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https://www.readbyqxmd.com/read/28637270/in-planta-recapitulation-of-isoprene-synthases-evolution-from-ocimene-synthases
#1
Mingai Li, Jia Xu, Alberto Algarra Alarcon, Silvia Carlin, Enrico Barbaro, Luca Cappellin, Violeta Velikova, Urska Vrhovsek, Francesco Loreto, Claudio Varotto
Isoprene is the most abundant biogenic volatile hydrocarbon compound naturally emitted by plants and plays a major role in atmospheric chemistry. It has been proposed that isoprene synthases (IspS) may readily evolve from other terpene synthases, but this hypothesis has not been experimentally investigated.We isolated and functionally validated in Arabidopsis the first isoprene synthase gene, AdoIspS, from a monocotyledonous species (Arundo donax L., Poaceae). Phylogenetic reconstruction indicates that AdoIspS and dicots isoprene synthases most likely originated by parallel evolution from TPS-b monoterpene synthases...
June 16, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28626887/using-numerical-plant-models-and-phenotypic-correlation-space-to-design-achievable-ideotypes
#2
Victor Picheny, Pierre Casadebaig, Ronan Trépos, Robert Faivre, David Da Silva, Patrick Vincourt, Evelyne Costes
Numerical plant models can predict the outcome of plant traits modifications resulting from genetic variations, on plant performance, by simulating physiological processes and their interaction with the environment. Optimization methods complement those models to design ideotypes, i.e. ideal values of a set of plant traits resulting in optimal adaptation for given combinations of environment and management, mainly through the maximization of a performance criteria (e.g. yield, light interception). As use of simulation models gains momentum in plant breeding, numerical experiments must be carefully engineered to provide accurate and attainable results, rooting them in biological reality...
June 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28620034/structural-insights-into-the-alternative-oxidases-are-all-oxidases-made-equal
#3
REVIEW
Benjamin May, Luke Young, Anthony L Moore
The alternative oxidases (AOXs) are ubiquinol-oxidoreductases that are members of the diiron carboxylate superfamily. They are not only ubiquitously distributed within the plant kingdom but also found in increasing numbers within the fungal, protist, animal and prokaryotic kingdoms. Although functions of AOXs are highly diverse in general, they tend to play key roles in thermogenesis, stress tolerance (through the management of radical oxygen species) and the maintenance of mitochondrial and cellular energy homeostasis...
June 15, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28619047/environmental-isolation-explains-iberian-genetic-diversity-in-the-highly-homozygous-model-grass-brachypodium-distachyon
#4
Isabel Marques, Valeriia Shiposha, Diana López-Alvarez, Antonio J Manzaneda, Pilar Hernandez, Marina Olonova, Pilar Catalán
BACKGROUND: Brachypodium distachyon (Poaceae), an annual Mediterranean Aluminum (Al)-sensitive grass, is currently being used as a model species to provide new information on cereals and biofuel crops. The plant has a short life cycle and one of the smallest genomes in the grasses being well suited to experimental manipulation. Its genome has been fully sequenced and several genomic resources are being developed to elucidate key traits and gene functions. A reliable germplasm collection that reflects the natural diversity of this species is therefore needed for all these genomic resources...
