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https://www.readbyqxmd.com/read/28214191/potential-of-different-am-fungi-native-from-as-contaminated-and-uncontaminated-soils-for-supporting-leucaena-leucocephala-growth-in-as-contaminated-soil
#1
Jerusa Schneider, Jochen Bundschuh, Wesley de Melo Rangel, Luiz Roberto Guimarães Guilherme
Arbuscular mycorrhizal (AM) fungi inoculation is considered a potential biotechnological tool for an eco-friendly remediation of hazardous contaminants. However, the mechanisms explaining how AM fungi attenuate the phytotoxicity of metal(oid)s, in particular arsenic (As), are still not fully understood. The influence of As on plant growth and the antioxidant system was studied in Leucaena leucocephala plants inoculated with different isolates of AM fungi and exposed to increasing concentrations of As (0, 35, and 75 mg dm(-3)) in a Typic Quartzipsamment soil...
February 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28213323/growth-inhibition-and-efficiency-of-the-antioxidant-system-in-spring-barley-and-common-radish-grown-on-soil-polluted-ionic-liquids-with-iodide-anions
#2
Robert Biczak, Martyna Śnioszek, Arkadiusz Telesiński, Barbara Pawłowska
Ionic liquids (ILs) constitute a huge group of substances that are increasingly common in the commercial use. This situation may lead to the contamination of the soil environment which being the basic of plants vegetation. This paper presents the effect of four ILs with I(-) anion on the growth and development of spring barley (Hordeum vulgare) and common radish (Raphanus sativus L. subvar. radicula Pers) and changes in metabolism of the plants. Seedlings of spring barley and common radish cultivated on soil with increasing ILs concentration exhibited typical phytotoxicity symptoms...
February 14, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28209137/transcriptional-analysis-of-defense-mechanisms-in-upland-tetraploid-switchgrass-to-greenbugs
#3
Teresa Donze-Reiner, Nathan A Palmer, Erin D Scully, Travis J Prochaska, Kyle G Koch, Tiffany Heng-Moss, Jeffrey D Bradshaw, Paul Twigg, Keenan Amundsen, Scott E Sattler, Gautam Sarath
BACKGROUND: Aphid infestation of switchgrass (Panicum virgatum) has the potential to reduce yields and biomass quality. Although switchgrass-greenbug (Schizaphis graminum; GB) interactions have been studied at the whole plant level, little information is available on plant defense responses at the molecular level. RESULTS: The global transcriptomic response of switchgrass cv Summer to GB was monitored by RNA-Seq in infested and control (uninfested) plants harvested at 5, 10, and 15 days after infestation (DAI)...
February 16, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28207772/triticum-aestivum-wrab18-functions-in-plastids-and-confers-abiotic-stress-tolerance-when-overexpressed-in-escherichia-coli-and-nicotiania-benthamiana
#4
Xiaoyu Wang, Linsheng Zhang, Yane Zhang, Zhenqing Bai, Hao Liu, Dapeng Zhang
WRAB18, an ABA-inducible protein belongs to the third family of late embryogenesis abundant (LEA) proteins which can be induced by different biotic or abiotic stresses. In the present study, WRAB18 was cloned from the Zhengyin 1 cultivar of Triticum aestivum and overexpressed in Escherichia coli to explore its effects on the growth of E. coli under different abiotic stresses. Results suggested the enhanced exhibition of tolerance of E. coli to these stresses. Meanwhile, the WRAB18-transgenic tobacco plants were obtained to analyze the stress-related enzymatic activities of ascorbate peroxidase (APX), peroxidase (POD) and superoxide dismutase (SOD), and to quantify the content of malonaldehyde (MDA) under osmotic stress, high salinity, and low and high temperature stress...
