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| Registros recuperados: 241 | |
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| Vincent Obade; Eva Clercq. |
| Monitoring the distribution of wild animals using appropriate methods and survey techniques is essential not only for sustainable management but also to avoid wastage of resources. This study applied remote sensing to investigate the factors influencing the distribution of herbivores in Nairobi National Park, Kenya. Impala was selected as indicator specie for the herbivores within the park, because the population of impala had drastically reduced over time. The influence of food availability, water and disturbance on herbivore presence was investigated. A positive significant statistical relationship between impala population density and feed availability was observed. However, the correlation between impala population density and water distance was... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3799/version/1 |
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| Chalapathy K. Reddy; Vishal V. Naole. |
| Jatropha seed and oil yield is function of planting material used, growing conditions, plant architecture development and maintenance. Jatropha is hardy plant; thrives well in arid and semi arid regions with an average rainfall ranging from 500 to 1200 mm. It has been planted in varied soil types, marginal and waste lands; where in utilization of in situ resources by agronomic practices and development and management of canopy by pruning are very crucial for harvesting higher seed for biodiesel production. Building ideal canopy by pruning during first growing season is very important. Pruning is done during winter season when plants are in dormant condition. |
| Tipo: Manuscript |
Palavras-chave: Developmental Biology; Earth & Environment; Plant Biology; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3700/version/1 |
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| Raju Karthic; Sundaram Seshadri. |
| Present experiment was designed with an objective to develop a cost efficient mass multiplication method for Gymnema sylvestre using hydroponic system. A plastic tub, with polyethylene cover, containing 1/10 strength of MS salts supplemented with Indole butyric acid (IBA) at different concentrations (0.5, 1.0, 2.5 mg/L) was studied. Medium containing 0.5mg/L of IBA produced highest rooting (66%) with 96 % survival. This protocol will serve as an alternative to the existing in vitro and clonal multiplication protocols. |
| Tipo: Manuscript |
Palavras-chave: Biotechnology; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3770/version/1 |
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| Richard J. Norby; Jeffrey M. Warren; Colleen M. Iversen; Charles T. Garten; Belinda E. Medlyn; Ross E. McMurtrie. |
| Stimulation of terrestrial productivity by rising CO~2~ concentration is projected to reduce the airborne fraction of anthropogenic CO~2~ emissions; coupled climate-carbon (C) cycle models, including those used in the IPCC Fourth Assessment Report (AR4), are sensitive to this negative feedback on atmospheric CO~2~^1^. The representation of the so-called CO~2~ fertilization effect in the 11 models used in AR4 and subsequent models^2,3^ was broadly consistent with experimental evidence from four free-air CO~2~ enrichment (FACE) experiments, which indicated that net primary productivity (NPP) of forests was increased by 23 +/- 2% in response to atmospheric CO~2~ enrichment to 550 ppm^4^. Substantial uncertainty remains, however, because of the expectation... |
| Tipo: Manuscript |
Palavras-chave: Earth & Environment; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3747/version/1 |
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| Abdelghani Chakhchar; Abderrahim Ferradous; Mouna Lamaoui; Said Wahbi; Cherkaoui El Modafar. |
| _Argania spinosa_ L. Skell, a tree endemic of Morocco, grows in semiarid and arid areas. Biochemical response to drought in four ecotypes of the _A. spinosa_ was compared. Choice of ecotypes was based on evident differences in geographical features in south-west Morocco: two coastal ecotypes (Essaouira and Agadir) and two paralittorale ecotypes (Aoulouz and Lakhssas). Lipid peroxidation (malonyldialdehyde (MDA)), content of endogenous hydrogen peroxide (H2O2) and antioxidant enzyme system (Catalase (CAT), Ascorbate peroxidase (APX), Total peroxidase (POD) and Polyphenoloxidase (PPO) were measured in control (100% relative humidity (RH) at field capacity (FC)) and water-stressed plants (50 and 25% RH at FC). For all ecotypes, drought stress significantly... |
| Tipo: Poster |
