keyword
MENU ▼
Read by QxMD icon Read
search

Soil

keyword
https://www.readbyqxmd.com/read/28445827/scale-effect-on-spatial-patterns-of-ecosystem-services-and-associations-among-them-in-semi-arid-area-a-case-study-in-ningxia-hui-autonomous-region-china
#1
Shuna Xu, Yanfang Liu, Xia Wang, Guangxia Zhang
Identifying scale effect on spatial patterns of ecosystem services and associations among them has been recognized as critical to the sustainable management of ecosystem services. We proposed a method to conveniently integrate ecosystem services of small scale into different larger scales. Taking Ningxia Hui Autonomous Region in west China as an example, we analyzed the change regularity of spatial patterns of 7 ecosystem services under 22 different scales. Further, the tradeoffs and synergies among ecosystem services across all scales were compared...
April 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28445825/physico-chemical-protection-rather-than-biochemical-composition-governs-the-responses-of-soil-organic-carbon-decomposition-to-nitrogen-addition-in-a-temperate-agroecosystem
#2
Wenbing Tan, Guoan Wang, Caihong Huang, Rutai Gao, Beidou Xi, Biao Zhu
The heterogeneous responses of soil organic carbon (SOC) decomposition in different soil fractions to nitrogen (N) addition remain elusive. In this study, turnover rates of SOC in different aggregate fractions were quantified based on changes in δ(13)C following the conversion of C3 to C4 vegetation in a temperate agroecosystem. The turnover of both total organic matter and specific organic compound classes within each aggregate fraction was inhibited by N addition. Moreover, the intensity of inhibition increases with decreasing aggregate size and increasing N addition level, but does not vary among chemical compound classes within each aggregate fraction...
April 22, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28445036/ag-nanoparticles-and-wheat-roots-a-complex-interplay
#3
Ana Elena Pradas Del Real, Vladimir Vidal, Marie Carriere, Hiram A Castillo-Michel, Clément Levard, Perrine Chaurand, Géraldine Sarret
Agricultural soils are major sinks of silver nanoparticles in the environment, and crops are directly exposed to these emerging contaminants. A clear picture of their chemical transformations, uptake and transport mechanisms, and phytotoxic impacts is still lacking. In this work, wheat plants were exposed to pristine metallic (Ag-NPs) and sulfidized (Ag2S-NPs) silver nanoparticles and ionic Ag. Data on Ag distribution and speciation, phytotoxicity markers and gene expression were studied. A multi-technique and multi-scale approach was applied combining innovating tools at both laboratory and synchrotron...
April 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28445000/vegetation-response-to-control-of-invasive-tamarix-in-southwestern-us-rivers-a-collaborative-study-including-416-sites
#4
Eduardo González, Anna A Sher, Robert M Anderson, Robin F Bay, Daniel W Bean, Gabriel J Bissonnete, Bérenger Bourgeois, David J Cooper, Kara Dohrenwend, Kim D Eichhorst, Hisham El Waer, Deborah K Kennard, Rebecca Harms-Weissinger, Annie L Henry, Lori J Makarick, Steven M Ostoja, Lindsay V Reynolds, W Wright Robinson, Patrick B Shafroth
Most studies assessing vegetation response following control of invasive Tamarix trees along southwestern U.S. rivers have been small in scale (e.g., river reach), or at a regional scale but with poor spatial-temporal replication, and most have not included testing the effects of a now widely-used biological control. We monitored plant composition following Tamarix control along hydrologic, soil and climatic gradients in 244 treated and 172 reference sites across six U.S. States. This represents the largest comprehensive assessment to date on the vegetation response to the four most common Tamarix control treatments...
April 26, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28444962/fine-scale-species-distribution-changes-in-a-mixed-oak-stand-over-two-successive-generations
#5
Laura Truffaut, Emilie Chancerel, Alexis Ducousso, Jean Luc Dupouey, Vincent Badeau, François Ehrenmann, Antoine Kremer
Large-scale tree distribution changes have received considerable attention but underlying demo-genetic mechanisms are less well documented. We used a diachronic approach to track species shifts in a mixed oak stand (Quercus petraea-Quercus robur) at a fine spatiotemporal scale. Species assignment was made using single nucleotide polymorphism (SNP) fingerprints employing clustering and parentage analysis. Mating patterns and reproductive success were assessed by parentage analysis. Plot-based inventories of soil parameters and sapling densities provided ecological and demographic information, respectively...