2017: PloS One
https://www.readbyqxmd.com/read/28198206/nitraria-retusa-fruit-prevents-penconazole-induced-kidney-injury-in-adult-rats-through-modulation-of-oxidative-stress-and-histopathological-changes
#5
Mariem Chaâbane, Mohamed Koubaa, Nejla Soudani, Awatef Elwej, Malek Grati, Kamel Jamoussi, Tahia Boudawara, Semia Ellouze Chaabouni, Najiba Zeghal
CONTEXT: Nitraria retusa (Forssk.) Asch. (Nitrariaceae) is a medicinal plant which produces edible fruits whose antioxidant activity has been demonstrated. OBJECTIVE: The current study elucidates the potential protective effect of N. retusa fruit aqueous extract against nephrotoxicity induced by penconazole, a triazole fungicide, in the kidney of adult rats. MATERIALS AND METHODS: Adult Wistar rats were exposed either to penconazole (67 mg/kg body weight), or to N...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28197170/glutathionylation-of-pea-chloroplast-2-cys-prx-and-mitochondrial-prx-iif-affects-their-structure-and-peroxidase-activity-and-sulfiredoxin-deglutathionylates-only-the-2-cys-prx
#6
Aingeru Calderón, Alfonso Lázaro-Payo, Iván Iglesias-Baena, Daymi Camejo, Juan J Lázaro, Francisca Sevilla, Ana Jiménez
Together with thioredoxins (Trxs), plant peroxiredoxins (Prxs), and sulfiredoxins (Srxs) are involved in antioxidant defense and redox signaling, while their regulation by post-translational modifications (PTMs) is increasingly regarded as a key component for the transduction of the bioactivity of reactive oxygen and nitrogen species. Among these PTMs, S-glutathionylation is considered a protective mechanism against overoxidation, it also modulates protein activity and allows signaling. This study explores the glutathionylation of recombinant chloroplastic 2-Cys Prx and mitochondrial Prx IIF from Pisum sativum...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28195581/cultivation-and-characterization-of-candidatus-nitrosocosmicus-exaquare-an-ammonia-oxidizing-archaeon-from-a-municipal-wastewater-treatment-system
#7
Laura A Sauder, Mads Albertsen, Katja Engel, Jasmin Schwarz, Per H Nielsen, Michael Wagner, Josh D Neufeld
Thaumarchaeota have been detected in several industrial and municipal wastewater treatment plants (WWTPs), despite the fact that ammonia-oxidizing archaea (AOA) are thought to be adapted to low ammonia environments. However, the activity, physiology and metabolism of WWTP-associated AOA remain poorly understood. We report the cultivation and complete genome sequence of Candidatus Nitrosocosmicus exaquare, a novel AOA representative from a municipal WWTP in Guelph, Ontario (Canada). In enrichment culture, Ca...
February 14, 2017: ISME Journal
https://www.readbyqxmd.com/read/28193486/post-translational-modifications-of-medicago-truncatula-glutathione-peroxidase-1-induced-by-nitric-oxide
#8
Claude Castella, Ioanna Mirtziou, Aurélie Seassau, Alexandre Boscari, Françoise Montrichard, Kalliopi Papadopoulou, Nicolas Rouhier, Alain Puppo, Renaud Brouquisse
Plant glutathione peroxidases (Gpx) catalyse the reduction of various peroxides, such as hydrogen peroxide (H2O2), phospholipid hydroperoxides and peroxynitrite, but at the expense of thioredoxins rather than glutathione. A main function of plant Gpxs is the protection of biological membranes by scavenging phospholipid hydroperoxides, but some Gpxs have also been associated with H2O2 sensing and redox signal transduction. Nitric oxide (NO) is not only known to induce the expression of Gpx family members, but also to inhibit Gpx activity, presumably through the S-nitrosylation of conserved cysteine residues...
February 10, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28175992/early-plant-defence-against-insect-attack-involvement-of-reactive-oxygen-species-in-plant-responses-to-insect-egg-deposition
#9
Norbert Bittner, Ute Trauer-Kizilelma, Monika Hilker
Pinus sylvestris responds to insect egg deposition by ROS accumulation linked with reduced activity of the ROS scavenger catalase. Egg mortality in needles with hypersensitive response (HR)-like symptoms is enhanced. Aggressive reactive oxygen species (ROS) play an important role in plant defence against biotic stressors, including herbivorous insects. Plants may even generate ROS in response to insect eggs, thus effectively fighting against future larval herbivory. However, so far nothing is known on how ROS-mediated plant defence against insect eggs is enzymatically regulated...
