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https://www.readbyqxmd.com/read/27924121/overexpression-of-panax-ginseng-sesquiterpene-synthase-gene-confers-tolerance-against-pseudomonas-syringae-pv-tomato-in-arabidopsis-thaliana
#1
Sung-Joo Yoon, Johan Sukweenadhi, Altanzul Khorolragchaa, Ramya Mathiyalagan, Sathiyamoorthy Subramaniyam, Yeon-Ju Kim, Ho-Bin Kim, Mi-Jung Kim, Yu-Jin Kim, Deok-Chun Yang
Sesquiterpenes are an abundant group belonging to the terpenoid family, with a C15 structure comprise of three isoprene units. Many sesquiterpenes are volatile compounds and it act as chemical messenger in plant signalling, particularly in the defense mechanism against biotic and abiotic stresses. Panax ginseng Meyer is important medicinal herbs with various reported pharmacological efficacies in which its triterpenoid saponins, called ginsenosides, were mostly studied. However, there have been few studies on volatile sesquiterpenes compounds regulation on P...
October 2016: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/27923986/defense-responses-in-aspen-with-altered-pectin-methylesterase-activity-reveal-the-hormonal-inducers-of-tyloses
#2
Joanna Leśniewska, David Öhman, Magdalena Krzesłowska, Sunita Kushwah, Maria Barciszewska-Pacak, Leszek Kleczkowski, Bjorn Sundberg, Thomas Moritz, Ewa J Mellerowicz
Tyloses are ingrowths of parenchyma cells into the lumen of embolized xylem vessels, thereby protecting the remaining xylem from pathogens. They are found in heartwood, sapwood and in abscission zones, and can be induced by various stresses, but their molecular triggers are unknown. Here we report that down-regulation of PECTIN METHYLESTERASE 1 (PtxtPME1) in aspen triggers the formation of tyloses and activation of oxidative stress. We tested whether any of the oxidative-stress related hormones could induce tyloses in intact plantlets grown in sterile culture...
December 6, 2016: Plant Physiology
https://www.readbyqxmd.com/read/27918246/rice-leaf-transcriptional-profiling-suggests-a-functional-interplay-between-xanthomonas-oryzae-pv-oryzae-lipopolysaccharide-and-extracellular-polysaccharide-in-modulation-of-defense-responses-during-infection
#3
Anil Madhusoodana Girija, Bipin Kumar Kumar, Madhavi B Mylavarapu, Palaparthi Ramesh, Sridivya Vungarala, Hitendra Kumar Patel, Ramesh Sonti
Treatment of rice leaves with isolated Xanthomonas oryzae pv. oryzae lipopolysaccharide (LPS) induces the production of callose deposits, reactive oxygen species and enhanced resistance against subsequent bacterial infection. Expression profiling of X. oryzae pv. oryzae LPS treated rice (Oryza sativa ssp. indica) leaves showed that genes involved in the biosynthetic pathways for lignins, phenylpropanoids, chorismate, phenylalanine, salicylic acid and ethylene as well as a number of pathogenesis related proteins are up regulated...
December 5, 2016: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/27916792/elevated-o%C3%A2-and-tylcv-infection-reduce-the-suitability-of-tomato-as-a-host-for-the-whitefly-bemisia-tabaci
#4
Hongying Cui, Yucheng Sun, Fajun Chen, Youjun Zhang, Feng Ge
The effects of elevated atmospheric ozone (O₃) levels on herbivorous insects have been well studied, but little is known about the combined effects of elevated O₃ and virus infection on herbivorous insect performance. Using open-top chambers in the field, we determined the effects of elevated O₃ and Tomato yellow leaf curl virus (TYLCV) infection on wild-type (Wt) tomato and 35S tomato (jasmonic acid (JA) defense-enhanced genotype) in association with whitefly, Bemisia tabaci Gennadius biotype B. Elevated O₃ and TYLCV infection, alone and in combination, significantly reduced the contents of soluble sugars and free amino acids, increased the contents of total phenolics and condensed tannins, and increased salicylic acid (SA) content and the expression of SA-related genes in leaves...
November 28, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27916524/gain-and-loss-of-floral-scent-production-through-changes-in-structural-genes-during-pollinator-mediated-speciation
#5
Avichai Amrad, Michel Moser, Therese Mandel, Michel de Vries, Robert C Schuurink, Loreta Freitas, Cris Kuhlemeier
The interactions of plants with their pollinators are thought to be a driving force in the evolution of angiosperms. Adaptation to a new pollinator involves coordinated changes in multiple floral traits controlled by multiple genes. Surprisingly, such complex genetic shifts have happened numerous times during evolution. Here we report on the genetic basis of the changes in one such trait, floral scent emission, in the genus Petunia (Solanaceae). The increase in the quantity and complexity of the volatiles during the shift from bee to hawkmoth pollination was due to de novo expression of the genes encoding benzoic acid/salicylic acid carboxyl methyltransferase (BSMT) and benzoyl-CoA:benzylalcohol/2-phenylethanol benzoyltransferase (BPBT) together with moderately increased transcript levels for most enzymes of the phenylpropanoid/benzenoid pathway...
