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https://www.readbyqxmd.com/read/29351892/identification-and-functional-analysis-of-cassava-della-proteins-in-plant-disease-resistance-against-cassava-bacterial-blight
#1
Xiaolin Li, Wen Liu, Bing Li, Guoyin Liu, Yunxie Wei, Chaozu He, Haitao Shi
Gibberellin (GA) is an essential plant hormone in plant growth and development as well as various stress responses. DELLA proteins are important repressors of GA signal pathway. GA and DELLA have been extensively investigated in several model plants. However, the in vivo roles of GA and DELLA in cassava, one of the most important crops and energy crops in the tropical area, are unknown. In this study, systematic genome-wide analysis identified 4 MeDELLAs in cassava, as evidenced by the evolutionary tree, gene structures and motifs analyses...
December 26, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29346521/the-intracellular-and-intercellular-cross-talk-during-subsidiary-cell-formation-in-zea-mays-existing-and-novel-components-orchestrating-cell-polarization-and-asymmetric-division
#2
P Apostolakos, P Livanos, E Giannoutsou, E Panteris, B Galatis
Background: Formation of stomatal complexes in Poaceae is the outcome of three asymmetric and one symmetric cell division occurring in particular leaf protodermal cells. In this definite sequence of cell division events, the generation of subsidiary cells is of particular importance and constitutes an attractive model for studying local intercellular stimulation. In brief, an induction stimulus emitted by the guard cell mother cells (GMCs) triggers a series of polarization events in their laterally adjacent protodermal cells...
January 15, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29339971/terzyme-a-tool-for-identification-and-analysis-of-the-plant-terpenome
#3
Piyush Priya, Archana Yadav, Jyoti Chand, Gitanjali Yadav
Background: Terpenoid hydrocarbons represent the largest and most ancient group of phytochemicals, such that the entire chemical library of a plant is often referred to as its 'terpenome'. Besides having numerous pharmacological properties, terpenes contribute to the scent of the rose, the flavors of cinnamon and the yellow of sunflowers. Rapidly increasing -omics datasets provide an unprecedented opportunity for terpenome detection, paving the way for automated web resources dedicated to phytochemical predictions in genomic data...
2018: Plant Methods
https://www.readbyqxmd.com/read/29339158/myosin-xi-localizes-at-the-mitotic-spindle-and-along-the-cell-plate-during-plant-cell-division-in-physcomitrella-patens
#4
Hao Sun, Fabienne Furt, Luis Vidali
Cell division is a fundamental biological process that has been extensively investigated in different systems. Similar to most eukaryotic cells, plant cells assemble a mitotic spindle to separate replicated chromosomes. In contrast, to complete cell division, plant cells assemble a phragmoplast, which is composed of aligned microtubules and actin filaments. This structure helps transport vesicles containing new cell wall material, which then fuse to form the cell plate; the cell plate will expand to create the new dividing cell wall...
January 12, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29332309/how-have-leaves-of-mycoheterotrophic-plants-evolved-from-the-view-point-of-a-developmental-biologist
#5
Hirokazu Tsukaya
How mycoheterotrophs have evolved and how they are sustained are an enigma. Structural analyses of the plastid genome and phylogenetic analyses of mycoheterotrophs have been used to identify mycorrhizal fungi. Molecular genetic studies have also revealed the mechanism for plant-fungi interactions. However, the evolution of the small, scale-like vegetative leaves of mycoheterotrophs is unknown. As almost all genes determining leaf size affect the floral organ sizes, it is highly implausible that loss-of-function mutations in leaf size regulators caused the evolution of smaller foliage leaves in mycoheterotrophs...
