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 18 of 18 for “"biotic stresses"”.
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The role of genotypic diversity in stabilizing plant productivity in variable environments
… accessions of A. thaliana buffered against abiotic stress, specifically nutrient and heat stress, and increased yield stability through compensation. The role of compensatory interactions in genotypic mixtures was supported by experiments investigating the ability of A. thaliana genotypic …
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Characterization of theWound-Induced Signaling Pathway In Tomato
… must defend themselves from a wide array of biotic stresses, including herbivorous insects, phytopathogenic fungi, bacteria, and viruses. The varied nature of these stressors requires that the plant recognize a specific stress and mount an appropriate defense response. The defense response in …
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The Arabidopsis thaliana Heat Shock Transcription Factor A1b Transcriptional Regulatory Network
… to be central regulators of plant responses to abiotic and biotic stress conditions. However, the extremely high multiplicity in plant HSF families compared to those of other kingdoms and their unique expression patterns and structures suggest that some of them might have evolved to become major …
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The Role of Arabidopsis thaliana Cyclic Nucleotide-Gated Channels 2, 6, and 19 in Extracellular ATP Signalling
… molecule in plants but poorly understood. Upon abiotic and biotic stresses, ATP is released into the extracellular matrix, where it is referred as eATP, to regulate plant growth and development, salt tolerance, immunity, and the Damage-Associated Molecular Patterns (DAMP) response. Two plasma …
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Effects of several abiotic and biotic factors and plant hormones on growth, morophology, and camptothecin accumulation in Camptotheca acuminata seedlings
… dissertation seeks to explore the effects of abiotic factors [nitrogen (N), sodium chloride (NaCl), and ultraviolet (UV) light], biotic factor [acetylsalicylic acid (ASA)], and plant hormones [benzyl adenine (BA) and naphthalene acetic acid (NAA)] on growth, morphology, and secondary …
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Genetic analysis of cowpea (Vigna unguiculata L. WALP) agronomic variables in phosphorus limiting soil.
… been characteristically low as a result of both abiotic and biotic stresses. Among the abiotic stresses, yield losses due to phosphorus (P) deficiency is an important factor. Identification and selection of cowpea genotypes possessing suitable agronomic traits is key for cultivar design and …
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Genetic analysis of cowpea (Vigna unguiculata L. WALP) agronomic variables in phosphorus limiting soil.
… been characteristically low as a result of both abiotic and biotic stresses. Among the abiotic stresses, yield losses due to phosphorus (P) deficiency is an important factor. Identification and selection of cowpea genotypes possessing suitable agronomic traits is key for cultivar design and …
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Consumption of Endophyte Infected Fescue During Gestation in Beef Cows
… States that is known for its resistance to abiotic and biotic stresses. A main reason for tall fescue's resistance to these stresses is attributed to the presence of a fungal endophyte. Unfortunately, this endophyte also adversely affects cattle production. Cows consuming the ergot alkaloids …
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Initial Fine Mapping of the Spinach Downy Mildew Resistance Locus RPF1
… Spinach production, however, is affected by many biotic stresses. Downy mildew, caused by <em>Peronospora farinosa</em> f. sp. <em>spinaciae (Pfs) </em>, is perhaps the most important biotic constraint for spinach production worldwide (Correll et al, 1994). As of 2012, 14 races of <em>Pfs</em> …
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High-throughput maize root phenotyping
… contributes to plant performance under abiotic and biotic stresses. In order to close this knowledge gap, we first investigated the genetic basis of embryonic and post-embryonic maize root systems complexity. We define root complexity as the number of root branching points per soil …
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QTL mapping of Phytophthora root rot resistance and aphid resistance in soybean
… $40.2 billion US dollar worth soybeans in 2011. Biotic stresses such as soybean cyst nematode (SCN), Phytophthora root rot (PRR), sudden death syndromes (SDS) and soybean aphids are threatening soybean production and plant health. Three independent projects were performed to identify genetic …
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Rhizobia inoculant effects on bambara groundnut growth and yield in Namibia
… on a gradual decline due to a combination of abiotic and biotic stresses such as erratic annual rainfall and climate induced changes in soil microbial community compositions, which negatively impacting food security. Thus, the application of rhizobial inoculants at planting significantly …
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Benzoic acid regulates the physio-biochemical responses of chia (Salvia hispanica L.) seedlings under salinity stress
… plants constantly susceptible to various abiotic and biotic stresses. These stresses generate reactive oxygen species (ROS), which cause cellular damage through osmotic or oxidative stress, ultimately constraining agricultural productivity worldwide. To mitigate the challenges caused by …
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AN INTEGRATED APPROACH TO THE DEVELOPMENT OF RESISTANCE TO COMMON BACTERIAL BLIGHT IN COMMON BEAN (PHASEOLUS VULGARIS)
… nutrition security, but yields are threatened by biotic stresses, such as common bacterial blight (CBB) disease. CBB, caused by Xanthomonas phaseoli pv. phaseoli (Xpp) and Xanthomonas citri pv. fuscans, can reduce yields by up to 45 %. Breeding for resistance is the most sustainable control …
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Signal transduction during defense response and source-sink transition in tomato
… an elaborate system to cope with a variety of biotic and abiotic stresses. Typically, under stress conditions an appropriate defense response is invoked which is accompanied by changes in the metabolic status of the plant. Photosynthesis is downregulated and sucrose is imported into the tissue, …
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Genomic and genetic resource for soybean disease resistance improvement
… miRNAs in response to environmental signals and biotic stresses in plants. To date, no study has been carried out describing the composition of miRNAs in any wild perennial relatives of soybean. In this study, we provided the first profile of miRNAs in G. latifolia by sequencing a small RNA …
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Generation of Transgenic <i>Medicago Sativa</i> Overexpressing "<i>Osmotin-Chitinase</i>" Gene Chimera
… could potentially confer resistance to different biotic and abiotic stresses. Seed germination of several cultivars of <i>Medicago</i> (<i>M. sativa ssp. sativa, M. sativa ssp. falcata, M. sativa ssp. caerulea, M. truncatula</i>, and <i>M. Rugosa</i>) was tested to determine the cultivars with …