Xem 1-20 trên 132 kết quả Stress tolerance
  • Salinity stress negatively impacts agricultural yield throughout the world affecting production whether it is for subsistence or economic gain. The plant response to salinity consists of numerous processes that must function in coordination to alleviate both cellular hyperosmolarity and ion disequilibrium. In addition, crop plants must be capable of satisfactory biomass production in a saline environment (yield stability).

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  • Growth and productivity of higher plants are adversely affected by various environmental stresses which are of two main types, biotic and abiotic, depending on the source of stress. Broad range of abiotic stresses includes osmotic stress caused by drought, salinity, high or low temperatures, freezing, or flooding, as well as ionic, nutrient, or metal stresses, and others caused by mechanical factors, light, or radiation.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: The Arabidopsis pop2-1 mutant reveals the involvement of GABA transaminase in salt stress tolerance

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  • Mechanisms of salt tolerance in halophytes: can crop plants resistance to salinity be improved? High concentrations of sodium are toxic to most plant species, making soil salinity a major abiotic stress in plant productivity world wide. Many crop species, which countless people rely for survival, are negatively affected.

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  • Over the past decade, our understanding of plant adaptation to environmental stress, including both constitutive and inducible determinants, has grown con- siderably. This book focuses on stress caused by the inanimate components of the environment associated with climatic, edaphic and physiographic factors that substantially limit plant growth and survival. Categorically these are abiotic stresses, which include drought, salinity, non-optimal temperatures and poor soil nutrition.

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  • Increasing attention has also been given to dissecting and understanding diversity in relation to genes underlying important agronomic traits in a number of crops. Molecular phylogenetics and genetic diversity analysis can help to clarify the taxonomic identity and evolutionary relationships of the wild relatives of crop species. These methods can also help prevent misidentification and carefully plan effective germplasm management strategies.

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  • Diapause embryos of the crustaceanArtemia franciscanaexhibit extreme stress tolerance, a property thought to involve molecular chaperones known as small heat shock proteins. To further explore this idea, the struc-ture, function and synthesis of ArHsp22, an Artemiasmall heat shock protein, were characterized.

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  • We reported earlier that ectopic expression of CAP2, a single AP2 domain containing transcription activator from chickpea (Cicer arietinum)in tobacco improves growth and development, and tolerance to dehydration and salt stress, of the transgenic plants.

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  • Plants are continuously affected by a variety of environmental factors. Whereas biotic environmental factors are other organisms such as symbionts, parasites, pathogens, herbivores, and competitors, abiotic factors include parameters and resources which determine plant growth like temperature, relative humidity, light, availability of water, mineral nutrients, and CO 2 , as well as wind, ionizing radiation, or pollutants (Schulze et al. 2002 ) . The effect each abiotic factor has on the plant depends on its quantity or intensity.

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  • Chlorophyll fluorescence represents an intrinsic signal emitted by plants that can be employed to monitor their physiological state including changes of the photosynthetic apparatus, developmental processes of leaves, state of health, stress events, stress tolerance, and also to detect diseases or nutrient deficiency of plants. In particular, the application of laser induced chlorophyll fluorescence spectroscopy has drawn much attention recently owing to the non-invasive and nondestructive nature of the technique (Svanberg, 1995; Lang & Lichtenthaler, 1991; Chappelle et al., 1984)....

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  • It usually looks at cash flow during the hold period of the investment plus the cash flow resulting from the ultimate disposition of the investment property. In these respects it is different from and more sophisticated than Tool Kit #2 Direct Capitalization, which usually limits its focus to annual net incomes without taking into account cash flow, appreciation in value, paying down of mortgages, or ultimate cash flow on disposition.

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  • We believe that it is interesting to study the system and software architecture of environments which integrate the evolving ideas of computational grids, distributed objects, web services, peer-to-peer networks and message oriented middleware. Such peer-to-peer (P2P) Grids should seamlessly integrate users to themselves and to resources which are also linked to each other. We can abstract such environments as a distributed system of “clients” which consist either of “users” or “resources” or proxies thereto.

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  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Rice Yellow Mottle Virus stress responsive genes from susceptible and tolerant rice genotypes

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  • Phototrophy is the process by which organisms trap photons and store energy as chemical energy in the form of adenosine triphosphate (ATP). ATP transports chemical energy within cells for metabolism. There are three major types of phototrophy: Oxygenic and Anoxygenic photosynthesis, and Rhodopsin-based phototrophy. Photosynthesis is a chemical process that converts carbon dioxide into different organic compounds using solar energy. Oxygenic and anoxygenic photosynthesis undergo different reactions in the presence and absence of light (called light and dark reactions, respectively).

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  • Because the insurance industry employs both captive and independent producers in its various models of product distribution, understanding the insurer-producer relationship is critical when determining the insurer’s responsibility for its appointed producers’ social media communications. As such, if the content of an appointed producer’s social media communication can be attributed to a specific carrier, regulators will also attribute the communication to the carrier.

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  • For the last 100 years, a health care regulatory project enthusiastically endorsed by generations of health policy experts has been encrusting U.S. health care with layer upon layer of increasingly intrusive regulation. Though each regulation may be innocuous in its own right, taken together they have had the unfortunate effect of divorcing patients from spending on their health, creating explosive growth in Wisconsin’s Medicaid budget, and making Wisconsin’s market for hospital services one of the least competitive in the United States.

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  • There are several differences between bamboo and wood. In bamboo, there are no rays or knots, which give bamboo a far more evenly distributed stresses throughout its length. Bamboo is a hollow tube, sometimes with thin walls, and consequently it is more difficult to join bamboo than pieces of wood. Bamboo does not contain the same chemical extractives as wood, and can therefore be glued very well [Jassen 1995].

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  • This guidance is not legally-binding. It represents a synthesis of the information and experience available to the Commission. It is intended as a summary of the current state of the art with respect to best practice on integrated environmental management. The guidance is not intended to be a rigid set of rules to be followed in all circumstances. The mere fact that there is so much diversity between cities across the EU means that no one solution is applicable nor appropriate for all situations.

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  • In terms of detail, the Cairns Group inter alia demands that payments under environmental programs should be less than the extra costs involved in complying. A controversial point could be that the EU’s environmental programs offer income foregone, additional costs as well as the financial incentive necessary to encourage farmers to make agri-environmental undertakings. The new suggestion brought forward by Cairns could thus be seen as an indicator that the Group is considering current practice, like by the EU, as too generous regarding the amount of the overall compensation.

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  • Subsidy rates range from 38% to 67% for policies using either “basic” units or “optional” units. Basic units cover all plantings in a single county of a crop with the same tenant/landlord. Optional units are basic units divided into smaller units by township section. As newly authorized under the 2008 farm bill, a higher subsidy rate (up to 80%) is provided for policies using enterprise units (all land for a single crop in a county, regardless of the tenant/landlord structure). Because the premium for policies using enterprise units is lower (i.e.

    pdf6p quaivatxanh 29-11-2012 26 4   Download

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