Image
WTS Database
The subject of interest is:
waterpipe, water-pipe, nargile, narghile, arguileh, arguile, shisha, sheesha, chichi, hubble bubble, hubbly bubbly, goza, hookah, bong
| Title | Pub Year | Author Sort descending | SearchLink |
|---|---|---|---|
| Graphic Health Warnings on Cigarette Packs: How Long Before the Effects on Adolescents Wear Out? | 2015 | Centre for Behavioural Research in Cancer, Cancer Council Victoria, Melbourne, Australia vicki.white@cancervic.org.au.; Centre for Behavioural Research in Cancer, Cancer Council Victoria, Melbourne, Australia.; Centre for Behavioural Research in Cancer, C | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco
Periodical, Abbrev.
Nicotine Tob.Res.
Pub Date Free Form
Jul
Volume
17
Issue
7
Start Page
776
Other Pages
783
Notes
CI: (c) The Author 2014; JID: 9815751; 2014/01/06 [received]; 2014/08/10 [accepted]; 2014/09/19 [aheadofprint]; ppublish
Place of Publication
England
ISSN/ISBN
1469-994X; 1462-2203
Accession Number
PMID: 25239958
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1093/ntr/ntu184 [doi]
Output Language
Unknown(0)
PMID
25239958
Abstract
INTRODUCTION: To examine the long-term impact of graphic health-warning labels (GHWL) on adolescents' cognitive processing of warning labels and cigarette pack perceptions. METHODS: Cross-sectional school-based surveys of students aged 13-17 years residing in urban centers, conducted prior to GHWL introduction (2005) and 6 months (2006), 2 years (2008), and 5 years (2011) post-GHWL introduction. Students who had seen a cigarette pack in the previous 6 months or in 2006, who had seen GHWL were included in analyses (2005 n = 2,560; 2006 n = 1,306; 2008 n = 2,303; 2011 n = 2,716). Smoking stage, reported exposure to cigarette packs, cognitive processing of GHWL, and positive and negative perceptions of pack image were assessed. RESULTS: While cognitive processing of GHWL in 2006 and 2008 was greater than 2005 (p
Descriptors
Links
Book Title
Database
Publisher
. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco
Data Source
Authors
White,V., Bariola,E., Faulkner,A., Coomber,K., Wakefield,M.
Original/Translated Title
URL
Date of Electronic
20140919
PMCID
Editors
|
|||
| Are young people's beliefs about menthol cigarettes associated with smoking-related intentions and behaviors? | 2015 | Centre for Behavioural Research in Cancer, Cancer Council Victoria, Melbourne, Victoria, Australia; emily.brennan@cancervic.org.au.; Annenberg School for Communication, University of Pennsylvania, Philadelphia, PA.; Annenberg School for Communication, Uni | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco
Periodical, Abbrev.
Nicotine Tob.Res.
