Plant and Seed Biology
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Cell - Structural Basis for DNA Binding Specificity by the Auxin-Dependent ARF Transcription Factors

Cell - Structural Basis for DNA Binding Specificity by the Auxin-Dependent ARF Transcription Factors | Plant and Seed Biology | Scoop.it
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A Peptide Hormone and Its Receptor Protein Kinase Regulate Plant Cell Expansion

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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Plant domestication versus crop evolution: a conceptual framework for cereals and grain legumes

Plant domestication versus crop evolution: a conceptual framework for cereals and grain legumes | Plant and Seed Biology | 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. In this opinion article, we refine the DS concept using agronomic, genetic, and archaeobotanical considerations by distinguishing crucial domestication traits from traits that probably evolved post-domestication in Near Eastern grain crops. We propose that only traits showing a clear domesticated–wild dimorphism represent the pristine domestication episode, whereas traits showing a phenotypic continuum between wild and domesticated gene pools mostly reflect post-domestication diversification. We propose that our approach may apply to other crop types and examine its implications for discussing the timeframe of plant domestication and for modern plant science and breeding.

 


Via Christophe Jacquet
Christophe Jacquet's curator insight, January 6, 2014 7:39 AM

Highlights•

We introduce the concept of crucial ‘domestication syndrome’ (DS) traits.

Crucial DS traits are part of the features distinguishing crops from wild forms.

The crucial DS concept improves understanding of prehistoric domestication episodes.

Using the crucial DS concept may enhance future crop improvement capacity.

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Advanced imaging techniques for the study of plant growth and development

Advanced imaging techniques for the study of plant growth and development | Plant and Seed Biology | Scoop.it
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Timing Mechanism Dependent on Cell Division Is Invoked by Polycomb Eviction in Plant Stem Cells

Timing Mechanism Dependent on Cell Division Is Invoked by Polycomb Eviction in Plant Stem Cells | Plant and Seed Biology | Scoop.it
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Seaweed Filament : l'impression 3D écologique !

Seaweed Filament : l'impression 3D écologique ! | Plant and Seed Biology | Scoop.it
Il deviendra possible d'imprimer des objets en 3D sans utiliser de plastique : le Seaweed Filament.
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miR828 and miR858 regulate homoeologous MYB2 gene functions in Arabidopsis trichome and cotton fibre development : Nature Communications

miR828 and miR858 regulate homoeologous MYB2 gene functions in Arabidopsis trichome and cotton fibre development : Nature Communications | Plant and Seed Biology | Scoop.it
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