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| Registros recuperados: 241 | |
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| Nadine Drechsler; Antje Habekuß; Thomas Thieme; Jörg Schubert. |
| Enhanced or reduced uptake of viruses by vectors and changes in resistance level can be sensitive indicators for metabolic changes in transgenic plants caused by the new trait and not observed by conventional methods. In addition, the plant transformation process itself can lead to such changes. To be able to investigate this hypothesis in cereals we decided to use two highly important insect-transmitted viruses infecting them - _Barley yellow dwarf virus_ (BYDV) and _Wheat dwarf virus_ (WDV). Corresponding molecular tools for their quantification in plants as well as virus vectors had to be developed. 
Both viruses cause similar symptoms: dwarfing, stunting, leaf discoloration leading to yield losses or death of plant. BYDV... |
| Tipo: Poster |
Palavras-chave: Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4493/version/1 |
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| Naheed Akhtar; Noreen Moin; Ghulam Jilani; Ata U. Mohsin; Shaheena Yasmin; Afzala Afzala; Munir Goraya; Atif A. Baig. |
| Aims and introduction
All over the world aphids are pests of economic importance, affecting all varieties of plants like cereal crops, vegetables, ornamental plants and fruits. Aphids damage plants either directly or indirectly. Aphids are one of the major agricultural pests. There are only a few plants that are not susceptible to infestation by this destructive pest. They cause direct damage by sucking the sap of leaves, blocking photosynthesis which results in leaf distortion, gall production, discoloration, stunting, leaf curling, wilting, twisting and premature leaf falls. They are directly involved in transmission of plant viruses and indirectly by depositing honey dew that reduces photosynthetic activity and induces sooty mold... |
| Tipo: Presentation |
Palavras-chave: Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/5947/version/1 |
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| Pablo T. Georgiadis; Jens Pistorius; Udo Heimbach. |
| In late April 2008, dust drift containing insecticide resulted in the largest bee poisoning in Germany for 30 years. The reason for these incidents was the contamination of flowering bee forage plants with dust particles abraded from maize seeds treated with Clothianidin recorded in the Upper Rhine Valley, Baden-Wuerttemberg and in parts of Bavaria during sowing of maize.

Clothianidin, an insecticidal active substance from the group of neonicotinoids, works as agonist at the nicotinic acetylcholine receptors with broad spectrum of efficacy. Clothianidin is also used as a seed dressing of maize (agent for seed treatment “Poncho Pro®”; 1,.25 mg a.i. Clothianidin./kernel) for the control of the... |
| Tipo: Presentation |
Palavras-chave: Chemistry; Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/5738/version/1 |
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| Vishal Gaurav; Amit Shavit; Susan C. Roberts. |
| Plant cell cultures of Taxus provide the most reliable production methods for the anti-cancer drug paclitaxel. In order to comprehend the inherent culture heterogeneity and production variability in cell cultures, it is essential that the cellular metabolism is studied at the genomic level. Genomic stability in plant cell cultures is crucial as it affects cell growth and division, metabolite accumulation and protein synthesis. A rapid and efficient method to prepare nuclei suspensions from aggregated cell cultures of Taxus was employed. Methods were subsequently developed to simultaneously stain them for DNA and protein content using Propidium Iodide and Fluorescein Isothiocyanate respectively. Flow cytometry was used to analyze and quantify the DNA... |
| Tipo: Poster |
Palavras-chave: Biotechnology; Cancer; Developmental Biology; Genetics & Genomics; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3809/version/1 |
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| Claudia Ciotir; Chris Yesson; Alastair Culham. |
| _Cyclamen_ (Myrsinaceae) occupy the Mediterranean region, with highest diversity in Greece and Turkey, with a few species endemic to islands. _Cyclamen_ species have a phenological preference for dry summers and wet winters. A recent study developed models of the climatic niches of _Cyclamen_. These models were projected into future climate scenarios for 2050. The area of climatic suitability for every _Cyclamen_ species is predicted to decrease. A limited dispersal capacity places them at high risk of extinction. Half of the species are threat ened with extinction due to their potential area loss, indicating that conservation and protection for these species has to be implemented by adding them to the red list. |
| Tipo: Poster |
Palavras-chave: Ecology; Plant Biology; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3066/version/1 |
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| Ramar Perumal Samy; S. Ignacimuthu; Vincent TK Chow. |
| Synthetic drugs, which are having serious side effects, are cytotoxic to human beings. Moreover, bacteria slowly become resistant against antibiotics. In order to overcome these problems, scientists are continuing to search for antibacterial and novel principles from plants. Zanthoxylum limonella has been popularly used in traditional systems of medicine for the treatment of dental caries, cardiac, respiratory diseases and stomach problems. The present study was therefore focused on finding out the medicinal properties of the bark of Z. limonella tested against some selected bacteria using disc-diffusion method at the concentration of 100, 200 and 300 mg/ml. The methanol and water extracts of the bark exhibited effective antibacterial activity against S.... |
| Tipo: Manuscript |
Palavras-chave: Microbiology; Pharmacology; Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6027/version/1 |
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| Lev V. Kalmykov; Vyacheslav L. Kalmykov. |
| Bacteria and plants are able to form population waves as a result of their consumer behaviour and propagation. A soliton-like interpenetration of colliding population waves was assumed but not proved earlier. Here we show how and why colliding population waves of trophically identical but fitness different species can interpenetrate through each other without delay. We have hypothesized and revealed here that the last mechanism provides a stable coexistence of two, three and four species, competing for the same limiting resource in the small homogeneous habitat under constant conditions and without any fitness trade-offs. We have explained the mystery of biodiversity mechanistically because (i) our models are bottom-up mechanistic, (ii) the revealed... |
| Tipo: Manuscript |