Pub Date Free Form
Jan
Volume
17
Issue
1
Start Page
81
Other Pages
90
Notes
LR: 20160101; CI: (c) The Author 2014; GR: P20 CA095856/CA/NCI NIH HHS/United States; GR: P20-CA095856/CA/NCI NIH HHS/United States; GR: P20-CA095856-09S1/CA/NCI NIH HHS/United States; JID: 9815751; 1490-04-6 (Menthol); EIN: Nicotine Tob Res. 2015 Nov;17(
Place of Publication
England
ISSN/ISBN
1469-994X; 1462-2203
Accession Number
PMID: 25151661
Language
eng
SubFile
Journal Article; Research Support, N.I.H., Extramural; IM
DOI
10.1093/ntr/ntu134 [doi]
Output Language
Unknown(0)
PMID
25151661
Abstract
INTRODUCTION: Little is known about the beliefs that youth and young adults hold about menthol cigarettes or the influence of these beliefs on tobacco use initiation. METHODS: Online cross-sectional surveys with 13- to 17-year-old current nonsmokers (n = 553) and 18- to 25-year-old never (n = 586) and current tobacco users (n = 307) in the United States assessed the association between endorsing each of 9 pro-menthol beliefs and (a) intentions to smoke menthol cigarettes over the next year, (b) current use of menthol cigarettes, (c) intentions to use tobacco in general over the next year, and (d) current use of tobacco products in general. RESULTS: Menthols were perceived to be less harmful and addictive than nonmenthol cigarettes by between 13% and 23% of respondents. Between 20% and 58% believed that menthols had favorable sensory properties, and 7%-25% believed that menthol smokers were more popular and attractive than nonmenthol smokers. Logistic regression analyses (adjusting for confounders) indicated that, on the whole, those who endorsed pro-menthol beliefs were more likely to intend to use, and to currently use, both menthols and tobacco products in general. For example, respondents who believed that menthol cigarettes were more refreshing in sensation (one of the most frequently endorsed beliefs) were significantly more likely to (a) intend to smoke menthol cigarettes (13- to 17-year-olds, odds ratio [OR] = 2.12, 95% confidence interval [CI] = 1.03, 4.34; 18- to 25-year olds, OR = 2.62, 95% CI = 1.04, 6.60), (b) currently use menthol cigarettes (18- to 25-year olds, OR = 3.40, 95% CI = 2.20, 5.26), (c) intend to use tobacco (13- to 17-year-olds OR = 1.74, 95% CI = 1.14, 2.65), and (d) currently use tobacco (18- to 25-year olds, OR = 2.06, 95% CI = 1.44, 2.93). CONCLUSIONS: Youth and young adults who do not currently smoke and who hold favorable beliefs about menthol cigarettes are at greater risk for beginning to use tobacco products, indicating that the availability of menthol cigarettes may contribute to tobacco use initiation. These findings support recent claims that the elimination of menthol cigarettes would improve public health in the United States.
Descriptors
Links
Book Title
Database
Publisher
. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco
Data Source
Authors
Brennan,E., Gibson,L., Momjian,A., Hornik,R.C.
Original/Translated Title
URL
Date of Electronic
20140823
PMCID
PMC4296170
Editors
|
|||
| Volatile organic compounds in selected micro-environments | 2006 | Centre for Ecosystem Management, School of Natural Sciences, Edith Cowan University, 100 Joondalup Drive, Joondalup 6027, Western Australia, Australia. a.hinwood@ecu.edu.au | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Chemosphere
Periodical, Abbrev.
Chemosphere
Pub Date Free Form
Apr
Volume
63
Issue
3
Start Page
421
Other Pages
429
Notes
LR: 20061115; JID: 0320657; 0 (Air Pollutants); 0 (Gasoline); 0 (Organic Chemicals); 0 (Smoke); 0 (Vehicle Emissions); 2004/08/10 [received]; 2005/08/18 [revised]; 2005/08/18 [accepted]; 2005/11/11 [aheadofprint]; ppublish
Place of Publication
England
ISSN/ISBN
0045-6535; 0045-6535
Accession Number
PMID: 16289288
Language
eng
SubFile
Journal Article; IM
DOI
S0045-6535(05)01067-2 [pii]
Output Language
Unknown(0)
PMID
16289288
Abstract
A program of sampling for volatile organic compounds (VOCs) in ambient air was undertaken in selected locations and micro-environments in Perth, Western Australia to characterise concentrations of target VOCs and to determine the relative strength of the contributing sources to ambient air in different micro-environments in a major Australian city. Twenty-seven locations were sampled and, of the forty-one target compounds, 26 VOCs were detected in the samples collected. The highest concentrations were recorded for benzene, toluene, ethylbenzene, xylenes (BTEX), chloroform and styrene. The maximum 12-h toluene and benzene concentrations observed were from a basement carpark and were 24.7 parts per billion (ppb) and 5.6 ppb, respectively. The maximum xylenes concentration was 29.4 ppb and occurred in a nightclub where styrene was also detected. A factor analysis of the data was undertaken. Two key factors emerge that appear to be associated with petroleum and motor vehicles and environmental tobacco smoke. A third significant occurrence was a high concentration of chloroform that was observed at a sports centre complex with a swimming pool text and was uncorrelated with other compounds in the data set. This study indicates that locations associated with motor vehicles and petrol fuel, tobacco and wood smoke and chlorinated water represent the major risks for personal exposure to VOCs in Perth.
