Effect of salinity on Seed Germination and Growth of Tomato Seedlings (Lycopersicon esculentum)

This study was conducted in a private orchard during growing season 2009 to investigate the effects of NaCl application on growth of Tomato (Lycopersicon esculentum). The Saline water used was prepared in Six concentrations namely (0, 1000, 2000, 3000 ,4000 and 5000 ppm) .This study was evaluated in Two steps, seed germination and plant growth. The result showed that salinity caused a delay in seed germination and reduce the number of germinated seeds .At higher NaCl concentration(5000 ppm) , No seed germination was observed. Chlorophyll content & leaf area decreased with increasing salinity. The plant height decreased with increasing salinity. plant fresh and dry shoot and root weights were decreased with increasing salinity. Increasing salinity levels in the water significantly decreased the content of N,K in leaves, and non decreased of P, and increased the content of Na

Effect of salinity on Seed Germination and Growth of Tomato Seedlings (Lycopersicon esculentum)

This study was conducted in a private orchard during growing season 2009 to investigate the effects of NaCl application on growth of Tomato (Lycopersicon esculentum). The Saline water used was prepared in Six concentrations namely (0, 1000, 2000, 3000 ,4000 and 5000 ppm) .This study was evaluated in Two steps, seed germination and plant growth. The result showed that salinity caused a delay in seed germination and reduce the number of germinated seeds .At higher NaCl concentration(5000 ppm) , No seed germination was observed. Chlorophyll content & leaf area decreased with increasing salinity. The plant height decreased with increasing salinity. plant fresh and dry shoot and root weights were decreased with increasing salinity. Increasing salinity levels in the water significantly decreased the content of N,K in leaves, and non decreased of P, and increased the content of Na

Oxidative responses and genetic stability of date palm Phoenix dactylifera L. Barhi cv. under salinity stress.

This study was aimed to investigate the oxidative responses and genetic stability of date palm Phoenix dactylifera L. under different irrigation water salinity, date palm off shoots cv. Barhi subjected to different concentrations of NaCl (100, 200, 300 and 400 µM) for 180 days. The obtained results showed that, the date palm responses to salinity stress, this responses was increased of H2O2 level, Peroxidase activity and Malondialdehyde MDA concentration with increase NaCl concentration, while opposite trend with membrane stability index, which H2O2 was increased from(0.73 µM/g) in control to (2.20 µM/g) in 400 µM treatment, MDA was increased from (2.35 nmole/g) in control to (nmole/g) in 400 µM treatment, also peroxidase activity was reached to (39.59 U/min/g) in 400 µM treatment, while was (20.73 U/min/g) in control and Membrane stability index reduction significantly from (81.36%) in control to (64.13%) in 400 µM treatment.  In terms of genetic stability of date palm under salinity stress, the ISSR markers analysis showed that, the high concentrations of NaCl (200, 300 and 400 µM) produced more polymorphic fragments comparison to control treatment, while the DNA profile was identical between control and 100 µMtreatment.Dendogram was generated using similarity indices of ISSR markers showed, the lowest genetic similarity was found between 400 µM NaCl concentration and control and 100 µM treatment, followed with both 200 and 300 µM treatments, which the control and 100 µM treatment was grouped in one cluster, also treatments with 200 and 300 µM grouped in one cluster, while the treatment with 400 µM NaCl separated in cluster. Keywords: ISSR, Genetic stability, Oxidative stress, Peroxidase, MDA, membrane peroxidatio

HEPATOPROTECTIVE AND NEPHROPROTECTIVE EFFECTS OF THE AQUEOUS EXTRACT OF TURMERIC (CURCUMA LONGA) IN RIFAMPICIN AND ISONIAZID-INDUCED HEPATOTOXICITY AND NEPHROTOXICITY IN RATS

Objectives: The present study was designed to estimate the influences of oral administration of aqueous extract of turmeric (Curcuma longa) in hepatotoxicity and nephrotoxicity induced in rats by isoniazid and rifampicin (RIF) for 4 weeks. Influences were determined through the estimation of liver and kidney functions and histopathological changes. Materials and Methods: A total of 48 male albino rats were randomly divided into six groups: Normal control, INH+RIF treated rats, Turmeric aqueous extract 100 mg/kg treated rats, Turmeric aqueous extract 100 mg/kg + INH and RIF treated rats, Turmeric aqueous extract 200 mg/kg treated rats, Turmeric aqueous extract 200 mg/kg+ INH and RIF treated rats. Turmeric aqueous extract and INH + RIF (50 mg/kg bwpo, daily) were given for 4 weeks. Liver and kidney function markers (aspartate transaminase [AST], alanine transaminase [ALT], alanine phosphatase [ALP], bilirubin, blood urea, and creatinine) were determined enzymatically. In addition, tissues of liver and kidney were quickly separated and fixed in 10% formalin and subjected to histopathological studies. Statistical analysis was carried out using t-test. Results: The aqueous extract of turmeric (at a dose of 100 and 200 mg/kg bw, p.o. daily ) showed hepato- and reno-protective effects in hepato- and reno- toxicity induced by RIF and INH in rats. Significant elevation of serum ALT, AST, ALP, total bilirubin, creatinine, urea, and total protein, due to RIF and INH treatment, were significantly decreased. The histopathological study further confirmed the biochemical results. Conclusion: Results of the present study indicated that turmeric has hepatoprotective and renoprotective action against RIF- and INH-induced hepatic and renal injury in rats

The activation trajectory of plasmacytoid dendritic cells in vivo during a viral infection

International audiencePlasmacytoid dendritic cells (pDCs) are a major source of type I interferon (IFN-I). What other functions pDCs exert in vivo during viral infections is controversial, and more studies are needed to understand their orchestration. In the present study, we characterize in depth and link pDC activation states in animals infected by mouse cytomegalovirus by combining Ifnb1 reporter mice with flow cytometry, single-cell RNA sequencing, confocal microscopy and a cognate CD4 T cell activation assay. We show that IFN-I production and T cell activation were performed by the same pDC, but these occurred sequentially in time and in different micro-anatomical locations. In addition, we show that pDC commitment to IFN-I production was marked early on by their downregulation of leukemia inhibitory factor receptor and was promoted by cell-intrinsic tumor necrosis factor signaling. We propose a new model for how individual pDCs are endowed to exert different functions in vivo during a viral infection, in a manner tightly orchestrated in time and space

Abstracts of 1st International Conference on Computational & Applied Physics

This book contains the abstracts of the papers presented at the International Conference on Computational & Applied Physics (ICCAP’2021) Organized by the Surfaces, Interfaces and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria, held on 26–28 September 2021. The Conference had a variety of Plenary Lectures, Oral sessions, and E-Poster Presentations. Conference Title: 1st International Conference on Computational & Applied PhysicsConference Acronym: ICCAP’2021Conference Date: 26–28 September 2021Conference Location: Online (Virtual Conference)Conference Organizer: Surfaces, Interfaces, and Thin Films Laboratory (LASICOM), Department of Physics, Faculty of Science, University Saad Dahleb Blida 1, Algeria