November 22, 2016: Current Biology: CB
https://www.readbyqxmd.com/read/27915012/intra-laboratory-validated-human-cell-based-in-vitro-vasculogenesis-angiogenesis-test-with-serum-free-medium
#6
T Toimela, O Huttala, E Sabell, M Mannerström, J R Sarkanen, T Ylikomi, T Heinonen
Vasculogenesis and angiogenesis are the processes by which new blood vessels are formed. We have developed a serum-free human adipose stromal cell and umbilical cord vein endothelial cell based vasculogenesis/angiogenesis test. In this study, the test was validated in our GLP laboratory following the OECD Guidance Document 34 [1] using erlotinib, acetylic salicylic acid, levamisole, 2-methoxyestradiol, anti-VEGF, methimazole, and D-mannitol to show its reproducibility, repeatability, and predictivity for humans...
November 30, 2016: Reproductive Toxicology
https://www.readbyqxmd.com/read/27914935/laboratory-and-field-evaluation-of-brown-dog-tick-behavioral-responses-to-potential-semiochemicals
#7
Lucas P Carnohan, Phillip E Kaufman, Sandra A Allan, Salvador A Gezan, Emma N I Weeks
The brown dog tick, Rhipicephalus sanguineus sensu lato (Parasitiformis: Ixodidae), is an ectoparasite of dogs that can be found worldwide. This tick poses unique difficulties in management because it can complete its entire life cycle indoors and has demonstrated acaricide resistance. The ability to monitor for tick presence and abundance is necessary for developing effective control programs. As such, an evaluation of adult brown dog tick behavioral responses to 16 potential semiochemicals was undertaken using Y-tube and straight-tube olfactometers...
November 9, 2016: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/27912109/characterization-and-fine-mapping-of-a-novel-premature-leaf-senescence-mutant-yellow-leaf-and-dwarf-1-in-rice
#8
Luchang Deng, Peng Qin, Zhi Liu, Geling Wang, Weilan Chen, Jianhua Tong, Langtao Xiao, Bin Tu, Yuantao Sun, Wei Yan, Hang He, Jun Tan, Xuewei Chen, Yuping Wang, Shigui Li, Bingtian Ma
Leaves are the main organs in which photosynthates are produced. Leaf senescence facilitates the translocation of photosynthates and nutrients from source to sink, which is important for plant development and especially for crop yield. However, the molecular mechanism of leaf senescence is unknown. Here, we identified a mutant, yellow leaf and dwarf 1 (yld1), which exhibited decreased plant height and premature leaf senescence. Nitroblue tetrazolium and diamiobenzidine staining analyses revealed that the concentrations of reactive oxygen species were higher in yld1 leaves than in wild type leaves...
November 22, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27907854/raman-spectroscopy-and-capillary-zone-electrophoresis-for-the-analysis-of-degradation-processes-in-commercial-effervescent-tablets-containing-acetylsalicylic-acid-and-ascorbic-acid
#9
Sabine Neuberger, Kevin Jooß, Dirk Flottmann, Gerhard Scriba, Christian Neusüß
In order to ensure the stability of pharmaceutical products appropriate manufacturing and storage conditions are required. In general, the degradation of active pharmaceutical ingredients (APIs) and subsequent formation of degradation products affect the pharmaceutical quality. Thus, a fast and effective detection and characterization of these substances is mandatory. Here, the applicability of Raman spectroscopy and CZE for the characterization of the degradation of effervescent tablets containing acetylsalicylic acid (ASA) and ascorbic acid (AA) was evaluated...