Palavras-chave: Biotechnology; Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6189/version/1 |
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| Amanda Benbow; Kelly G. Lyons. |
| KR Bluestem (_Bothriochloa ischaemum_) is a non-indigenous, invasive, C4 grass that was introduced throughout the Midwestern and Southwestern U.S. short- to midgrass prairies with the aim of improving degraded rangelands. The aggressive nature of KR bluestem has led to dramatic alterations of natural and managed ecosystems. Comparative studies of decomposition often show that non-indigenous, invasive plant species have higher rates of nutrient cycling than indigenous species; however, KR bluestem appears to deviate from this trend. Large amounts of litter are observed in KR-dominated grasslands as compared to intact native grasslands, suggesting that the species has a relatively lower decomposition rate and may slow nutrient cycling in these systems.... |
| Tipo: Presentation |
Palavras-chave: Ecology; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3614/version/1 |
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| Albert Liptay; Ron A. Salzman; Jerry H. Stoller; Michael D. Orzolek. |
| Flower formation in the Cucurbitaceae family is compromised at high temperatures; both male and female flowers and therefore fruit productivity are greatly reduced as the growing temperatures for these vegetable crops are increased above 26C. This intractable phenomenon has been documented both with outdoor field experiments at various latitudes on the eastern seaboard in the USA and in a laboratory, temperature-regulated setting. We now report that an agricultural product, FP, which has been, and is used globally on many commercial crops to increase flower number and strength during blossom formation and development, overcomes the apparent refractory floral initiation and development at high temperatures. This is a new and unexpected finding.... |
| Tipo: Manuscript |
Palavras-chave: Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3707/version/1 |
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| Edgard Bontempo e Silva; Toshihiko Hara; Akihiro Sumida; Kiyomi Ono. |
| Background/Question/Methods 
_Abies sachalinensis_ (Sakhalin Fir) and _Picea glehnii_ (Glehn’s Spruce) are major components of the sub-boreal forests of Hokkaido, Japan. Similar Spruce-Fir forests can be found in many other places in the northern hemisphere and will probably be impacted by global warming. Therefore, detailed knowledge of these species’ physiology and life-history strategies at different growth stages is important to understand present communities and to support reliable prediction of possible consequences of global climate change. 
Accordingly, the objective of this study was to establish relations between community dynamics, life-history strategies and photosynthetic adaptation of... |
| Tipo: Poster |
Palavras-chave: Ecology; Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5298/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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| Harinder P. S. Makkar; Vikas Kumar; Olubisi Oyeleye; Akinwale Oluwasegun Akinleye; Miguel A. Angulo-Escalante; Klaus Becker. |
| The seeds of _Jatropha platyphylla_, available on the pacific coast from Sinaloa to Michoacán including the Nayarit and Jalisco states in Mexico, are consumed by local communities after roasting them in a manner similar to that used for peanuts. The kernels and kernel meal of _J. platyphylla_ were found to be free of phorbol esters but the kernel meal contained antinutritional factors: trypsin inhibitor, lectins and phytate at levels similar to those in _J. curcas_ kernel meal. However, trypsin inhibitor and lectins are heat labile so this explains why the local people can eat roasted seeds without ill effect. The fatty acid profile of _J. platyphylla_ oil was similar to that of _J. curcas_ and the kernels of both these species contained _ca_ 58%... |
| Tipo: Manuscript |
Palavras-chave: Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4155/version/1 |
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| Angela Zeng; Roberto Salguero-Gomez; Agustin Santos-Alvarez; Amy Zanne; Brenda Casper. |
| High temperatures and nutrient limitations in deserts challenge plant survival. Large temperature oscillations and droughts typical of cold deserts can result in cavitation, the precipitation of dissolved air within a xylem vessel. If xylem vessels are closely packed, then a cavitation event may expand to neighboring vessels, resulting in runaway embolism, and potentially paralyze the vital functions of the plant.
