Recent Posts

Review. The Fast and The Furious: Rapid long-range signaling in plants (Plant Physiol)

Plants possess a complex series of local and systemic signaling networks driven by multiple stimuli. They translate this information into plant-wide response to coordinate their physiology and development.  Here, Johns et al. review these communication pathways, which function across different scales…

In vivo single-particle tracking of the aquaporin AtPIP2;1 in stomata reveals cell type-specific dynamics (Plant Physiol)

Bacteria can exploit the stomatal pores to gain entry into plant leaves. Previous studies have demonstrated that guard cells close in response to flagellin, an effect that is described as stomatal immunity. Like ABA-induced stomatal closure, this involves the movements of ions and water from the guard…

NPA directly binds to and inhibits PIN transporters (PNAS)

N-1-naphthylphthalamic acid (NPA) inhibits polar auxin transport (PAT). Though used for over six decades, the precise mechanism by which it inhibits PAT is still unclear. A new study by Abas and colleagues now suggests that NPA directly associates with and inhibits the activity of PIN-FORMED (PIN) transporters.…

Review: Mesophyll conductance: walls, membranes and spatial complexity (New Phytol.)

There’s been a lot of talk lately about how to improve the carboxylation efficiency of Rubisco, but of course this also depends on how much CO2 reaches the enzyme within the chloroplasts. To do so, it needs to pass through several distinct barriers: the boundary layer to reach the leaf surface, the…

Identification of a unique ZIP transporter involved in zinc uptake via the arbuscular mycorrhizal fungal pathway (bioRxiv)

Last week, PSRW presented two review papers regarding host plant interactions with microbial populations, particularly for plant nutrient intake. Watt-Williams et al. utilize such knowledge for their paper, performing an RNA-seq dataset to identify a novel zinc transporter in Medicago truncatula. Zinc…

The calcium-permeable channel OSCA1.3 regulates plant stomatal immunity (Nature)

In plants, the perception of environmental threats induces a peak of calcium ions (Ca2+) in the cytosol that triggers signal transduction pathways leading to stomatal closure as defense response. In Arabidopsis, the mechanosensitive Ca2+ channel OSCA1 regulates water transpiration in response to…

Lipid distribution in cuticles affects flower architecture in Medicago (Plant Physiol.)

Floral architecture influences pollination and reproduction: open flowers facilitate cross-pollination, while closed flowers limit outcross. Some plants of the Leguminosae family (i.e., members of the Papilionoideae subfamily that includes soybean, pea, medicago, lotus) possess a complex architecture,…

Review. Plant nutrition for human nutrition: Hints from rice research and future perspectives

Among all the mineral elements transported from the soil to the plant, cadmium (Cd) and arsenic (As)- are toxic for all organisms whereas 13 micronutrients, including iron (Fe) and zinc (Zn), are beneficial for both human and plant nutrition. Ideally, food crops should accumulate fewer soil contaminants…

Vacuolar channel CLCa is involved in guard cell pH homeostasis (PNAS)

In plants, stomata are involved in a host of responses, controlled by ion homeostasis in guard cells. In an attempt to understand the function of a plant chloride channel (CLC), CLCa, which transports chloride (Cl-) and nitrate (NO3-) in guard cells, Demes and colleagues sought to establish a relationship…