November 15, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27904577/comparison-the-effectiveness-of-pyruvic-acid-50-and-salicylic-acid-30-in-the-treatment-of-acne
#10
Fariba Jaffary, Gita Faghihi, Sara Saraeian, Sayed Mohsen Hosseini
BACKGROUND: Acne vulgaris is a chronic inflammatory disease of the pilosebaceous follicles and one of the most common skin diseases. The peeling method has been recently found to be effective for acne treatment. This study aimed to compare the efficacy of pyruvic acid 50% and salicylic acid 30% peeling in the treatment of mild to moderate acne. MATERIALS AND METHODS: In a prospective single-blinded clinical trial, 86 patients with acne were randomly assigned into two groups...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27898102/a-role-of-the-fuzzy-onions-like-gene-in-regulating-cell-death-and-defense-in-arabidopsis
#11
Arianne Tremblay, Savanna Seabolt, Hongyun Zeng, Chong Zhang, Stefan Böckler, Dominique N Tate, Vy Thuy Duong, Nan Yao, Hua Lu
Programmed cell death (PCD) is critical for development and responses to environmental stimuli in many organisms. FUZZY ONIONS (FZO) proteins in yeast, flies, and mammals are known to affect mitochondrial fusion and function. Arabidopsis FZO-LIKE (FZL) was shown as a chloroplast protein that regulates chloroplast morphology and cell death. We cloned the FZL gene based on the lesion mimic phenotype conferred by an fzl mutation. Here we provide evidence to support that FZL has evolved new function different from its homologs from other organisms...
November 29, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27895225/loss-of-inositol-phosphorylceramide-sphingolipid-mannosylation-induces-plant-immune-responses-and-reduces-cellulose-content-in-arabidopsis
#12
Lin Fang, Toshiki Ishikawa, Emilie A Rennie, Gosia M Murawska, Jeemeng Lao, Jingwei Yan, Alex Yl Tsai, Edward E K Baidoo, Jun Xu, Jay D Keasling, Taku Demura, Maki Kawai-Yamada, Henrik Vibe Scheller, Jenny C Mortimer
Glycosylinositol phosphorylceramides (GIPCs) are a class of glycosylated sphingolipids found in plants, fungi, and protozoa. These lipids are abundant in the plant plasma membrane, forming ~25% of total plasma membrane lipids. Little is known about the function of the glycosylated headgroup, but two recent studies have indicated that they play a key role in plant signaling and defense. Here, we show that a member of glycosyltransferase (GT) family 64, previously named ECTOPICALLY PARTING CELLS1 (EPC1), is likely a Golgi-localized GIPC-specific mannosyl-transferase, which we renamed GIPC MANNOSYL-TRANSFERASE1 (GMT1)...
November 28, 2016: Plant Cell
https://www.readbyqxmd.com/read/27894813/salicylic-acid-retention-impairs-aspirin-reactivity-in-type-2-diabetes
#13
Haowen Zhang, Hao Xie, Xiao Zheng, Yingying Chai, Zhiyuan Tang, Hanyu Chen, Feiyan Li, Heier Christoph, Jiandong Chen, Weixin Sun, Hui Ye, Shiguang Wang, Haiping Hao, Xiaohu Chen
High on-aspirin platelet reactivity (HAPR) has been associated with compromised aspirin efficacy in patients with diabetes suffering from acute cardiovascular events, but the key mechanisms remain elusive. The objective of this study was to uncover the potential link between pathogenic accumulation of salicylic acid (SA), the major metabolite of aspirin, and HAPR in diabetic state. Aspirin failed to inhibit platelet CD62P expression and thromboxane (TX) B2/6-keto-prostaglandin(PG)F1α ratio in a type 2 diabetes mellitus (T2DM) mice model, particularly in the female, which were unanimously accompanied by significantly higher plasma SA concentrations...
November 25, 2016: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27893782/beneficial-effects-of-metformin-and-or-salicylate-on-palmitate-or-tnf%C3%AE-induced-neuroinflammatory-marker-and-neuropeptide-gene-regulation-in-immortalized-npy-agrp-neurons
#14
Wenqing Ye, Ernesto H Ramos, Brian C Wong, Denise D Belsham
Neuropeptide Y (NPY)/Agouti-related peptide (AgRP)-expressing neurons in the hypothalamus induce feeding and decrease energy expenditure. With consumption of a diet high in fat, there is an increase in circulating saturated free fatty acids, including palmitate, leading to the development of neuroinflammation and secretion of cytokines, such as TNFα, and in turn activation of the canonical IKKβ/NFκB cascade. We describe a model of palmitate- and TNFα-induced neuroinflammation in a functionally characterized, immortalized NPY/AgRP-expressing cell model, mHypoE-46, to study whether the anti-diabetic metformin alone or in combination with the anti-inflammatory agent salicylate can ameliorate these detrimental effects...
2016: PloS One
https://www.readbyqxmd.com/read/27893781/salicylic-acid-is-involved-in-the-basal-resistance-of-tomato-plants-to-citrus-exocortis-viroid-and-tomato-spotted-wilt-virus
#15
M Pilar López-Gresa, Purificación Lisón, Lynne Yenush, Vicente Conejero, Ismael Rodrigo, José María Bellés
Tomato plants expressing the NahG transgene, which prevents accumulation of endogenous salicylic acid (SA), were used to study the importance of the SA signalling pathway in basal defence against Citrus Exocortis Viroid (CEVd) or Tomato Spotted Wilt Virus (TSWV). The lack of SA accumulation in the CEVd- or TSWV-infected NahG tomato plants led to an early and dramatic disease phenotype, as compared to that observed in the corresponding parental Money Maker. Addition of acibenzolar-S-methyl, a benzothiadiazole (BTH), which activates the systemic acquired resistance pathway downstream of SA signalling, improves resistance of NahG tomato plants to CEVd and TSWV...
