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https://www.readbyqxmd.com/read/28724956/mapping-resistance-responses-to-sclerotinia-infestation-in-introgression-lines-of-brassica-juncea-carrying-genomic-segments-from-wild-brassicaceae-b-fruticulosa
#1
Kusum Rana, Chhaya Atri, Mehak Gupta, Javed Akhatar, Prabhjodh S Sandhu, Nitin Kumar, Ravinder Jaswal, Martin J Barbetti, Surinder S Banga
Sclerotinia stem rot (Sclerotinia sclerotiorum) is a major disease of Brassica oilseeds. As suitable donors to develop resistant cultivars are not available in crop Brassicas, we introgressed resistance from a wild Brassicaceae species, B. fruticulosa. We produced 206 B. juncea-B. fruticulosa introgression lines (ILs). These were assessed for pollen grain fertility, genome size variations and resistance responses to Sclerotinia following stem inoculations under disease-conducive conditions. Of these, 115 ILs showing normal fertility and genome size were selected for cytogenetic characterization using florescent genomic in situ hybridization (Fl-GISH)...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716006/ethylene-induces-combinatorial-effects-of-histone-h3-acetylation-in-gene-expression-in-arabidopsis
#2
Likai Wang, Fan Zhang, Siddharth Rode, Kevin K Chin, Eun Esther Ko, Jonghwan Kim, Vishwanath R Iyer, Hong Qiao
BACKGROUND: Histone acetylation and deacetylation are essential for gene regulation and have been implicated in the regulation of plant hormone responses. Many studies have indicated the role of histone acetylation in ethylene signaling; however, few studies have investigated how ethylene signaling regulates the genomic landscape of chromatin states. Recently, we found that ethylene can specifically elevate histone H3K14 acetylation and the non-canonical histone H3K23 acetylation in etiolated seedlings and the gene activation is positively associated with the elevation of H3K14Ac and H3K23Ac in response to ethylene...
July 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28601518/biochemical-responses-and-ultrastructural-changes-in-ethylene-insensitive-mutants-of-arabidopsis-thialiana-subjected-to-bisphenol-a-exposure
#3
Imran Ali, Mehmood Jan, Abdul Wakeel, Azizullah Azizullah, Bohan Liu, Faisal Islam, Abid Ali, M K Daud, Yihua Liu, Yinbo Gan
Bisphenol A (BPA), an important raw material in plastic industry, has become a serious environmental contaminant due to its wide spread use in different products and increasing release into the environment. BPA is known to cause adverse effects in living organisms including plants. Several studies reported that BPA affects growth and development in plants, mainly through oxidative stress. Plants are known to generally cope with stress mainly through hormonal regulation and adaptation, but little is known about the role of plant hormones in plants under BPA stress...
June 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28402161/ein2-mediated-signaling-is-involved-in-pre-invasion-defense-in-nicotiana-benthamiana-against-potato-late-blight-pathogen-phytophthora-infestans
#4
Soriya Rin, Yuri Mizuno, Yusuke Shibata, Mayuka Fushimi, Shinpei Katou, Ikuo Sato, Sotaro Chiba, Kazuhito Kawakita, Daigo Takemoto
Nicotiana benthamiana ABCG1 and ABCG2 are ABC transporters which are probably involved in the export of capsidiol, the major phytoalexin of Nicotiana species. While capsidiol export by these transporters plays an essential role in post-invasion defense against Phytophthora infestans, they also export unidentified antimicrobial compound(s) involved in pre-invasion defense. In this study, promoter activity of NbABCG2 (Pabcg2a) was analyzed using a GFP marker. Expression of GFP under the control of Pabcg2a was significantly increased by co-expression with the INF1 elicitor from P...
April 3, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28400495/constitutively-active-arabidopsis-map-kinase-3-triggers-defense-responses-involving-salicylic-acid-and-summ2-resistance-protein
#5
Baptiste Genot, Julien Lang, Souha Berriri, Marie Garmier, Françoise Gilard, Stéphanie Pateyron, Katrien Haustraete, Dominique Van Der Streaten, Heribert Hirt, Jean Colcombet
Mitogen-activated protein kinases (MAPKs) are important regulators of plant immunity. Most of the knowledge about the function of these pathways is derived from loss-of-function approaches. Using a gain-of-function approach, we investigated the responses controlled by a constitutively active (CA) MPK3 in Arabidopsis thalianaCA-MPK3 plants are dwarfed and display a massive derepression of defense genes associated with spontaneous cell death as well as the accumulation of reactive oxygen species, phytoalexins, and the stress-related hormones ethylene and salicylic acid (SA)...
