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Genetic, biochemical and high-resolution structural studies of chloroplast protein SOQ1 reveal the existence of a C-terminal lumenal domain with potential redox function and its essential role for suppressing photoprotection in plants.
Organisms living at elevation are exposed to a constant state of hypoxia compared to those at low altitude. A recent study1 has shown that flowering plants acclimatize to high altitude through natural variation in molecular oxygen (O2) sensing, with high-altitude populations exhibiting increased O2 sensitivity to balance physiological and metabolic outputs. This finding demonstrates convergent mechanisms for altitude adaptation across eukaryotic kingdoms despite differences in the hypoxia-signalling pathways of plants and animals.
Over the last few months a new article type has appeared in our table of contents; the Research Briefing. What are they and why have we started to publish them?
Rubisco in seagrasses converged on lower catalytic efficiencies and CO2/O2 affinities than in their terrestrial and freshwater relatives, as a result of correlative adaptation between Rubisco and the effectiveness of their CO2-concentrating mechanisms.
Arabidopsis embryonic root development involves the formation of distinct cell types and tissues in a tightly regulated and thereby highly predictable spatio-temporal manner. A crosstalk between maternal and embryonic genes orchestrates division orientation and fate specification to control root development.
An embryo-maternal communication orchestrates cell division orientation and cell fate specification during embryonic root development. This signalling is mediated by the WIP gene family members expressed embryonically and maternally.
Methylation is a frequent modification of glycans and polysaccharides. This process relies on the transport of cytosolic S-adenosyl-l-methionine (SAM) into the Golgi lumen. This work identifies Golgi-localized major facilitator superfamily transporter members as putative SAM transporters in plants and reveals their importance for polysaccharide methylation and maintenance of the properties of cell walls.
The normalized difference vegetation index is an established remote sensing indicator for measuring greenspace, but this Letter highlights a potential drawback to be taken into account when applying the index in urban areas.
How pathogen signals perceived by receptor kinases activate plant immunity is not fully understood. Here the authors show that phosphocoding of a shared phosphatase ensures signalling from growth and immune receptors to specific cellular responses.
S-acylation modifies cysteine residues of proteins with fatty acid moieties. An optimized acyl-resin-assisted capture assay was used to perform a comprehensive analysis of plant protein S-acylation. These data provide an atlas of S-acylation in Arabidopsis.
Pyruvate use in respiration or biosynthesis is a pivotal decision in cells. The identification of two distinct pools of pyruvate inside plant mitochondria demonstrates the heterogeneity and flexibility of pyruvate use in plant metabolism.
Polysaccharide methylation, important for cell wall structure and function, occurs in the Golgi and relies on the import of S-adenosyl methionine (SAM) molecules into the Golgi lumen by Golgi SAM transporters. This work shows the discovery and relevance of putative SAM transporters.
Division tracking of mesophyll cells shows that initial division plane orientations alternate creating cell walls at right angles, and intercellular spaces. Disruption of this pattern halts initiation of multi-cell junctions and intercellular spaces.