Descriptors
Air Pollutants/analysis, Air Pollution, Indoor/analysis, Environmental Monitoring, Gasoline, Housing, Humans, Occupational Exposure/analysis, Organic Chemicals/analysis, Restaurants, Smoke, Tobacco, Vehicle Emissions, Volatilization, Western Australia, Wood, Workplace
Links
Book Title
Database
Publisher
Data Source
Authors
Hinwood,A. L., Berko,H. N., Farrar,D., Galbally,I. E., Weeks,I. A.
Original/Translated Title
URL
Date of Electronic
20051111
PMCID
Editors
|
|||
| Risk factors for increased BTEX exposure in four Australian cities | 2007 | Centre for Ecosystem Management, School of Natural Sciences, Edith Cowan University, 100 Joondalup Drive, Joondalup, Western Australia 6027, Australia. a.hinwood@ecu.edu.au | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Chemosphere
Periodical, Abbrev.
Chemosphere
Pub Date Free Form
Jan
Volume
66
Issue
3
Start Page
533
Other Pages
541
Notes
LR: 20151119; JID: 0320657; 0 (Benzene Derivatives); 0 (Organic Chemicals); 0 (Xylenes); 3FPU23BG52 (Toluene); J64922108F (Benzene); L5I45M5G0O (ethylbenzene); 2006/02/23 [received]; 2006/05/12 [revised]; 2006/05/21 [accepted]; 2006/07/11 [aheadofprint];
Place of Publication
England
ISSN/ISBN
0045-6535; 0045-6535
Accession Number
PMID: 16837022
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
S0045-6535(06)00711-9 [pii]
Output Language
Unknown(0)
PMID
16837022
Abstract
Benzene, toluene, ethylbenzene and xylenes (BTEX) are common volatile organic compounds (VOCs) found in urban airsheds. Elevated levels of VOCs have been reported in many airsheds at many locations, particularly those associated with industrial activity, wood heater use and heavy traffic. Exposure to some VOCs has been associated with health risks. There have been limited investigations into community exposures to BTEX using personal monitoring to elucidate the concentrations to which members of the community may be exposed and the main contributors to that exposure. In this cross sectional study we investigated BTEX exposure of 204 non-smoking, non-occupationally exposed people from four Australian cities. Each participant wore a passive BTEX sampler over 24h on five consecutive days in both winter and summer and completed an exposure source questionnaire for each season and a diary for each day of monitoring. The geometric mean (GM) and range of daily BTEX concentrations recorded for the study population were benzene 0.80 (0.04-23.8 ppb); toluene 2.83 (0.03-2120 ppb); ethylbenzene 0.49 (0.03-119 ppb); and xylenes 2.36 (0.04-697 ppb). A generalised linear model was used to investigate significant risk factors for increased BTEX exposure. Activities and locations found to increase personal exposure included vehicle repair and machinery use, refuelling of motor vehicles, being in an enclosed car park and time spent undertaking arts and crafts. A highly significant difference was found between the mean exposures in each of the four cities, which may be explained by differences in fuel composition, differences in the mix and density of industry, density of motor vehicles and air pollution meteorology.
Descriptors
Adult, Aged, Australia, Benzene/analysis, Benzene Derivatives/analysis, Cities, Environmental Exposure/analysis/statistics & numerical data, Environmental Monitoring/methods, Female, Humans, Male, Middle Aged, Organic Chemicals/analysis, Risk Factors, Surveys and Questionnaires, Time Factors, Toluene/analysis, Volatilization, Xylenes/analysis
Links
Book Title
Database
Publisher
Data Source
Authors
Hinwood,A. L., Rodriguez,C., Runnion,T., Farrar,D., Murray,F., Horton,A., Glass,D., Sheppeard,V., Edwards,J. W., Denison,L., Whitworth,T., Eiser,C., Bulsara,M., Gillett,R. W., Powell,J., Lawson,S., Weeks,I., Galbally,I.