April 26, 2017: New Phytologist
https://www.readbyqxmd.com/read/28444605/recent-trends-of-modern-bacterial-insecticides-for-pest-control-practice-in-integrated-crop-management-system
#6
REVIEW
Pritam Chattopadhyay, Goutam Banerjee, Sayantan Mukherjee
Food security and safety are the major concern in ever expanding human population on the planet earth. Each and every year insect pests cause a serious damage in agricultural field that cost billions of dollars annually to farmers. The loss in term of productivity and high cost of chemical pesticides enhance the production cost. Irrespective use of chemical pesticides (such as Benzene hexachloride, Endosulfan, Aldicarb, and Fenobucarb) in agricultural field raised several types of environmental issues. Furthermore, continuous use of chemical pesticides creates a selective pressure which helps in emerging of resistance pest...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28444602/bioactive-guided-fractionation-of-diols-from-streptomyces-sp-msl
#7
Raja Hima Bindhu Madasu, Vijayalakshmi Muvva, Rajesh Kumar Munaganti, Kumar Reddy Dorigondla, Venkateswarlu Yenamandra
An actinomycete strain with a great potential to produce bioactive compounds isolated from a laterite soil was identified as Streptomyces sp. MSL based on 16S rDNA sequence analysis. Secondary metabolites produced by the strain in optimized nutrient broth were extracted and analyzed by chromatographic and spectroscopic techniques. Among the different fractions, four diols, viz., (1) (2R,3R)-2,3-Butanediol, (2) (2R,3S)-2,3-Butanediol, (3) 2,3-dimethyl-2,3-butanediol (Pinacol), and (4) (3R)-1,3-Butanediol exhibited good antimicrobial activity...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28444597/biodegradation-of-pyrene-and-benzo-a-pyrene-in-the-liquid-matrix-and-soil-by-a-newly-identified-raoultella-planticola-strain
#8
Lifeng Ping, Qian Guo, Xiaoyang Chen, Xiaoli Yuan, Chunrong Zhang, Hua Zhao
In the current study, the PL7 strain was isolated from soil and identified as Raoultella planticola based on its physiological characteristics and 16S rDNA sequence. By the 10th day, the PL7 strain degraded 52.0% of the pyrene (PYR) content and 50.8% of the benzo[a]pyrene (BaP) content in 20 mg L(-1) PYR and 10 mg L(-1) BaP in the liquid matrix. The half-life of PYR and BaP by PL7 degradation was 8.59 and 9.46 days, respectively. At pH 8.0, the degradation rates of PYR and BaP by PL7 were significantly higher at 30 °C than at 20 and 40 °C...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28444594/bio-transformation-and-stabilization-of-arsenic-as-in-contaminated-soil-using-arsenic-oxidizing-bacteria-and-fecl3-amendment
#9
Santosh Kumar Karn, Xiangliang Pan, Ian R Jenkinson
A combination of biological and chemical methods was applied in the present study to evaluate the removal of arsenic (As) from contaminated soil. The treatment involved As-oxidizing microbes aimed of transforming the more toxic As (III) to less toxic As (V) in the soil. FeCl3 was added at three different concentrations (1, 2, and 3%) to stabilize the As (V). Leaching of the treated soil was investigated by making a soil column and passing tap water through it to determine solubility. Experimental results indicated that the bacterial activity had a pronounced positive effect on the transformation of As, and decreased the soluble exchangeable fraction from 50 to 0...
May 2017: 3 Biotech
https://www.readbyqxmd.com/read/28444568/effect-of-phosphorus-addition-on-the-reductive-transformation-of-pentachlorophenol-pcp-and-iron-reduction-with-microorganism-involvement
#10
Yongkui Wang, Xianli Liu, Jiexun Huang, Wensheng Xiao, Jiaquan Zhang, Chunqin Yin
The transformation of phosphorus added to the soil environment has been proven to be influenced by the Fe biochemical process, which thereby may affect the transformation of organic chlorinated contaminants. However, the amount of related literatures regarding this topic is limited. This study aimed to determine the effects of phosphorus addition on pentachlorophenol (PCP) anaerobic transformation, iron reduction, and paddy soil microbial community structure. Results showed that the transformation of phosphorus, iron, and PCP were closely related to the microorganisms...
