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.
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Showing 1 to 20 of 53 for “"chlorosis"”.
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Quantitative Trait Locus Analysis of Iron Deficiency Chlorosis in Soybean
… plain area is challenged by iron deficiency chlorosis (IDC), a physiological problem with plants grown in high pH calcareous soils. Planting tolerant varieties is the best approach to meet the challenge. Currently, the variety development is limited by lack of genetic resources and knowledge …
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Soil and plant factors associated with iron chlorosis of Kentucky bluegrass
Iron (Fe) chlorosis is a common problem on turfgrasses grown under alkaline soil conditions. The objective of this study was to determine the iron uptake efficiency of different varieties of Kentucky bluegrass. In this study, 25 varieties and 5 blends of Kentucky bluegrass (Poa pratensis L.) were …
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High-Throughput Phenotyping for Soybean Iron Deficiency Chlorosis Using an Unmanned Aircraft System: Applications in Breeding, Agronomy, and Genetics
Iron deficiency chlorosis (IDC) is an abiotic stress in soybean [Glycine max (L.) Merr.] that causes significant yield reductions. Symptoms of IDC include interveinal chlorosis and stunting of the plant. While there are management practices that can overcome these drastic yield losses, the …
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Physiological and genetic investigations of iron deficiency in field peas (Pisum sativum L.).
Iron (Fe) deficiency chlorosis affects both yield and quality of many species, including cool-season food legumes and the chlorosis symptom is especially prevalent in crops grown on calcareous soils which are widely distributed in the southern region of Australia. Although Fe fertilizers have been …
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Evaluation of Bioherbicidal Properties of Pseudomonas syringae pv. tagetis for Control of Canada thistle (Cirsium arvense)
… as it produces tagetitoxin, which causes chlorosis and stunting in plants of the Asteraceae. The objective of my thesis was to assess P. syringae pv. tagetis strains for use as an organic bioherbicide for Canada thistle. There were four objectives in this study: 1) to assess the virulence …
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Effects of CO₂ enrichment and potassium supply on growth and inorganic nutrition of chrysanthemum (Dendranthema grandiflora Tzvelev)
… nutrient concentrations, and induced leaf chlorosis. The interpretation of K effects was restricted by the possible detrimental effect of acetic acid. This negative effect was probably enhanced by daily drifts in the pH of nutrient solutions. Both acetic acid additions and the size of pH …
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The role of glycogen Metabolism in the Adaptation to environmental Changes of the cyanobacterium Synechocystis sp. PCC 6803
… such as high light, nitrogen depletion (chlorosis). This work expands our understanding of how to regulate carbon flow towards desired compounds by diverting it from glycogen reserves. The research also focuses on the importance of glycogen in the transition from phototrophic to …
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Efficacy, Phytotoxicity, and Cover Crop Response of Herbicide Combinations in Dark Fire Cured Tobacco
… at a rate of 134.68 kg pr/ha. Visual wheat chlorosis evaluations of each subplot were recorded and based on a scale of 0-100%. Stand counts were taken in the subplots to examine stand loss due to treatment. Wheat aboveground biomass was harvested from each subplot to evaluate the …
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Expression and inheritance of resistance to Fusarium solani in soybean
… include root rot, xylem discoloration, foliar chlorosis and interveinal necrosis. Microplot, field and greenhouse experiments were performed to study the development of SDS on soybean, develop a greenhouse inoculation method for F. solani, then study the relationship between the greenhouse and …
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Role of Pyrenophora teres toxins in net blotch of barley.
… of brown necrotic spots and extensive chlorosis in susceptible barley cultivars. Although a number of low molecular weight compounds (LMWCs) have been previously isolated from P. teres culture filtrates, they only induced certain components of symptoms. Fungal metabolites were extracted …
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Host-parasite interactions of barley yellow dwarf virus and oats: Physiological and immunological studies
The symptoms of barley yellow dwarf, chlorosis, stunting, and reduced heading or sterility in cereals, are readily confused with mineral deficiency or other cultural stresses. The pathogen, barley yellow dwarf virus (BYDV) is restricted in its host to phloem tissue, and phloem blockage leads to the …
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The role of the vasculature in iron allocation and sensing in plants
… Thus, Fe deficiency can lead to plant chlorosis and reduction in yield as a result of a decreased photosynthetic capacity. In crop plants like soybean, Fe deficiency chlorosis can cause up to 30% reduction in yield (2-4). In humans, Fe is required for hemoglobin molecules to transport …
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The effects of the three soil-inhabiting fungi on peanuts grown under germ-free conditions
… damage, but in combination caused stunting and chlorosis. A flavus and Trichoderma sp. alone killed plants within 15 and 20 days, respectively, after inoculation; while in combination they killed plants within 15 days. Inoculations of plants with all 3 fungi in combination caused less damage.
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Machine learning analytics for predictive breeding
… spatial models using soybean iron deficiency chlorosis (IDC) as an example. After incorporation of the spatial pattern recognition to provide adjusted ordinal data, a comparison of prediction accuracies between algorithmic modeling and data modeling approaches were systematically conducted. …
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Characterization of Pyrenophora Tritici-Repentis in Wheat and Rye to Study Tan Spot Susceptibility and Insights Into Its Relationship with Stem Rust Resistance
… and ToxC, which are associated with necrosis and chlorosis symptoms on wheat differential lines. In order to see the correlation between stem rust resistance and tan spot susceptibility in 1970’s, to know the pathogen virulence profile, and explore the sources of tan spot resistance, we recovered …
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The Effect of the Site of Nitrogen Assimilation on Plant Growth
… Changes in growth and co-suppression-like leaf chlorosis was the most frequent outcome, often causing a lowering or disappearance of NRA. A negative correlation between the ratio of root and shoot reduction of nitrate and the root shoot ratio of transformed plants was found. The possible reasons …
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Application of plant tissue and organ culture in soybean improvement for resistance to Septoria glycines
… Culture filtrate from 21-day-old cultures caused chlorosis on detached cotyledons and inhibited the growth of soybean callus. Less than 20% of the seeds germinated on culture filtrate-containing water-agar at a 1:2 dilution. Embryogenesis was stimulated when germinated soybean seeds on water-agar …
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Analyzing genetic response mechanisms associated with copper homeostasis in Populus trichocarpa using a bioinformatics approach
… and wound healing. Copper deficiency can cause chlorosis, leaf curling, and weakened stems. It is proposed that under copper deficient conditions plants down regulate genes whose proteins use copper as a cofactor but also play an "unessential" role for the plants survival, thereby preserving …
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MOLECULAR CHARACTERIZATION OF THE INTERACTION BETWEEN HELIANTHUS ANNUUS AND VERTICILLIUM DAHLIAE
… sunflower by inducing wilting symptoms such as chlorosis, necrosis and vascular discoloration, but also as an elicitor triggering defense responses of the host. VdNEP induced the hypersensitive cell death in Nicotiana benthamiana leaves and sunflower cotyledons. Moreover, VdNEP activated the …
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Functional Characterization of Metallothioneins in Arabidopsis and Barley
… with reduced root growth and interveinal chlorosis in mature rosette leaves. The sensitivity to Cu deficiency was even more severe when plants were grown under high light conditions. Under conditions of reduced Cu availability, the quadruple mutant still accumulated more Cu in shoots than …
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