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https://www.readbyqxmd.com/read/29035772/effect-of-lignite-on-alleviation-of-salt-toxicity-in-soybean-glycine-max-l-plants
#1
Salar Farhangi-Abriz, Neda Nikpour-Rashidabad
Salt toxicity of agricultural land is a natural phenomenon which is due to agricultural irrigation. This toxicity is harmful to crop productivity via increasing oxidative stress products. In a factorial controlled trial, four levels of lignite-enriched soil (soil lignite content: none, 50, 75 and 100 g kg(-1)) were exposed to three levels of soil salinity (0, 5 and 10 dS m(-1) NaCl). Then reactive oxygen species (ROS) generation (hydrogen peroxide and superoxide radical), lipid peroxidation, antioxidant enzymes activities (peroxidase, catalase and super oxide dismutase), proline, glycine betaine, soluble sugars and soluble protein contents of soybean plants were compared across different lignite concentration and saline toxicity...
October 12, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29034202/wound-healing-potentials-of-thevetia-peruviana-antioxidants-and-inflammatory-markers-criteria
#2
Nazneen Rahman, Haseebur Rahman, Mir Haris, Riaz Mahmood
Thevetia peruviana is a medicinal plant used in the treatment of external wounds, infected area, ring worms, tumours etc. in traditional system of medicine. The aim of the study was to evaluate the wound healing potentials of T. peruviana leaves hexane (LH) and fruit rind (FW) water extracts and to prove the folkloric claims. The antimicrobial, antioxidant and anti-inflammatory potentials could be important strategies in defining potent wound healing drug. Based on these approaches the current study was designed using incision, excision and dead space wound models with the biochemical, antioxidant enzymes and inflammatory marker analysis...
October 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29033963/convergent-evolution-of-pathogen-effectors-toward-reactive-oxygen-species-signaling-networks-in-plants
#3
REVIEW
Nam-Soo Jwa, Byung Kook Hwang
Microbial pathogens have evolved protein effectors to promote virulence and cause disease in host plants. Pathogen effectors delivered into plant cells suppress plant immune responses and modulate host metabolism to support the infection processes of pathogens. Reactive oxygen species (ROS) act as cellular signaling molecules to trigger plant immune responses, such as pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity. In this review, we discuss recent insights into the molecular functions of pathogen effectors that target multiple steps in the ROS signaling pathway in plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29032425/heterologous-expression-of-wheat-tarub1-gene-enhances-disease-resistance-in-arabidopsis-thaliana
#4
Yanlin Yang, Wenqiang Wang, Tian Xu, Na Liu, Honggang Wang, Deshun Feng
Expression of TaRUB1 gene in Arabidopsis thaliana elevates the level of disease-related genes in response to pathogen invasion through the accumulation of callose, necrotic cells, and the outbreak of ROS. Ubiquitin (Ub) and ubiquitin-like proteins are highly conserved in sequence and can covalently bind and modify many intracellular proteins which can be recognized and degraded by 26S proteasome. Post-translational modification of proteins has become a hot research spot today. In the previous study, a cDNA of related-to-ubiquitin protein belonged to ubiquitin-like proteins, whose spatial structure comprised Ub and NEDD8, was obtained from wheat SN6306 by suppression-subtractive hybridization and was named TaRUB1...
October 14, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/29031208/phytoecdysteroids-from-ajuga-iva-act-as-potential-antidiabetic-agent-against-alloxan-induced-diabetic-male-albino-rats
#5
Jin-Jun Wang, Hao Jin, Shao-Ling Zheng, Peng Xia, Yong Cai, Xiao-Jie Ni
The present study investigated the protective effect of phytoecdysteroids extracted from the Ajuga iva plant on body weight changes, blood glucose, insulin total protein, blood urea nitrogen (BUN), creatinine, triglycerides (TG), cholesterol, lipid peroxidation, antioxidant enzymes, pancreatic histopathology and hexokinase-I expression in the alloxan-induced diabetic rats. Experimental diabetes was induced following 15day intraperitoneal administration of alloxan. The rats were divided into four groups. Group I served as a sham group, and group II served as the diabetic control...
