Silicon alleviates deleterious effects of high salinity on the halophytic grass Spartina densiflora.

The non-essential element silicon is known to improve plant fitness by alleviating the effects of biotic and abiotic stresses, particularly in crops. However, its possible role in the exceptional tolerance of halophytes to salinity has not been investigated. This study reports the effect of Si supply on the salinity tolerance of the halophytic grass Spartina densiflora; plants were treated with NaCl (0-680 mM), with or without silicon addition of 500 μM, in a glasshouse experiment.

Tolerance to and accumulation of arsenic in the cordgrass Spartina densiflora Brongn.

A glasshouse study concerning the halophyte Spartina densiflora was carried out to determine its tolerance and capacity to accumulate As. S. densiflora presented a high tolerance to As-induced stress, since all plants were able to survive at concentrations higher than 6.

Synergic effect of salinity and zinc stress on growth and photosynthetic responses of the cordgrass, Spartina densiflora.

Spartina densiflora is a C(4) halophytic species that has proved to have a high invasive potential which derives from its physiological plasticity to environmental factors, such as salinity. It is found in coastal marshes of south-west Spain, growing over sediments with between 1 mmol l(-1) and 70 mmol l(-1) zinc. A glasshouse experiment was designed to investigate the synergic effect of zinc from 0 mmol l(-1) to 60 mmol l(-1) at 0, 1, and 3% NaCl on the growth and the photosynthetic apparatus of S.

Spartina densiflora demonstrates high tolerance to phenanthrene in soil and reduces it concentration.

The present study was conducted to investigate the tolerance of Spartina densiflora to phenanthrene, and to test its ability in phenanthrene dissipation. A glasshouse experiment was designed to investigate the effect of phenanthrene from 0 to 1000 mg kg(-1) on growth and photosynthetic apparatus of S. densiflora by measuring chlorophyll fluorescence parameters, gas exchange and photosynthetic pigments.

Accumulation and tolerance characteristics of cadmium in a halophytic Cd-hyperaccumulator, Arthrocnemum macrostachyum.

The potential of the extreme halophyte Arthrocnemum macrostachyum was examined to determine its tolerance and ability to accumulate cadmium for phytoremediation purposes. A glasshouse experiment was designed to investigate the effect of cadmium from 0 to 1.35 mmol l(-1) on the growth and the photosynthetic apparatus of A.