Gas-cooled nuclear power plants in the UK release sulphur-35 during their routine operation, which can be readily assimilated by vegetation. It is therefore necessary to be able to model the uptake of such releases in order to quantify any potential contamination of the food chain. A model is described which predicts the concentration of (35)S in crop components following an aerial gaseous release. Following deposition the allocation to crop components is determined by an export function from a labile pool, the leaves, to those components growing most actively post exposure. The growth rates are determined by crop growth data, which is also used to determine the concentration. The loss of activity is controlled by radioactive decay only. The paper describes the calibration and the validation of the model. To improve the model, further experimental work is required particularly on the export kinetics of (35)S. It may be possible to adapt such a modelling approach to the prediction of crop content for gaseous releases of (3)H and (14)C from nuclear facilities.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.envpol.2004.07.002 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Understanding pectin cross-linking in plant cell walls.
Commun Biol
January 2025
Department of Chemistry, University of Warwick, Coventry, UK.
Pectin is a major component of plant cells walls. The extent to which pectin chains crosslink with one another determines crucial properties including cell wall strength, porosity, and the ability of small, biologically significant molecules to access the cell. Despite its importance, significant gaps remain in our comprehension, at the molecular level, of how pectin cross-links influence the mechanical and physical properties of cell walls.
View Article and Find Full Text PDFMetal ion transport in maize: survival in a variable stress environment.
J Genet Genomics
January 2025
State Key Laboratory of Plant Environmental Resilience, College of Biological Sciences, China Agricultural University, Beijing 100193, China. Electronic address:
Maize (Zea mays) is the most widely cultivated crop in the world. Maize production is closely linked to the extensive uptake and utilization of various mineral nutrients. Potassium (K), calcium (Ca), and magnesium (Mg) are essential metallic macronutrients for plant growth and development.
View Article and Find Full Text PDFFatty acid desaturase 3-mediated α-linolenic acid biosynthesis in plants.
Plant Physiol
January 2025
Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY 40546-0312, USA.
Omega (ω)-3 fatty acids (FAs) are essential components of cell membranes that also serve as precursors of numerous regulatory molecules. α-linolenic acid (ALA), one of the most important ω3 FAs in plants, is synthesized in both the plastid and extraplastidial compartments. FA Desaturase (FAD) 3 is an extraplastidial enzyme that converts linoleic acid (LA) to ALA.
View Article and Find Full Text PDFPROCERA interacts with JACKDAW in gibberellin-enhanced source-sink sucrose partitioning in tomato.
Plant Physiol
January 2025
Shaanxi Engineering Research Center for Vegetables/College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China.
Proper regulation of the source-sink relationship is an effective way to increase crop yield. Gibberellin (GA) is an important regulator of plant growth and development, and physiological evidence has demonstrated that GA can promote source-sink sucrose partitioning. However, the underlying molecular mechanism remains unclear.
View Article and Find Full Text PDFIncorporating spatial and genetic competition into breeding pipelines with the R package gencomp.
Heredity (Edinb)
January 2025
Department of General Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil.
Genetic competition can obscure the true merit of selection candidates, potentially leading to altered genotype rankings and a divergence between expected and actual genetic gains. Despite a wealth of literature on genetic competition in plant and animal breeding, the separation of genetic values into direct genetic effects (DGE, related to a genotype's merit) and indirect genetic effects (IGE, related to the effects of a genotype's alleles on its neighbor's phenotype) in linear mixed models is often overlooked, likely due to the complexity involved. To address this, we introduce gencomp, a new R package designed to simplify the use of (spatial-) genetic competition models in crop and tree breeding routines.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!