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https://www.readbyqxmd.com/read/28645179/system-wide-analysis-of-short-term-response-to-high-temperature-in-pinus-radiata
#1
Mónica Escandón, Luis Valledor, Jesús Pascual, Gloria Pinto, María Jesús Cañal, Mónica Meijón
Pinus radiata seedlings, the most widely planted pine species in the world, were exposed to temperatures within a range mimicking future scenarios based on current models of heat increase. The short-term heat response in P. radiata was studied in detail by exploring the metabolome, proteome and targeted transcriptome. The use of complementary mass spectrometry techniques, GC-MS and LC-Orbitrap-MS, together with novel bioinformatics tools allowed the reliable quantification of 2,075 metabolites and 901 protein groups...
June 22, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28644992/surface-coating-modulated-toxic-responses-to-silver-nanoparticles-in-wolffia-globosa
#2
Xiaoyan Zou, Penghui Li, Jie Lou, Hongwu Zhang
With the omnipresence of silver nanoparticles (AgNPs) in our daily consumer products, their release has raised serious concerns. However, the biochemical mechanisms by which plants counteract the toxicity of nanoparticles are largely unknown. This study investigated the exposure of aquatic Wolffia globosa to ATP-nAg (AgNPs coated with adenosine triphosphate), cit-nAg (AgNPs coated with citrate), and Ag(+). Hill reaction activity was basically lost in W. globosa treated with 10mg/L ATP-nAg and Ag(+), while the activity was still maintained at 38...
June 15, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28643283/role-of-cation-structure-in-the-phytotoxicity-of-ionic-liquids-growth-inhibition-and-oxidative-stress-in-spring-barley-and-common-radish
#3
Robert Biczak, Barbara Pawłowska, Arkadiusz Telesiński, Janusz Kapuśniak
The present study determines the influence of three ionic liquids (ILs) containing cations with diversified structure on the growth and development of spring barley seedlings and common radish leaves. Increasing amounts of 1-butyl-1-methylpyrrolidinium hexafluorophosphate [Pyrrol][PF6], 1-butyl-1-methylpiperidinium hexafluorophosphate [Piper][PF6], and 1-butyl-4-methylpyridinium hexafluorophosphate [Pyrid][PF6] were added to the soil on which both plants were cultivated. The results of this studies showed that the applied ILs were highly toxic for plants, demonstrated by the inhibition of length of plant shoots and roots, decrease of fresh mass, and increase of dry weight content...
June 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28643085/exogenous-application-of-nitric-oxide-modulates-osmolyte-metabolism-antioxidants-enzymes-of-ascorbate-glutathione-cycle-and-promotes-growth-under-cadmium-stress-in-tomato
#4
Parvaiz Ahmad, Mohammed Abass Ahanger, Mohammed Nasser Alyemeni, Leonard Wijaya, Pravej Alam
Experiments were carried out to investigate the role of nitric oxide (NO) in ameliorating the negative effects of cadmium stress in tomato seedlings. Plants treated with cadmium (CdCl2, 150 μM) showed reduced growth, biomass yield, pigment content, chlorophyll fluorescence, and gas exchange parameters. Exogenous application of NO donor (sodium nitroprusside) with nutrient solution protected chlorophyll pigments, restored chlorophyll fluorescence and gas exchange parameters, and caused significant enhancements in growth and biomass yield...