January 14, 2018: New Phytologist
https://www.readbyqxmd.com/read/29324998/introducing-turgor-driven-growth-dynamics-into-functional-structural-plant-models
#6
Jonas R Coussement, Tom De Swaef, Peter Lootens, Isabel Roldán-Ruiz, Kathy Steppe
Background and Aims: In many scenarios the availability of assimilated carbon is not the constraining factor of plant growth. Rather, organ growth appears driven by sink activity in which water availability plays a determinant role. Current functional-structural plant models (FSPMs) mainly focus on plant-carbon relations and largely disregard the importance of plant water status in organogenesis. Consequently, incorporating a turgor-driven growth concept, coupling carbon and water dynamics in an FSPM, presents a significant improvement towards capturing plant development in a more mechanistic manner...
January 9, 2018: Annals of Botany
https://www.readbyqxmd.com/read/29321897/nutrient-stoichiometry-and-land-use-rather-than-species-richness-determine-plant-functional-diversity
#7
Verena Busch, Valentin H Klaus, Caterina Penone, Deborah Schäfer, Steffen Boch, Daniel Prati, Jörg Müller, Stephanie A Socher, Ülo Niinemets, Josep Peñuelas, Norbert Hölzel, Markus Fischer, Till Kleinebecker
Plant functional traits reflect individual and community ecological strategies. They allow the detection of directional changes in community dynamics and ecosystemic processes, being an additional tool to assess biodiversity than species richness. Analysis of functional patterns in plant communities provides mechanistic insight into biodiversity alterations due to anthropogenic activity. Although studies have consi-dered of either anthropogenic management or nutrient availability on functional traits in temperate grasslands, studies combining effects of both drivers are scarce...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321872/relative-contribution-of-neutral-and-deterministic-processes-in-shaping-fruit-feeding-butterfly-assemblages-in-afrotropical-forests
#8
Kwaku Aduse-Poku, Freerk Molleman, William Oduro, Samuel K Oppong, David J Lohman, Rampal S Etienne
The unified neutral theory of biodiversity and biogeography has gained the status of a quantitative null model for explaining patterns in ecological (meta)communities. The theory assumes that individuals of trophically similar species are functionally equivalent. We empirically evaluate the relative contribution of neutral and deterministic processes in shaping fruit-feeding butterfly assemblages in three tropical forests in Africa, using both direct (confronting the neutral model with species abundance data) and indirect approaches (testing the predictions of neutral theory using data other than species abundance distributions)...
January 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29321529/multilayer-networks-reveal-the-spatial-structure-of-seed-dispersal-interactions-across-the-great-rift-landscapes
#9
Sérgio Timóteo, Marta Correia, Susana Rodríguez-Echeverría, Helena Freitas, Ruben Heleno
Species interaction networks are traditionally explored as discrete entities with well-defined spatial borders, an oversimplification likely impairing their applicability. Using a multilayer network approach, explicitly accounting for inter-habitat connectivity, we investigate the spatial structure of seed-dispersal networks across the Gorongosa National Park, Mozambique. We show that the overall seed-dispersal network is composed by spatially explicit communities of dispersers spanning across habitats, functionally linking the landscape mosaic...
January 10, 2018: Nature Communications
https://www.readbyqxmd.com/read/29320165/solution-nmr-structure-and-backbone-dynamics-of-the-partially-disordered-arabidopsis-thaliana-phloem-protein-16-1-a-putative-mrna-transporter
#10
Pulikallu Sashi, Kiran Kumar Singarapu, Abani K Bhuyan
Although RNA-binding proteins in plant phloem are believed to carry out long-distance systemic transport of RNA in the phloem conduit, the structure of none of them is known. The Arabidopsis thaliana phloem protein 16-1 (AtPP16-1) is such a putative mRNA transporter whose structure and backbone dynamics have been studied at pH 4.1, 25oC, by high-resolution NMR spectroscopy. Results obtained using basic optical spectroscopic tools show that the protein is unstable with little secondary structure near the physiological pH of the phloem sap...