June 2017: Plant Physiology
https://www.readbyqxmd.com/read/28344560/nitric-oxide-has-a-concentration-dependent-effect-on-the-cell-cycle-acting-via-ein2-in-arabidopsis-thaliana-cultured-cells
#6
Galina V Novikova, Luis A J Mur, Alexander V Nosov, Artem A Fomenkov, Kirill S Mironov, Anna S Mamaeva, Evgeny S Shilov, Victor Y Rakitin, Michael A Hall
Ethylene is known to influence the cell cycle (CC) via poorly characterized roles whilst nitric oxide (NO) has well-established roles in the animal CC but analogous role(s) have not been reported for plants. As NO and ethylene signaling events often interact we examined their role in CC in cultured cells derived from Arabidopsis thaliana wild-type (Col-0) plants and from ethylene-insensitive mutant ein2-1 plants. Both NO and ethylene were produced mainly during the first 5 days of the sub-cultivation period corresponding to the period of active cell division...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28300216/ein3-and-sos2-synergistically-modulate-plant-salt-tolerance
#7
Ruidang Quan, Juan Wang, Dexin Yang, Haiwen Zhang, Zhijin Zhang, Rongfeng Huang
Ethylene biosynthesis and the ethylene signaling pathway regulate plant salt tolerance by activating the expression of downstream target genes such as those related to ROS and Na(+)/K(+) homeostasis. The Salt Overly Sensitive (SOS) pathway regulates Na(+)/K(+) homeostasis in Arabidopsis under salt stress. However, the connection between these two pathways is unclear. Through genetic screening, we identified two sos2 alleles as salt sensitive mutants in the ein3-1 background. Neither Ethylene-Insensitive 2 (EIN2) nor EIN3 changed the expression patterns of SOS genes including SOS1, SOS2, SOS3 and SOS3-like Calcium Binding Protein 8 (SCaBP8), but SOS2 activated the expression of one target gene of EIN3, Ethylene and Salt-inducible ERF 1 (ESE1)...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28293845/kinase-assay-for-constitutive-triple-response-1-ctr1-in-arabidopsis-thaliana
#8
Han Yong Lee, Gyeong Mee Yoon
Protein kinases are central components of signal transduction pathways in the cell. They catalyze the phosphorylation of substrate proteins, resulting in changes of the activity, localization, stability, and protein interactions of the substrates, ultimately coordinating the activity of important cellular processes. CONSTITUTIVE TRIPLE RESPONSE 1 (CTR1) is a Raf-like protein kinase that functions as a negative regulator in the phytohormone ethylene signaling pathway. CTR1 physically interacts with ethylene receptors via its N-terminal domain at the endoplasmic reticulum, and is involved in suppressing ethylene signaling in the absence of ethylene...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28293243/induced-systemic-resistance-against-botrytis-cinerea-by-bacillus-cereus-ar156-through-a-ja-et-and-npr1-dependent-signaling-pathway-and-activates-pamp-triggered-immunity-in-arabidopsis
#9
Pingping Nie, Xia Li, Shune Wang, Jianhua Guo, Hongwei Zhao, Dongdong Niu
Induced resistance response is a potent and cost effective plant defense against pathogen attack. The effectiveness and underlying mechanisms of the suppressive ability by Bacillus cereus AR156 to Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) in Arabidopsis has been investigated previously; however, the strength of induced systemic resistance (ISR) activity against Botrytis cinerea remains unknown. Here, we show that root-drench application of AR156 significantly reduces disease incidence through activation of ISR...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28286514/ethylene-improves-root-system-development-under-cadmium-stress-by-modulating-superoxide-anion-concentration-in-arabidopsis-thaliana
#10
Ann Abozeid, Zuojia Ying, Yingchao Lin, Jia Liu, Zhonghua Zhang, Zhonghua Tang
This work aims at identifying the effects of ethylene on the response of Arabidopsis thaliana root system to cadmium chloride (CdCl2) stress. Two ethylene-insensitive mutants, ein2-5 and ein3-1eil1-1, were subjected to (25, 50, 75, and 100 μM) CdCl2 concentrations, from which 75 μM concentration decreased root growth by 40% compared with wild type Col-0 as a control. Ethylene biosynthesis increased in response to CdCl2 treatment. The length of primary root and root tip in ein2-5 and ein3-1eil1-1 decreased compared with wild type after CdCl2 treatment, suggesting that ethylene play a role in root system response to Cd stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28224919/characteristics-and-regulatory-pathway-of-the-prupesep1-sepallata-gene-during-ripening-and-softening-in-peach-fruits
#11
Jinjin Li, Fang Li, Ming Qian, Mingyu Han, Hangkong Liu, Dong Zhang, Juanjuan Ma, Caiping Zhao
SEPALLATA genes are members of a subfamily of MADS-box transcription factors, and have essential roles in floral organ development and fruit ripening. In this study, the PrupeSEP1 gene was cloned from peach flesh. Its deduced amino acid sequence was very similar to that of MdMADS8 and MdMADS9 in apple and MADS-RIN-like in strawberry. During storage of melting flesh (MF) peach, the pattern of SEP1 expression was similar to that of ethylene biosynthesis and ethylene signal transduction-related gene expression (EIN2 and ETR2)...
