Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 78 for “"crop plants"”.
-
Understanding Plant Pathosystems in Wild Relatives of Cultivated Crop Plants
… surrounding sustainable agriculture. Static crop populations, containing little to no genetic diversity, are vulnerable to diverse pathogen populations. Wild relatives of crop plants are a reservoir for new disease resistance traits that can be introgressed into cultivated crops. The …
-
Amelioration of salinity toxicity in South African crop plants with special reference to maize
The effects of ammonium and nitrate nutrition on potassium uptake, photosynthetic gas exchange and growth responses to salinity stress (80 mM) together with the ameliorative roles of three ranges of calcium concentrations (2.5 to 12 mM, 1 to 8 mM and 0.5 to 5 mM) and one range of potassium …
-
A study of the effects of different rates of liming on soil reaction and growth of certain crop plants
… appears to be a definite relation between pH and crop yield. For each crop the yields increased up to a certain pH; beyond which they decreased again. The optimum pH for the crops grown in the experiment reported here are as follows; Alsike clover 5.8 Red clover 6.3 Sweet clover 6.5 Soybeans 6.3 …
-
Molecular characterisation of XvVTC2, a gene coding for a GDP-L-galactose phosphorylase from Xerophyta viscosa
… food security in the next 40 years. Resurrection plants can withstand highly variable and harsh climatic conditions. This makes them ideal candidates to elucidate possible mechanisms which can be used to adapt crop plants to tolerate variable climatic conditions associated with climate change.
-
Genetic Resources, Equity and International Law
… of international law to the uses of agricultural crop plants termed plant genetic resources for food and agriculture. In particular, it asks the question, does international law regulate the use of plant genetic resources for food and agriculture so as to enable equity among nations in accessing …
-
New hypotheses about the origin of Pseudomonas syringae crop pathogens
… bacterium that causes diseases on many crop plants. We hypothesized that today's highly virulent P. syringae crop pathogens with narrow host range might have evolved after the advent of agriculture from ancestral P. syringae strains with wide host range that were adapted to mixed plant …
-
The role of the vasculature in iron allocation and sensing in plants
… deficiencies, Fe is the most studied one in both plants and humans (1). This is because Fe serves as a cofactor in many critical biological processes and cellular redox reactions. Plants also require Fe for the synthesis of chlorophyll. Thus, Fe deficiency can lead to plant chlorosis and reduction …
-
Expression and Localization of Foreign Proteins in Soybean and Tobacco Seed Tissue
… lectin promoter. Soybean is one of several crop plants which are still difficult to transform even in the hands of plant transformation specialists. Transformation of soybean embryogenic suspension cultures was achieved via microprojectile bombardment method. Several independently …
-
Co-orthologs of KATANIN1 Impact Plant Morphology and Show Differential Evolution in Maize
Understanding how the size and shape of crop plants and their specific organs are genetically controlled may allow for the development of cultivars with improved plant architecture. A microtubule-severing enzyme called katanin p60 is encoded by KATANIN1 (KTN1) in Arabidopsis or by an ortholog, …
-
Effects of commercial kelp extract and plant growth regulators on growth of Gracilaria gracilis in culture
… a local commercial seaweed extract (Kelpak®) to crop plants has proven to be beneficial as it improves growth and yields. Its efficiency has been attributed to its production method that involves a cold process, resulting in a product containing significant amounts of plant growth regulators …
-
Efficacy of glufosinate and weed control in transformed corn and soybean
… that inhibits the glutamine synthetase enzyme in plants, causing an accumulation of ammonia, inhibition of photosynthesis, and ultimately plant death. The use of this herbicide has been limited to no-tillage prior to planting or in noncrop areas. Recent developments in gene transfer technology …
-
Response of corn to high levels of CuSO₄ and ZnSO₄ applications
Copper and Zn deficiencies of crop plants occur in various areas throughout the world. The sulfate forms of Cu and Zn are generally used to correct these micronutrient deficiencies. In agricultural practices, Cu and Zn are applied to soils not only as a fertilizer but also as manures, pesticides …
-
Soil microbial community dynamics associated with agricultural crops
… the interactions that occur between agricultural crops and microbial communities that reside in the soil. Soil microbes regulate the decomposition of organic matter, the cycling of nutrients to crops and can induce systemic resistance. They also drive global biogeochemical cycles that influence …
-
Agroecosystem management strategies and trophic interactions among herbivores, pathogens and predators
… complexity and increasing biomass of cultivated plants offer favorable conditions for pest species in conventional systems. Among biological control strategies, the restoration of vegetation diversity in agroecosystems and the adoption of management strategies aiming to reduce impacts on natural …
-
Fungi associated with the pistillate flowers of white oak (Quercus alba L.) and their effect on pollen germination
… several species of each genera are parasitic on crop plants, they are primarily saprophytic in the forest ecosystem. Of the three genera, only <u>Cladosporium</u> is parasitic on <u>Q. alba</u>, causing a leaf mold. Several other genera of fungi were isolated in low frequency from the oak …
-
Enhancement of cold tolerance and growth of tomato plants using endophytic bacteria isolated from cold-adapted plants
… is a key abiotic factor that adversely impacts crop production. Climate change is responsible for warm winter periods that allow crop production under partial protection, such as commercial greenhouses and tunnels used for tomato production in Sicily. However, temperature conditions are not …
-
The double life of an insect pathogen: Metarhizium as a plant symbiont and its genetic diversity in coffee agroecosystems
… to transfer nitrogen from insect cadavers to plants, act as plant pathogen antagonist and plant growth promoter. All those functions could be valuable as ecosystem services provided by these fungi to plants in sustainable agricultural schemes. However, these fungi are poorly considered in an …
-
Genetic and morphological diversity in the Icelandic woodland strawberry (Fragaria vesca L.)
The strawberry is one of twenty most valuable crop plants in the world, it is economically viable and a desired commodity of most. The strawberry genus (Fragaria) contains considerably few species but only on grows in Iceland, the F. vesca. The plant is the most widespread of all strawberry species …
Page 1 of 4