检索结果-南通市图书馆

Mode of Managing Nutrient Solution Based on N Use Efficiency for Lettuce （Lactuca sativa L.）

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Food Science and engineer.ng 2017年第1期7卷 29-37页

作者： Ibraimo Teleha Chabite Zhang Lei Yao Ningning Fu Qiang Yu Haiye College of Biological and Agrieultural engineer.ng Jilin University Changchun 130022 China Key Laboratory of Bionic engineer Ministry of Education Jilin University Changchun 130022 China Laboratory of Quality and Food Safety University of Lurio Nampula 364 Mozambique

In aeroponic cultivation the nutrient solution is an essential component to achieve good production results. And nitrogen is the main constituent element of the nutrient solution and essential element in plant nutrition. Therefore, the management and monitoring nutrient solution and existing nitrogen is fundamental. The experiment shows that three modes of replacing the nutrient solution and three initial pH values and their interaction significantly influenced the fresh weight and dry matter of lettuce. The highest values of fresh and dry weight were recorded in the fifth treatment where there is an interaction between pH 6 and the mode of replacing half of the nutrient solution. The consumption rate of nitrate nitrogen （NOa-N）, ammonium nitrogen （NH4-N） and gross nitrogen （GN） was higher during stage 1 （10 days after transplanting）, especially for the mode of complete replacing nutrient solution.

关键词： Lettuce aeroponic nitrogen nutrient solution consumption.

The Arabidopsis pattern recognition receptor EFR enhances fire blight resistance in apple

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Horticulture Research 2021年第1期8卷 2615-2623页

作者： Stefano Piazza Manuela Campa Valerio Pompili Lorenza Dalla Costa Umberto Salvagnin Vladimir Nekrasov Cyril Zipfel Mickael Malnoy Research and Innovation Centre Fondazione Edmund MachSan Michele a/AdigeItaly Genetics Department Faculty of AgriSciencesStellenbosch UniversityStellenboschSouth Africa The Sainsbury Laboratory University of East AngliaNorwichUnited Kingdom Institute of plant and Microbial Biology and Zurich-Basel plant Science Center University of ZurichZurichSwitzerland Present address:plant Sciences Department Rothamsted ResearchHarpendenUK

Fire blight disease,caused by the bacterium Erwinia amylovora(***),is responsible for substantial losses in cultivated apples *** important mechanism of plant immunity is based on the recognition of conserved microbial molecules,named pathogen-associated or microbe-associated molecular patterns(PAMPs or MAMPs),through pattern recognition receptors(PRRs),leading to pattern-triggered immunity(PTI).The interspecies transfer of PRRs represents a promising strategy to engineer.broad-spectrum and durable disease resistance in ***,the Arabidopsis thaliana PRR for the PAMP elf18 derived from the elongation factor thermal unstable(EF-Tu)proved to be effective in improving bacterial resistance when expressed into Solanaceae and other plant *** this study,we tested whether EFR can affect the interaction of apple with *** by its ectopic expression in the susceptible apple rootstock *** EFR expression led to the activation of PAMP-triggered immune response in apple leaves upon treatment with supernatant of ***,as measured by the production of reactive oxygen species and the induction of known defense *** amount of tissue necrosis associated with *** infection was significantly reduced in the EFR transgenic rootstock compared to the *** results show that the expression of EFR in apple rootstock may be a valuable biotechnology strategy to improve the resistance of apple to fire blight.

关键词： blight resistance pattern

Bacillus thuringiensis and its use to engineer.insect resistance in crops

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Bacillus thuringiensis and its use to engineer insect resist...

The regulatory effect of pyruvate orthophosphate dikinase (PPDK) on the maize C4 photosynthesis

International Conference:Technology Transfer in Biological Control:From Research to Practice

作者： Jeroen VAN RIE plant Genetic Systems Jozef Plateaustraat 22B-9000 GentBelgium

＜正＞Bacillus thuringiensis has been used for more than two decades as an effective and safe microbiological *** insecticidal activity is mainly due to the production of 5-endotoxins or insecticidal crystal proteins （ICPs） during *** ICPs known today are active towards larvae of lepidopteran,coleopteran or dipteran *** mode of action of ICPs

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The regulatory effect of pyruvate orthophosphate dikinase (P...

