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https://www.readbyqxmd.com/read/28441405/mediator18-and-mediator20-confer-susceptibility-to-fusarium-oxysporum-in-arabidopsis-thaliana
#1
Thorya Fallath, Brendan N Kidd, Jiri Stiller, Celine Davoine, Stefan Björklund, John M Manners, Kemal Kazan, Peer M Schenk
The conserved protein complex known as Mediator conveys transcriptional signals by acting as an intermediary between transcription factors and RNA polymerase II. As a result, Mediator subunits play multiple roles in regulating developmental as well as abiotic and biotic stress pathways. In this report we identify the head domain subunits MEDIATOR18 and MEDIATOR20 as important susceptibility factors for Fusarium oxysporum infection in Arabidopsis thaliana. Mutants of MED18 and MED20 display down-regulation of genes associated with jasmonate signaling and biosynthesis while up-regulation of salicylic acid associated pathogenesis related genes and reactive oxygen producing and scavenging genes...
2017: PloS One
https://www.readbyqxmd.com/read/28440947/regulation-of-the-turnover-of-acc-synthases-by-phytohormones-and-heterodimerization-in-arabidopsis
#2
Han Yong Lee, Yi-Chun Chen, Joseph J Kieber, Gyeong Mee Yoon
Ethylene influences many aspects of plant growth and development. The biosynthesis of ethylene is highly regulated by a variety of internal and external cues. A key target of this regulation is 1-aminocyclopropane-1-carboxylic acid (ACC) synthases (ACS), generally the rate-limiting step in ethylene biosynthesis, which is regulated both transcriptionally and post-transcriptionally. Prior studies have demonstrated that cytokinin and brassinosteroid (BR) act as regulatory inputs to elevate ethylene biosynthesis by increasing the stability of ACS proteins...
April 25, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28437665/jasmonic-acid-signalling-and-the-plant-holobiont
#3
REVIEW
Lilia C Carvalhais, Peer M Schenk, Paul G Dennis
The plant holobiont - which is the plant and its associated microbiome - is increasingly viewed as an evolving entity. Some interacting microbes that compose the microbiome assist plants in combating pathogens and herbivorous insects. However, knowledge of the factors that influence the microbiome in the context of defence signalling pathways is still in its infancy. Recent research reported that changes in jasmonic acid (JA) and salicylic acid signalling affects the root microbiome of Arabidopsis thaliana...
April 21, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/28434411/direct-and-indirect-resistance-of-sugarcane-to-diatraea-saccharalis-induced-by-jasmonic-acid
#4
P A Sanches, F Santos, M F G V Peñaflor, J M S Bento
Treating plants with synthetic jasmonic acid (JA) induces a defensive response similar to herbivore attack, and is a potential strategy for integrated pest management. Despite the importance of sugarcane, its JA-induced defences have not yet been studied. We investigated the effects of JA treatment on the direct and indirect resistance of sugarcane to the key-pest and specialist herbivore Diatraea saccharalis and the generalist Spodoptera frugiperda. Indirect defences were examined by testing the attraction of Cotesia flavipes, a sugarcane-borer parasitoid, to JA-induced volatile...