Original/Translated Title
URL
Date of Electronic
20060711
PMCID
Editors
|
|||
| A systematic review and meta-analysis of the risk of increasing adiposity on Barrett's esophagus | 2008 | Centre for Epidemiology and Biostatistics, Leeds Institute for Genetics Health and Therapeutics, Faculty of Medicine and Health, University of Leeds, Leeds, England, United Kingdom. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
The American Journal of Gastroenterology
Periodical, Abbrev.
Am.J.Gastroenterol.
Pub Date Free Form
Feb
Volume
103
Issue
2
Start Page
292
Other Pages
300
Notes
LR: 20080530; JID: 0421030; CIN: Am J Gastroenterol. 2008 Feb;103(2):301-3. PMID: 18289199; CIN: Am J Gastroenterol. 2008 May;103(5):1316-7. PMID: 18477363; RF: 55; 2007/11/06 [aheadofprint]; ppublish
Place of Publication
United States
ISSN/ISBN
0002-9270; 0002-9270
Accession Number
PMID: 17986313
Language
eng
SubFile
Journal Article; Meta-Analysis; Review; IM
DOI
AJG1621 [pii]
Output Language
Unknown(0)
PMID
17986313
Abstract
OBJECTIVES: Esophageal adenocarcinoma and its precursor lesion, Barrett's esophagus, are increasing in incidence in western populations. Gastroesophageal reflux disease (GERD) and high body mass index (BMI) are known risk factors, but it is unclear whether BMI mediates its risk on Barrett's esophagus independently. This systematic review and meta-analysis investigated whether increasing BMI is associated with Barrett's esophagus as compared to general population and GERD controls. METHODS: Search strategies were conducted in MEDLINE (U.S. National Library of Medicine, Bethesda, MD) (1966-2005) and EMBASE (Reed Elsevier PLC, Amsterdam, The Netherlands) (1980-2005). Studies to be included were required to present "current" BMI data for consecutively recruited Barrett's esophagus patients and appropriate comparison arms with a minimum number of 30 subjects in each. RESULTS: The literature search produced 5,501 hits from which 295 papers were extracted. Only 10 studies met the criteria for inclusion. The Statistics/Data Analysis (STATA) program was used to conduct random effects meta-analyses. Nine studies comparing the BMI of the Barrett's esophagus and GERD groups produced a pooled odds ratio (OR) of 0.99 per kg/m2 (95% confidence interval [CI] 0.97-1.01, I2= 52%), while the pooled estimate of three studies comparing Barrett's esophagus with general population controls was 1.02 per kg/m2 (95% CI 1.01-1.04, I2= 0%). CONCLUSIONS: Increasing adiposity is only an indirect risk factor of Barrett's esophagus through the precursor lesion of GERD. Hence, BMI status has no predictive value with respect to GERD patients and their risk of progression to Barrett's esophagus.
Descriptors
Adipose Tissue, Barrett Esophagus/epidemiology/etiology, Body Mass Index, Gastroesophageal Reflux/complications, Humans, Risk Factors
Links
Book Title
Database
Publisher
Data Source
Authors
Cook,M. B., Greenwood,D. C., Hardie,L. J., Wild,C. P., Forman,D.
Original/Translated Title
URL
Date of Electronic
20071106
PMCID
Editors
|
|||
| pH affects ammonium, nitrate and proton fluxes in the apical region of conifer and soybean roots | 2010 | Centre for Forest Biology, University of Victoria, P.O. Box 3020 STN CSC, Victoria, BC, Canada, V8W 3N5. bhawkins@uvic.ca | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Physiologia Plantarum
Periodical, Abbrev.
Physiol.Plant.