October 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29031056/physiological-and-biochemical-responses-of-wheat-triticum-aestivum-l-seedlings-to-three-imidazolium-based-ionic-liquids-in-soil
#6
Yaqi Xu, Jun Wang, Lusheng Zhu, Zhongkun Du, Jinhua Wang, Kai Wei
Ionic liquids (ILs) are considered environmentally friendly solvents and are widely applied in various fields; however, some researchers have noted the toxicity of ILs to plants cultivated in nutrient solution. To evaluate the toxicities of ILs to wheat seedlings in soil, the natural growth environment of plants, a study was performed using three imidazolium-based ionic liquids with different anions: 1-octyl-3-methylimidazolium chloride ([C8mim]Cl), 1-octyl-3-methylimidazolium bromide ([C8mim]Br) and 1-octyl-3-methylimidazolium tetrafluoroborate ([C8mim]BF4)...
September 25, 2017: Chemosphere
https://www.readbyqxmd.com/read/29028538/nitric-oxide-induces-rice-tolerance-to-excessive-nickel-by-regulating-nickel-uptake-reactive-oxygen-species-detoxification-and-defense-related-gene-expression
#7
Muhammad Rizwan, Mohammad Golam Mostofa, Muhammad Zulfiqar Ahmad, Muhammad Imtiaz, Sajid Mehmood, Muhammad Adeel, Zhihua Dai, Zheyong Li, Omar Aziz, Yihui Zhang, Shuxin Tu
Soil contamination with nickel (Ni) is a persistent threat to crop production worldwide. The present study examined the putative roles of nitric oxide (NO) in improving Ni-tolerance in rice. Our findings showed that application of exogenous sodium nitroprusside (SNP), a NO donor, significantly improved the growth performance of rice seedlings when grown under excessive Ni. The enhanced Ni-tolerance of rice prompted by SNP could be ascribed to its ability to regulate Ni uptake, decrease Ni-induced oxidative stress as evidenced by reduced levels of hydrogen peroxide, malondialdehyde, and electrolyte leakage in Ni-stressed plants...
September 30, 2017: Chemosphere
https://www.readbyqxmd.com/read/29027659/a-novel-cotton-wrky-gene-ghwrky6-like-improves-salt-tolerance-by-activating-the-aba-signalling-pathway-and-scavenging-of-reactive-oxygen-species
#8
Abid Ullah, Heng Sun, Hakim, Xiyan Yang, Xianlong Zhang
WRKY transcription factors are transcriptional regulators of signalling pathways involved in biotic and abiotic stress responses. In this study, we report that ectopic expression of the GhWRKY6-like gene significantly improved salt tolerance in Arabidopsis while silencing the GhWRKY6-like increase the sensitivity to abiotic stresses in cotton. GhWRKY6-like was localized to the nucleus. Expression of GhWRKY6-like was remarkably induced by salt, ethylene glycol (PEG) and abscisic acid (ABA) treatments. For further characterization, the GhWRKY6-like gene was cloned and transformed into Arabidopsis...
October 13, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29027503/antioxidant-effect-of-aromatic-volatiles-emitted-by-lavandula-dentata-mentha-spicata-and-m-piperita-on-mouse-subjected-to-low-oxygen-condition
#9
Zenghui Hu, Chunling Wang, Hong Shen, Kezhong Zhang, Pingsheng Leng
This study aims to investigate the antioxidant effect of aromatic volatiles of three common aromatic plants, Lavandula dentata, Mentha spicata, and M. piperita. In this study, kunming mice subjected to low oxygen condition were treated with the volatiles emitted from these aromatic plants through inhalation administration. Then the blood cell counts, and the activities and gene expressions of antioxidant enzymes in different tissues were tested. The results showed that low oxygen increased the counts of red blood cells, white blood cells, and blood platelets of mice, and aromatic volatiles decreased their counts...
October 13, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/29027091/walnut-supplementation-reverses-the-scopolamine-induced-memory-impairment-by-restoration-of-cholinergic-function-via-mitigating-oxidative-stress-in-rats-a-potential-therapeutic-intervention-for-age-related-neurodegenerative-disorders
#10
Saida Haider, Zehra Batool, Saara Ahmad, Rafat Ali Siddiqui, Darakhshan Jabeen Haleem
The brain is highly susceptible to the damaging effects of oxidative reactive species. The free radicals which are produced as a consequence of aerobic respiration can cause cumulative oxygen damage which may lead to age-related neurodegeneration. Scopolamine, the anti-muscarinic agent induces amnesia and oxidative stress similar to that observed in the older age. Studies suggest that antioxidants derived from plant products may provide protection against oxidative stress. Therefore, the present study was designed to investigate the attenuation of scopolamine-induced memory impairment and oxidative stress by walnut supplementation in rats...
