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Turki A Al-Turki, Carol C Baskin
Our purpose was to evaluate the usefulness of the germination vs. the X-ray test in determining the initial viability of seeds of eight wild species (Salvia spinosa, Salvia aegyptiaca, Ochradenus baccatus, Ochradenus arabicus, Suaeda aegyptiaca, Suaeda vermiculata, Prosopisfarcta and Panicumturgidum) from Saudi Arabia. Several days were required to determine viability of all eight species via germination tests, while immediate results on filled/viable seeds were obtained with the X-ray test. Seeds of all the species, except Sa...
May 2017: Saudi Journal of Biological Sciences
Weiqiang Li, Lam-Son Phan Tran
Halophyte plant species are those that can finish their life cycle in the presence of 50% or more seawater concentration. Ethylene, as a natural plant hormone produced at later stages of seed germination, plays an important role in regulating seed germination. However, its regulatory role in seed dormancy and germination of halophyte plants under salt stress is still not well understood. In this chapter, we describe methods used for applications of two ethylene donors, ethephon and 1-aminocyclopropane-1-carboxylic acid, in studies aimed at examining the effects of ethylene on seed germination of a representative halophyte plant Suaeda salsa under high salinity...
2017: Methods in Molecular Biology
Yuefen Li, Shuo Liang, Yiying Zhao, Wenbo Li, Yuejiao Wang
The grasslands of Western Jilin Province in China have experienced severe degradation during the last 50 years. Radial basis function neural networks (RBFNN) and support vector machines (SVM) were used to predict the carbon, nitrogen, and phosphorus contents of Leymus chinensis (L. chinensis) and explore the degree of grassland degradation using the matter-element extension model. Both RBFNN and SVM demonstrated good prediction accuracy. The results indicated that there was severe degradation, as samples were mainly concentrated in the 3rd and 4th levels...
May 1, 2017: Journal of Environmental Management
Changzi Ge, Renqing Wang, Yanchao Chai, Haiqing Wang, Manman Kan, Jian Liu
Suaeda salsa community is a vegetation type in saline-alkali areas. Weed invasion and colonization in S. salsa communities lead to fragmentationsof S. salsa communities. The colonization of invaded weeds in S. salsa communities is related to community succession of saline-alkali zones. The fragmented S. salsa community may be restored if the mechanism of invaded weed colonization in S. salsa communities is clearly elucidated. Thus, we studied the ecological stoichiometric characteristics of soils and plants in a salt marsh to explain the high colonization possibility of invaded weeds in S...
2017: PloS One
X Sun, Y Gao, D Wang, J Chen, F Zhang, J Zhou, X Yan, Y Li
Variation in soil salt may change the stoichiometry of a halophyte by altering plant ecophysiology, and exert different influences on various plant organs, which has potentially important consequences for the nutrition of consumers as well as nutrient cycling in a saline ecosystem. Using a greenhouse pot experiment, we investigated the effect of salinity variability on the growth and stoichiometry of different organs of Suaeda glauca and Salicornia europaea - two dominant species of important ecological and economic value in the saline ecosystem...
January 30, 2017: Plant Biology
Zhuoran Wang, Gengxing Zhao, Mingxiu Gao, Chunyan Chang
The objectives of this study were to explore the spatial variability of soil salinity in coastal saline soil at macro, meso and micro scales in the Yellow River delta, China. Soil electrical conductivities (ECs) were measured at 0-15, 15-30, 30-45 and 45-60 cm soil depths at 49 sampling sites during November 9 to 11, 2013. Soil salinity was converted from soil ECs based on laboratory analyses. Our results indicated that at the macro scale, soil salinity was high with strong variability in each soil layer, and the content increased and the variability weakened with increasing soil depth...
February 2017: Environmental Monitoring and Assessment
Jan H Behr, Alain Bouchereau, Solenne Berardocco, Charlotte E Seal, Timothy J Flowers, Christian Zörb
Background and Aims: Suaeda maritima is a halophyte commonly found on coastal wetlands in the intertidal zone. Due to its habitat S. maritima has evolved tolerance to high salt concentrations and hypoxic conditions in the soil caused by periodic flooding. In the present work, the adaptive mechanisms of S. maritima to salinity combined with hypoxia were investigated on a physiological and metabolic level. Methods: To compare the adaptive mechanisms to deficient, optimal and stressful salt concentrations, S...