Pub Date Free Form
Feb
Volume
138
Issue
2
Start Page
238
Other Pages
247
Notes
LR: 20151119; JID: 1256322; 0 (Nitrates); 0 (Protons); 0 (Quaternary Ammonium Compounds); 0 (Soil); N762921K75 (Nitrogen); 2009/10/27 [aheadofprint]; ppublish
Place of Publication
Denmark
ISSN/ISBN
1399-3054; 0031-9317
Accession Number
PMID: 19947965
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1111/j.1399-3054.2009.01317.x [doi]
Output Language
Unknown(0)
PMID
19947965
Abstract
The effect of pH on nitrate and ammonium uptake in the high-affinity transport system and low-affinity transport system ranges was compared in two conifers and one crop species. Many conifers grow on acidic soils, thus their preference for ammonium vs nitrate uptake can differ from that of crop plants, and the effect of pH on nitrogen (N) uptake may differ. Proton, ammonium and nitrate net fluxes were measured at seedling root tips and 5, 10, 20 and 30 mm from the tips using a non-invasive microelectrode ion flux measurement system in solutions of 50 or 1500 microM NH(4)NO(3) at pH 4 and 7. In Glycine max and Pinus contorta, efflux of protons was observed at pH 7 while pH 4 resulted in net proton uptake in some root regions. Pseudotsuga menziesii roots consistently showed proton efflux behind the root tip, and thus appear better adapted to maintain proton efflux in acid soils. P. menziesii's ability to maintain ammonium uptake at low pH may relate to its ability to maintain proton efflux. In all three species, net nitrate uptake was greatest at neutral pH. Net ammonium uptake in G. max and net nitrate uptake in P. menziesii were greatly reduced at pH 4, particularly at high N concentration, thus N concentration should be considered when determining optimum pH for N uptake. In P. menziesii and G. max, net N uptake was greater in 1500 than 50 microM NH(4)NO(3) solution, but flux profiles of all ions varied among species.
Descriptors
Hydrogen-Ion Concentration, Nitrates/metabolism, Nitrogen/metabolism, Pinus/metabolism, Plant Roots/metabolism, Protons, Pseudotsuga/metabolism, Quaternary Ammonium Compounds/metabolism, Seedlings/metabolism, Soil/analysis, Soybeans/metabolism
Links
Book Title
Database
Publisher
Data Source
Authors
Hawkins,B. J., Robbins,S.
Original/Translated Title
URL
Date of Electronic
20091027
PMCID
Editors
|
|||
| Family variation in nutritional and growth traits in Douglas-fir seedlings | 2007 | Centre for Forest Biology, University of Victoria, PO Box 3020 STN CSC, Victoria, BC V8W 3N5, Canada. bhawkins@uvic.ca | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Tree physiology
Periodical, Abbrev.
Tree Physiol.
Pub Date Free Form
Jun
Volume
27
Issue
6
Start Page
911
Other Pages
919
Notes
LR: 20151119; JID: 100955338; 0 (Nitrates); 0 (Quaternary Ammonium Compounds); N762921K75 (Nitrogen); ppublish
Place of Publication
Canada
ISSN/ISBN
0829-318X; 0829-318X
Accession Number
PMID: 17331909
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
Output Language
Unknown(0)
PMID
17331909
Abstract
Nitrogen (N) uptake and utilization in seedlings of six full-sib families of coastal Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) known to differ in growth rate were assessed at the whole plant and root levels. Seedlings were grown in soil or aeroponically with high and low nutrient availability. Consistent family differences in growth rate and N utilization index were observed in both soil and aeroponic culture, and high-ranking families by these measures also had greater net N uptake in soil culture. Two of the three families found to be fast-growing in long-term field trials exhibited faster growth, higher N utilization indices and greater net N uptake at the seedling stage. Mean family net influx of ammonium (NH4+) and efflux of nitrate (NO3-) in the high- and low-nutrient treatments were significantly correlated with measures of mean family biomass. The high-nutrient availability treatment increased mean net fluxes of NH4+ and NO3- in roots. These results indicate that efficiency of nutrient uptake and utilization contribute to higher growth rates of trees. Nutrient-related traits should be considered in tree breeding programs, as the indications are that assessments may be made at an early stage.
