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https://www.readbyqxmd.com/read/27918078/nuclear-ca-2-signalling-in-arbuscular-mycorrhizal-and-actinorhizal-endosymbioses-on-the-trail-of-novel-underground-signals
#1
REVIEW
David G Barker, Mireille Chabaud, Guilia Russo, Andrea Genre
I. II. III. IV. References SUMMARY: Root endosymbioses are beneficial associations formed between terrestrial plants and either bacterial or fungal micro-organisms. A common feature of these intracellular symbioses is the requirement for mutual recognition between the two partners before host-regulated microbial entry. As part of this molecular dialogue, symbiosis-specific microbial factors set in motion a highly conserved plant signal transduction pathway, of which a central component is the activation of sustained nuclear Ca(2+) oscillations in target cells of the host epidermis...
December 5, 2016: New Phytologist
https://www.readbyqxmd.com/read/27917168/the-absence-of-the-n-acyl-homoserine-lactone-autoinducer-synthase-genes-trai-and-ngri-increases-the-copy-number-of-the-symbiotic-plasmid-in-sinorhizobium-fredii-ngr234
#2
Jessica Grote, Dagmar Krysciak, Katrin Petersen, Simon Güllert, Christel Schmeisser, Konrad U Förstner, Hari B Krishnan, Harald Schwalbe, Nina Kubatova, Wolfgang R Streit
Plant-released flavonoids induce the transcription of symbiotic genes in rhizobia and one of the first bacterial responses is the synthesis of so called Nod factors. They are responsible for the initial root hair curling during onset of root nodule development. This signal exchange is believed to be essential for initiating the plant symbiosis with rhizobia affiliated with the Alphaproteobacteria. Here, we provide evidence that in the broad host range strain Sinorhizobium fredii NGR234 the complete lack of quorum sensing molecules results in an elevated copy number of its symbiotic plasmid (pNGR234a)...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27895225/loss-of-inositol-phosphorylceramide-sphingolipid-mannosylation-induces-plant-immune-responses-and-reduces-cellulose-content-in-arabidopsis
#3
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/27874990/plant-volatile-mediated-signalling-and-its-application-in-agriculture-successes-and-challenges
#4
REVIEW
John A Pickett, Zeyaur R Khan
856 I. 856 II. 857 III. 858 IV. 859 V. 860 VI. 862 VII. 863 VIII. 864 IX. 866 866 References 866 SUMMARY: The mediation of volatile secondary metabolites in signalling between plants and other organisms has long been seen as presenting opportunities for sustainable crop protection. Initially, exploitation of interactions between plants and other organisms, particularly insect pests, foundered because of difficulties in delivering, sustainably, the signal systems for crop protection. We now have mounting and, in some cases, clear practical evidence for successful delivery by companion cropping or next-generation genetic modification (GM)...
December 2016: New Phytologist
https://www.readbyqxmd.com/read/27870873/herbivore-induced-dna-demethylation-changes-floral-signalling-and-attractiveness-to-pollinators-in-brassica-rapa
#5
Roman T Kellenberger, Philipp M Schlüter, Florian P Schiestl
Plants have to fine-tune their signals to optimise the trade-off between herbivore deterrence and pollinator attraction. An important mechanism in mediating plant-insect interactions is the regulation of gene expression via DNA methylation. However, the effect of herbivore-induced DNA methylation changes on pollinator-relevant plant signalling has not been systematically investigated. Here, we assessed the impact of foliar herbivory on DNA methylation and floral traits in the model crop plant Brassica rapa...
2016: PloS One
https://www.readbyqxmd.com/read/27847509/the-class-ii-trehalose-6-phosphate-synthase-gene-pvtps9-modulates-trehalose-metabolism-in-phaseolus-vulgaris-nodules
#6
Aarón Barraza, Cecilia Contreras-Cubas, Georgina Estrada-Navarrete, José L Reyes, Marco A Juárez-Verdayes, Nelson Avonce, Carmen Quinto, Claudia Díaz-Camino, Federico Sanchez
Legumes form symbioses with rhizobia, producing nitrogen-fixing nodules on the roots of the plant host. The network of plant signaling pathways affecting carbon metabolism may determine the final number of nodules. The trehalose biosynthetic pathway regulates carbon metabolism and plays a fundamental role in plant growth and development, as well as in plant-microbe interactions. The expression of genes for trehalose synthesis during nodule development suggests that this metabolite may play a role in legume-rhizobia symbiosis...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27833621/transcriptional-basis-of-drought-induced-susceptibility-to-the-rice-blast-fungus-magnaporthe-oryzae
#7
Przemyslaw Bidzinski, Elsa Ballini, Aurélie Ducasse, Corinne Michel, Paola Zuluaga, Annamaria Genga, Remo Chiozzotto, Jean-Benoit Morel
Plants are often facing several stresses simultaneously. Understanding how they react and the way pathogens adapt to such combinational stresses is poorly documented. Here, we developed an experimental system mimicking field intermittent drought on rice followed by inoculation by the pathogenic fungus Magnaporthe oryzae. This experimental system triggers an enhancement of susceptibility that could be correlated with the dampening of several aspects of plant immunity, namely the oxidative burst and the transcription of several pathogenesis-related genes...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27700227/the-response-of-soybean-to-nod-factors-and-a-bacteriocin
#8
Kaberi Gautam, Timothy D Schwinghamer, Donald L Smith
Microbe-to-plant signals can enhance the growth of a wide range of crops. The responses by soybean (Glycine max var. 91M01) to two signal molecules were investigated: Bradyrhizobium japonicum 532C lipo-chitooligosaccharide (Nod Bj V [C:18, MeFuc]) (LCO); and Bacillus thuringiensis strain NEB17 bacteriocin thuricin 17 (Th17). The objective was to assess and quantify the response by soybean, in terms of factors that contribute to yield, to the experimental signal molecules in germination experiments and field experiments...