April 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28112257/ethylene-response-pathway-modulates-attractiveness-of-plant-roots-to-soybean-cyst-nematode-heterodera-glycines
#12
Yanfeng Hu, Jia You, Chunjie Li, Valerie M Williamson, Congli Wang
Plant parasitic nematodes respond to root exudates to locate their host roots. In our studies second stage juveniles of Heterodera glycines, the soybean cyst nematode (SCN), quickly migrated to soybean roots in Pluronic F-127 gel. Roots of soybean and non-host Arabidopsis treated with the ethylene (ET)-synthesis inhibitor aminoethoxyvinylglycine (AVG) were more attractive to SCN than untreated roots, and significantly more nematodes penetrated into roots. Moreover, Arabidopsis ET insensitive mutants (ein2, ein2-1, ein2-5, ein3-1, ein5-1, and ein6) were more attractive than wild-type plants...
January 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27973616/transcriptome-analysis-provides-a-preliminary-regulation-route-of-the-ethylene-signal-transduction-component-slein2-during-tomato-ripening
#13
Rui-Heng Wang, Xin-Yu Yuan, Lan-Huan Meng, Ben-Zhong Zhu, Hong-Liang Zhu, Yun-Bo Luo, Da-Qi Fu
Ethylene is crucial in climacteric fruit ripening. The ethylene signal pathway regulates several physiological alterations such as softening, carotenoid accumulation and sugar level reduction, and production of volatile compounds. All these physiological processes are controlled by numerous genes and their expression simultaneously changes at the onset of ripening. Ethylene insensitive 2 (EIN2) is a key component for ethylene signal transduction, and its mutation causes ethylene insensitivity. In tomato, silencing SlEIN2 resulted in a non-ripening phenotype and low ethylene production...
2016: PloS One
https://www.readbyqxmd.com/read/27933081/the-density-and-length-of-root-hairs-are-enhanced-in-response-to-cadmium-and-arsenic-by-modulating-gene-expressions-involved-in-fate-determination-and-morphogenesis-of-root-hairs-in-arabidopsis
#14
Ramin Bahmani, Dong G Kim, Jin A Kim, Seongbin Hwang
Root hairs are tubular outgrowths that originate from epidermal cells. Exposure of Arabidopsis to cadmium (Cd) and arsenic [arsenite, As(III)] increases root hair density and length. To examine the underlying mechanism, we measured the expression of genes involved in fate determination and morphogenesis of root hairs. Cd and As(III) downregulated TTG1 and GL2 (negative regulators of fate determination) and upregulated GEM (positive regulator), suggesting that root hair fate determination is stimulated by Cd and As(III)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27848154/jasmonic-acid-and-ethylene-signaling-pathways-regulate-glucosinolate-levels-in-plants-during-rhizobacteria-induced-systemic-resistance-against-a-leaf-chewing-herbivore
#15
Nurmi Pangesti, Michael Reichelt, Judith E van de Mortel, Eleni Kapsomenou, Jonathan Gershenzon, Joop J A van Loon, Marcel Dicke, Ana Pineda
Beneficial soil microbes can promote plant growth and induce systemic resistance (ISR) in aboveground tissues against pathogens and herbivorous insects. Despite the increasing interest in microbial-ISR against herbivores, the underlying molecular and chemical mechanisms of this phenomenon remain elusive. Using Arabidopsis thaliana and the rhizobacterium Pseudomonas simiae WCS417r (formerly known as P. fluorescens WCS417r), we here evaluate the role of the JA-regulated MYC2-branch and the JA/ET-regulated ORA59-branch in modulating rhizobacteria-ISR to Mamestra brassicae by combining gene transcriptional, phytochemical, and herbivore performance assays...
