Review: How does a plant orchestrate defense in time and space? Using glucosinolates in Arabidopsis as case study
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Plants, like human societies, must live with the inherent conflict between investing in defense and investing in growth and infrastructure. Burrow and Halkier provide an interesting and highly readable overview of the strategies by which Arabidopsis optimizes the production and distribution of glucosinolates,…
A Possible Strategy for Increasing Methionine Titer in Seeds
Methionine is a nutritionally essential sulfur-containing amino acid found at low levels in plants and in their seeds. It often limits the nutritional value of crop plants as a source of dietary protein for humans and animals. In plants, methionine plays key roles in protein synthesis and mRNA translation,…
Secrets of the Forest: Volatiles First Discovered in Pine Trees Propagate Defense Signals Within and Between Plants
Systemic acquired resistance (SAR)—a plant-wide heightened state of defense following localized exposure to a pathogen—is characterized by increased salicylic acid (SA) and ROS levels and elevated expression of pathogenesis-related genes. SAR depends on ENHANCED DISEASE SUSCEPTIBILITY1 (EDS1), which…
Intricacies of Transcription Elongation
Antosz et al. provide insight into the complex process of transcription elongation by RNA polymerase II http://www.plantcell.org/content/29/4/854.abstract
The genetic blueprint for the production of proteins is stored in the DNA of a plant cell. In a first step, the enzyme RNA polymerase II generates…
Wild tobacco genomes reveal the evolution of nicotine biosynthesis
The genus Nicotiana encompasses several species and hybrids, the most famous being Nicotiana tabacum, cultivated for production of tobacco. Xu et al. sequenced the genome of Nicotiana attenuata and Nicotiana obtusifolia with an interest in identifying the origins of nicotine biosynthesis. Nicotine is…
Exploring the chemical diversity and distribution of marine cyanobacteria and algae through mass spectrometry
Like plants, algae and cyanobacteria produce a dizzying array of largely unexplored natural products that can be used as medicines, in biotechnology and in agriculture. Luzzatto-Knaan et al. used mass spectrometry (MS) to explore chemical diversity from marine samples collected across space and time.…
Review: Advances in methods for identification and characterization of plant transporter function ($)
Transporters are massively important for the functions of a cell and organism, but also notoriously difficult to study. Larsen et al. review advances in the tools available for transporter research, ranging from expression in Xenopus oocytes to genetic screens using toxic analogues and fluorescent substrates,…
A Flavone Synthase that Alters Lignin
Lignin, a ubiquitous phenylpropanoid polymer found in the cell walls of vascular plants, is derived primarily from oxidative couplings of monolignols (p-hydroxycinnamyl alcohols). By filling up spaces between cell wall polysaccharides (cellulose and hemicelluloses), lignin confers increased mechanical…
Transcriptome analysis illuminates the nature of the intracellular interaction in a vertebrate-algal symbiosis
Chloroplasts are of course the descendants of ancient endosymbiotic cyanobacteria. While there are examples of photosynthetic bacteria or algae living in animal tissues (e.g., anemones and corals), vertebrate endosymbiosis is rare. One exception is the interaction between a salamander Ambystoma maculatum…