June 22, 2017: Protoplasma
https://www.readbyqxmd.com/read/28642763/rootstock-sub-optimal-temperature-tolerance-determines-transcriptomic-responses-after-long-term-root-cooling-in-rootstocks-and-scions-of-grafted-tomato-plants
#5
Georgia Ntatsi, Dimitrios Savvas, Vassilis Papasotiropoulos, Anastasios Katsileros, Rita M Zrenner, Dirk K Hincha, Ellen Zuther, Dietmar Schwarz
Grafting of elite cultivars onto tolerant rootstocks is an advanced strategy to increase tomato tolerance to sub-optimal temperature. However, a detailed understanding of adaptive mechanisms to sub-optimal temperature in rootstocks and scions of grafting combinations on a physiological and molecular level is lacking. Here, the commercial cultivar Kommeet was grafted either onto 'Moneymaker' (sensitive) or onto the line accession LA 1777 of Solanum habrochaites (tolerant). Grafted plants were grown in NFT-system at either optimal (25°C) or sub-optimal (15°C) temperatures in the root environment with optimal air temperature (25°C) for 22 days...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642762/arbuscular-mycorrhiza-augments-arsenic-tolerance-in-wheat-triticum-aestivum-l-by-strengthening-antioxidant-defense-system-and-thiol-metabolism
#6
Surbhi Sharma, Garima Anand, Neeraja Singh, Rupam Kapoor
Arbuscular mycorrhiza (AM) can help plants to tolerate arsenic (As) toxicity. However, plant responses are found to vary with the host plant and the AM fungal species. The present study compares the efficacy of two AM fungi Rhizoglomus intraradices (M1) and Glomus etunicatum (M2) in amelioration of As stress in wheat (Triticum aestivum L. var. HD-2967). Mycorrhizal (M) and non-mycorrhizal (NM) wheat plants were subjected to four levels of As (0, 25, 50, and 100 mg As kg(-1) soil). Although As additions had variable effects on the percentage of root colonized by the two fungal inoculants, each mycobiont conferred benefits to the host plant...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28638888/modulation-of-key-biochemical-markers-relevant-to-stroke-by-antiaris-africana-leaf-extract-following-cerebral-ischemia-reperfusion-injury
#7
Omotayo B Ilesanmi, Afolabi C Akinmoladun, Olanrewaju Sam Olayeriju, Ibrahim Olabayode Saliu, M Tolulope Olaleye, Afolabi A Akindahunsi
BACKGROUND: Oxidative stress plays a significant role in stroke pathogenesis. Hence, plants rich in antioxidant phytochemicals have been suggested as effective remedies for prevention and treatment of stroke and other neurological diseases. Antiaris africana Engl. (Moraceae) is traditionally used for the management of brain-related problems but there is paucity of data on its anti-stroke potential. MATERIALS AND METHODS: Ischemia/reperfusion injury was induced by a 30 min bilateral common carotid artery occlusion/ 2 h reperfusion (BCCAO/R) in the brain of male Wistar rats...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28638395/modulation-of-antioxidant-defense-system-is-associated-with-combined-drought-and-heat-stress-tolerance-in-citrus
#8
Sara I Zandalinas, Damián Balfagón, Vicent Arbona, Aurelio Gómez-Cadenas
Drought and high temperatures are two major abiotic stress factors that often occur simultaneously in nature, affecting negatively crop performance and yield. Moreover, these environmental challenges induce oxidative stress in plants through the production of reactive oxygen species (ROS). Carrizo citrange and Cleopatra mandarin are two citrus genotypes with contrasting ability to cope with the combination of drought and heat stress. In this work, a direct relationship between an increased antioxidant activity and stress tolerance is reported...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28633105/effects-of-triacontanol-on-ascorbate-glutathione-cycle-in-brassica-napus-l-exposed-to-cadmium-induced-oxidative-stress
#9
Elham Asadi Karam, Viviana Maresca, Sergio Sorbo, Batool Keramat, Adriana Basile
The ability of exogenous triacontanol (TRIA), a plant growth regulator, to reduce Cd toxicity was studied in canola (Brassica napus L.) plants. The following biological parameters were examined in canola seedlings to investigate TRIA-induced tolerance to Cd toxicity: seedling growth, chlorophyll damage and antioxidant response. In particular, TRIA application reduced Cd-induced oxidative damage, as shown by reduction of ROS content, lipoxygenase (LOX) activity and lipid peroxidation level. TRIA pretreatment increased non-enzymatic antioxidant contents (ascorbate, AsA, glutathione and GSH), phytochelatin content (PCs) and activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), monodehydroascorbate reductase (MDHAR), dehydro ascorbate reductase (DHAR), and glutathione reductase (GR), so reducing the oxidative stress...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28633086/beneficial-effects-of-melatonin-in-overcoming-drought-stress-in-wheat-seedlings
#10
Guibin Cui, Xiaoxiao Zhao, Shudong Liu, Fengli Sun, Chao Zhang, Yajun Xi
Melatonin plays an important role in abiotic stress in plant, but its role in wheat drought tolerance is less known. To verify its role, wheat seedlings (Triticum aestivum L. 'Yan 995') at 60% and 40% of field capacity were treated with 500 μM melatonin in this study. Melatonin treatment significantly enhanced the drought tolerance of wheat seedlings, as demonstrated by decreased membrane damage, more intact grana lamella of chloroplast, higher photosynthetic rate, and maximum efficiency of photosystem II, as well as higher cell turgor and water holding capacity in melatonin-treated seedlings...
