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Catarina Guerreiro Pereira, Luísa Barreira, Sebastiaan Bijttebier, Luc Pieters, Cátia Marques, Tamára F Santos, Maria João Rodrigues, João Varela, Luísa Custódio
This work explored the biotechnological potential of the medicinal halophyte Artemisia campestris subsp. maritima (dune wormwood) as a source of health promoting commodities. For that purpose, infusions, decoctions and tinctures were prepared from roots and aerial-organs and evaluated for in vitro antioxidant, anti-diabetic and tyrosinase-inhibitory potential, and also for polyphenolic and mineral contents and toxicity. The dune wormwood extracts had high polyphenolic content and several phenolics were identified by ultra-high performance liquid chromatography-photodiode array-mass-spectrometry (UHPLC-PDA-MS)...
March 16, 2018: Scientific Reports
Shuai Zhao, Jun-Jie Liu, Samiran Banerjee, Na Zhou, Zhen-Yong Zhao, Ke Zhang, Chang-Yan Tian
While saline soils account for 6.5% of the total land area globally, it comprises about 70% of the area in northwestern China. Microbiota in these saline soils are particularly important because they are critical to maintaining ecosystem services. However, little is known about the microbial diversity and community composition in saline soils. To investigate the distribution patterns and edaphic determinants of bacterial communities in saline soils, we collected soil samples across the hypersaline Ebinur Lake shoreline in northwestern China and assessed soil bacterial communities using bar-coded pyrosequencing...
March 14, 2018: Scientific Reports
Huaibin Wei, Huibin Yu, Hongwei Pan, Hongjie Gao
UV-visible absorption spectroscopy combined with principal component analysis (PCA) and two-dimensional correlation (2D correlation) is used to trace components of dissolved organic matter (DOM) extracted from soils in a larger estuarine delta and to investigate spatial variations of DOM fractions. Soil samples of different depths were collected from native halophyte soils along a saline gradient, i.e., Suaeda salsa Comm. (SSC), Chenopodium album Comm. (CAC), Phragmites australis Comm. (PAC), and Artemisia selengensis Comm...
March 9, 2018: Environmental Science and Pollution Research International
Hassan Etesami, Gwyn A Beattie
Salinity stress is one of the major abiotic stresses limiting crop production in arid and semi-arid regions. Interest is increasing in the application of PGPRs (plant growth promoting rhizobacteria) to ameliorate stresses such as salinity stress in crop production. The identification of salt-tolerant, or halophilic, PGPRs has the potential to promote saline soil-based agriculture. Halophytes are a useful reservoir of halotolerant bacteria with plant growth-promoting capabilities. Here, we review recent studies on the use of halophilic PGPRs to stimulate plant growth and increase the tolerance of non-halophytic crops to salinity...
2018: Frontiers in Microbiology
S A Petropoulos, A Karkanis, N Martins, I C F R Ferreira
Wild native species are usually grown under severe and stressful conditions, while a special category includes halophytic species that are tolerant to high salinity levels. Native halophytes are valuable sources of bioactive molecules whose content is higher in saline than normal conditions, since the adaptation to salinity mechanisms involve apart from changes in physiological functions the biosynthesis of protectant molecules. These compounds include secondary metabolites with several beneficial health effects which have been known since ancient times and used for medicinal purposes...
February 15, 2018: Food and Chemical Toxicology
Walid Ben-Romdhane, Rania Ben-Saad, Donaldo Meynard, Nabil Zouari, Ali Mahjoub, Lotfi Fki, Emmanuel Guiderdoni, Abdullah Al-Doss, Afif Hassairi
Herein, we report isolation of the AlTMP2 gene from the halophytic C4 grass Aeluropus littoralis. The subcellular localization suggested that AlTMP2 is a plasma membrane protein. In A. littoralis exposed to salt and osmotic stresses, the AlTMP2 gene was induced early and at a high rate, but was upregulated relatively later in response to abscisic acid and cold treatments. Expression of AlTMP2 in tobacco conferred improved tolerance against salinity, osmotic, H 2 O 2 , heat, and freezing stresses at the germination and seedling stages...
February 15, 2018: Protoplasma
Fehmida Bibi, Gary A Strobel, Muhammad I Naseer, Muhammad Yasir, Ahmed A Khalaf Al-Ghamdi, Esam I Azhar
Halophytes are associated with the intertidal forest ecosystem of Saudi Arabia and seemingly have an immense potential for yielding useful and important natural products. In this study we have aimed to isolate and characterize the endophytic and rhizospheric bacterial communities from the halophyte, Salsola imbricata , In addition these bacterial strains were identified and selected strains were further studied for bioactive secondary metabolites. At least 168 rhizspheric and endophytic bacteria were isolated and of these 22 were active antagonists against the oomycetous fungal plant pathogens, Phytophthora capsici and Pythium ultimum ...
