PlantBioInnovation
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PlantBioInnovation
Discovery and Invention Aspects of Plant Biology That Are Interesting, Innovative and Novel !
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Scooped by Biswapriya Biswavas Misra
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Tetramer formation in Arabidopsis MADS domain proteins: analysis of a protein-protein interaction network

Background:
MADS domain proteins are transcription factors that coordinate several important developmental processes in plants.
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Crystal structures of virus-like photosystem I complexes from the mesophilic cyanobacterium Synechocystis PCC 6803

Biswapriya Biswavas Misra's insight:
Oxygenic photosynthesis supports virtually all life forms on earth. Light energy is converted by two photosystems—photosystem I (PSI) and photosystem II (PSII). Globally, nearly 50% of photosynthesis takes place in the Ocean, where single cell cyanobacteria and algae reside together with their viruses. An operon encoding PSI was identified in cyanobacterial marine viruses. We generated a PSI that mimics the salient features of the viral complex, named PSIPsaJF. PSIPsaJF is promiscuous for its electron donors and can accept electrons from respiratory cytochromes. We solved the structure of PSIPsaJF and a monomeric PSI, with subunit composition similar to the viral PSI, providing for the first time a detailed description of the reaction center and antenna system from mesophilic cyanobacteria, including red chlorophylls and cofactors of the electron transport chain. Our finding extends the understanding of PSI structure, function and evolution and suggests a unique function for the viral PSI. - See more at: http://elife.elifesciences.org/content/3/e01496#.dpufOxygenic photosynthesis supports virtually all life forms on earth. Light energy is converted by two photosystems—photosystem I (PSI) and photosystem II (PSII). Globally, nearly 50% of photosynthesis takes place in the Ocean, where single cell cyanobacteria and algae reside together with their viruses. An operon encoding PSI was identified in cyanobacterial marine viruses. We generated a PSI that mimics the salient features of the viral complex, named PSIPsaJF. PSIPsaJF is promiscuous for its electron donors and can accept electrons from respiratory cytochromes. We solved the structure of PSIPsaJF and a monomeric PSI, with subunit composition similar to the viral PSI, providing for the first time a detailed description of the reaction center and antenna system from mesophilic cyanobacteria, including red chlorophylls and cofactors of the electron transport chain. Our finding extends the understanding of PSI structure, function and evolution and suggests a unique function for the viral PSI. - See more at: http://elife.elifesciences.org/content/3/e01496#.dpuf
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A Peptide Hormone and Its Receptor Protein Kinase Regulate Plant Cell Expansion

Biswapriya Biswavas Misra's insight:

Plant cells are immobile; thus, plant growth and development depend on cell expansion rather than cell migration. The molecular mechanism by which the plasma membrane initiates changes in the cell expansion rate remains elusive. We found that a secreted peptide, RALF (rapid alkalinization factor), suppresses cell elongation of the primary root by activating the cell surface receptor FERONIA in Arabidopsis thaliana. A direct peptide-receptor interaction is supported by specific binding of RALF to FERONIA and reduced binding and insensitivity to RALF-induced growth inhibition in feronia mutants. Phosphoproteome measurements demonstrate that the RALF-FERONIA interaction causes phosphorylation of plasma membrane H+–adenosine triphosphatase 2 at Ser899, mediating the inhibition of proton transport. The results reveal a molecular mechanism for RALF-induced extracellular alkalinization and a signaling pathway that regulates cell expansion.

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miR828 and miR858 regulate homoeologous MYB2 ge...

miR828 and miR858 regulate homoeologous MYB2 ge... | PlantBioInnovation | Scoop.it
miR828 and miR858 regulate homoeologous MYB2 gene functions in Arabidopsis trichome and cotton fibre development : Nature Communications on Plant and Seed Biology curated by Loïc Lepiniec (miR828 and miR858 regulate homoeologous MYB2 gene functions...
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ECHIDNA protein impacts on male fertility in Arabidopsis by ...