April 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28444566/improvement-of-rice-seedling-growth-and-nitrogen-use-efficiency-by-seed-inoculation-with-endophytic-denitrifiers
#11
Wenfeng Wang, Yanyan Zhai, Lixiang Cao, Hongming Tan, Renduo Zhang
The aim of the present study is to investigate the effect of seed inoculation with endophytic denitrifiers on rice seedling growth and nitrogen use efficiency under low- and high-urea conditions. Pseudomonas sp. B2, Streptomyces sp. A9, and Fusarium sp. F3 were isolated from rice plant tissues. Rice seeds inoculated with the denitrifiers were sown in soil fertilized with 100 and 300 mg/kg urea concentrations, respectively. The denitrifiers increased soil ammonia concentrations or kept high ammonia concentration for a longer time in soils...
April 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28444520/elevational-plant-species-richness-patterns-and-their-drivers-across-non-endemics-endemics-and-growth-forms-in-the-eastern-himalaya
#12
Kumar Manish, Maharaj K Pandit, Yasmeen Telwala, Dinesh C Nautiyal, Lian Pin Koh, Sudha Tiwari
Despite decades of research, ecologists continue to debate how spatial patterns of species richness arise across elevational gradients on the Earth. The equivocal results of these studies could emanate from variations in study design, sampling effort and data analysis. In this study, we demonstrate that the richness patterns of 2,781 (2,197 non-endemic and 584 endemic) angiosperm species along an elevational gradient of 300-5,300 m in the Eastern Himalaya are hump-shaped, spatial scale of extent (the proportion of elevational gradient studied) dependent and growth form specific...
April 25, 2017: Journal of Plant Research
https://www.readbyqxmd.com/read/28444474/compost-and-sulfur-affect-the-mobilization-and-phyto-availability-of-cd-and-ni-to-sorghum-and-barnyard-grass-in-a-spiked-fluvial-soil
#13
Sabry M Shaheen, Ali A Balbaa, Alaa M Khatab, Jörg Rinklebe
Soil reclamation via additives can cause contradictory effects on the mobilization of toxic elements in soils under dry and wet conditions. Therefore, our aim was to investigate the impact of compost and sulfur in two rates (1.25 and 2.5%) on fractionation, mobilization, and phyto-availability of cadmium (Cd) and nickel (Ni) to sorghum (dry soil) and barnyard grass (wet soil) in a fluvial soil spiked with 25 mg Cd or 200 mg Ni/kg soil. Compost decreased the solubility and mobilization of Cd (especially in dry soil) and Ni (in both soils)...
April 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28444473/contrasting-effects-of-engineered-carbon-nanotubes-on-plants-a-review
#14
Meththika Vithanage, Mihiri Seneviratne, Mahtab Ahmad, Binoy Sarkar, Yong Sik Ok
Rapid surge of interest for carbon nanotube (CNT) in the last decade has made it an imperative member of nanomaterial family. Because of the distinctive physicochemical properties, CNTs are widely used in a number of scientific applications including plant sciences. This review mainly describes the role of CNT in plant sciences. Contradictory effects of CNT on plants physiology are reported. CNT can act as plant growth inducer causing enhanced plant dry biomass and root/shoot lengths. At the same time, CNT can cause negative effects on plants by forming reactive oxygen species in plant tissues, consequently leading to cell death...
April 25, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28444356/long-term-effects-of-drought-on-tree-ring-growth-and-carbon-isotope-variability-in-scots-pine-in-a-dry-environment
#15
Galina Timofeeva, Kerstin Treydte, Harald Bugmann, Andreas Rigling, Marcus Schaub, Rolf Siegwolf, Matthias Saurer
Drought frequency is increasing in many parts of the world and may enhance tree decline and mortality. The underlying physiological mechanisms are poorly understood, however, particularly regarding chronic effects of long-term drought and the response to increasing temperature and vapor pressure deficit (VPD). We combined analyses of radial growth and stable carbon isotope ratios (δ13C) in tree rings in a mature Scots pine (Pinus sylvestris L.) forest over the 20th century to elucidate causes of tree mortality in one of the driest parts of the European Alps (Pfynwald, Switzerland)...
