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 47 for “"Heat Tolerance"”.
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Genetic analysis for heat tolerance in tropical maize (zea mays)
… third important cereal crop in the world after wheat and rice. Its production is however hampered by both biotic and abiotic factors. Among the abiotic factors, heat stress has been reported to cause yield losses of about 1 to 1.7 % per day for every rise in temperature above 30◦C. Development of …
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Genetic analysis for heat tolerance in tropical maize (zea mays)
… third important cereal crop in the world after wheat and rice. Its production is however hampered by both biotic and abiotic factors. Among the abiotic factors, heat stress has been reported to cause yield losses of about 1 to 1.7 % per day for every rise in temperature above 30◦C. Development of …
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Estimating Heat Tolerance of Tree Buds in the Southeastern United States
… if tree buds may exhibit speciesspecific fire or heat tolerance. Understanding potential relationships between bud characteristics and fire tolerance may assist prescribed fire managers as they target control of specific undesired tree species while promoting desired tree species. Buds of six …
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Combining Common Bean Rust Resistance And Heat Tolerance In Snap Beans (Phaseolus Vulgaris L.) For Eastern Africa
… Uromyces appendiculatus (Per.:Pers) Unger, and heat stress limit snap bean production in many tropical and temperate regions. Snap beans that combined broad-spectrum rust resistance with heat tolerance in the same genetic backgrounds were developed and selected for tropical agroecosystems. Eight …
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Heat tolerance of Southern Pied Babblers in the Kalahari Desert : how will they respond to climate change?
… effort and efficiency and the presence of heat-dissipation behaviours were assessed to determine the mechanisms by which increased temperature affect babbler body condition.
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Genetic variation of heat tolerance and correlation with other agronomic traits in a maize (Zea mays L.) recombinant inbred line population
Heat stress is a critical environmental factor that affects agricultural production in the southwest of the United States, especially in West Texas. Heat stress can reduce plant height, kill the leaf tissues, cause abortion of pollen and kernel, and affect the cell activities. The objectives of …
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High temperature stress responses of Salvia splendens and Viola X wittrockiana
… and physiological mechanism associated with the heat tolerance. Two genotypes for each species were used; a heat tolerant Vista and a heat sensitive Sizzler cultivar of salvia and Crystal Bowl Purple (CBP) a heat tolerant and Majestic Giant Red (MGR) a heat sensitive cultivar of pansy. …
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The influence of environmental temperature on the thermal tolerance of Antarctic notothenioid fishes
… has resulted in a remarkably narrow thermal tolerance shared among most extant species. While most of these fishes have the capacity to accommodate the physiological challenges of low temperature, they show a greatly reduced tolerance to heat relative to fishes native to warmer waters. Though …
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Morpho-Physiological responses of spring wheat(Triticum Aestivum L.) to heat stress
Constant or transitory high temperatures affect wheat growth and development leading to diverse morphological, physiological and biochemical changes that eventually decrease grain yield. It is against this background that this study was conducted to identify morpho-physiological traits associated …
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Morpho-Physiological responses of spring wheat(Triticum Aestivum L.) to heat stress
Constant or transitory high temperatures affect wheat growth and development leading to diverse morphological, physiological and biochemical changes that eventually decrease grain yield. It is against this background that this study was conducted to identify morpho-physiological traits associated …
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HORMONAL AND GENETIC BASIS OF HEAT RESPONSE IN FIELD PEA (PISUM SATIVUM L.)
… a cool-season legume crop, is known for poor heat tolerance. Over the last decade, progress has been made in the understanding of the physiological damage of pea plants caused by heat stress (HS), however, knowledge of the hormonal and genetic basis of heat stress response (HSR) is still …
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Genomic and physiological adaptation to temperature in the invasive golden star runicate (Botryllus schlosseri)
… the potential for rapid adaptation of thermal tolerance at the genomic level, this chapter demonstrated that the molecular basis of thermal adaptation on either coast is distinct, providing valuable evidence for parallel adaptation being driven by divergent molecular means. In Chapter 3, I …
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The thermal macrophysiology of core and marginal populations of the aphid Myzus persicae in Europe
… Sweden, UK and Spain. Indices of temperature tolerance (upper and lower lethal temperature50, coma temperatures and mobility thresholds) were determined for each aphid clone at different rearing temperatures. Acclimation at 10°C for one generation increased cold tolerance by depressing lower …
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Genomic and physiological adaptation to temperature in the invasive golden star tunicate (Botryllus schlosseri)
… the potential for rapid adaptation of thermal tolerance at the genomic level, this chapter demonstrated that the molecular basis of thermal adaptation on either coast is distinct, providing valuable evidence for parallel adaptation being driven by divergent molecular means. In Chapter 3, I …
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Cloning of novel low and high molecular weight heat shock genes in wheat
Heat tolerance is an important objective for wheat improvement in the Southern US Great Plains. It is hypothesized that heat shock proteins play a vital role in the plant's ability to survive high temperature stress. Cloning low and high molecular weight HSPs from a thermotolerant variety of wheat …
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The influence of spatiotemporal variation in ambient temperature on the ecology and physiology of birds
… hypothesis (CVH), which predicts that thermal tolerance breadth should increase with increasing levels of temperature variability. Studies documenting latitudinal increases in the thermal tolerance breadth of ectotherms and thermoneutral zone (TNZ –a proxy for thermal tolerance) breadth in …
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Experimental Analyses of Pain: Understanding Processes and Developing Interventions
… and distraction-based interventions on the tolerance and distress of experimentally induced radiant heat pain. The research program comprised five automated experimental studies, including componential analyses to investigate the processes underpinning the use of acceptance and distraction …
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Genetic and Physiological Bases of Heat-Induced Floret Sterility in Wheat
… an alarming rate, which is a major concern for wheat growers due to the adverse effects of these temperatures on crop productivity. The current study focussed on the impact of brief episodes of high temperatures during the booting stage on floret fertility in wheat, using a combined approach of …
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A Study Of The Gastropoda Of Fontenelle Forest
… were subjected to studies concerning diet, pH tolerance, and heat tolerance.
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Effects of heat and acid stress on bacterial populations of beef, and on susceptible and multi-antimicrobial resistant Salmonella isolated from beef
… provided cross-protection against low-pH or heat stress. Results of studies evaluating methods to improve microbiological quality of chilled beef carcasses, subprimal cuts, and fabrication table surfaces, suggested reduced antimicrobial efficacy (≤ 1 log CFU/100 cm2 reduction) of …
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