January 10, 2018: Biochemistry
https://www.readbyqxmd.com/read/29304739/exploring-the-relationship-between-intron-retention-and-chromatin-accessibility-in-plants
#11
Fahad Ullah, Michael Hamilton, Anireddy S N Reddy, Asa Ben-Hur
BACKGROUND: Intron retention (IR) is the most prevalent form of alternative splicing in plants. IR, like other forms of alternative splicing, has an important role in increasing gene product diversity and regulating transcript functionality. Splicing is known to occur co-transcriptionally and is influenced by the speed of transcription which in turn, is affected by chromatin structure. It follows that chromatin structure may have an important role in the regulation of splicing, and there is preliminary evidence in metazoans to suggest that this is indeed the case; however, nothing is known about the role of chromatin structure in regulating IR in plants...
January 5, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29300872/a-generic-individual-based-model-to-simulate-morphogenesis-c-n-acquisition-and-population-dynamics-in-contrasting-forage-legumes
#12
Gaëtan Louarn, Lucas Faverjon
Background and Aims: Individual-based models (IBMs) are promising tools to disentangle plant interactions in multi-species grasslands and foster innovative species mixtures. This study describes an IBM dealing with the morphogenesis, growth and C-N acquisition of forage legumes that integrates plastic responses from functional-structural plant models. Methods: A generic model was developed to account for herbaceous legume species with contrasting above- and below-ground morphogenetic syndromes and to integrate the responses of plants to light, water and N...
December 29, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29300857/modelling-interaction-dynamics-between-two-foliar-pathogens-in-wheat-a-multi-scale-approach
#13
Guillaume Garin, Christophe Pradal, Christian Fournier, David Claessen, Vianney Houlès, Corinne Robert
Background and Aims: Disease models can improve our understanding of dynamic interactions in pathosystems and thus support the design of innovative and sustainable strategies of crop protections. However, most epidemiological models focus on a single type of pathogen, ignoring the interactions between different parasites competing on the same host and how they are impacted by properties of the canopy. This study presents a new model of a disease complex coupling two wheat fungal diseases, caused by Zymoseptoria tritici (septoria) and Puccinia triticina (brown rust), respectively, combined with a functional-structural plant model of wheat...
December 29, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29298676/a-multi-omics-approach-reveals-function-of-secretory-carrier-associated-membrane-proteins-in-wood-formation-of%C3%A2-%C3%A2-%C3%A2-populus%C3%A2-%C3%A2-%C3%A2-trees
#14
Ogonna Obudulu, Niklas Mähler, Tomas Skotare, Joakim Bygdell, Ilka N Abreu, Maria Ahnlund, Madhavi Latha Gandla, Anna Petterle, Thomas Moritz, Torgeir R Hvidsten, Leif J Jönsson, Gunnar Wingsle, Johan Trygg, Hannele Tuominen
BACKGROUND: Secretory Carrier-Associated Membrane Proteins (SCAMPs) are highly conserved 32-38 kDa proteins that are involved in membrane trafficking. A systems approach was taken to elucidate function of SCAMPs in wood formation of Populus trees. Phenotypic and multi-omics analyses were performed in woody tissues of transgenic Populus trees carrying an RNAi construct for Populus tremula x tremuloides SCAMP3 (PttSCAMP3; Potri.019G104000). RESULTS: The woody tissues of the transgenic trees displayed increased amounts of both polysaccharides and lignin oligomers, indicating increased deposition of both the carbohydrate and lignin components of the secondary cell walls...
January 3, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29298335/the-complex-nest-architecture-of-the-ponerinae-ant-odontomachus-chelifer
#15
Ingrid de Carvalho Guimarães, Márlon César Pereira, Nathan Rodrigues Batista, Candida Anitta Pereira Rodrigues, William Fernando Antonialli
In social insects, nests are very important structures built to provide a protected microhabitat for immature development and food storage and are the places where most interactions between all members of a colony occur. Considering that nest architecture is an important behavioural trait that can clarify essential points of the social level of the species, here we describe the architectural model of the Ponerinae ant Odontomachus chelifer. Five subterranean nests were excavated; one of them filled with liquid cement for extraction of casts of chambers, shafts and tunnels...
