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Salicylic acid

Yanping Chen, Yingjun Chi, Qingchang Meng, Xiaolin Wang, Deyue Yu
In plants, various proteins are regulated by the ubiquitin-mediated system in response to different environmental stresses, such as drought, cold and heat. The Skp1-Cullin-F-box (SCF) complex, one of the multisubunit E3 ligases, has been shown to be involved in abiotic response pathways. In this study, Glycine max SKP1-like 1 (GmSK1), which had the typical characteristics of an SKP1 protein, with an alpha/beta structure, targeted to the cytoplasm and nucleus, was isolated from soybean [Glycine max (L.)]. GmSK1 was constitutively expressed in all the tested tissues, especially in the roots...
March 7, 2018: Plant Physiology and Biochemistry: PPB
Dengwei Jue, Xuelian Sang, Liqin Liu, Bo Shu, Yicheng Wang, Jianghui Xie, Chengming Liu, Shengyou Shi
Ubiquitin-conjugating enzymes (E2s or UBC enzymes) play vital roles in plant development and combat various biotic and abiotic stresses. Longan ( Dimocarpus longan Lour.) is an important fruit tree in the subtropical region of Southeast Asia and Australia; however the characteristics of the UBC gene family in longan remain unknown. In this study, 40 D. longan UBC genes ( DlUBCs ), which were classified into 15 groups, were identified in the longan genome. An RNA-seq based analysis showed that DlUBCs showed distinct expression in nine longan tissues...
March 15, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Francisco Lopez-Tapia, Christine Brotherton-Pleiss, Peibin Yue, Heide Murakami, Ana Carolina Costa Araujo, Bruna Reis Dos Santos, Erin Ichinotsubo, Anna Rabkin, Raj Shah, Megan Lantz, Suzie Chen, Marcus A Tius, James Turkson
The molecular determinants for the activities of the reported benzoic acid (SH4-54), salicylic acid (BP-1-102), and benzohydroxamic acid (SH5-07)-based STAT3 inhibitors were investigated to design optimized analogues. All three leads are based on an N -methylglycinamide scaffold, with its two amine groups condensed with three different functionalities. The three functionalities and the CH2 group of the glycinamide scaffold were separately modified. The replacement of the pentafluorobenzene or cyclohexylbenzene, or replacing the benzene ring of the aromatic carboxylic or hydroxamic acid motif with heterocyclic components (containing nitrogen and oxygen elements) all decreased potency...
March 8, 2018: ACS Medicinal Chemistry Letters
Xin Li, Shengfu Zhong, Wanquan Chen, Syeda Akash Fatima, Qianglan Huang, Qing Li, Feiquan Tan, Peigao Luo
Fusarium head blight (FHB), mainly caused by Fusarium graminearum , is one of the most destructive fungal diseases of wheat ( Triticum aestivum L.). Because of the quantitative nature of FHB resistance, its mechanism is poorly understood. We conducted a comparative transcriptome analysis to identify genes that are differentially expressed in FHB-resistant and FHB-susceptible wheat lines grown under field conditions for various periods after F. graminearum infection and determined the chromosomal distribution of the differentially expressed genes (DEGs)...
March 14, 2018: International Journal of Molecular Sciences
M N Danilova, A A Andreeva, A S Doroshenko, N V Kudryakova, Vl V Kuznetsov, V V Kusnetsov
As multifunctional regulators of physiological processes, phytohormones play an important role in the regulation of expression of the plastid genome and chloroplast biogenesis. Hormones can directly regulate the expression of genes localized in the chloroplast genome. However, many components of the plastid transcription apparatus are encoded by nuclear rather than plastid genes. It remains obscure whether these nuclear genes are subject to hormonal regulation. This is the first study to show that phytohormones exert differential effects on the expression of nuclear genes of the transcription machinery of the Arabidopsis thaliana plastome...
January 2018: Doklady. Biochemistry and Biophysics
P K Christova, N K Christov, P V Mladenov, R Imai
Expression of the TaMDC1 in transgenic tomato plants confer resistance to bacterial and fungal pathogens, as well as an insect pest and thus prove in planta function of the wheat cystatin. Cystatins are the polypeptides with cysteine proteinase inhibitory activities. Plant cystatins or phytocystatins are known to contribute to plant resistance against insect pests. Recently, increasing data proved that some of the phytocystatins also have antifungal activities in vitro. Here, we functionally characterized a wheat multidomain cystatin, TaMDC1, using in planta assays...
March 12, 2018: Plant Cell Reports
Veronica Preite, Carla Oplaat, Arjen Biere, Jan Kirschner, Wim H van der Putten, Koen J F Verhoeven
DNA methylation is one of the mechanisms underlying epigenetic modifications. DNA methylations can be environmentally induced and such induced modifications can at times be transmitted to successive generations. However, it remains speculative how common such environmentally induced transgenerational DNA methylation changes are and if they persist for more than one offspring generation. We exposed multiple accessions of two different apomictic dandelion lineages of the Taraxacum officinale group ( Taraxacum alatum and T...
