L-histidine makes Ni 'visible' for plant signalling systems: Shading the light on Ni-induced Ca and redox signalling in plants.

Nickel is both an important nutrient and an ecotoxicant for plants. Organic ligands, such as L-histidine (His), play a key role in Ni detoxification. Here, we show that His (added together with 0.

Tobacco leaf tissue rapidly detoxifies direct salt loads without activation of calcium and SOS signaling.

Salt stress is a major abiotic stress, responsible for declining agricultural productivity. Roots are regarded as hubs for salt detoxification, however, leaf salt concentrations may exceed those of roots. How mature leaves manage acute sodium chloride (NaCl) stress is mostly unknown.

Stalk cell polar ion transport provide for bladder-based salinity tolerance in Chenopodium quinoa.

Chenopodium quinoa uses epidermal bladder cells (EBCs) to sequester excess salt. Each EBC complex consists of a leaf epidermal cell, a stalk cell, and the bladder. Under salt stress, sodium (Na ), chloride (Cl ), potassium (K ) and various metabolites are shuttled from the leaf lamina to the bladders.

Friend or Foe? Chloride Patterning in Halophytes.

In this opinion article, we challenge the traditional view that breeding for reduced Cl uptake would benefit plant salinity tolerance. A negative correlation between shoot Cl concentration and plant biomass does not hold for halophytes - naturally salt tolerant species. We argue that, under physiologically relevant conditions, Cl uptake requires plants to invest metabolic energy, and that the poor selectivity of Cl-transporting proteins may explain the reported negative correlation between Cl accumulation and crop salinity tolerance.