February 7, 2017: Planta
https://www.readbyqxmd.com/read/28174590/modulating-atdreb1c-expression-improves-drought-tolerance-in-salvia-miltiorrhiza
#10
Tao Wei, Kejun Deng, Qingxia Zhang, Yonghong Gao, Yu Liu, Meiling Yang, Lipeng Zhang, Xuelian Zheng, Chunguo Wang, Zhiwei Liu, Chengbin Chen, Yong Zhang
Dehydration responsive element binding proteins are transcription factors of the plant-specific AP2 family, many of which contribute to abiotic stress responses in several plant species. We investigated the possibility of increasing drought tolerance in the traditional Chinese medicinal herb, Salvia miltiorrhiza, through modulating the transcriptional regulation of AtDREB1C in transgenic plants under the control of a constitutive (35S) or drought-inducible (RD29A) promoter. AtDREB1C transgenic S. miltiorrhiza plants showed increased survival under severe drought conditions compared to the non-transgenic wild-type (WT) control...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28169318/effect-of-exogenous-selenium-supply-on-photosynthesis-na-accumulation-and-antioxidative-capacity-of-maize-zea-mays-l-under-salinity-stress
#11
Chaoqiang Jiang, Chaolong Zu, Dianjun Lu, Qingsong Zheng, Jia Shen, Huoyan Wang, Decheng Li
The mechanism of selenium-mediated salt tolerance has not been fully clarified. This study investigated the possible role of selenium (Se) in regulating maize salt tolerance. A pot experiment was conducted to investigate the role of Se (0, 1, 5 and 25 μM Na2SeO3) in photosynthesis, antioxidative capacity and ion homeostasis in maize under salinity. The results showed that Se (1 μM) relieved the salt-induced inhibitory effects on the plant growth and development of 15-day-old maize plants. Se application (1 μM) also increased the net photosynthetic rate and alleviated the damage to chloroplast ultrastructure induced by NaCl...
February 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28167043/a-role-for-apx1-gene-in-lead-tolerance-in-arabidopsis-thaliana
#12
Li Jiang, Weiyan Wang, Ziping Chen, Qiuchen Gao, Qixin Xu, Haimei Cao
Lead (Pb) is a dangerous and widespread metal pollutant. Numerous studies have been made in understanding heavy metal detoxification and tolerance in plants, however, relatively few are known about the mechanisms involved in Pb stress response. In this study, we provide evidence for a novel role of APX1 gene in Pb tolerance in Arabidopsis. KO-APX1 mutants apx1-3 and apx1-4 showed more resistant than wild type, and the APX1-complementary COM1 restored the growth state of wild type in Pb stress. The two KO-APX1 mutants showed reduced Pb accumulation, which was accompanied by the activation of metal transporters PDR12 and ATM3 genes expression...
March 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28166421/vitamin-e-and-selenium-treatment-of-monocrotaline-induced-hepatotoxicity-in-rats
#13
G Cuce, H T Canbaz, M E Sozen, F H Yerlikaya, S Kalkan
Monocrotaline (MCT) is a hepatotoxic pyrrolizidine alkaloid that is derived from plants; exposure may occur by consumption of contaminated grains, herbal teas and medicines. MCT can cause liver damage. We investigated the antioxidant effects of selenium (Se) and vitamin E against the toxic effects of MCT. Female Wistar albino rats were divided into four groups: a control group, an MCT group, an MCT + Se group, and an MCT + vitamin E group. Liver tissues were harvested, fixed, processed to paraffin and sections were cut...
February 6, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28163957/geraniol-attenuates-hydrogen-peroxide-induced-liver-fatty-acid-alterations-in-male-rats
#14
Ahmet Ozkaya, Zafer Sahin, Ahmet Orhan Gorgulu, Abdurrauf Yuce, Sait Celik
BACKGROUND: Hydrogen peroxide (H2O2) is an oxidant agent and this molecule naturally occurs in the body as a product of aerobic metabolism. Geraniol is a plant-derived natural antioxidant. The aim of this study was to determine the role of geraniol on hepatic fatty acids alterations following H2O2-induced oxidative stress in male rats. METHODS: After randomization, male Wistar rats were divided into four groups (n = 7 each group). Geraniol (50 mg/kg, dissolved in corn oil) and H2O2 (16 mg/kg, dissolved in distilled water) were administered by an intraperitoneal injection...
January 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28161646/adjustments-in-cam-and-enzymatic-scavenging-of-h2o2-in-juvenile-plants-of-the-epiphytic-bromeliad-guzmania-monostachia-as-affected-by-drought-and-rewatering
#15
Victória Carvalho, Maria E Abreu, Helenice Mercier, Catarina C Nievola
Juvenile plants of epiphytes such as bromeliads are highly prone to dehydration under drought conditions. It is likely that young epiphytes evolved mostly metabolic strategies to resist drought, which may include the plastic modulation of the enzymatic antioxidant system and crassulacean acid metabolism (CAM). Few studies have investigated such strategies in juvenile epiphytes, although such research is important to understand how these plants might face drought intensification derived from potential climatic alterations...
