Biology Agriculture Aquaculture Horticulture Postharvest Forestry Geography Environment Health





Agriculture

Evolution of gene structure in the conifer Picea glauca: a comparative analysis of the impact of intron size
submitted by 1 hour ago - Topic: Agriculture
A positive relationship between genome size and intron length is observed across eukaryotes including Angiosperms plants, indicating a co-evolution of genome size and gene structure. Conifers have very large genomes and longer introns on average than most plants, but impacts of their large genome and longer introns on gene structure has not be described. :Gene structure was analyzed for 35 gene...



Transcriptome profiling of genes and pathways associated with arsenic toxicity and tolerance in Arabidopsis
submitted by 1 hour ago - Topic: Agriculture
Arsenic (As) is a toxic metalloid found ubiquitously in the environment and widely considered an acute poison and carcinogen. However, the molecular mechanisms of the plant response to As and ensuing tolerance have not been extensively characterized. Here, we report on transcriptional changes with As treatment in two Arabidopsis accessions, Col-0 and Ws-2. :The root elongation rate was greater ...

Soybean (Glycine max) expansin gene superfamily origins: segmental and tandem duplication events followed by divergent selection among subfamilies
submitted by 1 hour ago - Topic: Agriculture
Expansins are plant cell wall loosening proteins that are involved in cell enlargement and a variety of other developmental processes. The expansin superfamily contains four subfamilies; namely, alpha-expansin (EXPA), beta-expansin (EXPB), expansin-like A (EXLA), and expansin-like B (EXLB). Although the genome sequencing of soybeans is complete, our knowledge about the pattern of expansion and ...

Synthetic versions of firefly luciferase and Renilla luciferase reporter genes that resist transgene silencing in sugarcane
submitted by 1 hour ago - Topic: Agriculture
Down-regulation or silencing of transgene expression can be a major hurdle to both molecular studies and biotechnology applications in many plant species. Sugarcane is particularly effective at silencing introduced transgenes, including reporter genes such as the firefly luciferase gene. Synthesizing transgene coding sequences optimized for usage in the host plant is one method of enhancing tra...

RNA sequencing-mediated transcriptome analysis of rice plants in endoplasmic reticulum stress conditions
submitted by 1 hour ago - Topic: Agriculture
The endoplasmic reticulum (ER) stress response is widely known to function in eukaryotes to maintain the homeostasis of the ER when unfolded or misfolded proteins are overloaded in the ER. To understand the molecular mechanisms of the ER stress response in rice (Oryza sativa L.), we previously analyzed the expression profile of stably transformed rice in which an ER stress sensor/transducer OsI...



Genetic analysis of tolerance to the root lesion nematode Pratylenchus neglectus in the legume Medicago littoralis
submitted by 1 hour ago - Topic: Agriculture
The nematode Pratylenchus neglectus has a wide host range and is able to feed on the root systems of cereals, oilseeds, grain and pasture legumes. Under the Mediterranean low rainfall environments of Australia, annual Medicago pasture legumes are used in rotation with cereals to fix atmospheric nitrogen and improve soil parameters. Considerable efforts are being made in breeding programs to imp...

ARACNe-based inference, using curated microarray data, of Arabidopsis thaliana root transcriptional regulatory networks
submitted by 1 hour ago - Topic: Agriculture
Uncovering the complex transcriptional regulatory networks (TRNs) that underlie plant and animal development remains a challenge. However, a vast amount of data from public microarray experiments is available, which can be subject to inference algorithms in order to recover reliable TRN architectures. :In this study we present a simple bioinformatics methodology that uses public, carefully cura...


Arabidopsis genes, AtNPR1, AtTGA2 and AtPR-5, confer partial resistance to soybean cyst nematode (Heterodera glycines) when overexpressed in transgenic soybean roots
submitted by 1 hour ago - Topic: Agriculture
Extensive studies using the model system Arabidopsis thaliana to elucidate plant defense signaling and pathway networks indicate that salicylic acid (SA) is the key hormone triggering the plant defense response against biotrophic and hemi-biotrophic pathogens, while jasmonic acid (JA) and derivatives are critical to the defense response against necrotrophic pathogens. Several reports demonstrat...

Characterisation of wild cabbage (Brassica oleracea L.) based on isoenzyme data. Considerations on the current status of this taxon in Spain
submitted by 1 hour ago - Topic: Agriculture
As a part of a wide project to determine the conservation status and collecting expeditions of wild plant genetic resources of genus Brassica (species n = 9) of the Iberian Peninsula, twenty-nine wild populations of Brassica oleracea L. were characterised using the isoenzymatic profiles of seeds collected from their natural habitats. The zymograms, obtained using bulking seeds, identified sam...


Genetic diversity of Jatropha curcas L. in Senegal compared with exotic accessions based on microsatellite markers
submitted by 1 hour ago - Topic: Agriculture
Significant efforts have been undertaken in West Africa to increase biofuel production with the expectation to alleviate the dependency on fossil energies and to reduce rural poverty by diversifying cultivated crops. In this context, Jatropha curcas L., a shrub belonging to Euphorbiaceae family, has gained great interest because of its oil which can be converted to biodiesel. It is also highly ...

Aegilops tauschii Coss.: allelic variation of enzyme-encoding genes and ecological differentiation of the species
submitted by 1 hour ago - Topic: Agriculture
Three hundred and seven accessions of Aegilops tauschii Coss., including 160 of subsp. tauschii and 147 of subsp. strangulata, representing all the species range—from Turkey to Kirgizstan, were analyzed electrophoretically. Twenty polymorphic enzyme-encoding loci were studied, 10 of which were essentially polymorphic in Ae. tauschii. Climatic data for each of the 307 Ae. tauschii habitats wer...


The Role of Index Trading in Price Formation in the Grains and Oilseeds Markets
submitted by 1 hour ago - Topic: Agriculture
We use both Granger-causality and instrumental variables (IV) methods to examine the impact of index fund positions on price returns for the main US grains and oilseed futures markets. Our analysis supports earlier conclusions that Granger-causal impacts are generally not discernible. However, market microstructure theory suggests trading impacts should be instantaneous. IV-based tests for cont...

Control of alternaria black spot in persimmon fruit by a mixture of gibberellin and benzyl adenine, and its mode of action
submitted by 1 hour ago - Topic: Agriculture
In Israel, alternaria black spot (ABS) disease, caused by Alternaria alternata, is the main postharvest factor that reduces quality and impairs storability of persimmon fruit Diospyros kaki cv. Triumph. The fungus infects the fruit in the orchard and remains quiescent until harvest, or renews its development just before harvest, following rain or high humidity; it then preferentially colonizes ...

Effect of red and blue LED light irradiation on ascorbate content and expression of genes related to ascorbate metabolism in postharvest broccoli
submitted by 1 hour ago - Topic: Agriculture
The effects of red and blue light-emitting diode (LED) lights on the senescence of broccoli (Brassica oleracea L. var. italica) after harvest were investigated. The results showed that irradiation with red LED light was effective in delaying senescence in broccoli after harvest. Under red LED light, the yellowing process was delayed, and ethylene production and reduction of ascorbate (AsA) were...

Postharvest ethylene conditioning as a tool to reduce quality loss of stored mature sweet oranges
submitted by 1 hour ago - Topic: Agriculture
Ethylene is related to senescence but also induces protective mechanisms against stress in plants. The citrus industry only applies the hormone to induce fruit degreening. The aim of this work was to determine the effect of ethylene on the quality of colored citrus fruit stored under commercial conditions to extend postharvest life, since it protects them from stress causing postharvest disorde...



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