April 1, 2017: Annals of Botany
Zhigao Sun, Xiaojie Mou, Dangyu Zhang, Wanlong Sun, Xingyun Hu, Liping Tian
Three one-off burial treatments were designed in intertidal zone of the Yellow River estuary to determine the effects of sediment burial on decomposition and heavy metal levels of Suaeda salsa. Sediment burial showed significant effect on decomposition rate of S. salsa. With increasing burial depth, Cu, Zn, Cd and Co levels generally increased, while Cr and Mn levels decreased. Except for Zn, Mn, Cd and Co, stocks of Pb, Cr, Cu, Ni and V in S. salsa among burials were greatly different. The S. salsa in three burials was particular efficient in binding V and Co and releasing Pb, Zn and Cd, and, with increasing burial depth, stocks of Cr, Cu, Ni and Mn shifted from accumulation to release...
March 15, 2017: Marine Pollution Bulletin
Long Jin, So-Ra Ko, Chang Soo Lee, Chi-Yong Ahn, Jung-Sook Lee, Keun Chul Lee, Hee-Mock Oh, Hyung-Gwan Lee
A polyphasic taxonomic study was carried out on strain EBR-4-2T isolated from a biofilm reactor in Korea. The cells of the strain were Gram-staining-positive, non-spore-forming, non-motile, and rod-shaped. Comparative 16S rRNA gene sequence studies showed a clear affiliation of this strain with Actinobacteria, which had the highest pairwise sequence similarities with Actinotalea suaedae EGI 60002T (98.7 %), Actinotalea ferrariae CF5-4T (96.3 %) and Actinotalea fermentans DSM 3133T (96.2 %). The phylogenetic analysis based on the 16S rRNA gene sequences showed that the strain formed a clear phylogenetic lineage with the genus Actinotalea...
December 30, 2016: International Journal of Systematic and Evolutionary Microbiology
Zhiming Yang, Yunbo Wang, Xia Yuan, Ling Wang, Deli Wang
We studied the effect of dietary roughage species and their combinations on forage intake and growth rate of ewes during winter in a pastoral-farming area of northeast China. Twenty-five Northeast crossbred ewes (fine-wool sheep × Small-tailed Han sheep) were randomly selected and divided into five groups (G1, G2, G3, G4 and G5). During a 30 day feeding trial, each group of ewes were offered the same basal diet (composed of 0.36 kg chopped maize stalk (10 mm), 0.14 kg corn meal, 0.05 kg soybean meal and 1...
December 7, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
Hayoung Cho, Moriyuki Hamada, Jae-Hyung Ahn, Hang-Yeon Weon, Jae-Ho Joa, Ken-Ichiro Suzuki, Soon-Wo Kwon, Soo-Jin Kim
A bacterial strain, designated 5GHs33-3T, was isolated from greenhouse soil collected from Yongin region, Gyeonggi province, South Korea. The strain was an aerobic, Gram-stain-positive, flagellated, rod-shaped bacterium. Strain 5GHs33-3T grew at 4-37 °C (optimally at 28-30 °C), pH 6.0-10.0 (optimally at pH 7.0) and with 0-7 % (w/v) NaCl (optimally with 0 %). The 16S rRNA gene sequence analysis revealed that strain 5GHs33-3T had high sequence similarity with Actinotalea suaedae EGI 60002T (98.4 %), Actinotalea ferrariae CF5-4T (96...
April 2017: International Journal of Systematic and Evolutionary Microbiology
Jong Woo Hyeon, Sang Eun Jeong, Kyunghwa Baek, Che Ok Jeon
A Gram-staining-negative, strictly aerobic bacterial strain, designated MA7-20T, was isolated from a marine alga, Porphyridium marinum, in Korea. Cells showing oxidase-positive and catalase-positive activities were motile rods with bipolar flagella. Growth of strain MA7-20T was observed at 15-45 C (optimum, 30-37 C), at pH 6.0-10.5 (optimum, pH 7.0-8.0) and in the presence of 0-7 % (w/v) NaCl (optimum, 2-3 %). Strain MA7-20T contained summed feature 8 (comprising C18:1 ω7c/C18:1 ω6c) and 11-methyl-C18:1 ω7c and C18:0 as the major fatty acids and ubiquinone-10 as the sole isoprenoid quinone...
November 2, 2016: International Journal of Systematic and Evolutionary Microbiology
Doongar R Chaudhary, Aditya P Rathore, Raghawendra Kumar, Bhavanath Jha
Microbial communities in intertidal coastal soils respond to a variety of environmental factors related to resources availability, habitat characteristics, and vegetation. These intertidal soils of India are dominated with Salicornia brachiata, Aeluropus lagopoides, and Suaeda maritima halophytes, which play a significant role in carbon sequestration, nutrient cycling, and improving microenvironment. However, the relative contribution of edaphic factors, halophytes, rhizosphere, and bulk sediments on microbial community composition is poorly understood in the intertidal sediments...