March 2018: Ecology and Evolution
Yuejin Li, Xili Shang, Changhai Li, Xiaoming Huang, Jingjing Zheng
Novel visible-light-induced UiO-66/BiOI photocatalysts with a p-n junction structure have been prepared for the first time through a facile hydrothermal method. The prepared photocatalysts were characterized using the powder X-ray diffraction, high resolution transmission electron microscopy, scanning electron microscopy, UV-visible diffuse reflectance spectra, and N2 adsorption-desorption (Brunauer-Emmett-Teller) techniques respectively. The photodegradation performances of UiO-66/BiOI photocatalysts were evaluated by photodegrading salicylic acid under visible-light irradiation...
March 2018: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Jiang Li, Caili Li, Shanfa Lu
Cytosine DNA methylation is highly conserved epigenetic modification involved in a wide range of biological processes in eukaryotes. It was established and maintained by cytosine-5 DNA methyltransferases (C5-MTases) in plants. Through genome-wide identification, eight putative SmC5-MTase genes were identified from the genome of Salvia miltiorrhiza , a well-known traditional Chinese medicine material and an emerging model medicinal plant. Based on conserved domains and phylogenetic analysis, eight SmC5-MTase genes were divided into four subfamilies, including MET , CMT , DRM and DNMT2 ...
2018: PeerJ
Bing Wang, Na Song, Qiong Zhang, Ning Wang, Zhensheng Kang
Highly conserved mitogen-activated protein kinase (MAPK) cascades regulate numerous plant processes, including hormonal responses, stress, and innate immunity. In this research, TaMAPK4 was predicted to be a target of tae-miR164. We verified the binding and suppression of TaMAPK4 by co-expression in Nicotiana benthamiana . Moreover, we found TaMAPK4 was localized in the cytoplasm and nucleus using transient expression analyses. TaMAPK4 transcripts increased following salicylic acid (SA) treatment and when host plants were infected with an avirulent race of the stripe-rust pathogen...
2018: Frontiers in Plant Science
Hyun G Kong, Teak S Shin, Tae H Kim, Choong-Min Ryu
The volatile compound 2,3-butanediol, which is produced by certain strains of root-associated bacteria, consists of three stereoisomers, namely, two enantiomers (2R,3R- and 2S,3S-butanediol) and one meso compound (2R,3S-butanediol). The ability of 2,3-butanediol to induce plant resistance against pathogenic fungi and bacteria has been investigated; however, little is known about its effects on induced resistance against viruses in plants. To investigate the effects of 2,3-butanediol on plant systemic defense against viruses, we evaluated the disease control capacity of each of its three stereoisomers in pepper...
2018: Frontiers in Plant Science
Ting Wei, Xin Lv, HongLei Jia, Li Hua, HuiHui Xu, Ran Zhou, Jin Zhao, XinHao Ren, JunKang Guo
In this study, we investigated the ameliorative effects of salicylic acid (SA), metal ion (Fe(II)), and plant growth-promoting bacteria Burkholderia sp. D54 (B) on two tomato genotypes with different Cd tolerances under Cd stress, viz. Liger (Cd tolerant) and Tabd (Cd sensitive). The plant biomass, Cd accumulation, antioxidative response, pigment content and photosynthetic performance were determined. According to the results, exogenous application of SA, Fe(II) and Burkholderia sp. D54 or their complex effectively reduced Cd accumulation and increased biomass of root, stem and leaves in both Cd sensitive and Cd tolerant genotypes...
March 8, 2018: Journal of Environmental Management
R Brindha, P Muthuselvam, S Senthilkumar, P Rajaguru
Inspired by the efficiency of the photo-Fenton process on oxidation of organic pollutants, we herein present the feasibility of visible light driven photo-Fenton process as a post treatment of biological method for the effective degradation and detoxification of monoazo dye Mordant Yellow 10 (MY10). Anaerobic degradation of MY10 by Pseudomonas aeroginosa formed aromatic amines which were further degraded in the subsequent Fe catalyzed photo-Fenton process carried out at pH 3.0, with iron shavings and H2 O2 under blue LED light illumination...