October 4, 2016: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/27649738/unveiling-the-molecular-details-of-plant-signaling
#9
Nancy R Gough
This Editorial Guide describes emerging areas of signaling research for plants. Advances in this area are key to preserving nature and maintaining the planet's health while feeding a growing human population.
2016: Science Signaling
https://www.readbyqxmd.com/read/27623305/opening-the-gates-insights-into-cyclic-nucleotide-gated-channel-mediated-signaling
#10
Thomas A DeFalco, Wolfgang Moeder, Keiko Yoshioka
Recent work has expanded our understanding of the roles of cyclic nucleotide-gated channels (CNGCs) in plant signaling. In this spotlight article, we discuss advances and future perspectives in determining how CNGCs mediate calcium signaling in response to diverse stimuli.
September 9, 2016: Trends in Plant Science
https://www.readbyqxmd.com/read/27530354/cannabidiolic-acid-mediated-selective-down-regulation-of-c-fos-in-highly-aggressive-breast-cancer-mda-mb-231-cells-possible-involvement-of-its-down-regulation-in-the-abrogation-of-aggressiveness
#11
Shuso Takeda, Taichi Himeno, Kazuhiro Kakizoe, Hiroyuki Okazaki, Tomoko Okada, Kazuhito Watanabe, Hironori Aramaki
The physiological activities of cannabidiolic acid (CBDA), a component of fiber-type cannabis plants, have been demonstrated and include its function as a protector against external invasion by inducing cannabinoid-mediated necrosis (Shoyama et al., Plant Signal Behav 3:1111-1112, 2008). The biological activities of CBDA have been attracting increasing attention. We previously identified CBDA as an inhibitor of the migration of MDA-MB-231 cells, a widely used human breast cancer cell line in cancer biology, due to its highly aggressive nature...
August 16, 2016: Journal of Natural Medicines
https://www.readbyqxmd.com/read/27528115/editorial-overview-cell-signalling-and-gene-regulation-the-many-layers-of-plant-signalling
#12
Kimberley C Snowden, Dirk Inzé
No abstract text is available yet for this article.
October 2016: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/27486195/a-luxr-homolog-in-a-cottonwood-tree-endophyte-that-activates-gene-expression-in-response-to-a-plant-signal-or-specific-peptides
#13
Amy L Schaefer, Yasuhiro Oda, Bruna Goncalves Coutinho, Dale A Pelletier, Justin Weiburg, Vittorio Venturi, E Peter Greenberg, Caroline S Harwood
UNLABELLED: Homologs of the LuxR acyl-homoserine lactone (AHL) quorum-sensing signal receptor are prevalent in Proteobacteria isolated from roots of the Eastern cottonwood tree, Populus deltoides Many of these isolates possess an orphan LuxR homolog, closely related to OryR from the rice pathogen Xanthomonas oryzae OryR does not respond to AHL signals but, instead, responds to an unknown plant compound. We discovered an OryR homolog, PipR, in the cottonwood endophyte Pseudomonas sp. strain GM79...
2016: MBio
https://www.readbyqxmd.com/read/27455172/farnesylation-mediates-brassinosteroid-biosynthesis-to-regulate-abscisic-acid-responses
#14
Julian G B Northey, Siyu Liang, Muhammad Jamshed, Srijani Deb, Eloise Foo, James B Reid, Peter McCourt, Marcus A Samuel
Protein farnesylation is a post-translational modification involving the addition of a 15-carbon farnesyl isoprenoid to the carboxy terminus of select proteins(1-3). Although the roles of this lipid modification are clear in both fungal and animal signalling, many of the mechanistic functions of farnesylation in plant signalling are still unknown. Here, we show that CYP85A2, the cytochrome P450 enzyme that performs the last step in brassinosteroid biosynthesis (conversion of castasterone to brassinolide)(4), must be farnesylated to function in Arabidopsis...