2018: Frontiers in Microbiology
Bradley P Degens, Rick Krassoi, Lynette Galvin, Brad Reynolds, Tina Micevska
Measurements of potential acidity in water are used to manage aquatic toxicity risks of discharge from acid sulfate soils or acid mine drainage. Net acidity calculated from pH, dissolved metals and alkalinity is a common measurement of potential acidity but the relevance of current risk thresholds to aquatic organisms are unclear. Aquatic toxicity testing was carried out using four halophytic organisms with water from four saline sources in southern Western Australia (3 acidic drains and one alkaline river; 39-40 g TDS/L) where acidity was varied by adjusting pH to 4...
February 3, 2018: Chemosphere
Gokhan Zengin, Zaahira Aumeeruddy-Elalfi, Adriano Mollica, Mustafa Abdullah Yilmaz, Mohamad Fawzi Mahomoodally
BACKGROUND: Halophytes are considered as valuable sources of traditional drugs in different countries. PURPOSE: The present study aimed to evaluate biological and chemical fingerprints of three halophytes (Arthrocnemum macrostachyum (Moric.) C, Koch, Halimione portulacoides (L.) Aellen and Salicornia europaea L.). MATERIALS AND METHODS: The antioxidant and enzymatic inhibitory potential (acetylcholinesterase, butyrylcholinesterase, α-amylase, α-glucosidase, and tyrosinase) were assessed...
January 1, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
Chunsun Gu, Sheng Xu, Zhiquan Wang, Liangqin Liu, Yongxia Zhang, Yanming Deng, Suzhen Huang
As a halophyte, Iris lactea var. chinensis (I. lactea var. chinensis) is widely distributed and has good drought and heavy metal resistance. Moreover, it is an excellent ornamental plant. I. lactea var. chinensis has extensive application prospects owing to the global impacts of salinization. To better understand its molecular mechanism involved in salt resistance, the de novo sequencing, assembly, and analysis of I. lactea var. chinensis roots' transcriptome in response to salt-stress conditions was performed...
January 27, 2018: Plant Physiology and Biochemistry: PPB
Udit Sharma, Vinod Kataria, N S Shekhawat
Tamarix aphylla (L.) Karst., a drought resistant halophyte tree, is an agroforestry species which can be used for reclamation of waterlogged saline and marginal lands. Due to very low seed viability and unsuitable conditions for seed germination, the tree is becoming rare in Indian Thar desert. Present study concerns the evaluation of aeroponics technique for vegetative propagation of T. aphylla. Effect of various exogenous auxins (indole-3-acetic acid, indole-3-butyric acid, naphthalene acetic acid) at different concentrations (0...
February 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
Weiyun Chai, Lu Chen, Xiao-Yuan Lian, Zhizhen Zhang
Tripolinolate A as a new bioactive phenolic ester was previously isolated from a halophyte of Tripolium pannonicum. However, the in vitro and in vivo anti-glioma effects and mechanism of tripolinolate A have not been investigated. This study has demonstrated that (1) tripolinolate A inhibited the proliferation of different glioma cells with IC50 values of 7.97 to 14.02 µM and had a significant inhibitory effect on the glioma growth in U87MG xenograft nude mice, (2) tripolinolate A induced apoptosis in glioma cells by downregulating the expressions of antiapoptotic proteins and arrested glioma cell cycle at the G2/M phase by reducing the expression levels of cell cycle regulators, and (3) tripolinolate A also remarkably reduced the expression levels of several glioma metabolic enzymes and transcription factors...
January 25, 2018: Planta Medica
Bernardo Duarte, Ana Rita Matos, João Carlos Marques, Isabel Caçador
Spartina patens is a highly dispersed halophytic grass invader in Mediterranean marshes. It is also characterized by having a high degree of resistance to salinity, one of the main drivers of plant zonation in salt marshes. Nevertheless, the physiological basis behind the extreme resistance of S. patens requires more detailed studies. In the present work, we aimed to study how membrane fatty acid remodeling could contribute to the resistance of this plant to salt. Spartina patens individuals exposed to increasing levels of salinity and its leaf fatty acid profile under lipid peroxidation products evaluated under all tested concentrations...
