Recent Posts

Similar yet different: A leaf photosynthetic cell type reveals its unique molecular blueprint

Procko et al. investigate the molecular identities of specialized photosynthetic cell types in leaves. https://doi.org/10.1093/plcell/koac167 By Carl Procko and Travis Lee. Salk Institute for Biological Studies, CA Background: Photosynthesis is arguably the most important biochemical process…

Spatial resolution of an integrated C4+CAM photosynthetic metabolism (Sci. Advances)

C4 and CAM are both photosynthetic strategies that concentrate CO2 upstream of RuBisCO, somewhat uncoupling photosynthetic carbon fixation from transpirational water loss. Both strategies use the enzyme PEP-carboxylase to produce an organic acid, which can then be decarboxylated to provide CO2 to RuBisCO.…

Microalgae concentrate CO2 to ameliorate oxidative stress

Choi et al. report that the Chlamydomonas bZIP transcription factor BLZ8 induces the carbon-concentrating mechanism to provide an electron sink pathway, reducing reactive oxygen species production under oxidative stress conditions. Plant Cell. https://doi.org/10.1093/plcell/koab293 By Bae Young Choi,…

Leaf cell-specific and single-cell transcriptional profiling reveals a role for the palisade layer in UV light protection (Plant Cell)

Leaves are the specialized organs of the plant that have evolved to maximize the use of light and CO2 for efficient photosynthesis. Although knowledge of photosynthesis has exploded recently, the molecular intricacies underlying leaf anatomy, especially mesophyll, remains unravelled. The palisade mesophyll…

Flavodiiron proteins enhance the rate of CO2 assimilation in Arabidopsis under fluctuating light intensity (Plant Physiol)

Plants must adjust to varying levels of light in order to optimize photosynthetic rates; too little electron transport and plants will incur an energetic penalty, while excessive excitation of photosystem I leads to photodamage. During high light conditions, the increase in DpH acts as a brake on electron…

Carbon flux through photosynthesis and central carbon metabolism show distinct patterns between algae, C3, and C4 plants (Nature Plants)

Photosynthesis is an attractive target for improving crop yields, and tailoring downstream photosynthesis-associated metabolism is a relatively unexplored path for achieving this. Chlorella ohadii is the fastest growing photosynthetic organism identified, has high photosynthetic rates, and can survive…

Structural organization of the spongy mesophyll (New Phytol.)

Despite a large variation in leaf morphology, laminar leaf anatomy is largely conserved, comprising two developmentally distinct mesophyll tissues, the palisade and spongy mesophyll. Spongy mesophyll cells along with intercellular spaces form an interconnected network to maximize the surface area for…

Anchoring Membranes in Cyanobacteria

Ostermeier et al. introduce AncM, a new factor for structuring the photosynthetic membrane system in cyanobacteria. Plant Cell https://doi.org/10.1093/plcell/koab253 By Matthias Ostermeier, Steffen Heinz and Jörg Nickelsen at Molecular Plant Science at LMU Munich Background: Cyanobacteria are…

Transcriptome sequencing of a novel albino mutant of hexaploid sweetpotato (Plant Mol Biol Rep)

Albino plants lack chlorophyll, which means that they cannot photosynthesize. These kinds of plant are unique and can offer information as to the molecular mechanism of chlorophyll degradation and photosynthesis in plants. Here, Arisha et al. explored the differences in gene expression patterns of seedling…