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https://www.readbyqxmd.com/read/29779109/the-gene-encoding-the-universal-stress-protein-atusp-is-regulated-by-phytohormones-and-involved-in-seed-germination-of-arabidopsis-thaliana
#1
D S Gorshkova, I A Getman, A S Voronkov, S I Chizhova, Vl V Kuznetsov, E S Pojidaeva
For the first time, the organ-specific expression pattern of the AtUSP (At3g58450) gene, which also undergoes hormonal regulation, was shown. The USP protein encoded by this gene is involved in seed germination of Arabidopsis thaliana and, unlike abscisic acid, stimulates this process.
March 2018: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29778815/photodegradation-of-atrazine-in-the-presence-of-indole-3-acetic-acid-and-natural-montmorillonite-clay-minerals
#2
Lin Zhang, Haoting Tian, Ran Hong, Chao Wang, Yi Wang, Anping Peng, Cheng Gu
Atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) is a commonly used agricultural herbicide that, as a result, is frequently detected in surface and ground water. In this study, we provide evidence of the photo-oxidation of atrazine under environmentally relevant conditions, specifically, in the presence of natural montmorillonite clay and the ubiquitous phytohormone indole-3-acetic acid (IAA). The reaction is initiated by the generation of hydrated electrons from the photo-ionization of IAA. These electrons react with protons and dissolved oxygen to form hydroxyl radicals, which promote the further degradation of atrazine...
May 17, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29778745/phytohormone-abscisic-acid-elicits-antinociceptive-effects-in-rats-through-the-activation-of-opioid-and-peroxisome-proliferator-activated-receptors-%C3%AE-%C3%AE
#3
Mahtab Mollashahi, Mehdi Abbasnejad, Saeed Esmaeili-Mahani
The phytohormone abscisic acid exists in animal tissues particularly in the brain. However, its neurophysiological effects have not yet been fully clarified. This study was designed to evaluate the possible antinociceptive effects of abscisic acid on animal models of pain and determine its possible signaling mechanism. Tail-flick, hot-plate and formalin tests were used to assess the nociceptive threshold. All experiments were carried out on male Wistar rats. To determine the role of Peroxisome proliferator-activated receptor β/δ (PPARβ/δ) and opioid receptors on the induction of abscisic acid antinociception, specific antagonists were injected 15min before abscisic acid...
May 17, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29773623/draft-genome-sequences-of-azospirillum-brasilense-strains-ab-v5-and-ab-v6-commercially-used-in-inoculants-for-grasses-and-legumes-in-brazil
#4
Mariangela Hungria, Renan Augusto Ribeiro, Marco Antonio Nogueira
Azospirillum brasilense strains Ab-V5 and Ab-V6 are largely used in commercial inoculants for grasses and legumes in Brazil. Their genomes were estimated at 6,934,595 and 7,197,196 bp, respectively, and encompass genes related to nitrogen fixation, synthesis of phytohormones, and environmental adaptation. Although the strains differ in phenotypic properties, their genomes are highly similar.
May 17, 2018: Genome Announcements
https://www.readbyqxmd.com/read/29771289/performance-of-plasma-trigonelline-as-a-marker-of-coffee-consumption-in-an-epidemiologic-setting
#5
Øivind Midttun, Arve Ulvik, Ottar Nygård, Per M Ueland
Background: Coffee is a widely consumed beverage, and studies suggest that drinking coffee has beneficial health effects. The phytohormone trigonelline is present in large amounts in coffee beans, and circulating concentrations of trigonelline have been shown to be positively related to dietary intake of coffee and to increase significantly after the consumption of a bolus dose of coffee. Objective: We cross-sectionally investigated the utility of plasma trigonelline as a marker of coffee consumption in an epidemiologic setting...
May 15, 2018: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29770376/field-studies-reveal-functions-of-chemical-mediators-in-plant-interactions
#6
REVIEW
Meredith C Schuman, Ian T Baldwin
Plants are at the trophic base of most ecosystems, embedded in a rich network of ecological interactions in which they evolved. While their limited range and speed of motion precludes animal-typical behavior, plants are accomplished chemists, producing thousands of specialized metabolites which may function to convey information, or even to manipulate the physiology of other organisms. Plants' complex interactions and their underlying mechanisms are typically dissected within the controlled environments of growth chambers and glasshouses, but doing so introduces conditions alien to plants evolved in natural environments, such as being pot-bound, and receiving artificial light with a spectrum very different from sunlight...