2018: PloS One
https://www.readbyqxmd.com/read/29295704/acyl-coa-binding-protein-family-members-in-laticifers-are-possibly-involved-in-lipid-and-latex-metabolism-of-hevea-brasiliensis-the-para-rubber-tree
#16
Zhiyi Nie, Yihang Wang, Chuntai Wu, Yu Li, Guijuan Kang, Huaide Qin, Rizhong Zeng
BACKGROUND: Acyl-CoA-binding proteins (ACBPs) are mainly involved in acyl-CoA ester binding and trafficking in eukaryotic cells, and their various functions have been characterized in model plants, such as Arabidopsis thaliana (A. thaliana), Oryza sativa (rice), and other plant species. In the present study, genome-wide mining and expression analysis of ACBP genes was performed on Hevea brasiliensis (the para rubber tree), the most important latex-producing crop in the world. RESULTS: Six members of the H...
January 2, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29288327/changes-in-the-abundance-of-cell-wall-apiogalacturonan-and-xylogalacturonan-and-conservation-of-rhamnogalacturonan-ii-structure-during-the-diversification-of-the-lemnoideae
#17
Utku Avci, Maria J Peña, Malcolm A O'Neill
The diversification of the Lemnoideae was accompanied by a reduction in the abundance of cell wall apiogalacturonan and an increase in xylogalacturonan whereas rhamnogalacturonan II structure and cross-linking are conserved. The subfamily Lemnoideae is comprised of five genera and 38 species of small, fast-growing aquatic monocots. Lemna minor and Spirodela polyrhiza belong to this subfamily and have primary cell walls that contain large amounts of apiogalacturonan and thus are distinct from the primary walls of most other flowering plants...
December 29, 2017: Planta
https://www.readbyqxmd.com/read/29280992/subtle-variation-in-shade-avoidance-responses-may-have-profound-consequences-for-plant-competitiveness
#18
Franca J Bongers, Ronald Pierik, Niels P R Anten, Jochem B Evers
Background and Aims: Although phenotypic plasticity has been shown to be beneficial for plant competitiveness for light, there is limited knowledge on how variation in these plastic responses plays a role in determining competitiveness. Methods: A combination of detailed plant experiments and functional-structural plant (FSP) modelling was used that captures the complex dynamic feedback between the changing plant phenotype and the within-canopy light environment in time and 3-D space...
December 21, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29259199/a-hydrophobic-anchor-mechanism-defines-a-deacetylase-family-that-suppresses-host-response-against-yopj-effectors
#19
Marco Bürger, Björn C Willige, Joanne Chory
Several Pseudomonas and Xanthomonas species are plant pathogens that infect the model organism Arabidopsis thaliana and important crops such as Brassica. Resistant plants contain the infection by rapid cell death of the infected area through the hypersensitive response (HR). A family of highly related α/β hydrolases is involved in diverse processes in all domains of life. Functional details of their catalytic machinery, however, remained unclear. We report the crystal structures of α/β hydrolases representing two different clades of the family, including the protein SOBER1, which suppresses AvrBsT-incited HR in Arabidopsis...
December 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/29241118/plhint-a-knowledge-driven-computational-approach-based-on-the-intermolecular-h-bond-interactions-at-the-protein-ligand-interface-from-docking-solutions
#20
Sivakumar Prasanth Kumar
The tendency of docking scoring functions to generate crystal close conformations of ligands bound to protein structures face limitations in not reproducing the exact crystal intermolecular contacts in dock poses. Intermolecular H bond contacts enumerated at the protein-docked ligand interface can be used to train scoring models and improve virtual screening performance. There is a need to incorporate additional knowledge of protein-ligand H bond contacts in extension to crystal contacts from docking solutions within the reproducibility efficiency of the docking program...
December 6, 2017: Journal of Molecular Graphics & Modelling
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