ECHIDNA protein impacts on male fertility in Arabidopsis by ... | PlantBioInnovation | Scoop.it
Abstract. The Trans-Golgi Network (TGN) plays a central role in cellular secretion and has been implicated in sorting cargo destined for the plasma membrane. Previously the Arabidopsis echidna (ech) mutant was shown to ...
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Cell - Rain-, wind-, and touch-induced expression of calmodulin and calmodulin-related genes in Arabidopsis

.@angerstusson as good as #TalkingHeads may be they don't induce Arabidopsis touch-sensitive genes http://t.co/NH3dnn2lnE via @CellCellPress
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MAB4-induced auxin sink generates local auxin gradients in Arabidopsis organ formation

[PNAS] Auxin sink generates local auxin gradients [Plant Biology]: In Arabidopsis, leaves and flowers form cyc... http://t.co/J9j80FGMLk
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Plant & Crop Science Blog: Breeding quinoa (Chenopodium quinoa Willd.): potential and perspectives

Plant & Crop Science Blog: Breeding quinoa (Chenopodium quinoa Willd.): potential and perspectives | PlantBioInnovation | Scoop.it
Plant & Crop Science Blog: Breeding quinoa (Chenopodium quinoa Willd.): poten... http://t.co/RhCLRHOsbC
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An E4 Ligase Facilitates Polyubiquitination of Plant Immune Receptor Resistance Proteins in Arabidopsis

An E4 Ligase Facilitates Polyubiquitination of Plant Immune Receptor Resistance Proteins in Arabidopsis | PlantBioInnovation | Scoop.it
MUSE3 - An E4 ligase facilitates polyubiquitination of plant immune receptors in Arabidopsis #plantsci http://t.co/Xr8vlVybJO
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Ecological Succession and Stochastic Variation in the Assembly of Arabidopsis thaliana Phyllosphere Communities

Ecological Succession and Stochastic Variation in the Assembly of Arabidopsis thaliana Phyllosphere Communities http://t.co/hXKg36PbjQ
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Pathogenic plant virus jumps to honeybees

Pathogenic plant virus jumps to honeybees | PlantBioInnovation | Scoop.it
A viral pathogen that typically infects plants has been found in honeybees and could help explain their decline. Researchers working in the U.S.
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Arabidopsis RECEPTOR-LIKE PROTEIN30 and Receptor-Like Kinase SUPPRESSOR OF BIR1-1/EVERSHED Mediate Innate Immunity to Necrotrophic Fungi - Worcester Research and Publications

Arabidopsis RECEPTOR-LIKE PROTEIN30 and Receptor-Like Kinase SUPPRESSOR OF BIR1-1/EVERSHED Mediate Innate Immu... http://t.co/vwA0nzZV9E
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Development and characterization of 96 microsatellite markers suitable for QTL mapping and accession control in an Arabidopsis core collection

To identify plant genes involved in various key traits, QTL mapping is a powerful approach.
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A secreted Ustilago maydis effector promotes virulence by targeting anthocyanin biosynthesis in maize

Biswapriya Biswavas Misra's insight:
The biotrophic fungus Ustilago maydis causes smut disease in maize with characteristic tumor formation and anthocyanin induction. Here, we show that anthocyanin biosynthesis is induced by the virulence promoting secreted effector protein Tin2. Tin2 protein functions inside plant cells where it interacts with maize protein kinase ZmTTK1. Tin2 masks a ubiquitin–proteasome degradation motif in ZmTTK1, thus stabilizing the active kinase. Active ZmTTK1 controls activation of genes in the anthocyanin biosynthesis pathway. Without Tin2, enhanced lignin biosynthesis is observed in infected tissue and vascular bundles show strong lignification. This is presumably limiting access of fungal hyphae to nutrients needed for massive proliferation. Consistent with this assertion, we observe that maize brown midrib mutants affected in lignin biosynthesis are hypersensitive to U. maydis infection. We speculate that Tin2 rewires metabolites into the anthocyanin pathway to lower their availability for other defense responses. - See more at: http://elife.elifesciences.org/content/3/e01355#.dpuf
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Journal Highlight: Peptide prefractionation is essential for proteomic ... - separationsNOW.com

Journal Highlight: Peptide prefractionation is essential for proteomic ... - separationsNOW.com | PlantBioInnovation | Scoop.it
separationsNOW.com
Journal Highlight: Peptide prefractionation is essential for proteomic ...
separationsNOW.com
Abstract: Off-gel™ IEF has become a popular tool in proteomics research to fractionate peptides or proteins.
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Plant domestication versus crop evolution: a co...