October 12, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29022073/the-contribution-of-cell-wall-composition-in-the-expansion-of-camellia-sinensis-seedlings-roots-in-response-to-aluminum
#11
Masoumeh Safari, Faezeh Ghanati, Mohammad Reza Safarnejad, Najmeh Ahmadian Chashmi
Treatment with aluminum triggers a unique response in tea seedlings resulting in biochemical modification of the cell wall, regulation of the activity of the loosening agents, and elongation of root. Unlike most terrestrial plants, tea (Camellia sinensis L.) responds to aluminum (Al) through the promotion of its root elongation; but the real mechanism(s) behind this phenomenon is not well understood. A plausible relationship between the modifications of the cell wall and the promotion of root elongation was examined in tea seedlings treated for 8 days with 400 µM Al...
October 11, 2017: Planta
https://www.readbyqxmd.com/read/29021804/calcium-and-calmodulin-are-involved-in-nitric-oxide-induced-adventitious-rooting-of-cucumber-under-simulated-osmotic-stress
#12
Lijuan Niu, Jian Yu, Weibiao Liao, Jihua Yu, Meiling Zhang, Mohammed M Dawuda
Osmotic stress is a major form of abiotic stress that adversely affects growth and development of plants and subsequently reduces yield and quality of crops. In this study, the effect of nitric oxide (NO) and calcium (Ca(2+)) on the process of adventitious rooting in cucumber (Cucumis sativus L.) under simulated osmotic stress was investigated. The results revealed that the effect of exogenous NO and Ca(2+) in promoting the development of adventitious roots in cucumber seedlings under simulated osmotic stress was dose-dependent, with a maximal biological response at 10 μM NO donor nitroprusside (SNP) or 200 μM Ca(2+)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29021800/strigolactones-improve-plant-growth-photosynthesis-and-alleviate-oxidative-stress-under-salinity-in-rapeseed-brassica-napus-l-by-regulating-gene-expression
#13
Ni Ma, Chao Hu, Lin Wan, Qiong Hu, Junlan Xiong, Chunlei Zhang
Rapeseed (Brassica napus L.) is a very important edible oil crop in the world, and the production is inhibited by abiotic stresses, such as salinity. Plant hormones can alleviate the stress by regulating the physiological processes and gene expression. To study the plant responses to salinity in combination with GR24, a synthesized strigolactone, the oilseed rape variety (Zhongshuang 11) replications were grown in the pots in a controlled growth chamber under three levels of salinity (0, 100, and 200 mM NaCl) and 0...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29016915/drought-tolerance-conferred-in-soybean-glycine-max-l-by-gmmyb84-a-novel-r2r3-myb-transcription-factor
#14
Nan Wang, Wenxiao Zhang, Mengyin Qin, Shuo Li, Meng Qiao, Zhenhua Liu, Fengning Xiang
MYB-type transcription factors (MYB TFs) play diverse roles in plant development and stress responses. However, the mechanisms underlying the actions of MYB TFs during stress response remain unclear. In this study we identified a R2R3-MYB TF in soybean (Glycine max), denoted GmMYB84, which contributes to drought resistance. Expression of GmMYB84 was induced by drought, salt stress, H2O2 and ABA. Compared with wild-type (WT), GmMYB84-overexpressing soybean mutants (OE lines) exhibited enhanced drought resistance with higher survival rate, longer primary root length, greater proline and reactive oxygen species (ROS) contents, higher antioxidant enzyme activities [peroxidase (POD), catalase (CAT), and superoxide dismutase (SOD)], a lower dehydration rate, and reduced malondialdehyde (MDA) content...
August 9, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29016127/aluminum-induces-distinct-changes-in-the-metabolism-of-reactive-oxygen-and-nitrogen-species-in-the-roots-of-two-wheat-genotypes-with-different-aluminum-resistance
#15
Chengliang Sun, Lijuan Liu, Weiwei Zhou, Lingli Lu, Chongwei Jin, Xianyong Lin
Aluminum (Al) toxicity in acid soils is a primary factor limiting plant growth and crop yield worldwide. Considerable genotypic variation in resistance to Al toxicity has been observed in many crop species. In wheat (Triticum aestivum L.), Al phytotoxicity is a complex phenomenon involving multiple physiological mechanisms which are yet to be fully characterized. To elucidate the physiological and molecular basis of Al toxicity in wheat, we performed a detailed analysis of reactive oxygen species (ROS) and reactive nitrogen species (RNS) under Al stress in one Al-tolerant (Jian-864) and one Al-sensitive (Yang-5) genotype...
