Technology
Dae Young Lee, Hyoung-Geun Kim, Yeong-Geun Lee, Jin Hee Kim, Jae Won Lee, Bo-Ram Choi, In-Bae Jang, Geum-Soog Kim, Nam-In Baek
A new ginsenoside, named ginsenoside Rh23 (1), and 20-O-β-d-glucopyranosyl-3β,6α,12β,20β,25-pentahydroxydammar-23-ene (2) were isolated from the leaves of hydroponic Panax ginseng. Compounds were isolated by various column chromatography and their structures were determined based on spectroscopic methods, including high resolution quadrupole/time of flight mass spectrometry (HR-QTOF/MS), nuclear magnetic resonance (NMR) spectroscopy, and infrared (IR) spectroscopy. To determine anti-melanogenic activity, the change in the melanin content in melan-a cells treated with identified compounds was tested...
January 29, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Aurora Gitto, Wieland Fricke
The cellular and molecular basis of a reduction in root water uptake in plants exposed to heavy metals such as zinc (Zn) is poorly studied. The aim of the present study on hydroponically grown barley (Hordeum vulgare) was to test whether any reduction in root hydraulic conductivity (Lp) in response to Zn treatment is accompanied by a reduction in cell Lp and gene expression level of aquaporin (AQP) isoforms. Plants were grown in the presence of 0.25 μM, (control), 0.1 mM and 1 mM Zn in the root medium and analysed when they were 16-18 d old...
January 30, 2018: Physiologia Plantarum
Yun-Feng Zhang, Bao-Lin Guo, Xiang-Bo Yang, Li Li, Zhi-Hai Jiang, Yu-Min Mo
Nitrogen nutrition divided into concentrations and forms for Epimedium pseudowushanense was studied under hydroponic conditions. There were 7 nitrogen concentrations treatments(N0-N6)which nitrogen concentration was 0, 2.5, 5.0, 7.5, 10.0, 13.0 mmol•L⁻¹, respectively, and 5 nitrogen forms and proportions treatments (T1-T5) which NO3-N/NH4-N was 5∶0, 4∶1, 2.5∶2.5, 1∶4, 0∶5 respectively, the total nitrogen applied was 5 mmol•L⁻¹. The results showed that along with the increase of nitrogen concentration, biomass (dry weight) and leaf dry weight increased, which in N5 treatment was 29%, 23% higher than those in N0 and 36%, 23% higher than those in N4 respectively, but not significantly different from N6 treatment...
December 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
Minami Yamada, Goitseone Malambane, Satoshi Yamada, Sony Suharsono, Hisashi Tsujimoto, Baleseng Moseki, Kinya Akashi
Environmental pollution by potentially toxic elements (PTEs) has become a serious problem with increasing industrialization and the disturbance of natural biogeochemical cycles. Jatropha is an oilseed-bearing shrub with high potential for biodiesel production in arid regions. In this study, we examined the physiological responses of this plant to five representative PTEs (Cd, Cr, Cu, Ni, and Zn) in a hydroponic culture. Application of higher concentrations of Cd and Zn led to severe leaf chlorosis, and Cd, Cu, and Ni treatments resulted in significant growth retardation...
January 26, 2018: Scientific Reports
Xilan Yang, Yaxi Liu, Fangkun Wu, Xiaojun Jiang, Yu Lin, Zhiqiang Wang, Zhengli Zhang, Jian Ma, Guangdeng Chen, Yuming Wei, Youliang Zheng
Deficiency of available phosphorus (P) in soil limits wheat production and creates a need to develop P-deficiency-tolerant cultivars. Plant roots, important organs for absorbing nutrients and synthesizing growth regulators, are good candidates for P-efficiency screening. In this study, we evaluated five root traits under hydroponic culture conditions either with (AP) or without (NP) applied P in a recombinant inbred line population H461/CM107 of <i>Triticum aestivum </i>L. at the seedling stage...
January 26, 2018: Genome Génome / Conseil National de Recherches Canada
Noriyuki Konishi, Masahide Saito, Fumi Imagawa, Keiich Kanno, Tomoyuki Yamaya, Soichi Kojima
Ammonium is a major nitrogen source for plants; it is assimilated into glutamine via a reaction catalyzed by glutamine synthetase (GLN). Arabidopsis expresses four cytosolic GLN genes, GLN1;1, GLN1;2, GLN1;3, and GLN1;4, in roots. However, the function and organization of these GLN1 isozymes in ammonium assimilation in roots remain unclear. In this study, we aimed to characterize the four GLN1 isozymes. The levels of growth of wild type and gln1 single- and multiple-knockout lines were compared in a hydroponic culture at ammonium concentrations of 0...
January 24, 2018: Plant & Cell Physiology
Sevinç Karadağ, Emine M Görüşük, Ebru Çetinkaya, Seda Deveci, Koray B Dönmez, Emre Uncuoğlu, Mustafa Doğu
BACKGROUND: A fully automated flow injection analysis (FIA) system was developed for determination of phosphate ion in nutrient solutions. This newly developed FIA system is a portable, rapid, and sensitive measuring instrument that allows on-line analyzing and monitoring of phosphate ion concentration in nutrient solutions. Molybdenum blue method, which is widely used in FIA phosphate analysis, was adapted to the developed FIA system. The method is based on the formation of ammonium Mo(VI) ion by reaction of ammonium molybdate with the phosphate ion present in the medium...
January 25, 2018: Journal of the Science of Food and Agriculture
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