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Min Zong, Guang Xuan Han, Yun Zhao Li, Guang Zhen Wang, An Dong Wang, Xian Ji Yang
Soil and vegetation community were investigated using the method of kilometer grid sampling. In addition, using the maximum entropy (MaxEnt) and the GIS spatial analysis technique, the potential distribution of dominant species in the Yellow River Delta and their major environmental variables and ecological parameters were quantitatively analyzed. The results showed that the dominant species of the coastal wetland were Tamarix chinensis, Phragmites australis and Suaeda salsa in the Yellow River Delta. Among the environmental variables, six variables were significant contributors to the potential distribution model of T...
June 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Lijun Xi, Nenghu Qiao, Dejian Liu, Jing Li, Jingjing Zhang, Jianguo Liu
Two bacterial strains were isolated from coal mine water in China. Isolates were facultatively anaerobic, Gram-stain-negative, rod-shaped, motile by means of a single polar flagellum, and they did not produce bacteriochlorophyll α. Cells grew in tryptic soy broth with 0-5.5 % (w/v) NaCl, at 4-55 °C and pH 3.5-10.5. Isolates were positive for catalase, oxidase, urease, Voges-Proskauer test, gelatin hydrolysis and H2S production. Analysis of 16S rRNA gene sequences indicated that the closest relatives of strains Q4...
April 25, 2018: International Journal of Systematic and Evolutionary Microbiology
Huimin Duan, Yanchun Ma, Ranran Liu, Qiang Li, Yang Yang, Jie Song
Salinity and waterlogging are abiotic stresses that have a significant impact on agricultural production and ecosystem conservation. The response of euhalophyte Suaeda glauca to waterlogging and salinity stresses was investigated. The results revealed that waterlogging markedly decreased seedling emergence. Compared to drained conditions, waterlogging inhibited the shoot dry weight, net photosynthetic rate, stomatal conductance, maximal efficiency of PSII photochemistry and chlorophyll content at salinity. Salinity decreased these values in both waterlogged and drained conditions, while the opposite trend was found in intercellular CO2 concentrations...
March 28, 2018: Plant Physiology and Biochemistry: PPB
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
Rongxing Bian, Danhui Xin, Xiaoli Chai
Vegetation plays an important role in CH4 transport and oxidation in landfill cover soil. This study investigated CH4 emission fluxes in two landfills with different surface coverage conditions and it found that the CH4 emission fluxes presented spatial and temporal disparities. A significant discrepancy in CH4 emission flux between day and night in areas covered with Kochia sieversiana indicated that enhanced diffusion induced by rising temperature was the main mechanism for CH4 transport during daytime. A significant increase of CH4 emission flux after the K...
February 22, 2018: Environmental Technology
Zeineb Mzoughi, Amal Abdelhamid, Christophe Rihouey, Didier Le Cerf, Abderrahman Bouraoui, Hatem Majdoub
Box-Behnken design (BBD) was performed via ultrasound-assisted system to optimize extraction yield and total antioxidant ability of polysaccharides from Suaeda fruticosa. Three independent variables were studied: temperature, time and pH with optimal settings 90 °C, 37 min and 2.9, respectively. Under these settings, isolation yield and total antioxidant activity were 34.0% and 31.8 mg ascorbic acid equivalent/g material, respectively. Furthermore, preliminary structure study was carried out using UV-vis analysis, Fourier transform infrared spectroscopy (FT-IR) and Nuclear magnetic resonance (1D (1 H, 13 C NMR) and 2D (1 H, 1 H COSY, 1 H/13 C HSQC)) methods Size exclusion chromatography (SEC) determination revealed that polysaccharide extracted had an average molecular weight of 240 kDa...
April 1, 2018: Carbohydrate Polymers
Xin-Tong Zhou, Fang Wang, Yin-Ping Ma, Li-Jia Jia, Ning Liu, Hai-Yun Wang, Pan Zhao, Gui-Xian Xia, Nai-Qin Zhong
Accumulating evidence indicates that plant plastocyanin is involved in copper homeostasis, yet the physiological relevance remains elusive. In this study, we found that a plastocyanin gene (SsPETE2) from euhalophyte Suaeda salsa possessed a novel antioxidant function, which was associated with the copper-chelating activity of SsPETE2. In S. salsa, expression of SsPETE2 increased in response to oxidative stress and ectopic expression of SsPETE2 in Arabidopsis enhanced the antioxidant ability of the transgenic plants...
