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N. Vutto, T. Gapeeva, ?. Pundik, I. Volotovsky

Transgenic potato plants of Belarusian varieties with genes for synthesis of cecropin-mellitin cationic antimicrobial peptides had increased resistance against pathogens Phytophtora infestans and Alternaria solani.

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Antioxidant Capacity and Polyphenol Content of Brown Seawedds after Heat Processing
Gaurav Rajauria, Shilpi Gupta, Nissreen Abu-Ghannam and Amit Kumar

Seaweeds or marine macroalgae are renewable living resources which are also used as food, feed and fertilizer in many parts of the world. They are able to produce a great variety of secondary metabolites. Results showed that the heat processing not only enhanced the contents of biologically active compounds in seaweeds but also the biological activity associated with these compounds as compared to the unprocessed seaweeds.

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Biomass and Quercetin Accumulation Predict Drought Sensitivity in a Novel White Clover Hybrid
Wouter L. Ballizany; Rainer W. Hofmann; Brent A. Barrett

Previous research showed that levels of the flavonol quercetin (Q) were positively associated with UV stress resistance in populations of white clover (Trifolium repens L.), and inversely linked to dry matter (DM) production (Hofmann et al, 2000). Q, and to a lesser degree its precursor kaempferol (K), have been implicated as antioxidants and energy dissipating compounds in plants exposed to stress, and could be useful markers for resistance to other stress factors.

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Biomass and Quercetin Accumulation Predict Drought Sensitivity in a Novel White Clover Hybrid
Wouter L. Ballizany, Rainer W. Hofmann, Brent A. Barrett

This study shows for the first time that drought resistance in a new white clover hybrid can be linked to drought-induced increases in quercetin levels, and quercetin-to-kaempferol ratio levels. Subsequent DNA-marker analysis studies will be used to identify quantitative trait loci (QTL) for improved drought resistance in white clover to combine high Q response with high herbage yield.

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Collaboration key to developing world genomics research

Information exchange and knowledge transfer are key to harnessing genomics research for developing countries, write Josefina Coloma and Eva Harris in a PLoS Medicine essay.

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Effects of host plant and temperature on Aphidius colemani (Hymenoptera: Braconidae) intrinsic rate of population increase
Rostislav Zemek, Vojtech Jarosik, Jan Havelka and Fernando P. Chihale

The aim of this paper was to investigate the aphid-mediated effects of plant (Nicotiana tabacum or Vicia faba ) on A. colemani life-history characteristics. The obtained results corroborated our hypothesis that the host plant is important factor in an aphid-parasitoid relationship. Plant toxins are probably the cause of lower rate of population increase in A. colemani developed on tobacco-reared aphids.

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Perspectives on the biological control of Cameraria ohridella
Rostislav Zemek, Eva Prenerova, Lubomir Volter, Frantisek Weyda and Vaclav Skuhravy

We studied the impact of parasitoids on C. ohridella in the Czech Republic and also searched for entomopathogenic fungi associated with this pest. The results showed that the rate of parasitism was 5-15%. The most abundant parasitoid species were Minotetrastichus frontalis, Pnigalio sp. and Pediobius saulius. Using the Galleria-bait method we isolated many strains of entomopathogenic fungi. Dominant species were Paecilomyces fumosoroseus, Paecilomyces farinosus and Beauveria bassiana.

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Low-cost wind tunnel for micro-arthropods
Rostislav Zemek and Frantisek Reindl

Here we describe a construction of wind tunnel suitable for close-up observation of micro-arthropods behavior under various conditions. The tunnel was made of glass with inner dimensions 6x6x110 centimeters. Both the inlet and outlet compartments were equipped with an electric fan, series of plastic diffusers and a metal mesh to minimize wind turbulence inside a 40 centimeters-long observation chamber in the middle of the tunnel.

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The first record of Beauveria bassiana (Deuteromycetes) on the hibernating pupae of Cameraria ohridella (Lepidoptera: Gracillariidae)
Eva Prenerová, Rostislav Zemek, František Weyda

Samples of the horse chestnut leaves with C. ohridella pupae were collected in autumn at Ceske Budejovice. The leaves were dissected and the pupae were individually placed into the 23°C and 95% R.H. Development of mycosis was frequently observed but only a few pupae were infected by B. bassiana. The strains of the fungus were isolated from individual pupae and deposited in Culture Collection of Entomopathogenic Fungi Olesna.

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Showing Results 61 - 70 of 74
Scientific News
Plant Variants Point the Way to Improved Biofuel Production
Manufacturing biofuels from food crop by-products such as straw could be made quicker and cheaper thanks to a new study led by scientists at the University of York.
Improving Korean Wheat
Dae Wook Kim learns genetic screening techniques to develop a line of Korean wheat.
Merck Animal Health to Market Neogen's Dairy Genomic Program
Agreement to market Neogen's Igenity® Dairy Heifer Program.
A Big Step Towards More Efficient Photosynthesis
For the first time flowering plants have been successfully engineered to fix carbon like the blue-green algae do - this can potentially increase photosynthesis and yields in crop plants.
Corn Spots: Study Finds Important Genes in Defense Response
A number of candidate genes have been identified that appear to control the defense response in corn.
Genetic Basis for Rabbit Domestication Revealed
Research presents key findings in the DNA make-up of the common mammal’s brain and nervous system, which determines how wild rabbits were genetically transformed to domestic rabbits.
Scientists Looking Across Human, Fly and Worm Genomes Find Shared Biology
Studies reveal powerful commonalities in biological activity and regulation among species.
Genetics Used to Improve Plants for Bioenergy
An upcoming genetics investigation into the symbiotic association between soil fungi and feedstock plants for bioenergy production could lead to more efficient uptake of nutrients, which would help limit the need for expensive and polluting fertilizers.
Wild Sheep Show Benefits of Putting Up With Parasites
Researchers used 25 years of data on a population of wild sheep living on an island in northwest Scotland to assess the evolutionary importance of infection tolerance.
Completing Genome Sequence of Model Bacterium to Help Improve Grass-Crop Harvests
The soil bacterium, isolated from wheat roots in the central region of Argentina, has been used as a bio-fertiliser in agriculture during the last four decades.
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