May 17, 2018: Chemical Society Reviews
https://www.readbyqxmd.com/read/29768484/herbivory-responsive-calmodulin-like-protein-cml9-does-not-guide-jasmonate-mediated-defenses-in-arabidopsis-thaliana
#7
Monika Heyer, Sandra S Scholz, Dagmar Voigt, Michael Reichelt, Didier Aldon, Ralf Oelmüller, Wilhelm Boland, Axel Mithöfer
Calcium is an important second messenger in plants that is released into the cytosol early after recognition of various environmental stimuli. Decoding of such calcium signals by calcium sensors is the key for the plant to react appropriately to each stimulus. Several members of Calmodulin-like proteins (CMLs) act as calcium sensors and some are known to mediate both abiotic and biotic stress responses. Here, we study the role of the Arabidopsis thaliana CML9 in different stress responses. CML9 was reported earlier as defense regulator against Pseudomonas syringae...
2018: PloS One
https://www.readbyqxmd.com/read/29764982/superman-regulates-floral-whorl-boundaries-through-control-of-auxin-biosynthesis
#8
Yifeng Xu, Nathanaël Prunet, Eng-Seng Gan, Yanbin Wang, Darragh Stewart, Frank Wellmer, Jiangbo Huang, Nobutoshi Yamaguchi, Yoshitaka Tatsumi, Mikiko Kojima, Takatoshi Kiba, Hitoshi Sakakibara, Thomas P Jack, Elliot M Meyerowitz, Toshiro Ito
Proper floral patterning, including the number and position of floral organs in most plant species, is tightly controlled by the precise regulation of the persistence and size of floral meristems (FMs). In Arabidopsis , two known feedback pathways, one composed of WUSCHEL (WUS) and CLAVATA3 (CLV3) and the other composed of AGAMOUS (AG) and WUS, spatially and temporally control floral stem cells, respectively. However, mounting evidence suggests that other factors, including phytohormones, are also involved in floral meristem regulation...
May 15, 2018: EMBO Journal
https://www.readbyqxmd.com/read/29762698/the-role-of-plant-abiotic-factors-on-the-interactions-between-cnaphalocrocis-medinalis-lepidoptera-crambidae-and-its-host-plant
#9
Kun-Yu Tu, Shin-Fu Tsai, Tzu-Wei Guo, Hou-Ho Lin, Zhi-Wei Yang, Chung-Ta Liao, Wen-Po Chuang
Atmospheric temperature increases along with increasing atmospheric CO2 concentration. This is a major concern for agroecosystems. Although the impact of an elevated temperature or increased CO2 has been widely reported, there are few studies investigating the combined effect of these two environmental factors on plant-insect interactions. In this study, plant responses (phenological traits, defensive enzyme activity, secondary compounds, defense-related gene expression and phytohormone) of Cnaphalocrocis medinalis (Guenée) (Lepidoptera: Pyralidae) -susceptible and resistant rice under various conditions (environment, soil type, variety, C...
May 12, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29761439/an-uhplc-ms-ms-method-for-target-profiling-of-stress-related-phytohormones
#10
Ondřej Novák, Kristýna Floková
The methodology described here represents an improved strategy for analysis of a broad range of stress-related plant hormones including jasmonates, salicylic acid, abscisic acid, and auxin metabolites. The method conditions are optimized in order to reduce the background effect of complicated plant matrix, allow effective preconcentration and thus perform highly sensitive profiling of multiple plant hormones by ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS).
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29760074/atpep3-is-a-hormone-like-peptide-that-plays-a-role-in-the-salinity-stress-tolerance-of-plants
#11
Kentaro Nakaminami, Masanori Okamoto, Mieko Higuchi-Takeuchi, Takeshi Yoshizumi, Yube Yamaguchi, Yoichiro Fukao, Minami Shimizu, Chihiro Ohashi, Maho Tanaka, Minami Matsui, Kazuo Shinozaki, Motoaki Seki, Kousuke Hanada
Peptides encoded by small coding genes play an important role in plant development, acting in a similar manner as phytohormones. Few hormone-like peptides, however, have been shown to play a role in abiotic stress tolerance. In the current study, 17 Arabidopsis genes coding for small peptides were found to be up-regulated in response to salinity stress. To identify peptides leading salinity stress tolerance, we generated transgenic Arabidopsis plants overexpressing these small coding genes and assessed survivability and root growth under salinity stress conditions...