June 15, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28611792/structural-and-functional-insights-into-wrky3-and-wrky4-transcription-factors-to-unravel-the-wrky-dna-w-box-complex-interaction-in-tomato-solanum-lycopersicum-l-a-computational-approach
#5
Mohd Aamir, Vinay K Singh, Mukesh Meena, Ram S Upadhyay, Vijai K Gupta, Surendra Singh
The WRKY transcription factors (TFs), play crucial role in plant defense response against various abiotic and biotic stresses. The role of WRKY3 and WRKY4 genes in plant defense response against necrotrophic pathogens is well-reported. However, their functional annotation in tomato is largely unknown. In the present work, we have characterized the structural and functional attributes of the two identified tomato WRKY transcription factors, WRKY3 (SlWRKY3), and WRKY4 (SlWRKY4) using computational approaches...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28611453/adaptive-carbon-allocation-by-plants-enhances-the-terrestrial-carbon-sink
#6
Jiangzhou Xia, Wenping Yuan, Ying-Ping Wang, Quanguo Zhang
Carbon allocation is one of the most important physiological processes to optimize the plant growth, which exerts a strong influence on ecosystem structure and function, with potentially large implications for the global carbon budget. However, it remains unclear how the carbon allocation pattern has changed at global scale and impacted terrestrial carbon uptake. Based on the Community Atmosphere Biosphere Land Exchange (CABLE) model, this study shows the increasing partitioning ratios to leaf and wood and reducing ratio to root globally from 1979 to 2014...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28607074/carbohydrate-microarrays-and-their-use-for-the-identification-of-molecular-markers-for-plant-cell-wall-composition
#7
Ian P Wood, Bruce M Pearson, Enriqueta Garcia-Gutierrez, Lenka Havlickova, Zhesi He, Andrea L Harper, Ian Bancroft, Keith W Waldron
Genetic improvement of the plant cell wall has enormous potential to increase the quality of food, fibers, and fuels. However, the identification and characterization of genes involved in plant cell wall synthesis is far from complete. Association mapping is one of the few techniques that can help identify candidate genes without relying on our currently incomplete knowledge of cell wall synthesis. However, few cell wall phenotyping methodologies have proven sufficiently precise, robust, or scalable for association mapping to be conducted for specific cell wall polymers...
June 12, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28602514/a-jasmonic-acid-derivative-improves-skin-healing-and-induces-changes-in-proteoglycan-expression-and-glycosaminoglycan-structure
#8
Elodie Henriet, Sibylle Jäger, Christian Tran, Philippe Bastien, Jean-François Michelet, Anne-Marie Minondo, Florian Formanek, Maria Dalko-Csiba, Hugues Lortat-Jacob, Lionel Breton, Romain R Vivès
BACKGROUND: Jasmonates are plant hormones that exhibit anti-cancer and anti-inflammatory properties and have therefore raised interest for human health applications. The molecular basis of these activities remains poorly understood, although increasing evidence suggests that a variety of mechanisms may be involved. Recently, we have reported that a jasmonate derivative (JAD) displayed anti-aging effects on human skin by inducing extracellular matrix (ECM) remodeling. Based on this observation, we have investigated here the effects of JAD on proteoglycans and glycosaminoglycan (GAG) polysaccharides, which are major cell-surface/ECM components and are involved in a multitude of biological processes...
June 7, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28598372/evaluation-of-the-cardiotoxicity-of-evodiamine-in-vitro-and-in-vivo
#9
Weifeng Yang, Lina Ma, Sidi Li, Kaiyu Cui, Lei Lei, Zuguang Ye
Evodiamine is a bioactive alkaloid that is specified as a biomarker for the quality assessment of Evodia rutaecarpa (E. rutaecarpa) and for traditional Chinese medicines containing this plant. We previously reported that quantitative structure-activity modeling indicated that evodiamine may cause cardiotoxicity. However, previous investigations have indicated that evodiamine has beneficial effects in patients with cardiovascular diseases and there are no previous in vitro or in vivo reports of evodiamine-induced cardiotoxicity...