2016: PloS One
https://www.readbyqxmd.com/read/27891171/a-rapid-approach-to-investigate-spatiotemporal-distribution-of-phytohormones-in-rice
#16
Wen-Jing Cai, Tian-Tian Ye, Qing Wang, Bao-Dong Cai, Yu-Qi Feng
BACKGROUND: Phytohormones play crucial roles in almost all stages of plant growth and development. Accurate and simultaneous determination of multiple phytohormones enabled us to better understand the physiological functions and the regulatory networks of phytohormones. However, simultaneous determination of multiple phytohormones in plant is still a challenge due to their low concentrations, structural and chemical diversity, and complex matrix of plant tissues. Therefore, development of a simple and selective method for the simultaneous determination of multiple phytohormones is highly needed...
2016: Plant Methods
https://www.readbyqxmd.com/read/27889668/drug-protein-binding-of-danhong-injection-and-the-potential-influence-of-drug-combination-with-aspirin-insight-by-ultrafiltration-lc-ms-and-molecular-modeling
#17
Junfeng Zhu, Xiaojiao Yi, Peng Huang, Shuqing Chen, Yongjiang Wu
Danhong injection (DHI) is a widely used Chinese medicine injection (CMI) for the clinical treatment of cardiovascular and cerebrovascular diseases. In this study, a simple and efficient in vitro method based on ultrafiltration LC-MS and molecular modeling has been developed to study the human serum albumin (HSA) binding of the compounds in DHI. Seven major components including protocatechuic aldehyde, p-coumaric acid, salvianolic acid D, rosmarinic acid, salvianolic acid E, lithospermic acid and salvianolic acid B were identified as HSA ligands and their binding degrees in the proposed non-saturated model were 26...
November 18, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/27888467/oswrky80-oswrky4-module-as-a-positive-regulatory-circuit-in-rice-resistance-against-rhizoctonia-solani
#18
Xixu Peng, Haihua Wang, Jyan-Chyun Jang, Ting Xiao, Huanhuan He, Dan Jiang, Xinke Tang
BACKGROUND: Plant WRKY transcription factors play pivotal roles in diverse biological processes but most notably in plant defense response to pathogens. Sheath blight represents one of the predominant diseases in rice. However, our knowledge about the functions of WRKY proteins in rice defense against sheath blight is rather limited. RESULTS: Here we demonstrate that the expression of Oryza sativa WRKY80 gene (OsWRKY80) is rapidly and strongly induced upon infection of Rhizoctonia solani, the causal agent of rice sheath blight disease...
December 2016: Rice
https://www.readbyqxmd.com/read/27887027/expansion-of-the-substrate-range-of-the-gentisate-1-2-dioxygenase-from-corynebacterium-glutamicum-for-the-conversion-of-monohydroxylated-benzoates
#19
Erik Eppinger, Andreas Stolz
The gentisate 1,2-dioxygenases (GDOs) from Corynebacterium glutamicum and various other organisms oxidatively cleave the aromatic nucleus of gentisate (2,5-dihydroxybenzoate), but are not able to convert salicylate (2-hydroxybenzoate). In contrast, the α-proteobacterium Pseudaminobacter salicylatoxidans synthesises an enzyme ('salicylate dioxygenase', SDO) which cleaves gentisate, but also (substituted) salicylate(s). Sequence comparisons showed that the SDO belongs to a group of GDOs mainly originating from Gram-positive bacteria which also include the GDO from C...
November 24, 2016: Protein Engineering, Design & Selection: PEDS
https://www.readbyqxmd.com/read/27881989/the-contrasting-effects-of-elevated-co2-on-tylcv-infection-of-tomato-genotypes-with-and-without-the-resistance-gene-mi-1-2
#20
Huijuan Guo, Lichao Huang, Yucheng Sun, Honggang Guo, Feng Ge
Elevated atmospheric CO2 typically enhances photosynthesis of C3 plants and alters primary and secondary metabolites in plant tissue. By modifying the defensive signaling pathways in host plants, elevated CO2 could potentially affect the interactions between plants, viruses, and insects that vector viruses. R gene-mediated resistance in plants represents an efficient and highly specific defense against pathogens and herbivorous insects. The current study determined the effect of elevated CO2 on tomato plants with and without the nematode resistance gene Mi-1...
2016: Frontiers in Plant Science
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