February 26, 2018: Chemosphere
Qunqun Hao, Wenqiang Wang, Xiuli Han, Jingzheng Wu, Bo Lyu, Fengjuan Chen, Allan Caplan, Caixia Li, Jiajie Wu, Wei Wang, Qian Xu, Daolin Fu
Salicylic acid (SA) plays an important role in signal transduction and disease resistance. In Arabidopsis, SA can be made by either of two biosynthetic branches, one involving isochorismate synthase (ICS) and the other involving phenylalanine ammonia lyase (PAL). However, the biosynthetic pathway and the importance of SA remains largely unknown in Triticeae. Here, we cloned one ICS and seven PAL genes from barley, and studied their functions by overexpressing and suppressing them in that plant. Suppression of the ICS gene significantly delayed plant growth, while PAL genes, both overexpressed and suppressed, had no significant effect on plant growth...
March 8, 2018: Molecular Plant Pathology
Jinhong Kan, Lin An, Yao Wu, Jia Long, Liyang Song, Rongxiang Fang, Yantao Jia
During plant-pathogen interactions, pathogenic bacteria have evolved multiple strategies to cope with the sophisticated defense systems of host plants. Proline iminopeptidase (PIP) is essential to Xanthomonas campestris pv. campestris (Xcc) virulence, and conserved in many plant-associated bacteria, but its pathogenic mechanism remains unclear. In this study, we found that disrupting pip in Xcc enhanced its flagella-mediated bacterial motility by decreasing intracellular c-di-GMP levels, and overexpression of pip restricted bacterial motility by elevating c-di-GMP levels...
March 8, 2018: Molecular Plant Pathology
Jian Zheng, Xiaohua Ma, Xule Zhang, Qingdi Hu, Renjuan Qian
Salt stress is a critical factor that affects the growth and development of plants. Salicylic acid (SA) is an important signal molecule that mitigates the negative effects of salt stress on plants. To elucidate salt tolerance in large pink Dianthus superbus L. (Caryophyllaceae) and the regulatory mechanism of exogenous SA on D. superbus under different salt stresses, we conducted a pot experiment to evaluate leaf biomass, leaf anatomy, soluble protein and sugar content, and the relative expression of salt-induced genes in D...
March 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
Mohd Nauman, R K Kale, Rana P Singh
BACKGROUND: Salix aegyptiaca is known for its medicinal properties mainly due to the presence of salicylate compounds. However, it also contains other beneficial phytochemicals such as gallic acid, quercetin, rutin and vanillin. The aim of the study was to examine the redox potential, antioxidant and anti-inflammatory activity of these phytochemicals along with acetylsalicylic acid. METHODS: The redox potential and antioxidant activity of gallic acid, quercetin, rutin, vanillin and acetylsalicylic acid were determined by oxidation-reduction potential electrode method and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay, respectively...
March 7, 2018: BMC Complementary and Alternative Medicine
Przemyslaw Kosinski, Urszula Sarzynska-Nowacka, Magdalena Fiolna, Miroslaw Wielgos
It is now well established that acetylsalicylic acid - one of the most widely prescribed drugs today - has brought a new era in maternal-fetal medicine. The History of medicine mentions several antecedents. Extracts made from willow contained in clay tablets are reported in both ancient Sumer and Egypt. In 400 BC, Hippocrates referred to the use of salicylic tea to reduce fevers. In the 1950s, acetylsalicylic acid entered the Guinness Book of Records as the highest selling painkiller. There is little doubt that acetylsalicylic acid - one of the first drugs to enter common usage - remains one of the most researched drugs in the world...
2018: Ginekologia Polska
Bo Min Kim, H C Therese Lotter-Stark, Edward P Rybicki, Rachel K Chikwamba, Kenneth E Palmer
Griffithsin (GRFT) is an antiviral lectin, originally derived from a red alga, which is currently being investigated as a topical microbicide to prevent transmission of human immunodeficiency virus (HIV). Targeting GRFT to the apoplast for production in Nicotiana benthamiana resulted in necrotic symptoms associated with a hypersensitive response (HR)-like cell death, accompanied by H2 O2 generation and increased PR1 expression. Mannose-binding lectins Surfactant protein D (SP-D), cyanovirin-N (CV-N) and human mannose-binding lectin (hMBL) also induce salicylic acid (SA) dependent HR-like cell death in N...
March 6, 2018: Plant Biotechnology Journal
Sangeeta Ray Banerjee, Xiaolei Song, Xing Yang, Il Minn, Ala Lisok, Yanrong Chen, Martin G Pomper, Peter C M van Zijl, Michael McMahon, Jian Chen
Chemical exchange saturation transfer (CEST) magnetic resonance imaging (MRI) is an innovative molecular imaging technique in which contrast agents are labeled by saturating their exchangeable protons spins by radio frequency irradiation. Salicylic acid and its analogues are a promising class of highly sensitive, diamagnetic CEST agents. We synthesized polymeric agents grafted with salicylic acid moieties and a known high-affinity ligand targeting prostate-specific membrane antigen (PSMA) in a ~10:1 molar ratio to provide sufficient MRI sensitivity and receptor specificity...
March 5, 2018: Chemistry: a European Journal
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