January 28, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28157580/physiological-highlights-of-manganese-toxicity-symptoms-in-soybean-plants-mn-toxicity-responses
#16
Elcio Ferreira Santos, José Mateus Kondo Santini, Amanda Pereira Paixão, Enes Furlani Júnior, José Lavres, Marcelo Campos, André Rodrigues Dos Reis
Manganese (Mn) is an essential element for plants; however, high concentrations in certain soil conditions can cause toxicity symptoms in the plant tissue. Here, we describe Mn toxicity symptoms and Mn toxicity responses in soybean plants. Soybean plants exposed to excess Mn showed reductions in the CO2 assimilation rate and stomatal conductance, which in turn resulted in decreased shoot biomass. Furthermore, peroxidase (POD), superoxide dismutase (SOD), and catalase (CAT) activity were higher in plants grown with the highest Mn concentration...
January 25, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28154803/involvement-of-cross-reactive-carbohydrate-determinants-specific-ige-in-pollen-allergy-testing
#17
Hidenori Yokoi, Hiroshi Yoshitake, Yuma Matsumoto, Michitsugu Kawada, Yoshiki Takato, Kiyomi Shinagawa, Hiroyuki Sakurai, Koichiro Saito
BACKGROUND: Specific IgE antibodies against the low-molecular-weight carbohydrate antigen that does not bridge IgE molecules on mast cells are not associated with clinical symptoms. Cross reactivity can be determined in allergen-specific IgE detection assays when the carbohydrate structures between pollen allergens and plant derived food allergens are similar; in such cases, false positive results for grain or legume allergens can be reported for pollen allergic patients who are not sensitized to those allergens...
January 2017: Asia Pacific Allergy
https://www.readbyqxmd.com/read/28152474/hepatoprotective-role-of-ricinus-communis-leaf-extract-against-d-galactosamine-induced-acute-hepatitis-in-albino-rats
#18
Pappithi Ramesh Babu, Cherukupalle Bhuvaneswar, Gandham Sandeep, Chintha Venkata Ramaiah, Wudayagiri Rajendra
Ricinus communis (RC) is a traditional medicinal plant which has been used by Chenchu and Yerukula tribes for treating their liver ailments. The present work is aimed to explore the hepatoprotective efficacy of Ricinus communis against d-galactosamine (D-GalN) induced hepatitis rat model and its therapeutic potential compared with standard drug, silymarin (100mg/kg.bw). In vitro antioxidant activity of Methanolic extract of Ricinus communis leaves (MERCL) was assayed through DPPH and H2O2 free radical scavenging activity...
January 30, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28150172/overexpression-of-the-ascorbate-peroxidase-gene-from-eggplant-and-sponge-gourd-enhances-flood-tolerance-in-transgenic-arabidopsis
#19
Chih-Ming Chiang, Chiu-Chen Chen, Shi-Peng Chen, Kuan-Hung Lin, Li-Ru Chen, Yu-Huei Su, His-Cheng Yen
Previously, we found that the flood resistance of eggplant (Solanum melongena) and sponge gourd (Luffa cylindrica) enhanced ascorbate peroxidase (APX) activity under flooding, and consequently, both the SmAPX and LcAPX genes were cloned. In this study, the SmAPX and LcAPX genes were transferred under a ubiquitin promoter to Arabidopsis (At) via Agrobacterium tumefaciens. The expression and amount of APX and APX activities of the SmAPX and LcAPX transgenic lines were significantly higher than those of non-transgenic (NT) plants under a waterlogged condition...
February 1, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28150144/p-hydroxyacetophenone-suppresses-nuclear-factor-%C3%AE%C2%BAb-related-inflammation-in-nociceptive-and-inflammatory-animal-models
#20
Chang Ching-Wen, Chen Yun-Chieh, Lin Yu-Chin, Peng Wen-Huang
p-Hydroxyacetophenone (HAP) is a crucial chemical compound present in plants of the genus Artemisia, which are used in traditional therapies for treating jaundice, hepatitis, and inflammatory diseases. Nevertheless, the bioactivity of HAP remains to be identified in order to prove its importance in the plants of genus Artemisia. This study investigated the antioxidative, antinociceptive, and anti-inflammatory effects of HAP, and probed its possible molecular mechanisms. Our results revealed that HAP (80 mg/kg, intraperitoneally) in vivo reduced the acetic acid-induced writhing response and formalin-induced licking time...
February 1, 2017: Journal of Natural Medicines
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