June 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28596783/analysis-of-ef-hand-proteins-in-soybean-genome-suggests-their-potential-roles-in-environmental-and-nutritional-stress-signaling
#10
Houqing Zeng, Yaxian Zhang, Xiajun Zhang, Erxu Pi, Yiyong Zhu
Calcium ion (Ca(2+)) is a universal second messenger that plays a critical role in plant responses to diverse physiological and environmental stimuli. The stimulus-specific signals are perceived and decoded by a series of Ca(2+) binding proteins serving as Ca(2+) sensors. The majority of Ca(2+) sensors possess the EF-hand motif, a helix-loop-helix structure which forms a turn-loop structure. Although EF-hand proteins in model plant such as Arabidopsis have been well described, the identification, classification, and the physiological functions of EF-hand-containing proteins from soybean are not systemically reported...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28596552/genome-wide-survey-of-switchgrass-nacs-family-provides-new-insights-into-motif-and-structure-arrangements-and-reveals-stress-related-and-tissue-specific-nacs
#11
Haidong Yan, Ailing Zhang, Yuntian Ye, Bin Xu, Jing Chen, Xiaoyan He, Chengran Wang, Sifan Zhou, Xinquan Zhang, Yan Peng, Xiao Ma, Yanhong Yan, Linkai Huang
NAC proteins comprise of a plant-specific transcription factor (TF) family and play important roles in plant development and stress responses. Switchgrass (Panicum virgatum) is the prime candidate and model bioenergy grass across the world. Excavating agronomically valuable genes is important for switchgrass molecular breeding. In this study, a total of 251 switchgrass NAC (PvNACs) family genes clustered into 19 subgroups were analyzed, and those potentially involved in stress response or tissue-specific expression patterns were pinpointed...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28595570/plant-pectin-acetylesterase-structure-and-function-new-insights-from-bioinformatic-analysis
#12
Florian Philippe, Jérôme Pelloux, Catherine Rayon
BACKGROUND: Pectins are plant cell wall polysaccharides that can be acetylated on C2 and/or C3 of galacturonic acid residues. The degree of acetylation of pectin can be modulated by pectin acetylesterase (EC 3.1.1.6, PAE). The function and structure of plant PAEs remain poorly understood and the role of the fine-tuning of pectin acetylation on cell wall properties has not yet been elucidated. RESULTS: In the present study, a bioinformatic approach was used on 72 plant PAEs from 16 species among 611 plant PAEs available in plant genomic databases...
June 8, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28588593/salinity-induced-palmella-formation-mechanism-in-halotolerant-algae-dunaliella-salina-revealed-by-quantitative-proteomics-and-phosphoproteomics
#13
Sijia Wei, Yangyang Bian, Qi Zhao, Sixue Chen, Jiawei Mao, Chunxia Song, Kai Cheng, Zhen Xiao, Chuanfang Zhang, Weimin Ma, Hanfa Zou, Mingliang Ye, Shaojun Dai
Palmella stage is critical for some unicellular algae to survive in extreme environments. The halotolerant algae Dunaliella salina is a good single-cell model for studying plant adaptation to high salinity. To investigate the molecular adaptation mechanism in salinity shock-induced palmella formation, we performed a comprehensive physiological, proteomics and phosphoproteomics study upon palmella formation of D. salina using dimethyl labeling and Ti(4+)-immobilized metal ion affinity chromatography (IMAC) proteomic approaches...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28566481/defaunation-effects-on-plant-recruitment-depend-on-size-matching-and-size-trade-offs-in-seed-dispersal-networks
#14
Isabel Donoso, Matthias Schleuning, Daniel García, Jochen Fründ
Defaunation by humans causes a loss of large animals in many ecosystems globally. Recent work has emphasized the consequences of downsizing in animal communities for ecosystem functioning. However, no study so far has integrated network theory and life-history trade-offs to mechanistically evaluate the functional consequences of defaunation in plant-animal networks. Here, we simulated an avian seed-dispersal network and its derived ecosystem function seedling recruitment to assess the relative importance of different size-related mechanisms...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28558045/a-technique-system-for-the-measurement-reconstruction-and-character-extraction-of-rice-plant-architecture
#15
Xumeng Li, Xiaohui Wang, Hailin Wei, Xinguang Zhu, Yulin Peng, Ming Li, Tao Li, Huang Huang
This study developed a technique system for the measurement, reconstruction, and trait extraction of rice canopy architectures, which have challenged functional-structural plant modeling for decades and have become the foundation of the design of ideo-plant architectures. The system uses the location-separation-measurement method (LSMM) for the collection of data on the canopy architecture and the analytic geometry method for the reconstruction and visualization of the three-dimensional (3D) digital architecture of the rice plant...