April 24, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28432333/metabolomic-and-proteomic-analysis-of-maize-embryonic-callus-induced-from-immature-embryo
#5
Fei Ge, Hongmei Hu, Xing Huang, Yanling Zhang, Yanli Wang, Zhaoling Li, Chaoying Zou, Huanwei Peng, Lujiang Li, Shibin Gao, Guangtang Pan, Yaou Shen
The low ratio of embryonic callus (EC) induction has inhibited the rapid development of maize genetic engineering. Still, little is known to explain the genotype-dependence of EC induction. Here, we performed a large-scale, quantitative analysis of the maize EC metabolome and proteome at three typical induction stages in two inbred lines with a range of EC induction capabilities. Comparison of the metabolomes and proteomes suggests that the differential molecular responses begin at an early stage of development and continue throughout the process of EC formation...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428792/identification-of-candidate-genes-and-biosynthesis-pathways-related-to-fertility-conversion-by-wheat-ktm3315a-transcriptome-profiling
#6
Jiali Ye, Yang Duan, Gan Hu, Xingxia Geng, Gaoming Zhang, Pengjiao Yan, Zihan Liu, Lingli Zhang, Xiyue Song
The Aegilops kotschyi thermo-sensitive cytoplasmic male sterility (K-TCMS) system may facilitate hybrid wheat (Triticum aestivum L.) seed multiplication and production. The K-TCMS line is completely male sterile during the normal wheat-growing season, whereas its fertility can be restored in a high-temperature environment. To elucidate the molecular mechanisms responsible for male sterility/fertility conversion and candidate genes involved with pollen development in K-TCMS, we employed RNA-seq to sequence the transcriptomes of anthers from K-TCMS line KTM3315A during development under sterile and fertile conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28425831/investigating-the-phylogenetic-range-of-gibberellin-biosynthesis-in-bacteria
#7
Raimund Nagel, Reuben J Peters
Certain plant-associated microbes can produce gibberellin (GA) phytohormones, as first described for the rice fungal pathogen Gibberella fujikuroi and, more recently, for bacteria, including several rhizobia and the rice bacterial pathogen Xanthomonas oryzae pv. oryzicola. The relevant enzymes are encoded by a biosynthetic operon that exhibits both a greater phylogenetic range and scattered distribution among plant-associated bacteria. Here, the phylogenetic distribution of this operon was investigated. To demonstrate conserved functionality, the enzymes encoded by the disparate operon from X...
April 20, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28424944/indirect-interactions-between-arbuscular-mycorrhizal-fungi-and-spodoptera-exigua-alter-photosynthesis-and-plant-endogenous-hormones
#8
Lei He, Changyou Li, Runjin Liu
Peanut (Arachis hypogaea Linn. cv: Luhua 11) and tomato (Lycopersicon esculentum Mill. cv: Zhongshu 4) were inoculated with arbuscular mycorrhizal fungi (AMF) Funneliformis mosseae BEG167 (Fm), Rhizophagus intraradices BEG141 (Ri), and Glomus versiforme Berch (Gv), and/or Spodoptera exigua (S. exigua) under greenhouse conditions. Results indicated that feeding by S. exigua had little influence on colonization of peanut plants by AMF, but improved colonization of tomato by Fm and Gv. Feeding by S. exigua had little influence on leaf net photosynthetic rate, transpiration rate, and stomatal conductance of nonmycorrhizal peanut plants but significantly improved net photosynthetic rate and transpiration rate of mycorrhizal plants of both hosts...
April 20, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28424874/identification-of-osmyc2-regulated-senescence-associated-genes-in-rice
#9
Yuya Uji, Kazuya Akimitsu, Kenji Gomi
The jasmonic acid (JA)-responsive transcription factor OsMYC2 acts as a positive regulator of leaf senescence by direct regulation of some senescence-associated genes in rice. OsMYC2, a transcription factor (TF), acts as a positive regulator of jasmonic acid (JA) signaling involved in development and defense in rice. Here, we report that OsMYC2 plays an important role in leaf senescence under dark-induced senescence (DIS) conditions. Overexpression of OsMYC2 significantly promoted leaf senescence, indicated by reduction of chlorophyll content under DIS conditions in rice...
