Cross-tolerance to abiotic stresses in halophytes: Application for phytoremediation of organic pollutants

International audienceHalopytes are plants able to tolerate high salt concentrations but no clear definition was retained for them. In literature, there are more studies that showed salt-enhanced tolerance to other abiotic stresses compared to investigations that found enhanced salt tolerance by other abiotic stresses in halophytes. The phenomenon by which a plant resistance to a stress induces resistance to another is referred to as cross-tolerance. In this work, we reviewed cross-tolerance in halophytes at the physiological, biochemical, and molecular levels. A special attention was accorded to the cross-tolerance between salinity and organic pollutants that could allow halophytes a higher potential of xenobiotic phytoremediation in comparison with glycophytes

Phosphoproteomic Analysis Reveals that Dehydrins ERD10 and ERD14 are Phosphorylated by SNF1-related Protein Kinase 2.10 in Response to Osmotic Stress

SNF1-related protein kinases 2 (SnRK2s) regulate the plant responses to abiotic stresses, especially water deficits. They are activated in plants subjected to osmotic stress, and some of them are additionally activated in response to enhanced concentrations of abscisic acid (ABA) in plant cells. The SnRK2s that are activated in response to ABA are key elements of ABA signaling that regulate plant acclimation to environmental stresses and ABA-dependent development. Much less is known about the SnRK2s that are not activated by ABA, albeit several studies have shown that these kinases are also involved in response to osmotic stress. Here, we show that one of the Arabidopsis thaliana ABA-non-activated SnRK2s, SnRK2.10, regulates not only the response to salinity but also the plant sensitivity to dehydration. Several potential SnRK2.10 targets phosphorylated in response to stress were identified by a phosphoproteomic approach, including the dehydrins ERD10 and ERD14. Their phosphorylation by SnRK2.10 was confirmed in vitro. Our data suggest that the phosphorylation of ERD14 within the S-segment is involved in the regulation of dehydrin subcellular localization in response to stress

Synthesis and characterization of C, N, S and Fe modified TiO2 nanophotocatalysist: Efficiency on the degradation of methyl orange and levafix blue.

TiO2 P25 photocatalyst is used as a reference for the study of organic molecules photodegradation. The objective of this study was to investigate the ability of synthesized doped titanium dioxide nanoparticles to remove textile dyes, Methyl orange and Levafix blue dyes, from aqueous solutions by photocatalysis process. Doped titanium dioxide nanoparticles were successfully prepared by a modified sol–gel method. The results reveal that all the samples consist of crystalline anatase with mesoporous structures. Transmission electron microscope (TEM) confirmed that the photocatalysts were in nanometer size with a diameter of about 9 nm. X-ray diffraction (XRD) showed that the photocatalysts were predominantly in well-crystallized anatase phase; UV–Vis diffuse reflectance spectroscope (UV–Vis DRS) presents a shift absorption from the UV region into the visible-light region. Surface area analyzer was used to characterize the synthesized catalyst.      Synthesized powders were used for the degradation of methyl orange and levafix blue dyes in aqueous solution under visible light. It was found that doped TiO2 increases methyl orange and levafix blue photodegradation in comparison with TiO2 P25

Seed Priming with Salicylic Acid Alleviates Salt Stress Toxicity in Barley by Suppressing ROS Accumulation and Improving Antioxidant Defense Systems, Compared to Halo- and Gibberellin Priming

Plants are highly sensitive to various environmental stresses, which can hinder their growth and reduce yields. In this study, we investigated the potential of seed priming with salicylic acid (SA), gibberellic acid (GA3), and sodium chloride (NaCl) to mitigate the adverse effects of salinity stress in Hordeum vulgare at the germination and early seedling stages. Exposing H. vulgare seeds to salt stress reduced the final germination percentage and seedling shoot and root growth. Interestingly, all seed treatments significantly improved salt-induced responses, with GA3 being more effective in terms of germination performance, plant growth, and photosynthesis. SA priming exhibited promising effects on antioxidant defense mechanisms, proline, sugar, and ascorbic acid production. Notably, SA priming also suppressed reactive oxygen species accumulation and prevented lipid peroxidation. These findings highlight the ability of SA to manage crosstalk within the seed, coordinating many regulatory processes to support plant adaptation to salinity stress

SMART-1: Review of Lunar Highlights

International audienc

SMART-1 Lunar Highlights: Impact Craters, Basins, Tectonics and Volcanism

International audienc

SMART-1 Results and Targets for LRO

International audienc

SMART-1 Lunar Highlights: Impact Craters, Basins, Tectonics and Volcanism

International audienc

SMART-1 Lunar Highlights: Impact Craters, Basins, Tectonics and Volcanism

International audienc

SMART-1: Review of Lunar Highlights

International audienc