Recent Posts

Adjusting Boron Transport by Two-Step Tuning of Levels of the Efflux Transporter BOR1

Boron is an essential plant micronutrient with the narrowest optimal range in the soil of any micronutrient. At neutral pH, boron is present as uncharged boric acid, B(OH)3, which can freely penetrate membranes. Boron plays an important role in cross-linking cell wall components, but boron starvation…

Developing High-Yield Early-Maturation Crops by Manipulating Nitrogen Utilization

Wang et al. investigate the function of OsNRT1.1A in rice. Plant Cell (2018). https://doi.org/10.1105/tpc.17.00809. By Wei Wang, Bin Hu and Chengcai Chu Background: To cope with an increasing global population and decreasing availability of arable land, improving crop yield is a major agricultural…

Update: Cation/H+ transporters affect membrane trafficking

By Heven Sze and Salil Chanroj. Plants remodel their cells through the dynamic endomembrane system. Intracellular pH is important for membrane trafficking, but the determinants of pH homeostasis are poorly defined in plants. Electrogenic proton (H+) pumps depend on counter-ion fluxes to establish…

Lipid Anchor: Postal Code for Proteins on the Road to Membranes

Majeran et al. investigate how plant cells target proteins to membrane compartments https://doi.org/10.1105/tpc.17.00523 By Wojciech Majeran, Thierry Meinnel & Carmela Giglione Background: Living cells are encased in an oily barrier, the plasma membrane, made up of a double layer of lipids…

Mechanisms of Long-Distance mRNA Movement

Phloem has long been recognized as a tissue that transports carbohydrates and amino acids. In recent years, however, it has also been found that this tissue serves as a conduit for signals, e.g., mRNAs, small RNAs, proteins, small peptides, and hormones.  Several classical studies have shown that certain…

Review: Venus Flytrap: How an excitable, carnivorous plant works ($) (Trends Plant Sci)

The one sure-fire way to get children excited about plants is to show them how a Venus flytrap works. But how does it work? We’ve all heard that the trap “counts” the number times it is triggered, and that it requires two or more touches in quick succession to close – but how does it count? Hedrich…

Iron availability sensed in leaf vasculature causes changes in transcriptional programs (Plant Cell Environ)

Iron is an essential micronutrient for plants but it is often not bioavailable in the soil. Thus, plants have evolved difference processes for iron sensing and iron uptake. OLIGOPEPTIDE TRANSPORTER 3 (OPT3) is an important iron transporter and is a component of the systemic network that mediates iron…

Metal sensing by the IRT1 transporter-receptor (Mol. Cell)

Plants need some but not too much iron, so the regulation of iron transporters is quite tight. IRT1 is a broad-spectrum metal transporter that is crucial for iron uptake (mutants can only be rescued by massive amounts of iron). IRT1 synthesis is transcriptionally upregulated by iron limitation, and although…

Role of a Medicago truncatula citrate transporter in symbiotic nitrogen fixation (Plant Physiol.)

Iron, an essential nutrient for plants and symbiotic nitrogen-fixing bacteria, needs to be complexed with organic chelators (i.e. citrate) for in planta transport. Kryvoruchko and colleagues have identified a nodule-specific citrate transporter of Medicago truncatula, MtMATE67 (Medicago truncatula Multidrug…