April 21, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28443660/assessing-the-risk-of-engineered-nanomaterials-in-the-environment-development-and-application-of-the-nanofate-model
#16
Kendra L Garner, Sangwon Suh, Arturo A Keller
We developed a dynamic multimedia fate and transport model (nanoFate) to predict the time-dependent accumulation of metallic engineered nanomaterials (ENMs) across environmental media. nanoFate considers a wider range of processes and environmental sub-compartments than most previous models and considers ENM releases to compartments (e.g. urban, agriculture) in a manner that reflects their different patterns of use and disposal. As an example, we simulated ten years of release of nano CeO2, CuO, TiO2, and ZnO in the San Francisco Bay area...
April 26, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28443129/maximum-plant-uptakes-for-water-nutrients-and-oxygen-are-not-always-met-by-irrigation-rate-and-distribution-in-water-based-cultivation-systems
#17
Chris Blok, Brian E Jackson, Xianfeng Guo, Pieter H B de Visser, Leo F M Marcelis
Growing on rooting media other than soils in situ -i.e., substrate-based growing- allows for higher yields than soil-based growing as transport rates of water, nutrients, and oxygen in substrate surpass those in soil. Possibly water-based growing allows for even higher yields as transport rates of water and nutrients in water surpass those in substrate, even though the transport of oxygen may be more complex. Transport rates can only limit growth when they are below a rate corresponding to maximum plant uptake...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28443117/seed-biology-updates-highlights-and-new-discoveries-in-seed-dormancy-and-germination-research
#18
REVIEW
Hiroyuki Nonogaki
An understanding of the biology of seeds has been greatly advanced in recent years. The progresses, particularly in the field of seed dormancy and germination research, have been made at a remarkable speed. Some of the possible epigenetic mechanisms, including an involvement of non-coding RNA, which were predicted for DELAY OF GERMINATION1 just a few years ago, have now been demonstrated with strong molecular and genetic evidence. Imprinting, or parent-of-origin-specific gene silencing/expression, which was characterized particularly for developing seeds, was also found in imbibed seeds and suggested for dormancy mechanisms...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28443111/subcellular-compartmentalization-and-chemical-forms-of-lead-participate-in-lead-tolerance-of-robinia-pseudoacacia-l-with-funneliformis-mosseae
#19
Li Huang, Haoqiang Zhang, Yingying Song, Yurong Yang, Hui Chen, Ming Tang
The effect of arbuscular mycorrhizal fungus on the subcellular compartmentalization and chemical forms of lead (Pb) in Pb tolerance plants was assessed in a pot experiment in greenhouse conditions. We measured root colonization, plant growth, photosynthesis, subcellular compartmentalization and chemical forms of Pb in black locust (Robinia pseudoacacia L.) seedlings inoculated with Funneliformis mosseae isolate (BGC XJ01A) under a range of Pb treatments (0, 90, 900, and 3000 mg Pb kg(-1) soil). The majority of Pb was retained in the roots of R...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28443109/novel-alleles-of-phosphorus-starvation-tolerance-1-gene-pstol1-from-oryza-rufipogon-confers-high-phosphorus-uptake-efficiency
#20
Kumari Neelam, Shiwali Thakur, Neha, Inderjit S Yadav, Kishor Kumar, Salwinder S Dhaliwal, Kuldeep Singh
Limited phosphorus availability in the soil is one of the major constraints to the growth and productivity of rice across Asian, African and South American countries, where 50% of the rice is grown under rain-fed systems on poor and problematic soils. With an aim to determine novel alleles for enhanced phosphorus uptake efficiency in wild species germplasm of rice Oryza rufipogon, we investigated phosphorus uptake1 (Pup1) locus with 11 previously reported SSR markers and sequence characterized the phosphorus-starvation tolerance 1 (PSTOL1) gene...
2017: Frontiers in Plant Science
keyword
keyword
2630
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"