April 19, 2017: Planta
https://www.readbyqxmd.com/read/28424711/genomic-molecular-evolution-and-expression-analysis-of-genes-encoding-putative-classical-agps-lysine-rich-agps-and-ag-peptides-in-brassica-rapa
#10
Tianyu Han, Heng Dong, Jie Cui, Ming Li, Sue Lin, Jiashu Cao, Li Huang
Arabinogalactan proteins (AGPs) belong to a class of Pro/Hyp-rich glycoproteins and are some of the most complex types of macromolecules found in plants. In the economically important plant species, Brassica rapa, only chimeric AGPs have been identified to date. This has significantly limited our understanding of the functional roles of AGPs in this plant. In this study, 64 AGPs were identified in the genome of B. rapa, including 33 classical AGPs, 28 AG peptides and three lys-rich AGPs. Syntenic gene analysis between B...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28424511/response-of-peanut-arachis-hypogaea-roots-to-the-presence-of-beneficial-and-pathogenic-fungi-by-transcriptome-analysis
#11
Kun Hao, Feng Wang, Xiangqun Nong, Mark Richard McNeill, Shaofang Liu, Guangjun Wang, Guangchun Cao, Zehua Zhang
Entomopathogenic fungus Metarhizium anisopliae obtain survival benefit meanwhile promote the nutrient absorption of root as an endophyte. However, little is known concerning molecular mechanisms in the process. We performed the transcriptome sequencing of A. hypogaea roots inoculated M. anisopliae and pathogenic Fusarium axysporum, respectively. There were 81323 unigenes from 132023 transcripts. Total 203 differentially expressed genes (DEGs) respond to the two fungi, including specific 76 and 34 DEGs distributed respectively in M...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28422432/ja-but-not-ja-ile-is-the-cell-nonautonomous-signal-activating-ja-mediated-systemic-defenses-to-herbivory-in-nicotiana-attenuata
#12
Tohir A Bozorov, Son Truong Dinh, Ian T Baldwin
The whole-plant activation of defense responses to wounding and herbivory requires systemic signaling in which jasmonates (JAs) play a pivotal role. To examine the nature of the slower cell- nonautonomous as compared to the rapid cell-autonomous signal in mediating systemic defenses in Nicotiana attenuata, reciprocal stem grafting-experiments were used with plants silenced the JA biosynthetic gene ALLENE OXIDE CYCLASE (irAOC) or plants transformed to create JA sinks by ectopically expressing Arabidopsis JA-O-methyltransferase (ovJMT)...
April 19, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28421828/jasmonic-acid-changes-the-composition-of-essential-oil-isolated-from-narrow-leaved-lavender-propagated-in-in-vitro-cultures
#13
D Andrys, M Adaszyńska-Skwirzyńska, D Kulpa
The aim of the present study was to determine the effect of jasmonic acid added to the culture medium on composition of Lavandula angustifolia essential oils. The chemical composition was determined by gas chromatography coupled to mass detector (GC/MS). The experiment was conducted with the use of MS medium supplemented with increasing concentration of JA (0.2, 0.5, 1, 1.5 mg∙dm(-3)). It was found that the analysed essential oils varied in terms of chemical composition depending on the content of JA in the medium...
April 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28421096/regulation-of-banana-phytoene-synthase-mapsy-expression-characterization-and-their-modulation-under-various-abiotic-stress-conditions
#14
Navneet Kaur, Ashutosh Pandey, Shivani, Prateek Kumar, Pankaj Pandey, Atul K Kesarwani, Shrikant S Mantri, Praveen Awasthi, Siddharth Tiwari
Phytoene synthase (PSY) is a key regulatory enzyme of carotenoid biosynthesis pathway in plants. The present study examines the role of PSY in carotenogenesis and stress management in banana. Germplasm screening of 10 Indian cultivars showed that Nendran (3011.94 μg/100 g dry weight) and Rasthali (105.35 μg/100 g dry weight) contained the highest and lowest amounts of β-carotene, respectively in ripe fruit-pulp. Nendran ripe pulp also showed significantly higher antioxidant activity as compared to Rasthali...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28420557/temporal-and-spatial-view-of-jasmonate-signaling
#15
Huanhuan Jin, Ziqiang Zhu
The jasmonate signaling pathway has been established for 10 years. Nonetheless, two recent reports suggest that its temporal and spatial regulation is worth further investigation. These reports show that jasmonate responses decay gradually with increasing plant age and that signaling components vary between different tissues.