June 15, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28631132/adaptive-biochemical-and-physiological-responses-of-eriobotrya-japonica-to-fluoride-air-pollution
#11
Nada Elloumi, Mohamed Zouari, Imed Mezghani, Ferjani Ben Abdallah, Steve Woodward, Monem Kallel
The biochemical and physiological effects of fluoride were investigated in loquat trees (Eriobotrya japonica) grown in the vicinity of a phosphate fertilizer plant in Tunisia. Photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (E), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) activities were assessed; along with photosynthetic pigments, lipid peroxidation, electrolytic leakage (EL) and total phenolic contents in foliage and roots of trees at different distances from the phosphate fertilizer plant...
June 19, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28629207/h2o2-as-a-candidate-bottleneck-for-mnp-activity-during-cultivation-of-agaricus-bisporus-in-compost
#12
Aurin M Vos, Edita Jurak, Jordi F Pelkmans, Koen Herman, Gill Pels, Johan J Baars, Ed Hendrix, Mirjam A Kabel, Luis G Lugones, Han A B Wösten
Degradation of lignin by fungi enhances availability of cellulose and hemicellulose in plant waste and thereby increases the amount of carbon source available to these microorganisms. The button mushroom Agaricus bisporus degrades only about half of the lignin in compost and about 40% of the carbohydrates remain unutilized during mushroom cultivation. Here it was assessed whether over-expression of the manganese peroxidase gene mnp1 improves lignin degradation and, as a consequence, carbohydrate breakdown by A...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28627253/protective-effects-of-quercetin-on-nicotine-induced-oxidative-stress-in-hepg2-cells
#13
Amir Yarahmadi, Fatemeh Zal, Ayeh Bolouki
Nicotine is a natural component of tobacco plants and is responsible for the addictive properties of tobacco. Nicotine has been recognized to result in oxidative stress by inducing the generation of reactive oxygen species (ROS). The purpose of this work was to estimate the hepatotoxicity effect of nicotine on viability and on antioxidant defense system in cultures of HepG2 cell line and the other hand, ameliorative effect of querctin (Q) as an antioxidant was analyzed. Nicotine induced concentration dependent loss in HepG2 cell line viability...
June 19, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28624857/bioaccumulation-of-heavy-metals-and-ecophysiological-responses-to-heavy-metal-stress-in-selected-populations-of-vaccinium-myrtillus-l-and-vaccinium-vitis-idaea-l
#14
Marta Kandziora-Ciupa, Aleksandra Nadgórska-Socha, Gabriela Barczyk, Ryszard Ciepał
The aim of this study was to determine the concentrations of heavy metals (Cd, Pb, Zn, Fe, and Mn) in soil, and their bioavailability and bioaccumulation in Vaccinium myrtillus L. and Vaccinium vitis-idaea L. organs. Analysis also concerned the physiological responses of these plants from three polluted sites (immediate vicinity of a zinc smelter in Miasteczko Śląskie, ArcelorMittal Poland S.A. iron smelter in Dąbrowa Górnicza-Łosień, and Jaworzno III power plant in Jaworzno) and one pseudo-control site (Pazurek nature reserve in Jaroszowiec Olkuski)...
June 17, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28624682/effect-of-the-fungus-piriformospora-indica-on-physiological-characteristics-and-root-morphology-of-wheat-under-combined-drought-and-mechanical-stresses
#15
Fatemeh Hosseini, Mohammad Reza Mosaddeghi, Anthony Roger Dexter
This study was done to evaluate the effects of the root-colonizing endophytic fungus Piriformospora indica on wheat growth under combined drought and mechanical stresses. Inoculated (colonized) and non-inoculated (uncolonized) wheat (Triticum aestivum L. cv. Chamran) seedlings were planted in growth chambers filled with moist sand (at a matric suction of 20 hPa). Slight, moderate and severe mechanical stresses (i.e., penetration resistance, Qp, of 1.17, 4.17 and 5.96 MPa, respectively) were produced by a dead-load technique (i...