2016: Nature Plants
https://www.readbyqxmd.com/read/27446133/mining-functional-modules-in-heterogeneous-biological-networks-using-multiplex-pagerank-approach
#15
Jun Li, Patrick X Zhao
Identification of functional modules/sub-networks in large-scale biological networks is one of the important research challenges in current bioinformatics and systems biology. Approaches have been developed to identify functional modules in single-class biological networks; however, methods for systematically and interactively mining multiple classes of heterogeneous biological networks are lacking. In this paper, we present a novel algorithm (called mPageRank) that utilizes the Multiplex PageRank approach to mine functional modules from two classes of biological networks...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27435853/the-multifaceted-roles-of-hy5-in-plant-growth-and-development
#16
Sreeramaiah N Gangappa, Javier F Botto
ELONGATED HYPOCOTYL5 (HY5), a member of the bZIP transcription factor family, inhibits hypocotyl growth and lateral root development, and promotes pigment accumulation in a light-dependent manner in Arabidopsis. Recent research on its role in different processes such as hormone, nutrient, abiotic stress (abscisic acid, salt, cold), and reactive oxygen species signaling pathways clearly places HY5 at the center of a transcriptional network hub. HY5 regulates the transcription of a large number of genes by directly binding to cis-regulatory elements...
October 10, 2016: Molecular Plant
https://www.readbyqxmd.com/read/27392034/an-indirect-defence-trait-mediated-through-egg-induced-maize-volatiles-from-neighbouring-plants
#17
Daniel M Mutyambai, Toby J A Bruce, Johnnie van den Berg, Charles A O Midega, John A Pickett, Zeyaur R Khan
Attack of plants by herbivorous arthropods may result in considerable changes to the plant's chemical phenotype with respect to emission of herbivore-induced plant volatiles (HIPVs). These HIPVs have been shown to act as repellents to the attacking insects as well as attractants for the insects antagonistic to these herbivores. Plants can also respond to HIPV signals from other plants that warn them of impending attack. Recent investigations have shown that certain maize varieties are able to emit volatiles following stemborer egg deposition...
2016: PloS One
https://www.readbyqxmd.com/read/27377547/identification-of-candidate-domestication-regions-in-the-radish-genome-based-on-high-depth-resequencing-analysis-of-17-genotypes
#18
Namshin Kim, Young-Min Jeong, Seongmun Jeong, Goon-Bo Kim, Seunghoon Baek, Young-Eun Kwon, Ara Cho, Sang-Bong Choi, Jiwoong Kim, Won-Jun Lim, Kyoung Hyoun Kim, Won Park, Jae-Yoon Kim, Jin-Hyun Kim, Bomi Yim, Young Joon Lee, Byung-Moon Chun, Young-Pyo Lee, Beom-Seok Park, Hee-Ju Yu, Jeong-Hwan Mun
This study provides high-quality variation data of diverse radish genotypes. Genome-wide SNP comparison along with RNA-seq analysis identified candidate genes related to domestication that have potential as trait-related markers for genetics and breeding of radish. Radish (Raphanus sativus L.) is an annual root vegetable crop that also encompasses diverse wild species. Radish has a long history of domestication, but the origins and selective sweep of cultivated radishes remain controversial. Here, we present comprehensive whole-genome resequencing analysis of radish to explore genomic variation between the radish genotypes and to identify genetic bottlenecks due to domestication in Asian cultivars...
September 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27338492/flavones-from-biosynthesis-to-health-benefits
#19
REVIEW
Nan Jiang, Andrea I Doseff, Erich Grotewold
Flavones correspond to a flavonoid subgroup that is widely distributed in the plants, and which can be synthesized by different pathways, depending on whether they contain C- or O-glycosylation and hydroxylated B-ring. Flavones are emerging as very important specialized metabolites involved in plant signaling and defense, as well as key ingredients of the human diet, with significant health benefits. Here, we appraise flavone formation in plants, emphasizing the emerging theme that biosynthesis pathway determines flavone chemistry...
2016: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/27330114/photoreceptor-effects-on-plant-biomass-resource-allocation-and-metabolic-state
#20
Deyue Yang, Daniel D Seaton, Johanna Krahmer, Karen J Halliday
Plants sense the light environment through an ensemble of photoreceptors. Members of the phytochrome class of light receptors are known to play a critical role in seedling establishment, and are among the best-characterized plant signaling components. Phytochromes also regulate adult plant growth; however, our knowledge of this process is rather fragmented. This study demonstrates that phytochrome controls carbon allocation and biomass production in the developing plant. Phytochrome mutants have a reduced CO2 uptake, yet overaccumulate daytime sucrose and starch...
July 5, 2016: Proceedings of the National Academy of Sciences of the United States of America
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