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Showing 1 to 20 of 23 for “"cold acclimation"”.
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Physiological and genetic mechanism(s) of cold acclimation in Rhododendron
An in vitro laboratory protocol for assessing cold hardiness (CH) in rhododendrons based on electrolyte-leakage was developed. The raw leakage data were transformed into percent-adjusted injury, which showed high correlation with injury data based on visual observations. The percent-adjusted injury …
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Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster
… of K+ in the haemolymph (hyperkalemia). Cold-acclimation can mitigate these ion imbalances, but the physiological mechanisms that facilitate this process are still not understood. Upon adult emergence, D. melanogaster females were subjected to seven days at 25C (warm-acclimation) or 10C …
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Analysis of cold acclimation ability and drought tolerance of Petunia spp
Thesis (M.S.)--Michigan State University. Department of Plant Breeding and Genetics - Horticulture, 2009
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Cold-acclimation of the wood cockroach <i>Cryptocercus punctulatus</i> (Scudder) (Dictyoptera: Cryptocercidae)
The general overwintering strategy employed by the woodroach, <i>Cryptocerclls punctulatus</i> (Scudder) appears to be fairly typical among freeze-tolerant insects. In this species, as well as others, heat-labile hemolymph ice nucleating factors induce extracellular ice formation at a high subzero …
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Physiological study of cold acclimation in Rhododendron sp. with emphasis on role of dehydrins
… of 25 kDa dehydrin accumulation during cold acclimation (CA) in a wide array of Rhododendron species. These species (24 in total) belong to two diverse subgenera, Hymenanthes and Rhododendron, native to diverse latitudes and altitudes. The dehydrin of interest is highly conserved in …
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Cold Acclimation Response of Non-native Italian Wall Lizard (Podarcis siculus) Populations from New York and California
… in the northern hemisphere, the response to cold is of special interest, considering that poleward range expansion events and increasing variability of temperatures during winter are already being observed as consequences of a warming planet. Though direction of change in physiological …
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Quantitative expression analysis of four low-temperature-tolerance-associated genes during cold acclimation in wheat (Triticum aestivum L.)
… (Triticum aestivum L.), seeded in the fall, cold acclimates when exposed to low fall temperatures. Growth resumes in spring, culminating in early summer harvest. Winter wheat yield is generally 20-25% higher than spring wheat. However, winter damage/kill can reduce its yield. A better …
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Tissue Hypertrophy: A Quantitative Adaptational Strategy During Cold Acclimation in Channel Catfish and Green Sunfish (Immunoelectrophoresis, Heart, Liver, Protein Synthesis, Degradation)
1. Livers of 15 C acclimated channel catfish (CCF) exhibit cellular hypertrophy compared to livers of 25 C acclimated catfish as shown by doubling of hepatosomatic index (HSI) and total liver protein. No change occurs in protein concentration or total liver DNA. The same pattern was observed for …
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The effects of exogenous application of abscisic acid and α,α'-dipyridyl on cold acclimation and physical characteristics of Pisum sativum 'Alaska' seedlings
Cold acclimation entails changes in membrane composition, osmotic adjustment, alterations in the cell wall-plasma membrane interface, sugar deposition, and changes in cell wall proteins. There is evidence that a rigid cell wall may be necessary for cold acclimation. Difficulties arise in studying …
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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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Circadian regulation and natural variation of low temperature signaling in Arabidopsis
… temperature through a process known as cold-acclimation. In Arabidopsis, cold acclimation is associated with the induction or repression of over a thousand genes. The CBF cold response pathway has a central role in these changes. Within minutes of transfer to low temperature, genes …
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Aquaglyceroporin Expression and Regulation in Erythrocytes From Freeze Tolerant Cope’s Gray Treefrog, <i>Hyla Chrysoscelis</i>
… accumulates glycerol as a cryoprotectant during cold acclimation. Aquaporins, members of the major intrinsic protein (MIP) family of transmembrane water pores, may play an important role in the mechanism of freeze tolerance by mediating glycerol and water transport across cell membranes. Thus, we …
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Plant growth responses to winter climate change: from amongand within-species variation to plant-soil interactions
… winter warming and to study its effects on cold acclimation and deacclimation, dormancy loss and frost tolerance. Amongspecies variation was then compared with within-species variation to determine if a species could be largely treated as a single response unit under different climatic …
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Attempt to express the Xerophyta viscose stress-responsive gene, Xvcor, in yeast with view to functional analysis
… from temperate regions, have established that cold acclimation is regulated at the gene expression leveL To study the function ofaXerophyta viscosa cold responsive protein that accumulates in plant cells under various environmental stresses, we have cloned the Xerophyta viscosa cold-responsive …
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Isolation and analysis of cotton genomic clones encompassing a fatty acid desaturase (FAD2) gene
… acid desaturase (FAD2) may be responsible for cold acclimation response, since polyunsaturated phospholipids are important in helping maintain plant viability at lowered temperatures. To study regulation of FAD2 gene expression in cotton, a FAD2 gene was isolated from two genomic libraries …
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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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Identification of clone x rootstock effects on cold hardiness and relevant dehydrins changes in Cabernet franc (Vitis vinifera L.)
Cold injury can harm grapevines and severely reduce yields in cool-climate regions. Previous studies indicate bud cold hardiness differences among Vitis vinifera cultivars, but comparatively, little attention has been given to the effect of clone and rootstock. This study investigates the bud cold …
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A Molecular and Phylogenetic Analysis of Cryobiosis in Nematodes of the Genus Panagrolaimus
… to -80 oC to those that are freezing sensitive. Acclimation significantly improves the freezing survival of temperate, subpolar, polar and continental Panagrolaimus strains and species. They also undergo anhydrobiosis and a correlation exists between desiccation tolerance and freezing tolerance. …
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Characterisation of the cold-shock response in Mycobacterium smegmatis
The response of Mycobacterium smegmatis to a cold shock was investigated in order to gain insight into the stress responses of members of the genus Mycobacterium. Mycobacterium smegmatis cultures were shocked from 37°C to 30°C, 25°C, 15°C, and 10°C and the effects on both growth (ATP concentration, …
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