June 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28624590/maleic-acid-assisted-improvement-of-metal-chelation-and-antioxidant-metabolism-confers-chromium-tolerance-in-brassica-juncea-l
#16
Jubayer Al Mahmud, Mirza Hasanuzzaman, Kamrun Nahar, Anisur Rahman, Md Shahadat Hossain, Masayuki Fujita
Chromium (Cr) is a highly toxic environmental pollutant that negatively affects plant growth and development. Thus, remediating Cr from soil or increasing plant tolerance against Cr stress is urgent. Organic acids are recognized as agents of phytoremediation and as exogenous protectants, but using maleic acid (MA) to attain these results has not yet been studied. Therefore, our study investigated the effects of MA on Cr uptake and mitigation of Cr toxicity. We treated 8-d-old Indian mustard (Brassica juncea L...
June 15, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28624459/overexpression-of-a-bacterial-mercury-transporter-mert-in-arabidopsis-enhances-mercury-tolerance
#17
Sheng Xu, Bin Sun, Rong Wang, Jia He, Bing Xia, Yong Xue, Ren Wang
The phytoremediation by using of green plants in the removal of environmental pollutant is an environment friendly, green technology that is cost effective and energetically inexpensive. By using Agrobacterium-mediated gene transfer, we generated transgenic Arabidopsis plants ectopically expressing mercuric transport protein gene (merT) from Pseudomonas alcaligenes. Compared with wild-type (WT) plants, overexpressing PamerT in Arabidopsis enhanced the tolerance to HgCl2. Further results showed that enhanced total activities or corresponding transcripts of antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT) and guaiacol peroxidase (POD) were observed in transgenic Arabidopsis under HgCl2 stress...
June 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28623507/physiological-characteristics-of-plantago-major-under-so2-exposure-as-affected-by-foliar-iron-spray
#18
Vahid Mohasseli, Amir Hossein Khoshgoftarmanesh, Hossein Shariatmadari
Sulfur dioxide (SO2) is considered as a main air pollutant in industrialized areas that can damage vegetation. In the present study, we investigated how exposure to SO2 and foliar application of iron (Fe) would affect certain physiological characteristics of Plantago major. The plant seedlings exposed or unexposed to SO2 (3900 μg m(-3)) were non-supplemented or supplemented with Fe (3 g L(-1)) as foliar spray. Plants were exposed to SO2 for 6 weeks in 100 × 70 × 70 cm chambers. Fumigation of plants with SO2 was performed for 3 h daily for 3 days per week (alternate day)...
June 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28622459/structural-plasticity-among-glutathione-transferase-phi-members-natural-combination-of-catalytic-residues-confers-dual-biochemical-activities
#19
Henri Pégeot, Sandrine Mathiot, Thomas Perrot, Frédéric Gense, Arnaud Hecker, Claude Didierjean, Nicolas Rouhier
The glutathione transferase (GST) gene family is divided into fourteen classes in photosynthetic organisms. Among them, the Phi class (GSTF) is composed of a large number of genes that are often induced in response to environmental constraints due to their ability to detoxify xenobiotics, to their peroxidase activity and to their involvement in the biosynthesis and/or transport of secondary metabolites. However, the exact functions of GSTFs from many plants including Populus trichocarpa are unknown. Here, following GSTF1 characterization, we have performed a comparative analysis of the seven other GSTFs found in poplar by systematically evaluating the biochemical and enzymatic properties of the corresponding recombinant proteins and of variants mutated for active site residues and by determining the three-dimensional structures of several representatives...
June 16, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28620407/antioxidant-responses-induced-by-uvb-radiation-in-deschampsia-antarctica-desv
#20
Hans Köhler, Rodrigo A Contreras, Marisol Pizarro, Rodrigo Cortés-Antíquera, Gustavo E Zúñiga
Deschampsia antarctica Desv. is one of two vascular plants that live in the Maritime Antarctic Territory and is exposed to high levels of ultraviolet-B (UVB) radiation. In this work, antioxidant physiology of D. antarctica was studied in response to UVB induced oxidative changes. Samples were collected from Antarctica and maintained in vitro culture during 2 years. Plants were sub-cultured in a hydroponic system and exposed to 21.4 kJ m(-2) day(-1), emulating summer Antarctic conditions. Results showed rapid and significant increases in reactive oxygen species (ROS) at 3 h, which rapidly decreased...
2017: Frontiers in Plant Science
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