January 12, 2018: Plant Physiology and Biochemistry: PPB
K Paredes-Páliz, R Rodríguez-Vázquez, B Duarte, M A Caviedes, E Mateos-Naranjo, S Redondo-Gómez, Isabel Caçador, Ignacio D Rodríguez-Llorente, E Pajuelo
Pollution of coasts by toxic metals and metalloids is a worldwide problem for which phytoremediation using halophytes and associated microbiomes is getting relevance. Metal(loid)s excess is a constraint for plant establishment and development, and plant growth promoting rhizobacteria (PGPR) mitigate plant stress under these conditions. However, mechanisms underlying this effect remain elusive. In this paper, the effect of toxic metal(loid)s on the activity of ROS-scavenging enzymes in roots of the halophyte Spartina densiflora grown on real polluted sediments in a green house experiment, was investigated...
January 19, 2018: Plant Biology
Salma Mukhtar, Ayesha Ishaq, Sara Hassan, Samina Mehnaz, Muhammad S Mirza, Kauser A Malik
Halophyte microbiome contributes significantly to plant performance and can provide information regarding complex ecological processes involved in osmoregulation of these plants. The objective of this study is to investigate the microbiomes associated with belowground (rhizosphere), internal (endosphere) and aboveground (phyllosphere) tissues of halophyte (Salsola stocksii) through metagenomics approach. Plant samples were collected from Khewra Salt Mines. The metagenomic DNA from soil, root and shoot samples was isolated with the help of FastDNA spin kit...
September 27, 2017: Polish Journal of Microbiology
Joseph K Sagers, Blair L Waldron, Joseph Earl Creech, Ivan W Mott, Bruce Bugbee
Halogeton (Halogeton glomeratus) is an invasive species that displaces Gardner's saltbush (Atriplex gardneri) on saline rangelands, whereas, forage kochia (Bassia prostrata) potentially can rehabilitate these ecosystems. Salinity tolerance has been hypothesized as the predominant factor affecting frequency of these species. This study compared relative salinity tolerance of these species, and tall wheatgrass (Thinopyrum ponticum) and alfalfa (Medicago sativa). Plants were evaluated in hydroponics, eliminating the confounding effects of drought, for 28 days at 0, 150, 200, 300, 400, 600, and 800 mmol/L NaCl...
December 2017: Ecology and Evolution
Yongliang Liu, Yanli Song, Shaohua Zeng, Barunava Patra, Ling Yuan, Ying Wang
As compatible solute, glycine betaine (GB) plays a significant role in salinity tolerance in GB accumulating plants. Solanaceous crops such as tomato (Solanum lycopersicum) and tobacco (Nicotiana tabacum) are salt sensitive and naturally GB non-accumulators. In Solanaceae, only the Lycium genus was recorded as halophytes in China, and several Lycium species have been reported as GB accumulators. The last biosynthetic step of GB is catalyzed by aminoaldehyde dehydrogenase (AMADH) with betaine aldehyde dehydrogenase (BADH) activities...
January 3, 2018: Physiologia Plantarum
Hui-Juan Gao, Xin-Pei Lü, Ling Zhang, Yan Qiao, Qi Zhao, Yong-Ping Wang, Meng-Fei Li, Jin-Lin Zhang
Haloxylon ammodendron, a perennial xero-halophyte, is an essential species for investigating the effects of drought on desert tree. To gain a comprehensive knowledge on the responses of H. ammodendron to drought stress, we specially performed the molecular and physiological analysis of H. ammodendron in response to -0.75 MPa osmotic stress for six and 24 h in lab condition via RNA-seq and digital gene expression (DGE). In total, 87,109 unigenes with a mean length of 680 bp and 13,486 potential simple sequence repeats (SSRs) were generated, and 3353 differentially expressed genes (DEGs) in shoots and 4564 in roots were identified under stress...
December 29, 2017: International Journal of Molecular Sciences
Shuang Sun, Jun Zhou
Environmental stresses are ubiquitous and unavoidable to all living things. Organisms respond and adapt to stresses through defined regulatory mechanisms that drive changes in gene expression, organismal morphology, or physiology. Immune responses illustrate adaptation to bacterial and viral biotic stresses in animals. Dysregulation of the genotoxic stress response system is frequently associated with various types of human cancer. With respect to plants, especially halophytes, complicated systems have been developed to allow for plant growth in high salt environments...
December 26, 2017: Thoracic Cancer
Juncheng Wang, Lirong Yao, Baochun Li, Yaxiong Meng, Xiaole Ma, Huajun Wang
No abstract text is available yet for this article.
2017: Frontiers in Genetics
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