Descriptors
Nitrates/metabolism, Nitrogen/metabolism, Plant Roots/growth & development/metabolism, Pseudotsuga/growth & development/metabolism, Quaternary Ammonium Compounds/metabolism, Seedlings/growth & development/metabolism
Links
Book Title
Database
Publisher
Data Source
Authors
Hawkins,B. J.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
|
|||
| A comparison of ammonium, nitrate and proton net fluxes along seedling roots of Douglas-fir and lodgepole pine grown and measured with different inorganic nitrogen sources | 2008 | Centre for Forest Biology, University of Victoria, PO Box 3020 STN CSC, Victoria, British Columbia, Canada. bhawkins@uvic.ca | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Plant, Cell & Environment
Periodical, Abbrev.
Plant.Cell.Environ.
Pub Date Free Form
Mar
Volume
31
Issue
3
Start Page
278
Other Pages
287
Notes
LR: 20151119; JID: 9309004; 0 (Nitrates); 0 (Protons); 0 (Quaternary Ammonium Compounds); N762921K75 (Nitrogen); 2007/11/22 [aheadofprint]; ppublish
Place of Publication
United States
ISSN/ISBN
1365-3040; 0140-7791
Accession Number
PMID: 18034773
Language
eng
SubFile
Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
PCE1760 [pii]
Output Language
Unknown(0)
PMID
18034773
Abstract
Significant spatial variability in NH4+, NO3- and H+ net fluxes was measured in roots of young seedlings of Douglas-fir (Pseudotsuga menziesii) and lodgepole pine (Pinus contorta) with ion-selective microelectrodes. Seedlings were grown with NH4+, NO3-, NH4NO3 or no nitrogen (N), and were measured in solutions containing one or both N ions, or no N in a full factorial design. Net NO3- and NH4+ uptake and H+ efflux were greater in Douglas-fir than lodgepole pine and in roots not exposed to N in pretreatment. In general, the rates of net NH4+ uptake were the same in the presence or absence of NO3-, and vice versa. The highest NO3- influx occurred 0-30 mm from the root apex in Douglas-fir and 0-10 mm from the apex in lodgepole pine. Net NH4+ flux was zero or negative (efflux) at Douglas-fir root tips, and the highest NH4+ influx occurred 5-20 mm from the root tip. Lodgepole pine had some NH4+ influx at the root tips, and the maximum net uptake 5 mm from the root tip. Net H+ efflux was greatest in the first 10 mm of roots of both species. This study demonstrates that nutrient uptake by conifer roots can vary significantly across different regions of the root, and indicates that ion flux profiles along the roots may be influenced by rates of root growth and maturation.
Descriptors
Nitrates/metabolism, Nitrogen/metabolism, Pinus/metabolism, Plant Roots/metabolism, Protons, Pseudotsuga/metabolism, Quaternary Ammonium Compounds/metabolism, Seedlings/metabolism, Species Specificity
Links
Book Title
Database
Publisher
Data Source
Authors
Hawkins,B. J., Boukcim,H., Plassard,C.
Original/Translated Title
URL
Date of Electronic
20071122
PMCID
Editors
|
|||
| Ammonium and nitrate uptake, nitrogen productivity and biomass allocation in interior spruce families with contrasting growth rates and mineral nutrient preconditioning | 2007 | Centre for Forest Biology, University of Victoria, PO Box 3020, STN CSC, Victoria, BC V8N 1J3, Canada. | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Tree physiology
Periodical, Abbrev.
Tree Physiol.