2017: PloS One
https://www.readbyqxmd.com/read/28557013/unravelling-the-complexity-and-redundancy-of-carbon-catabolic-repression-in-the-plant-growth-promoting-bacterium-pseudomonas-fluorescens-sbw25
#16
Yunhao Liu, Chaitanya S Gokhale, Paul B Rainey, Xue-Xian Zhang
The two-component system CbrAB is the principal regulator for cellular metabolic balance in Pseudomonas fluorescens SBW25 and is necessary for growth on many substrates including xylose. To understand the regulatory linkage between CbrAB and genes for xylose utilization (xut), we performed transposon mutagenesis analysis of ΔcbrB to select for Xut(+) suppressors. This led to identification of crc and hfq. Subsequent genetic and biochemical analysis showed that Crc and Hfq are key mediators of succinate-provoked carbon catabolite repression (CCR)...
May 29, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28555318/conformational-characteristics-of-rice-hexokinase-oshxk7-as-a-moonlighting-protein-involved-in-sugar-signalling-and-metabolism
#17
Li Wang, Qing Dong, Qingdong Zhu, Niwen Tang, Shenghua Jia, Chao Xi, Heping Zhao, Shengcheng Han, Yingdian Wang
Hexokinase (HXK) as a moonlighting protein involves in glucose metabolism and signalling to regulate growth and development in plants. Therefore, the clarification for the structural properties of OsHXK7 (Oryza sativa Hexokinase 7) is essential to understand its role mechanism associated with the Glc signalling and metabolism. In this study, the structural characteristics of OsHXK7 (Oryza sativa Hexokinase 7) were identified. In the fluorescence spectrum, the Trp peak representing OsHXK7 binding to D-glucose (D-Glc) and 2-deoxyglucose (2-dG) showed an obvious blue shift...
May 29, 2017: Protein Journal
https://www.readbyqxmd.com/read/28555148/genome-wide-identification-of-orthologous-zip-genes-associated-with-zinc-and-iron-translocation-in-setaria-italica
#18
Ganesh Alagarasan, Mahima Dubey, Kumar S Aswathy, Girish Chandel
Genes in the ZIP family encode transcripts to store and transport bivalent metal micronutrient, particularly iron (Fe) and or zinc (Zn). These transcripts are important for a variety of functions involved in the developmental and physiological processes in many plant species, including most, if not all, Poaceae plant species and the model species Arabidopsis. Here, we present the report of a genome wide investigation of orthologous ZIP genes in Setaria italica and the identification of 7 single copy genes. RT-PCR shows 4 of them could be used to increase the bio-availability of zinc and iron content in grains...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28555147/contemporary-remotely-sensed-data-products-refine-invasive-plants-risk-mapping-in-data-poor-regions
#19
Tuyet T A Truong, Giles E St J Hardy, Margaret E Andrew
Invasive weeds are a serious problem worldwide, threatening biodiversity and damaging economies. Modeling potential distributions of invasive weeds can prioritize locations for monitoring and control efforts, increasing management efficiency. Forecasts of invasion risk at regional to continental scales are enabled by readily available downscaled climate surfaces together with an increasing number of digitized and georeferenced species occurrence records and species distribution modeling techniques. However, predictions at a finer scale and in landscapes with less topographic variation may require predictors that capture biotic processes and local abiotic conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28545577/proanthocyanidin-accumulation-and-transcriptional-responses-in-the-seed-coat-of-cranberry-beans-phaseolus-vulgaris-l-with-different-susceptibility-to-postharvest-darkening
#20
José A Freixas Coutin, Seth Munholland, Anjali Silva, Sanjeena Subedi, Lewis Lukens, William L Crosby, K Peter Pauls, Gale G Bozzo
BACKGROUND: Edible dry beans (Phaseolus vulgaris L.) that darken during postharvest storage are graded lower and are less marketable than their non-darkened counterparts. Seed coat darkening in susceptible genotypes is dependent upon the availability of proanthocyanidins, and their subsequent oxidation to reactive quinones. Mature cranberry beans lacking this postharvest darkening trait tend to be proanthocyanidin-deficient, although the underlying molecular and biochemical determinants for this metabolic phenomenon are unknown...
May 25, 2017: BMC Plant Biology
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