April 15, 2017: Trends in Plant Science
https://www.readbyqxmd.com/read/28419906/plant-hormone-signaling-in-flowering-an-epigenetic-point-of-view
#16
REVIEW
Gerardo Campos-Rivero, Pedro Osorio-Montalvo, Rafael Sánchez-Borges, Rosa Us-Camas, Fátima Duarte-Aké, Clelia De-la-Peña
Reproduction is one of the most important phases in an organism's lifecycle. In the case of angiosperm plants, flowering provides the major developmental transition from the vegetative to the reproductive stage, and requires genetic and epigenetic reprogramming to ensure the success of seed production. Flowering is regulated by a complex network of genes that integrate multiple environmental cues and endogenous signals so that flowering occurs at the right time; hormone regulation, signaling and homeostasis are very important in this process...
March 31, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28418581/leaf-rust-infection-reduces-herbivore-induced-volatile-emission-in-black-poplar-and-attracts-a-generalist-herbivore
#17
Franziska Eberl, Almuth Hammerbacher, Jonathan Gershenzon, Sybille B Unsicker
Plants release complex volatile blends after separate attack by herbivores and pathogens, which play many roles in interactions with other organisms. Large perennials are often attacked by multiple enemies, but the effect of combined attacks on volatile emission is rarely studied, particularly in trees. We infested Populus nigra trees with a pathogen, the rust fungus Melampsora larici-populina, and Lymantria dispar caterpillars alone and in combination. We investigated poplar volatile emission and its regulation, as well as the behavior of the caterpillars towards volatiles from rust-infected and uninfected trees...
April 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28416693/insect-haptoelectrical-stimulation-of-venus-flytrap-triggers-exocytosis-in-gland-cells
#18
Sönke Scherzer, Lana Shabala, Benjamin Hedrich, Jörg Fromm, Hubert Bauer, Eberhard Munz, Peter Jakob, Khaled A S Al-Rascheid, Ines Kreuzer, Dirk Becker, Monika Eiblmeier, Heinz Rennenberg, Sergey Shabala, Malcolm Bennett, Erwin Neher, Rainer Hedrich
The Venus flytrap Dionaea muscipula captures insects and consumes their flesh. Prey contacting touch-sensitive hairs trigger traveling electrical waves. These action potentials (APs) cause rapid closure of the trap and activate secretory functions of glands, which cover its inner surface. Such prey-induced haptoelectric stimulation activates the touch hormone jasmonate (JA) signaling pathway, which initiates secretion of an acidic hydrolase mixture to decompose the victim and acquire the animal nutrients. Although postulated since Darwin's pioneering studies, these secretory events have not been recorded so far...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28412928/poplar-stem-transcriptome-is-massively-remodelled-in-response-to-single-or-repeated-mechanical-stimuli
#19
Lise Pomiès, Mélanie Decourteix, Jérôme Franchel, Bruno Moulia, Nathalie Leblanc-Fournier
BACKGROUND: Trees experience mechanical stimuli -like wind- that trigger thigmomorphogenetic syndrome, leading to modifications of plant growth and wood quality. This syndrome affects tree productivity but is also believed to improve tree acclimation to chronic wind. Wind is particularly challenging for trees, because of their stature and perenniality. Climate change forecasts are predicting that the occurrence of high wind will worsen, making it increasingly vital to understand the mechanisms regulating thigmomorphogenesis, especially in perennial plants...
April 17, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28411688/anti-inflammatory-and-membrane-stabilizing-properties-of-methyl-jasmonate-in-rats
#20
Solomon Umukoro, Akinyinka Oladipo Alabi, Anthony Taghogho Eduviere, Abayomi Mayowa Ajayi, Oluwafemi Gabriel Oluwole
The present investigation was carried out to evaluate anti-inflammatory and membrane stabilizing properties of methyl jasmonate (MJ) in experimental rat models of acute and chronic inflammation. The effects of MJ on acute inflammation were assessed using carrageenan-induced rat's paw edema model. The granuloma air pouch model was employed to evaluate the effects of MJ on chronic inflammation produced by carrageenan in rats. The number of white blood cells (WBC) in pouch exudates was estimated using light microscopy...
March 2017: Chinese Journal of Natural Medicines
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