Plant domestication versus crop evolution: a co... | PlantBioInnovation | Scoop.it
Domestication syndrome’ (DS) denotes differences between domesticated plants and their wild progenitors. Crop plants are dynamic entities; hence, not all parameters distinguishing wild progenitors from cultigens resulted from domestication.
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Rescooped by Biswapriya Biswavas Misra from Plant Biology Teaching Resources (Higher Education)
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Science: Identification of a Plant Receptor for... - Scoop.it

Science: Identification of a Plant Receptor for... - Scoop.it | PlantBioInnovation | Scoop.it
... to Nucleotides 1)." | Plant Biology Teaching Resources (Higher Education) ... PNAS: Perennial grasslands enhance biodiversity and multiple ecosystem services in bioenergy landscapes | Plant Biology.

Via Mary Williams
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Mary Williams's curator insight, January 17, 6:45 AM

Interesting. For a historical perspective on the role of ATP as an extacellular signal in animals, see this article in Bioessays:

http://onlinelibrary.wiley.com/doi/10.1002/bies.201100130/abstract.

 

(This cute figure is from the supplemental materials)

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ARP2/3 complex-mediated actin dynamics is required for hydrogen peroxide-induced stomatal closure in Arabidopsis

ARP2/3 complex-mediated actin dynamics is required for hydrogen peroxide-induced stomatal closure in Arabidopsis | PlantBioInnovation | Scoop.it
ARP2/3 complex-mediated actin dynamics is required for hydrogen peroxide-induced stomatal closure in Arabidopsis http://t.co/8Pxaw6HobD
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Identification of a Plant Receptor for Extracellular ATP

RT @sciencemagazine: Identification of a plant receptor for ATP http://t.co/T2AWAU6jT9 #Arabidopsis #plantbio
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Nitrogen dioxide regulates organ growth by controlling cell proliferation and enlargement in Arabidopsis

Nitrogen dioxide regulates organ growth by controlling cell proliferation and enlargement in Arabidopsis | PlantBioInnovation | Scoop.it
RT @NewPhyt: Nitrogen dioxide regulates organ growth by controlling cell proliferation and enlargement in Arabidopsis http://t.co/7h94LGxGip
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A Generic Tool for Transcription Factor Target Gene Discovery in Arabidopsis Cell Suspension Cultures Based on Tandem Chromatin Affinity Purification

A Generic Tool for Transcription Factor Target Gene Discovery in Arabidopsis Cell Suspension Cultures Based on Tandem Chromatin Affinity Purification | PlantBioInnovation | Scoop.it
Tandem affinitiy-based ChIP of E2F in Arabidopsis thaliana now in Breakthrough Technologies @PlantPhys http://t.co/gTYj2JNihO
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MYB34, MYB51 and MYB122 Distinctly Regulate Ind...

MYB34, MYB51 and MYB122 Distinctly Regulate Ind... | PlantBioInnovation | Scoop.it
The MYB34, MYB51 and MYB122 transcription factors are known to regulate indolic glucosinolate (IG) biosynthesis in Arabidopsis thaliana.
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CLE-CLAVATA1 peptide-receptor signaling module regulates the expansion of plant root systems in a nitrogen-dependent manner

RT @plantbiology: PNAS "Expansion of plant root system under N deficiency [Plant Biology]" http://t.co/BuKkhx3R9V
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Genome-wide quantification of homeolog expressi...

Genome-wide quantification of homeolog expressi... | PlantBioInnovation | Scoop.it
Genome duplication with hybridization, or allopolyploidization, occurs commonly in plants, and is considered to be a strong force for generating new species.
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Cysteine and Cysteine-Related Signaling Pathway...

Cysteine and Cysteine-Related Signaling Pathway... | PlantBioInnovation | Scoop.it
Andres Zurita's insight: Cysteine occupies a central position in plant metabolism because it is a reduced sulfur donor molecule involved in the synthesis of essential biomolecules and defense compounds.
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