Palavras-chave: Biotechnology; Ecology; Microbiology; Bioinformatics; Plant Biology; Evolutionary Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6667/version/1 |
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| Pankaj Kumar; Gopal S. Rawat. |
| Orchids are truly extraordinary organisms exhibiting a wide range of pollination mechanism, many of which awaits discovery. Epipactis veratrifolia is a terrestrial orchid that has been reported to be pollinated by various species of hoverflies in Israel1,2. This orchid is known to emit the smell of aphid pheromone that attracts hoverflies, which lay eggs inside the flower and in the process pollinate them. Recently, we observed a species of hoverfly (Ischiodon scutellaris) pollinate the same orchid species in the Western Himalaya while laying eggs inside the flowers. Ischiodon scutellaris is being reported for the first time as pollinator of this orchid. However, all flowers don’t get pollinated, even though insects visit them and lay eggs... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Plant Biology; Evolutionary Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6295/version/1 |
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| Gregory A. Carter; G. Alan Criss; Gabriel A. Blossom; Patrick D. Biber. |
| Seagrasses provide habitat for a wide variety of aquatic species, and reduce coastal erosion via sediment stabilization. The areal coverage of seagrass beds on the Mississippi barrier islands appears to have declined substantially since the 1960s. However, difficulties in sampling benthic vegetation, differences among previous studies in survey methods, and a lack of data on year-to-year variation in coverage have impeded quantitative study of this decline. Thus, the goal of the present study was to utilize historical remote sensing data to quantitatively determine changes in seagrass (predominantly Halodule wrightii Ascherson) coverage on the Mississippi barrier islands. Analyses were limited to imagery acquired during late summer through autumn, when... |
| Tipo: Poster |
Palavras-chave: Ecology; Earth & Environment; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3669/version/1 |
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| Kim Hughes; Amy Verhoeven; Alex Kokula. |
| Background/Question/Methods:
Evergreen plants, growing in seasonally cold environments, must cope with a severe imbalance between light absorption and its utilization, as low temperatures during winter inhibit photosynthetic carbon reduction. In such conditions photoprotective mechanisms are critical, including the leaf antioxidant systems of plants. In a previous study examining _Taxus cuspidata_, we found significant increases in the enzyme glutathione reductase (GR) and the metabolite glutathione (GSH) during winter, but no increases in the enzymes superoxide dismutase, ascorbate peroxidase (APX) or the metabolite ascorbate (ASC). These results led to the hypothesis that GR and GSH serve an important role during winter stress that was... |
| Tipo: Poster |
Palavras-chave: Earth & Environment; Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5324/version/1 |
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| David W. Inouye. |
| Symposium title: Interdisciplinary Canary: Linkages between Ecology and Sustainable Decision Making in a Dynamic Environment

*1) Background/Question/Methods*
The responses of pollinators to climate change could include changes in phenology of migratory pollinators and in the routes or destinations for their migration, changes in the phenology and distribution of non-migratory species, and changes in the host plants they visit for nectar and pollen. Plants face similar challenges with regard to changes in their distributions, their reproductive phenology, and interactions with both co-flowering species and pollinators (competition, facilitation, etc.). Unless pollinators and their host plants are... |
| Tipo: Presentation |
Palavras-chave: Ecology; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3583/version/1 |
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| Joe N. Perry. |
| There are several challenges in the monitoring of: (1) long-term effects of GM plants on the environment, and (2) effects that may be small in terms population change but significant in terms of the conservation of biodiversity. The difficulties are compounded by variability in environmental conditions between sites and years. Some examples will be given from the Farm Scale Evaluations of GMHT crops in the UK. However, the talk will focus on more recent developments, including:
(1)	LandsFACTS software developed during the SIGMEA project for modeling rotations that might be used in risk management 
(see... |
| Tipo: Presentation |
Palavras-chave: Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4463/version/1 |
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| sanchita gupta; sunita singh dhawan; ashok sharma. |
| The gene expression data was studied in order to analyze genes involved in different abiotic stresses in solanaceous plants. Salt, temperature (heat & cold) and drought are the main abiotic stresses to the plants. Abiotic stress responses are important for sessile organisms like plants because they have to cope with environmental changes to survive. The idea was to analyze those differentially expressed genes, which show common expression in response to different abiotic stress conditions in each plant. Mitogen activated protein kinases (MAPK) are important mediators in signal transmission, connecting the perception of external stimuli to cellular responses. In plants, MAPKs plays a major role in the signaling of abiotic stresses. The expression... |
| Tipo: Poster |
Palavras-chave: Bioinformatics; Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6717/version/1 |
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| Rajarshi K. Gaur; G.P Rao; Axel Lehrer. |
| A luteovirus was found associated with midrib yellowing symptoms of sugarcane in India. The virus was earlier identified as sugarcane yellow leaf virus (SCYLV) on the basis of particle morphology and serological relationships. In this study, we attempted molecular characterization of an Indian isolate of SCYLV through reverse trascriptase-polymerase chain reaction (RT-PCR). Comparison showed that the deduced amino acid sequence share 98% homology with an isolate from Texas (cultivar CC85-964) and 100% homology with corresponding sequences of an Australian isolate of SCYLV (found in cultivar CP 65-357). Phylogenetic analysis also suggests that the coat protein of the SCYLV genome possesses different taxonomic affinities with other members of the family... |
| Tipo: Manuscript |
Palavras-chave: Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3388/version/1 |
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| Registros recuperados: 241 | |
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