May 4, 2017: International Journal of Phytoremediation
Junhong Bai, Guangliang Zhang, Qingqing Zhao, Qiongqiong Lu, Jia Jia, Baoshan Cui, Xinhui Liu
This study was carried out in three kinds of salt marshes according to the vegetation covers, including Phragmites australis salt marsh (PSM), Suaeda salus salt marsh (SSM) and Tamarix chinensis-Suaeda salus salt marsh (TSSM). We applied allometric function, exponential function and logistic function to model the depth distribution of the SOCv and SOCc for each salt marsh, respectively. The results showed that the exponential function fits the depth distribution of the SOCv more well than other two functions...
October 6, 2016: Scientific Reports
Sachin Ashruba Gharat, Shaifaly Parmar, Subodh Tambat, Madavan Vasudevan, Birendra Prasad Shaw
Although salt tolerance is a feature representative of halophytes, most studies on this topic in plants have been conducted on glycophytes. Transcriptome profiles are also available for only a limited number of halophytes. Hence, the present study was conducted to understand the molecular basis of salt tolerance through the transcriptome profiling of the halophyte Suaeda maritima, which is an emerging plant model for research on salt tolerance. Illumina sequencing revealed 72,588 clustered transcripts, including 27,434 that were annotated using BLASTX...
2016: PloS One
Narendran Rajendran, Shankar Subramaniam, Mamilla R Charan Raja, Pemaiah Brindha, Santanu Kar Mahapatra, Aravind Sivasubramanian
The present study portrays the isolation of four phenylpropanoids - ferulic acid (FA), sinapic acid (SA), caffeic acid (CA), and chlorogenic acid (CHA) from the water extract of Suaeda maritima (L.) Dumort, a phytochemically less explored Indian medicinal plant. Further, synthesis and characterization of silver and gold nanoparticles using the isolated phenylpropanoids were done. The silver nanoparticles synthesized from S. maritima water extract along with silver nano-conjugated forms of the isolated compounds exhibited appreciable anti-leukemic activity against K562 cells (human myeloid leukemia)...
September 28, 2016: Artificial Cells, Nanomedicine, and Biotechnology
Fuhong He, Yinghua Pan, Lili Tan, Zhenhua Zhang, Peng Li, Jia Liu, Shuxin Ji, Zhaohua Qin, Hongbo Shao, Xueyan Song
One-dimensional soil column water infiltration and capillary adsorption water tests were conducted in the laboratory to study the water transportation characteristics of marsh saline soil in the Yellow River Delta, providing a theoretical basis for the improvement, utilization and conservation of marsh saline soil. The results indicated the following: (1) For soils with different vegetation covers, the cumulative infiltration capacity increased with the depth of the soil layers. The initial infiltration rate of soils covered by Suaeda and Tamarix chinensis increased with depth of the soil layers, but that of bare soil decreased with soil depth...
September 21, 2016: Science of the Total Environment
Haroun Chenchouni
This study aims to characterize soil properties and to investigate how these parameters, including soil salinity, are related to zonation and distributional patterns of halophytic plants occurring at edges of the Djendli Sabkha (northeastern Algeria). Soil samples were collected from four stations at Sabkha edges with seven samples for each station. Physicochemical soil parameters were analysed in each vegetation belt of halophytes. Relationships between soil traits were tested to determine spatial variation and their effects on vegetation cover of the principal halophyte species...
January 1, 2017: Science of the Total Environment
Xiaoli Liu, Xuejiao Shen, Yongkai Lai, Kang Ji, Hushan Sun, Yiyan Wang, Chengzong Hou, Ning Zou, Junli Wan, Junbao Yu
The long term (30 days) toxicological effects of environmentally relevant concentrations of Pb(2+) (20μg/L) and Zn(2+) (100μg/L) were characterized in Suaeda salsa using proteomics techniques. The responsive proteins were related to metabolism (Krebs cycle and Calvin cycle), protein biosynthesis, stress and defense, energy, signaling pathway and photosynthesis in Pb(2+), Zn(2+) and Pb(2+)+ Zn(2+) exposed groups in S. salsa after exposures for 30 days. The proteomic profiles also showed differential responses in S...
September 8, 2016: Ecotoxicology and Environmental Safety
Zhilin Yuan, Irina S Druzhinina, Jessy Labbé, Regina Redman, Yuan Qin, Russell Rodriguez, Chulong Zhang, Gerald A Tuskan, Fucheng Lin
Root microbiota is a crucial determinant of plant productivity and stress tolerance. Here, we hypothesize that the superior halo-tolerance of seepweed Suaeda salsa is tightly linked to a specialized belowground microbiome. To test this hypothesis, we performed a phylogenetic trait-based framework analysis based on bacterial 16S rRNA gene and fungal nuclear rRNA internal transcribed spacer profiling. Data showed that the dominant α-proteobacteria and γ-proteobacteria communities in bulk soil and root endosphere tend to be phylogenetically clustered and at the same time exhibit phylogenetic over-dispersion in rhizosphere...
2016: Scientific Reports
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