March 2018: Plant Science: An International Journal of Experimental Plant Biology
Qi-Zhi Wang, Ping Qiu, Fei Liu, Bi Wang, Fu-Qin Guan, Xu Feng, Shu Xu
A new isoflavane, suaeglaucin A (1), which was isolated from the herb of Suaeda glauca (Bunge) Bunge, was elucidated as 5,6,8-trimethoxy-7- hydroxycoumaronochromone based on its MS and 1D and 2D NMR spectroscopic data. The structure of compound 1 was confirmed by X-ray crystallographic analysis. Five known compounds (2-6) were also isolated. All compounds were isolated for the first time from Chenopodiaceae. We found that compounds 2 and 4 possessed moderate antioxidant activity.
December 20, 2017: Journal of Asian Natural Products Research
Fanzhu Qu, Ling Meng, Junbao Yu, Jingtao Liu, Jingkuan Sun, Hongjun Yang, Linshui Dong
Studies have indicated that consistent or well-constrained (relatively low variability) carbon:nitrogen:phosphorus (C:N:P) ratios exist in large-scale ecosystems, including both marine and terrestrial ecosystems. Little is known about the C, N and P stoichiometric ratios that exist in the soils and plants of Chenier Island in the Yellow River Delta (YRD). We examined the distribution patterns and relationships of C, N and P stoichiometry in the soils and plants of Chenier Island, as well as the potential influences of the island's micro-geomorphology...
2017: PloS One
Patrick J Moran, M Irene Wibawa, Lincoln Smith
Aceria salsolae (Acari: Eriophyidae) is being evaluated as a candidate biological control agent of Russian thistle (Salsola tragus, Chenopodiaceae), a major invasive weed of rangelands and dryland crops in the western USA. Prior laboratory host range testing under artificial lighting indicated reproduction on non-native Bassia hyssopifolia and on a native plant, Suaeda calceoliformis. However, in field tests in the native range, mite populations released on these 'nontarget' plants remained low. We hypothesized that UV-A light, which can affect behavior of tetranychid mites, would affect populations of the eriophyid A...
December 2017: Experimental & Applied Acarology
Donglai Li, Yu Liu, Xinghai Sun, Huw Lloyd, Shuyu Zhu, Shuyan Zhang, Dongmei Wan, Zhengwang Zhang
The Endangered Red-crowned Crane (Grus japonensis) is one of the most culturally iconic and sought-after species by wildlife tourists. Here we investigate how the presence of tourists influence the vigilance behaviour of cranes foraging in Suaeda salsa salt marshes and S. salsa/Phragmites australis mosaic habitat in the Yellow River Delta, China. We found that both the frequency and duration of crane vigilance significantly increased in the presence of wildlife tourists. Increased frequency in crane vigilance only occurred in the much taller S...
November 30, 2017: Scientific Reports
Sonam Yadav, Avinash Mishra, Bhavanath Jha
The C4 halophytic species Suaeda monoica and S. fruticosa, possess the C4 photosynthesis pathway without Kranz anatomy were grown at ambient (470ppm CO2 ) and elevated (850ppm CO2 ) atmospheric CO2 under control containment facility to study the plant response under CO2 stress condition. The relative growth of both Suaeda species was enhanced with atmospheric CO2 enrichment compared to control (ambient) condition. The photosynthesis rate was found 2.5μmolCO2 m-2 s-1 in both species under stress condition compared to about 1...
January 2018: Journal of Photochemistry and Photobiology. B, Biology
Mansour S Al-Said, Nasir A Siddiqui, Mohamed Ahmed Mukhair, Mohammad K Parvez, Perwez Alam, Mohd Ali, Anzarul Haque
Suaeda monoica Forssk. ex J.F. Gmel (Chenopodiaceae), a mangrove herb, is distributed in tropical Africa, Arabian Peninsula, India, Pakistan, Palestine and Jordan. The plant parts are used to treat sore throat, hepatitis, wounds, rheumatism, paralysis, asthma, snakebites, skin disease and ulcer. Two new phytoconstituents characterized as 13,17-octahydropentalene-4,4,10,23-tetramethyl-17,21-diisopropyl-tetradecahydrocyclo-[a]-phenanthrene-(14), 20(23), 21(30)-trien-5α-ol (SMC-3) and [1,4,4-trimethyl-cyclopent-1(5)-enyl]-9,10,17,21-tetramethyl-9α-ol-16α (17α)-epoxy heptadecan-6,10-dione (SMC-4) belong to the class norsesquaterpenol and monocyclic triterpenoid, respectively, along with two known compounds 3-epi-lupeol (SMC-1) and 4-cyclopentylpyrocatechol (SMC-2) have been isolated from the ethanol extract of aerial parts of S...