May 14, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29759179/n-doped-carbon-nanotubes-reinforced-hollow-fiber-solid-phase-microextraction-coupled-with-high-performance-liquid-chromatography-for-the-determination-of-phytohormones-in-tomatoes
#12
Xiao-Fei Han, Juan Chen, Yan-Ping Shi
A N-doped carbon nanotubes-reinforced hollow fiber solid-phase microextraction (N-doped CNTs-HF-SPME) method was developed for determination of two naphthalene-derived phytohormones, 1-naphthalene acetic acid (NAA) and 2-naphthoxyacetic acid (2-NOA), at trace levels in tomatoes. N-doped CNTs were dispersed in ultrapure water with the assistance of surfactant, and then immobilized into the pores of hollow fiber by capillary forces and sonification. The resultant N-doped CNTs-HF was wetted with 1-octanol, subsequently immersed into the tomato samples to extract the target analytes under a magnetic stirring, and then desorbed with methanol by sonication prior to chromatographic analysis...
August 1, 2018: Talanta
https://www.readbyqxmd.com/read/29758376/ethylene-signaling-cross-talk-with-other-hormones-in-arabidopsis-thaliana-exposed-to-contrasting-phosphate-availability-differential-effects-in-roots-leaves-and-fruits
#13
Sergi Munné-Bosch, Bárbara Simancas, Maren Müller
Ethylene signaling plays a major role in the regulation of plant growth, but its cross-talk with other phytohormones is still poorly understood. Here, we investigated whether or not a defect in ethylene signaling, particularly in the ETHYLENE INSENSITIVE3 (EIN3) transcription factor, alters plant growth and influences the contents of other phytohormones. With this aim, a hormonal profiling approach using ultrahigh performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS) was used to unravel organ-specific responses (in roots, leaves and fruits) in the ein3-1 mutant and wild-type A...
May 4, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29757203/comparative-in-silico-analysis-of-ferric-reduction-oxidase-fro-genes-expression-patterns-in-response-to-abiotic-stresses-metal-and-hormone-applications
#14
Izhar Muhammad, Xiu-Qing Jing, Abdullah Shalmani, Muhammad Ali, Shi Yi, Peng-Fei Gan, Wen-Qiang Li, Wen-Ting Liu, Kun-Ming Chen
The ferric reduction oxidase (FRO) gene family is involved in various biological processes widely found in plants and may play an essential role in metal homeostasis, tolerance and intricate signaling networks in response to a number of abiotic stresses. Our study describes the identification, characterization and evolutionary relationships of FRO genes families. Here, total 50 FRO genes in Plantae and 15 ‘FRO like’ genes in non-Plantae were retrieved from 16 different species. The entire FRO genes have been divided into seven clades according to close similarity in biological and functional behavior...
May 12, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29756135/microbial-small-molecules-weapons-of-plant-subversion
#15
REVIEW
Ioannis A Stringlis, Hao Zhang, Corné M J Pieterse, Melvin D Bolton, Ronnie de Jonge
Covering: up to 2018Plants live in close association with a myriad of microbes that are generally harmless. However, the minority of microbes that are pathogens can severely impact crop quality and yield, thereby endangering food security. By contrast, beneficial microbes provide plants with important services, such as enhanced nutrient uptake and protection against pests and diseases. Like pathogens, beneficial microbes can modulate host immunity to efficiently colonize the nutrient-rich niches within and around the roots and aerial tissues of a plant, a phenomenon mirroring the establishment of commensal microbes in the human gut...
