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 45 for “"cold tolerance"”.
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Impact of Management Practices on Cold Tolerance of Ultradwarf Bermudagrass Putting Greens
… core aeration, and trinexapac-ethyl (TE) on UDB cold tolerance, winter quality, and cold de-acclimation (CD). Our results indicate that the use of turf covers significantly increased UDB canopy and soil temperatures when air temperatures were below -3.9°C. Air gaps under covers and the use of …
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Cold Tolerance, Diapause and Winter Survival of the Brown Marmorated Stink Bug (<i>Halyomorpha halys</i>)
… winter survival within invaded northern regions. Cold tolerance has been previously evaluated in the eastern United States, bot nut within western populations. Winter diapause. Along with any potential links between diapause and cold tolerance remain unstudied. I examined characteristics of cold …
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Effects of feeding supplemental fat to cows in late gestation on cold tolerance in newborn calves
… and thermogenic response during short-term cold stress were examined in fall-born neonatal beef calves. Pregnant fall-calving heifers (n = 15) were randomly assigned to three dietary treatments: Control (CON, n=5), Safflower seed (SAF, n=5), or Cottonseed (COT, n=5) supplement. Hay-based …
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Enhancement of cold tolerance and growth of tomato plants using endophytic bacteria isolated from cold-adapted plants
Cold stress 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 …
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Systems-Level Analysis of Rootstock–Scion Interactions in Apple Reveals Mechanisms of Cold Tolerance Under Field Frost Events
… the mechanisms underlying rootstock-dependent cold tolerance in orchard conditions remain poorly understood. In this study, we investigated frost tolerance in two apple (Malus domestica Borkh.) cultivars, 'Fuji' and 'Gala', grafted onto ten different rootstocks over the springs of 2021–2023, to …
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Cold Tolerance, Temperature Mediated Discontinuous Gas Exchange, and Emergence of the Blue Orchard Mason Bee (<i>Osmia lignaria</i>)
<p>The relationship between low temperatures, emergence and supercooling point of <em>Osmia lignaria </em>were the subject of this study. One hundred sixty-eight bees were subjected to 5 pre-wintering temperature treatments (two constant temperature controls - 22<sup>o</sup>C, 14<sup>o</sup>C, one …
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Exploiting the Productivity of C4 Photosynthesis in Cool Temperate Climates: Mechanisms and Thresholds of Cold Tolerance in Miscanthus, Saccharum, and Spartina pectinata
… Although there is nothing inherently cold sensitive about the C4 pathway, cold tolerant C4 grasses are rare and the additional C4 cycle and architecture introduce more potentially cold sensitive sites. In addition, the C4 cycle imposes a greater restriction in demand for energy and may …
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Dissecting key biomass and adaptation traits of Miscanthus through genetic mapping, exploring mechanisms of cold tolerance, and flowering time in Miscanthus and Saccharum
… need for developing new cultivars with superior cold tolerance that could be optimized for regions with severe winters. Three complementary studies on the genetics of overwintering ability of Miscanthus were conducted: 1) an interconnected population consisting of three full-sib families each …
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Investigations of Colorado potato beetle [Leptinotarsa decemlineata (Say)] pest management including: sampling strategies for insecticide resistance detection, development of a knowledge-based expert system and the physiology of cold tolerance
… mechanisms Colorado potato beetle are using for cold tolerance. Two polyhydric alcohols (polyols) were isolated in the hemolymph of Colorado potato beetle using high performance thin layer chromatography. The polyols were tentatively identified as inositol and xylitol.
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Thermal biology and behaviour of two predatory Phytoseiid mites: Amblyseius swirskii (Athias-Henriot) (Acari:Phytoseiidae) and Phytoseiulus longipes (Evans) (Acari:Phytoseiidae)
… Laboratory results demonstrate a low level of cold tolerance in A. swirskii and no diapause. Field studies recorded 100% mortality within two weeks of outdoor winter exposure. Amblyseius swirskii has a higher activity threshold temperature than it’s target prey T. urticae. Amblyseius swirskii …
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Characterizing phenotypic diversity, genotype by environment interactions, and optimizing selection efficiency of a miscanthus germplasm collection
… traits, and spring and autumn frost tolerance, 4) determine the predictive value of three putative yield-component traits for estimating yield, and 5) quantify the relative importance of genotype × environment and error variances for estimating genotypic values. We found that …
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Ecotypic Variation in Johnsongrass in Its Invaded U.S. Range
… (L.) Pers.) seedling stress response, propagule cold tolerance, and large-scale niche dynamics for correlation with populations' climatic and ecotypic (i.e., agricultural vs. non-agricultural) origin. Overall, I found a greater number of home climate effects than ecotypic effects on various …
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SIMILAR EFFECTS OF COLD ADAPTATION AND EXERCISE TRAINING ON GROWTH, MAXIMUM AEROBIC CAPACITY, AND METABOLISM IN YOUNG RATS
… It is known that exercise increases DIT, while cold-adaption increases NST.</p><p>This experiment examined the effects of cold- and exercise-adaption in male and female Sprague Dawley weanling rats. Cold-adaption consisted of 30 days of continuous exposure at 5 Centigrade. Graded exercise …
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Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport
… temperatures; loss of this homeostasis in the cold likely contributes to chronic chilling injury, and reestablishment of homeostasis is required for recovery from chilling. Both plastic and interspecific variation in cold tolerance correlates with enhanced defense of water and ion homeostasis …
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Nutritional and PGR effects on lipid unsaturation, osmoregulant content, and relation to bermudagrass cold hardiness
… or induce winter dormancy while maintaining cold hardiness, applications of seaweed extract (SWE) (0.54 kg ha-1), ethephon (16 L ha-1), Fe (1 kg ha-1), and N (49 kg ha-1) took place every three weeks during the fall of 2001 and 2002. Cultivars examined included 'Riviera', 'Midiron', …
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Thermal biology and establishment potential of two non-native candidate biological control agents, Nesidiocoris tenuis Reuter (Hemiptera: Miridae) and Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae), in the U.K.
… Laboratory results demonstrated a low level of cold tolerance in \(N.\) \(tenuis\) with a developmental threshold of 12.9°C and no indication of ability to diapause. Field trials supported these findings with 100% mortality occurring after less than 4 weeks of winter field exposure. …
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Cool Temperature Effects on Productivity and Photosynthesis of Two Biomass Fuel Species: Switchgrass (Panicum virgatum) and Miscanthus (Miscanthus x giganteus)
… "mol m-2s-1). Miscanthus has demonstrated cold tolerance in previous studies, and here showed no significant decrease in the productivity or photosynthetic rates in cool, compared with warm, growing conditions (Amax=8.2 "mol m-2s-1 and 7.0 "mol m-2s-1 for warm and cool conditions, …
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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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