October 10, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28992607/effect-of-uv-radiation-and-its-implications-on-carotenoid-pathway-in-bixa-orellana-l
#16
M Sankari, H Hridya, P Sneha, C George Priya Doss, Siva Ramamoorthy
The current study was undertaken to analyse the effect of short-term UV-B and UV-C radiations in provoking carotenoid biosynthesis in Bixa orellana. Seeds of B. orellana were germinated and exposed to the short term UV pre-treatment under controlled environmental condition for 5days. The UV treated young seedlings response in pigment contents; antioxidant enzyme activity and mRNA gene expression level were analysed. The pigment content such as chlorophyll was increased in both UV-B and UV-C treated seedlings, but the total carotenoid level was decreased when compared to the control seedlings this can be attributed to the plant adaptability to survive in a stressed condition...
October 2, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28987862/overexpressing-sweetpotato-peroxidase-gene-swpa4-affects-nitric-oxide-production-by-activating-the-expression-of-reactive-oxygen-species-and-nitric-oxide-related-genes-in-tobacco
#17
Yun-Hee Kim, Sung Chul Park, Byung-Wook Yun, Sang-Soo Kwak
Reactive oxygen species (ROS) and nitric oxide (NO) are key signaling molecules involved in various developmental and stress responses in plants. NO and ROS production, which is triggered by various stimuli, activates downstream signaling pathways to help plants cope with abiotic and biotic stresses. Recent evidence suggests that the interplay between NO and ROS signaling plays a critical role in regulating stress responses. However, the underlying molecular mechanism remains poorly understood. We previously reported that transgenic tobacco overexpressing the swpa4 peroxidase (POD) gene from sweetpotato exhibits increased tolerance to stress...
September 28, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28985588/inter-and-intra-specific-competition-of-duckweed-under-multiple-heavy-metal-contaminated-water
#18
Zhao Zhao, Huijuan Shi, Xianjiang Kang, Cunqi Liu, Lingci Chen, Xiaofei Liang, Lei Jin
The influences of intra- and inter-species competition on ecosystems are poorly understood. Lemna aequinoctialis and Spirodela polyrhiza were used to assess the effects of exposure to different concentrations of multiple heavy metals (copper-cadmium-zinc), when the plants were grown in mixed- or mono-culture. Parameters assessed included relative growth rate (RGR), content of chlorophyll, glutathione (GSH), malondialdehyde (MDA), as well as the activity of catalase (CAT), superoxide dismutase (SOD) and peroxidase (POD)...
September 27, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28983254/salicylic-acid-regulated-antioxidant-mechanisms-and-gene-expression-enhance-rosemary-performance-under-saline-conditions
#19
Mohamed A El-Esawi, Hosam O Elansary, Nader A El-Shanhorey, Amal M E Abdel-Hamid, Hayssam M Ali, Mohamed S Elshikh
Salinity stress as a major agricultural limiting factor may influence the chemical composition and bioactivity of Rosmarinus officinallis L. essential oils and leaf extracts. The application of salicylic acid (SA) hormone may alleviate salinity stress by modifying the chemical composition, gene expression and bioactivity of plant secondary metabolites. In this study, SA was applied to enhance salinity tolerance in R. officinallis. R. officinallis plants were subjected to saline water every 2 days (640, 2,000, and 4,000 ppm NaCl) and 4 biweekly sprays of SA at 0, 100, 200, and 300 ppm for 8 weeks...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28975545/heterologous-expression-purification-and-characterization-of-a-peroxidase-isolated-from-lepidium-draba
#20
Yaser Fattahian, Ali Riahi-Madvar, Reza Mirzaee, Masoud Torkzadeh-Mahani, Gholamreza Asadikaram
Peroxidase is one of the most widely used enzymes in biotechnology and medicine. In the current study, cDNA encoding peroxidase from Lepidium draba (LDP) was cloned and expressed in Escherichia coli BL21 (DE3) cells in the form of inclusion bodies (IBs). To achieve purified active enzyme, IBs were solubilized before being purified and refolded. The deduced amino acid sequence (308) of the LDP gene (924 bp) revealed 88.96% identity to horseradish peroxidase C1A (HRP C1A). The results of basic local alignment search tool (BLAST) and phylogenetic analysis of the protein sequence showed that this enzyme belongs to the neutral group of class III plant peroxidases...
October 3, 2017: Protein Journal
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