A Pioneer in Technology Research Pursuing His Dream in the Oilfield

中国遗传学会第九次全国会员代表大会暨学术研讨会

作者： Pinghua Li Yanyan Liu Fuquan Gong Rita Giuliani Wagner L.Araujo Lauren Dedow Thomas P.Brutnell Institute of Tropical Biosciences & Biotechnology Chinese Academy of Tropical Agriculture Sciences College of plant Science & technology Huazhong Agriculture University College of Agriculture Hainan University School of Biological Sciences Molecular Plant SciencesWashington State University Max-Planck-lnstitute of Molecular plant Physiology Boyce Thompson Institute Cornell University

C4 plants,like maize,display a higher photosynthetic efficiency,lower CO compensation point and reduced photorespiration relative to C plants under hot,dry conditions These benefits provide C crops with a distinct growth advantage,better water use efficiency and higher rates of biomass *** important aim of our current research is gain a deeper understanding of the mechanisms that regulate C *** application of this work would be to engineer.C crops with C traits thus improving *** orthophosphate dikinase(PPDK) is a key and rate-limiting enzyme in maize C photosynthesis,which catalyzes the regeneration of the substrate phosphoenolpyruvate(PEP) for assimilation of CO by PEP *** the biochemical function of PPDK is well understood,little is known of the transcriptional network regulating *** this study,we characterized several transposon insertions in the maize PPDK *** detailed histological,physiological and molecular analyses(RNA-seq,GC-MS) we explore the PPDK regulatory network and examine the physiological consequences of a loss of PPDK function.

关键词： Pyurvate orthophosphate dikinase maize C4 photosynthesis RNA-seq

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

China Oil & Gas 2020年第4期27卷 11-12页

作者： Wu Chunsheng Oil Production Technology Research Institute No.10 Oil Production Plant of PetroChina Changqing Oilfield Company

Wu Chunsheng is a senior engineer.of oil and gas field development,and the deputy director of the Oil Production Technology Research Institute of the No.10 Oil Production plant of PetroChina Changqing Oilfield *** has devoted himself to working in the field of oilfield development technology since the very beginning of his *** the period of"Building a Western Daqing Oilfield"and the"Second Round of Development Acceleration"in Changqing Oilfield,he worked hard and studied diligently,and took the initiative to take on responsibilities while focused on practical work,growing into an outstanding young technical cadre step by *** achievements in the research,application,promotion of new techniques and technologies,and the application of scientific research results proved extraordinary.

关键词： Pioneer devoted promotion

Native Aquatic plant Establishment Efforts in a High-Herbivore, Central Texas Reservoir

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Water Resource and Protection 2021年第12期13卷 1024-1042页

作者： Aaron N. Schad Brent J. Bellinger Lynde L. Dodd Jacob Kelly Kristina Hellinghausen Gary O. Dick Samuel F. Atkinson Environmental Lab US Army Engineer Research and Development Center Vicksburg MS USA Watershed Protection Austin TX USA Oak Ridge Institute for Science and Education Oak Ridge TN USA Univeristy of North Texas Denton TX USA

Maintaining beneficial, native plant structure and diversity while reducing invasive, nuisance species dominance is an important management domain for natural resource managers. One such vegetation component in North American lakes and reservoirs is submerged aquatic vegetation—a valuable aquatic resource which serves as productive habitat for fish, aquatic macroinvertebrates, and other wildlife. Reservoirs in the southern parts of the United States have experienced varying aquatic plant dominance dynamics due to historical water resource management actions, including drawdowns and introduction of herbivorous fish for the purpose of controlling invasive aquatic vegetation. Some of these management options have also been detrimental to native submerged aquatic vegetation. This paper explores an adaptive management research effort by installing herbivore-protected, fenced-pen submerged aquatic vegetation sites in a high-herbivore reservoir to determine effectiveness of protecting habitat and serving as founder colony sources for propagule spread. Four experimental sites with three management treatments each were planted with American eelgrass. Each site utilized one un-fenced treatment and two treatments with varying mesh sizes for protective fencing-pens. Site integrity, species survival and spread, and grazing were documented. One additional site was installed and planted with other native submerged aquatic vegetation species for nominal species performance descriptions. No plants survived unprotected in the high-herbivore system and plants, in general, performed consistently better within the smaller mesh size. These test planting results were ultimately used to inform adaptive management decision making for plant installation and expansion designs for managing reservoirs invested with Hydrilla, considered one of the most serious invasive aquatic plants in the United States.