 Hydraulic sectoriality, where the plant is functionally composed of independent hydraulic units, has been suggested as a strategy to decrease the risk associated with cavitation. This can occur by increasing xylem vessel isolation and/or increasing the physical modularity of the plant. Furthermore, hydraulic sectoriality... |
| Tipo: Poster |
Palavras-chave: Ecology; Plant Biology; Evolutionary Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5277/version/1 |
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| Alain Steinmann; Kristin Entzian; Birgit Grümmer; Udo Meyer. |
| Technical advances in biotechnology lead to a rising number of genetically modified plants and derived food and feed. Therefore, the international interest in adequate and standardized analytical methods increases to assess health risks in a rapid and low cost manner.
To address this issue a decision support system (DSS), which will be based on baseline data and thresholds of key parameters, is going to be established in the framework of a joint project (BioOK). Determination of the potential allergenicity or toxicity of novel proteins caused by the genetic modification compared to near isogenic variants (NIV) is a key issue in this context. For the development of DSS the model plant “potato” was used to compare... |
| Tipo: Poster |
Palavras-chave: Biotechnology; Plant Biology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4441/version/1 |
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| Diego Mauricio Riaño-Pachón; Luiz Gustavo Guedes Correa; Bernd Mueller-Roeber. |
| PlnTFDB is a publicly available computational resource comprising putative complete sets of transcription factors from plants. The original database listed the putative complete sets of TFs from five different green plant (viridiplantae) species. Up to date, summer 2007, PlnTFDB have had more than one hundred thousand hits from more than one thousand different clients, showing the importance that this resource had acquired for the plant community. In this first major update, we extended the coverage of the database to additional completed viridiplantae genomes, i.e., the moss _Physcomitrella patens_ and the rice _Oryza sativa_ spp _indica_. The scope of PlnTFDB was broadened to encompass other eukaryote photosynthetic organisms, such as the rhodophyte... |
| Tipo: Poster |
Palavras-chave: Ecology; Bioinformatics; Plant Biology. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1094/version/1 |
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| Rangareddygari Manohar Reddy; Ramkumar -. |
| The soils of tropical tasar plantation fields in general are sloppy and are primarily deficient of nutrition due to top soil erosion and constant leaf productivity exploitation to rear tasar silk insect, Antheraea mylitta Drury. The rainfed field of Terminalia tomentosa (W&A) plantation has been evaluated for soil fortification with green mulching through legumes, Sun hemp (Crotalaria juncea), Daincha (Sesbania aculeata), Green gram (Vigna radiatus) and Black gram (Vigna mungo) during rainy season. The mulching has enhanced the water holding, moisture retention, electrical conductivity, organic carbon, nitrogen (N) and potassium (K) and reduced the bulk density and pore space of soil. Among the legumes, Sun hemp has shown higher improvement of... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment; Plant Biology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6388/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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| Isaak Y. Tecle; Naama Menda; Robert Buels; Lukas Mueller. |
| Quantitative trait loci (QTL) analysis is used to dissect the genetic basis underlying polygenic traits. Several public databases have been storing and making QTL data available to research communities. To our knowledge, current QTL databases rely on manual curation where curators read literature and extract relevant QTL information to store in databases. Evidently, this approach is expensive in terms of expert manpower and time use and limits the type of data that can be curated. At the Solanaceae Genomics Network (SGN) ("http://sgn.cornell.edu":http://sgn.cornell.edu), we have developed a database to store raw phenotype and genotype data from QTL studies, perform, on the fly, QTL analysis using R/QTL statistical software... |
| Tipo: Poster |
Palavras-chave: Genetics & Genomics; Bioinformatics; Plant Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3160/version/1 |
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| Registros recuperados: 241 | |
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