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1.
Maize is arguably the most widely grown crop in the world, but it is often associated with one of its major insect pests, the European corn borer (ECB). The damage caused by this species to maize production is generally variable, but in many cases it is economically significant. This review paper provides an overview of the research findings on the natural plant defence mechanisms against ECB larvae published till now. What is resistance and how it is achieved, what is the chemical response of maize plants to insect feeding and how tolerance can be increased. A short introduction in breeding for resistance and a discussion if the mentioned traits can be used in conventional breeding in order to create maize hybrids less affected by ECB are given.  相似文献   
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Use of varieties bred under organic conditions is essential in order to minimize the yield gap between organic and conventional agriculture. The aim of this study was to analyse research publications related to the topic ‘organic plant breeding’ from the Web of Science database using bibliometric science mapping and visualization tools. The number of analysed documents in the bibliographic dataset was 204 from the 53 sources. The overall trend in the organic plant breeding literature showed that the number of publications increased during the observed time-span. We found that in total, 65 countries and 337 institutions are active in the field of organic plant breeding with a high degree of international collaboration. The top five countries according to the number of publications were the United States, Italy, Germany, France, and Canada, while the most active institutions were Wageningen University, Iowa State University, University of Alberta, University of Copenhagen, and University of Hohenheim. All keywords from the organic plant breeding research in the agronomy category were separated into seven clusters for different research topics. Although there is evident progress viewed through the increased trend in the number of publications, organic plant breeding needs further expansion and development. This is especially through the implementation of novel plant breeding techniques and methods aiming to improve traits that are highly specific to organic conditions.  相似文献   
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Numerous plants ofSilene nicaeensis having symptoms resembling those associated with the presence of phytoplasmas were observed in an extensive coastal area in the south of Italy. Microscopic observation showed histological abnormalities in the organization of tissues in symptomatic plants, and molecular tests, including PCR/RFLP analyses and nucleic acid sequencing, revealed the presence of phytoplasmas belonging to the aster yellows group (‘Candidatus phytoplasma asteris’). This is the first report of phytoplasma infection inS. nicaeensis, a wild species that colonizes the Calabrian coast. http://www.phytoparasitica.org posting June 12, 2008  相似文献   
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Transplantation of mussels to new aquaculture sites is currently being undertaken in Istria (Croatia) to increase production, minimize potential seasonal urban contamination, and secure safer seafood products. The purpose of this study was to determine the effects of season and transplantation on physiological indices (condition index and meat yield) of mussels, Mytilus galloprovincialis. Mussels were obtained from five aquaculture areas in Istria (central Lim Bay, Ra?a, Budava, Vabriga, and Pomer) and moved to a reference site in inner Lim Bay from April to July. Results showed that both season and transplantation affected physiological indices of mussels. Higher physiological indices were found in cultivated mussels from all areas in summer compared to spring, except in mussels from Vabriga and Pomer. In addition, higher physiological indices were found in mussels transplanted from central Lim Bay to the reference site in inner Lim Bay. Transplantation negatively affected physiological indices of mussels from Vabriga and Pomer, with no change in mussels from Ra?a and Budava. In conclusion, mussels from all areas exhibit satisfactory commercial results (≥15%) during the peak summer harvesting season. For most transplanted mussels, transplantation itself represents additional stress, bringing into focus adaptation processes, stock genetics, and favorable ecological conditions.  相似文献   
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Epithelial cells respond to physicochemical damage with up-regulation of major histocompatibility complex-like ligands that can activate the cytolytic potential of neighboring intraepithelial T cells by binding the activating receptor, NKG2D. The systemic implications of this lymphoid stress-surveillance response, however, are unknown. We found that antigens encountered at the same time as cutaneous epithelial stress induced strong primary and secondary systemic, T helper 2 (T(H)2)-associated atopic responses in mice. These responses required NKG2D-dependent communication between dysregulated epithelial cells and tissue-associated lymphoid cells. These data are germane to uncertainty over the afferent induction of T(H)2 responses and provide a molecular framework for considering atopy as an important component of the response to tissue damage and carcinogenesis.  相似文献   
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An overview on the diversity of 39 lectins from the phylum Porifera is presented, including 38 lectins, which were identified from the class of demosponges, and one lectin from the class of hexactinellida. Their purification from crude extracts was mainly performed by using affinity chromatography and gel filtration techniques. Other protocols were also developed in order to collect and study sponge lectins, including screening of sponge genomes and expression in heterologous bacterial systems. The characterization of the lectins was performed by Edman degradation or mass spectrometry. Regarding their physiological roles, sponge lectins showed to be involved in morphogenesis and cell interaction, biomineralization and spiculogenesis, as well as host defense mechanisms and potentially in the association between the sponge and its microorganisms. In addition, these lectins exhibited a broad range of bioactivities, including modulation of inflammatory response, antimicrobial and cytotoxic activities, as well as anticancer and neuromodulatory activity. In view of their potential pharmacological applications, sponge lectins constitute promising molecules of biotechnological interest.  相似文献   
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This paper deals with a common urban forestry problem: selecting the most appropriate management policy for a forest situated within a city zone. In the presented case study, we analyzed this problem within the Zvezdarska forest in Belgrade, Serbia. The decision makers that took part in the decision making process represented the two main stakeholder groups – the public and the experts. The public group is divided into three different subgroups: local residents, tourists and environmentalists. The experts group is represented by local authorities and academic experts. The procedure implemented for evaluating and selecting the most desired management policy for the case study area combines approval voting and the multicriteria approval method, two social choice theory methods suitable for decision-making in forestry. The main reason for combining these techniques is to be sure that the selected policy will be accepted as the most desired option by both the public and the experts. The results and discussions with involved decision makers clearly show that the applied procedure possesses sufficient analyticity and full transparency in the decision-making process; hence it is applicable to problems in urban forest management as well as to natural resources in general.  相似文献   
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Large-flowered vetch (Vicia grandiflora Scop.) is widely present in many Eurasian wild floras, where it has significance in improving grassland communities and environment-friendly uses as a cover crop and green manure. The main goal of this study was to assess the possibility of transforming large-flowered vetch into a field crop and assess the basics for its breeding. A small-plot trial was carried out in three consecutive growing seasons 2005–2008 in Novi Sad, including twelve large-flowered wild populations collected at various sites in Serbia and France from 2002 to 2004 and multiplied ex situ during subsequent years. The population MM 02/01 of Serbian origin had the highest three-year average proportion of plants surviving winter (0.96). The smallest average number of days from sowing to first flower was in the population MM 03/10 (199 days). The population MM 03/08 produced the highest forage dry matter (8.0 Mg ha?1) yield stage between full flowering and forming first pods. The highest seed yield was in the population MM 03/10 (2,084 kg ha?1). Forage dry matter yield was significantly correlated to main stem length (r = 0.932), number of fertile nodes (r = 0.710), number of internodes (r = 0.640) and number of leaves (r = 0.604). Seed yield was significantly correlated to number of pods (r = 0.930), number of seeds (r = 0.883), number of stems (r = 0.882) and number of fertile nodes (r = 0.768). Our study confirmed that large-flowered vetch may represent a stable and quality source of forage in temperate regions such as the Balkans, as well as that it may have its place in various crop rotations and farming systems. At the same time, the existing phenotypic variability offers a solid basis for further improvement of this species.  相似文献   
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