关键词： Invasive Species Submerged Aquatic Vegetation Aquatic plant Restoration Adaptive Aquatic plant Management Herbivory Grass Carp

Runoff Management, Wetland Hydrology, and Biodiversity Relations in Minnesota＇s Red River Basin Wetlands

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Science and engineer.ng(A) 2012年第1期1卷 107-124页

作者： StevenI．Apfelbaum John. D. Eppicht James A. Solstada Applied Ecological Services Inc. Chairman/Founder and Senior Ecologist Wisconsin 53520 USA Waterflow Consultants Environmental Engineer Illinois 61820 USA Minnesota Department of Natural Resources Division of Waters Technical Analysis Program Hydrologist Minnesota 55155USA

The authors assessed if wetlands can contribute to flood damage reduction in the Red River Basin, Minnesota, by providing reliable flood water storage. Hydrology and biodiversity in 28 natural and restored wetlands suggested uncontrolled natural wetlands provided the highest mean annual flood storage at 15 cm of runoff while single and 2-stage outlet controlled wetlands provided 3.0 and 8.1 cm of runoff control. Natural controlled wetlands, followed by 2-stage and single stage outlet controlled restorations provided 10.2, 6.6, and 2.2 cm of storage for early summer storm events. Two years of recorded water levels and a 20-year continuous meteorological record were used to model ＂temporary water level increases＂ in each wetland. Species diversity, hydrology, and watershed land use variables are inversely related where high quality and diverse wetlands had the lowest amplitude and frequency of water level increases, while low quality wetlands had the highest. Uncontrolled natural wetlands had the highest biological diversity and the lowest frequency and magnitude of temporary water levels increased. A significant biodiversity declines were measured where water level increases were greater than 2.7 meters. Strong multi-linear relationships between watershed land uses and watershed/wetland ratio explained wetland hydraulic performance and biodiversity relations （r2 ranging from 0.6-0.8）. Non-native wetland plant diversity increased with greater water level dynamics.

关键词： Diversity and hydrology floodwater in wetlands water level dynamics.

Ecology of Insect Rearing Systems: A Mini-Review of Insect Rearing Papers from 1906-2017

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Entomology 2018年第2期6卷 86-115页

作者： Allen Carson Cohen Insect Rearing Education & Research Program Department of Entomology and Plant Pathology North Carolina State University Raleigh North Carolina USA

Hundreds of billions of insects are produced each year in insectaries or laboratories. These insects are reared for programs of pest control, as feed, for production of various products such as textiles and food, for research and education, among many purposes. The concept is advanced here that rearing conditions are expected to simulate the natural environments from which target insects are derived. Simply speaking, the rearing container and rearing facility are the insect’s microhabitat and its overall environment. Therefore, the central premise of this paper is that rearing systems are human-made ecosystems. If our expectations are to be met, that reared insects are healthy, fit, and of high quality—simulating their wild counterparts, rearing personnel must engineer.conditions that meet all the insects’ needs. In this review, major advancements and progress are documented within the context of the ecology involved in artificial rearing technology. In this review, attention is paid to the food, environmental factors (temperature, humidity or water—in the case of aquatic insects—lighting, gas exchange, and soil—for soil-inhabiting insects), containment, and some special features of rearing systems that were designed to meet special needs of a target insect’s biology. Because there are thousands of publications on rearing advancements, the focus is on publications that had the strongest influence on modern day insect rearing systems, as well as papers that represent historically novel rearing concepts. Where the chain of information is missing on how or from where rearing innovations were derived, papers are referenced as documentation of the various rearing system features.

关键词： Rearing Microclimate Feeding Systems Containers Genetic and Microbial Relations Domestication

plant viruses as probes to engineer.tolerance to abiotic stress in crops

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stress Biology 2022年第1期2卷 440-444页

作者： Emmanuel Aguilar Rosa Lozano-Duran Shanghai Center for plant Stress Biology Chinese Academy of SciencesShanghai 201602China Center for Excellence in Molecular plant Science Chinese Academy of SciencesBeijingChina Departamento de Biología Celular Genética y FisiologíaInstituto de Hortofruticultura Subtropical y Mediterránea“La Mayora”Universidad de Málaga-Consejo Superior de Investigaciones Científicas(IHSM-UMA-CSIC)Universidad de MálagaCampus Teatinos29071 MálagaSpain Department of plant Biochemistry Centre for Plant Molecular Biology(ZMBP)Eberhard Karls UniversityD-72076 TübingenGermany

Main text plants,as sessile organisms,have to deploy a vast array of mechanisms to cope with the always-changing environmental conditions that surround *** increasing accumulation of greenhouse gases in the atmosphere in the last century is responsible for a global warming of which the effects are predicted to be magnified in the near future.

关键词： plants plant crops