Pub Date Free Form
Jun
Volume
27
Issue
6
Start Page
901
Other Pages
909
Notes
LR: 20131121; JID: 100955338; 0 (Nitrates); 0 (Quaternary Ammonium Compounds); N762921K75 (Nitrogen); ppublish
Place of Publication
Canada
ISSN/ISBN
0829-318X; 0829-318X
Accession Number
PMID: 17331908
Language
eng
SubFile
Journal Article; IM
DOI
Output Language
Unknown(0)
PMID
17331908
Abstract
Four full-sib families of interior spruce (Picea glauca (Moench) Voss) x Picea engelmanii Parry ex Engelm.) with contrasting growth rates (two fast-growing and two slow-growing families) were grown aeroponically with either a 2% relative nitrogen addition rate or free access to nitrogen. Fast-growing families showed greater plasticity in allocating biomass to shoots at high nitrogen supply and to roots at low nitrogen supply than slow-growing families. Compared with the slow-growing families, short-term net ammonium uptake rate measured with an ion selective electrode was significantly greater in fast-growing families at high ammonium supply, but not at low supply. Net nitrate uptake showed the same trend, but differences among families were not significant. Results indicate that differences in seedling growth rate are partly a result of physiological differences in net nitrogen uptake efficiency and nitrogen productivity.
Descriptors
Algorithms, Biomass, Models, Biological, Nitrates/metabolism, Nitrogen/metabolism, Picea/growth & development/metabolism, Quaternary Ammonium Compounds/metabolism, Time Factors
Links
Book Title
Database
Publisher
Data Source
Authors
Miller,B. D., Hawkins,B. J.
Original/Translated Title
URL
Date of Electronic
PMCID
Editors
|
|||
| Temperature effects on nitrogen form uptake by seedling roots of three contrasting conifers | 2014 | Centre for Forest Biology, University of Victoria, PO Box 3020, STN CSC, Victoria, BC, Canada V8W 3N5.; Centre for Forest Biology, University of Victoria, PO Box 3020, STN CSC, Victoria, BC, Canada V8W 3N5 bhawkins@uvic.ca.; Centre for Forest Biology, Uni | Read more... |
|
Source Type
Print(0)
Ref Type
Journal Article
Periodical, Full
Tree physiology
Periodical, Abbrev.
Tree Physiol.
Pub Date Free Form
May
Volume
34
Issue
5
Start Page
513
Other Pages
523
Notes
LR: 20151119; CI: (c) The Author 2014; JID: 100955338; 0 (Soil); N762921K75 (Nitrogen); OTO: NOTNLM; 2014/05/14 [aheadofprint]; ppublish
Place of Publication
Canada
ISSN/ISBN
1758-4469; 0829-318X
Accession Number
PMID: 24831958
Language
eng
SubFile
Journal Article; Research Support, Non-U.S. Gov't; IM
DOI
10.1093/treephys/tpu028 [doi]
Output Language
Unknown(0)
PMID
24831958
Abstract
Plant species may show a preference for uptake of particular nitrogen (N) forms, but little is known about how N form preference is influenced by soil temperature. Potential future changes in soil N form availability and plant N form preference in warmer soils might shift competitive interactions among forest tree species. We compared the N uptake and growth of three conifer species from contrasting environments grown at rhizosphere temperatures of 10, 16 or 20 degrees C and supplied with ammonium (NH4 (+)) or nitrate (NO3 (-)) or a mix of arginine and alanine. Short-term N uptake was assessed using ion-selective microelectrodes and application of (15)N, and long-term uptake was assessed by plant N status. Species exhibited preferences for particular N forms, and these preferences related to the N form most available in native soils. Specifically, Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) showed a preference for nitrate (a N form commonly found in warmer areas), Sitka spruce (Picea sitchensis (Bong.) Carr.) preferred ammonium (a N form abundant in cold soils) and Engelmann spruce (Picea engelmannii Parry ex Engelm.) showed a preference for ammonium and organic N (organic N is often abundant in cold soils). Relative N form preference, as indicated by plant growth, changed with temperature in some species, indicating that these species could acclimate to changing rhizosphere temperatures. Understanding how conifers utilize available soil nutrients at different temperatures can help to predict species' future performance as soil temperatures rise.
Descriptors
Links
Book Title
Database
Publisher
. Published by Oxford University Press
Data Source
Authors
Boczulak,S.A., Hawkins,B.J., Roy,R.
Original/Translated Title
URL
Date of Electronic
20140514
PMCID
Editors
|
|||