May 14, 2018: Natural Product Reports
https://www.readbyqxmd.com/read/29755490/quantitative-tandem-affinity-purification-an-effective-tool-to-investigate-protein-complex-composition-in-plant-hormone-signaling-strigolactones-in-the-spotlight
#16
Sylwia Struk, Lukas Braem, Alan Walton, Annick De Keyser, François-Didier Boyer, Geert Persiau, Geert De Jaeger, Kris Gevaert, Sofie Goormachtig
Phytohormones tightly regulate plant growth by integrating changing environmental and developmental cues. Although the key players have been identified in many plant hormonal pathways, the molecular mechanisms and mode of action of perception and signaling remain incompletely resolved. Characterization of protein partners of known signaling components provides insight into the formed protein complexes, but, unless quantification is involved, does not deliver much, if any, information about the dynamics of the induced or disrupted protein complexes...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29754404/the-asian-corn-borer-ostrinia-furnacalis-feeding-increases-the-direct-and-indirect-defense-of-mid-whorl-stage-commercial-maize-in-the-field
#17
Jingfei Guo, Jinfeng Qi, Kanglai He, Jianqiang Wu, Shuxiong Bai, Tiantao Zhang, Jiuran Zhao, Zhenying Wang
The Asian corn borer (Ostrinia furnacalis Guenée) is a destructive pest of maize (Zea mays L.). Despite large-scale commercial maize production, little is known about the defensive responses of field-grown commercial maize to O. furnacalis herbivory, and how these responses result in direct and indirect defense against this pest. To elucidate the maize transcriptome response to O. furnacalis feeding, leaves of maize hybrid Jingke968 were infested with O. furnacalis for 0, 2, 4, 12 and 24 h. O. furnacalis feeding elicited stronger and more rapid changes in the defense-related gene expression (i...
May 13, 2018: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29751564/phytohormone-signaling-of-the-resistance-to-plum-pox-virus-ppv-sharka-disease-induced-by-almond-prunus-dulcis-miller-webb-grafting-to-peach-p-persica-l-batsch
#18
Azam Nikbakht Dehkordi, Manuel Rubio, Nadali Babaeian, Alfonso Albacete, Pedro Martínez-Gómez
Plum pox virus (PPV, sharka) is a limiting factor for peach production, and no natural sources of resistance have been described. Recent studies, however, have demonstrated that grafting the almond cultivar "Garrigues" onto the "GF305" peach infected with Dideron-type (PPV-D) isolates progressively reduces disease symptoms and virus accumulation. Furthermore, grafting "Garrigues" onto "GF305" prior to PPV-D inoculation has been found to completely prevent virus infection, showing that resistance is constitutive and not induced by the virus...
May 3, 2018: Viruses
https://www.readbyqxmd.com/read/29751062/new-insights-into-auxin-metabolism-in-bradyrhizobium-japonicum
#19
Daniela Torres, Iliana Benavidez, Florencia Donadio, Elias Mongiardini, Susana Rosas, Stijn Spaepen, Jozef Vanderleyden, Aleš Pěnčík, Ondřej Novák, Miroslav Strnad, Jitka Frébortová, Fabricio Cassán
Bacterial metabolism of phytohormones includes several processes such as biosynthesis, catabolism, conjugation, hydrolysis and homeostatic regulation. However, only biosynthesis and occasionally catabolism are studied in depth in microorganisms. In this work, we evaluated and reconsidered IAA metabolism in B. japonicum E109, one of the most widely used strains for soybean inoculation around the world. The genomic analysis of the strain showed the presence of several genes responsible for IAA biosynthesis, mainly via indole-3-acetonitrile (IAN), indole-3-acetamide (IAM) and tryptamine (TAM) pathways...
May 8, 2018: Research in Microbiology
https://www.readbyqxmd.com/read/29747107/glutaredoxin-grxs16-mediates-brassinosteroid-induced-apoplastic-h-2-o-2-production-to-promote-pesticide-metabolism-in-tomato
#20
Jiayin Hou, Qihao Zhang, Yue Zhou, Golam Jalal Ahammed, Yanhong Zhou, Jingquan Yu, Hua Fang, Xiaojian Xia
Brassinosteroids (BRs), a group of steroid phytohormones, are involved in multiple aspects of plant growth, development and stress responses. Despite recent studies on BRs-promoted pesticide metabolism in plants, the underlying mechanisms remain poorly understood. Here, we showed that 24-epibrassinolide (EBR) significantly enhanced the expression of RESPIRATORY BURST OXIDASE HOMOLOG1 (RBOH1) and H2 O2 accumulation in the apoplast of chlorothalonil (CHT, a broad spectrum nonsystemic fungicide)-treated tomato plants...
May 7, 2018: Environmental Pollution
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