December 2016: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/27845361/transcriptome-analysis-of-arabidopsis-mutants-suggests-a-crosstalk-between-aba-ethylene-and-gsh-against-combined-cold-and-osmotic-stress
#16
Deepak Kumar, Saptarshi Hazra, Riddhi Datta, Sharmila Chattopadhyay
The involvement of ethylene and abscisic acid in providing stress tolerance and defence response to plants is widely recognized. However, little is known about the cross-talk between glutathione with ethylene and abscisic acid to combat stress in planta. Here, transcriptome analysis of combined cold and osmotic stress treated Arabidopsis mutants were carried out to elucidate the crosstalk between the abscisic acid, ethylene and glutathione. Microarray experiment revealed the differential regulation of about 2313 and 4131 transcripts in ein2 (ethylene insensitive mutant) and aba1...
November 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27694846/ein2-dependent-regulation-of-acetylation-of-histone-h3k14-and-non-canonical-histone-h3k23-in-ethylene-signalling
#17
Fan Zhang, Bin Qi, Likai Wang, Bo Zhao, Siddharth Rode, Nathaniel D Riggan, Joseph R Ecker, Hong Qiao
Ethylene gas is essential for many developmental processes and stress responses in plants. EIN2 plays a key role in ethylene signalling but its function remains enigmatic. Here, we show that ethylene specifically elevates acetylation of histone H3K14 and the non-canonical acetylation of H3K23 in etiolated seedlings. The up-regulation of these two histone marks positively correlates with ethylene-regulated transcription activation, and the elevation requires EIN2. Both EIN2 and EIN3 interact with a SANT domain protein named EIN2 nuclear associated protein 1 (ENAP1), overexpression of which results in elevation of histone acetylation and enhanced ethylene-inducible gene expression in an EIN2-dependent manner...
October 3, 2016: Nature Communications
https://www.readbyqxmd.com/read/27677986/ethylene-regulated-glutamate-dehydrogenase-fine-tunes-metabolism-during-anoxia-reoxygenation
#18
Kuen-Jin Tsai, Chih-Yu Lin, Chen-Yun Ting, Ming-Che Shih
Ethylene is an essential hormone in plants that is involved in low-oxygen and reoxygenation responses. As a key transcription factor in ethylene signaling, ETHYLENE INSENSITIVE3 (EIN3) activates targets that trigger various responses. However, most of these targets are still poorly characterized. Through analyses of our microarray data and the published Arabidopsis (Arabidopsis thaliana) EIN3 chromatin immunoprecipitation sequencing data set, we inferred the putative targets of EIN3 during anoxia-reoxygenation...
November 2016: Plant Physiology
https://www.readbyqxmd.com/read/27625669/analysis-of-network-topologies-underlying-ethylene-growth-response-kinetics
#19
Aaron M Prescott, Forest W McCollough, Bryan L Eldreth, Brad M Binder, Steven M Abel
Most models for ethylene signaling involve a linear pathway. However, measurements of seedling growth kinetics when ethylene is applied and removed have resulted in more complex network models that include coherent feedforward, negative feedback, and positive feedback motifs. The dynamical responses of the proposed networks have not been explored in a quantitative manner. Here, we explore (i) whether any of the proposed models are capable of producing growth-response behaviors consistent with experimental observations and (ii) what mechanistic roles various parts of the network topologies play in ethylene signaling...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27477591/peptides-interfering-with-protein-protein-interactions-in-the-ethylene-signaling-pathway-delay-tomato-fruit-ripening
#20
Melanie M A Bisson, Mareike Kessenbrock, Lena Müller, Alexander Hofmann, Florian Schmitz, Simona M Cristescu, Georg Groth
The plant hormone ethylene is involved in the regulation of several processes with high importance for agricultural applications, e.g. ripening, aging and senescence. Previous work in our group has identified a small peptide (NOP-1) derived from the nuclear localization signal of the Arabidopsis ethylene regulator ETHYLENE INSENSITIVE-2 (EIN2) C-terminal part as efficient inhibitor of ethylene responses. Here, we show that NOP-1 is also able to efficiently disrupt EIN2-ETR1 complex formation in tomato, indicating that the NOP-1 inhibition mode is conserved across plant species...
August 1, 2016: Scientific Reports
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