November 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
Dong Han Choi, Gwang Ii Jang, Alla Lapidus, Alex Copeland, T B K Reddy, Supratim Mukherjee, Marcel Huntemann, Neha Varghese, Natalia Ivanova, Manoj Pillay, Brian J Tindall, Markus Göker, Tanja Woyke, Hans-Peter Klenk, Nikos C Kyrpides, Byung Cheol Cho
The genus Marinobacterium belongs to the family Alteromonadaceae within the class Gammaproteobacteria and was reported in 1997. Currently the genus Marinobacterium contains 16 species. Marinobacterium rhizophilum CL-YJ9T was isolated from sediment associated with the roots of a plant growing in a tidal flat of Youngjong Island, Korea. The genome of the strain CL-YJ9T was sequenced through the Genomic Encyclopedia of Type Strains, Phase I: KMG project. Here we report the main features of the draft genome of the strain...
2017: Standards in Genomic Sciences
Lei Wang, Hong-Ling Wang, Lan Yin, Chang-Yan Tian
BACKGROUND: Dimorphic seeds from Suaeda aralocaspica exhibit different germination behaviors that are thought to be a bet-hedging strategy advantageous in harsh and unpredictable environments. To understand the molecular mechanisms of Suaeda aralocaspica dimorphic seed germination, we applied RNA sequencing and small RNA sequencing for samples collected at three germination stages. RESULTS: A total of 79,414 transcripts were assembled using Trinity, of which 57...
October 19, 2017: BMC Genomics
Doongar R Chaudhary, Jinhyun Kim, Hojeong Kang
Salt marshes are transitional zone between terrestrial and aquatic ecosystems, occupied mainly by halophytic vegetation which provides numerous ecological services to coastal ecosystem. Halophyte-associated microbial community plays an important role in the adaptation of plants to adverse condition and also affected habitat characteristics. To explore the relationship between halophytes and soil microbial community, we studied the soil enzyme activities, soil microbial community structure, and functional gene abundance in halophytes- (Carex scabrifolia, Phragmites australis, and Suaeda japonica) covered and un-vegetated (mud flat) soils at Suncheon Bay, South Korea...
October 6, 2017: Microbial Ecology
M W Gates, J Torrens, P Fidalgo, R R Kula, M L Buffington, D Adamski
We report on Asphondylia poss. swaedicola Kieffer & Jörgensen inducing apical stem galls on Suaeda divaricata Moquin-Tandon in the Monte region of Argentina. The putative inquiline gelechiid Scrobipalpula patagonica Povolný is confirmed as an associate of A. poss. swaedicola galls. The following hymenopteran parasitoids are associated with this system: Torymus nr swaedicola (Kieffer & Jörgensen), Aprostocetus sp., Horismenus sp., Bracon (Bracon) sp., Chelonus (Microchelonus) sp., Apanteles sp., Zaeucoila robusta (Ashmead), and Goniozus nigrifemur Ashmead...
October 2, 2017: Neotropical Entomology
Yange Xu, Yuanqin Zhao, Huimin Duan, Na Sui, Fang Yuan, Jie Song
BACKGROUND: Suaeda salsa (S. salsa) is a euhalophyte with high economic value. S. salsa can produce dimorphic seeds. Brown seeds are more salt tolerant, can germinate quickly and maintain the fitness of the species under high saline conditions. Black seeds are less salt tolerant, may become part of the seed bank and germinate when soil salinity is reduced. Previous reports have mainly focused on the ecophysiological traits of seed germination and production under saline conditions in this species...
September 13, 2017: BMC Genomics
Qiang He, Brian R Silliman, Baoshan Cui
Although salinity in many ecosystems such as salt marshes can be extremely high, an asymmetry in salinity range between experimental studies (relatively narrow) and field conditions (potentially broad) has strongly affected current understanding of plant salinity tolerance. To improve understanding, it is thus important to examine plant tolerances over a broad range of salinities and identify potential tolerance thresholds. We examine tolerances of two widely distributed marsh plants, Suaeda salsa and Salicornia europaea, to salinities ranging from 0 to 100 g/kg, and determine survival, above- and belowground biomass after 8 weeks of salinity treatment...
August 2017: Ecology and Evolution
Hong-Ling Wang, Chang-Yan Tian, Lei Wang
Cold stratification is a requirement for seed dormancy breaking in many species, and thus it is one of the important factors for the regulation of timing of germination. However, few studies have examined the influence of various environmental conditions during cold stratification on subsequent germination, and no study has compared such effects on the performance of dormant versus non-dormant seeds. Seeds of halophytes in the cold desert might experience different light and salinity conditions during and after cold stratification...
2017: PeerJ
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