scholarly journals Genetic and physiological mechanisms of freezing tolerance in locally adapted populations of a winter annual

2019 ◽  
Vol 107 (2) ◽  
pp. 250-261 ◽  
Author(s):  
Brian J. Sanderson ◽  
Sunchung Park ◽  
M. Inam Jameel ◽  
Joshua C. Kraft ◽  
Michael F. Thomashow ◽  
...  
Keyword(s):  
Freezing Tolerance ◽  
Physiological Mechanisms ◽  
Winter Annual

scholarly journals Genetic and physiological mechanisms of freezing tolerance in locally adapted populations of a winter annual

2019 ◽  
Author(s):  
Brian J. Sanderson ◽  
Sunchung Park ◽  
M. Inam Jameel ◽  
Joshua C. Kraft ◽  
Michael F. Thomashow ◽  
...  
Keyword(s):  
Local Adaptation ◽  
Freezing Tolerance ◽  
Adaptive Response ◽  
Sequence Polymorphism ◽  
Loss Of Function ◽  
Physiological Mechanisms ◽  
Naturally Occurring ◽  
Before And After ◽  
Winter Annual ◽  
Insight Into

ABSTRACTPremise of the studyDespite myriad examples of local adaptation, the phenotypes and genetic variants underlying such adaptive differentiation are seldom known. Recent work on freezing tolerance and local adaptation in ecotypes of Arabidopsis thaliana from Sweden and Italy provides the essential foundation for uncovering the genotype-phenotype-fitness map for an adaptive response to a key environmental stress.MethodsHere we examine the consequences of a naturally occurring loss of function (LOF) mutation in an Italian allele of the gene that encodes the transcription factor CBF2, which underlies a major freezing tolerance locus. We used four lines with a Swedish genetic background, each containing a LOF CBF2 allele. Two lines had introgression segments containing of the Italian CBF2 allele, and two were created using CRISPR-Cas9. We used a growth chamber experiment to quantify freezing tolerance and gene expression both before and after cold acclimation.Key resultsFreezing tolerance was greater in the Swedish (72%) compared to the Italian (11%) ecotype, and all four experimental CBF2 LOF lines had reduced freezing tolerance compared to the Swedish ecotype. Differential expression analyses identified ten genes for which all CBF2 LOF lines and the IT ecotype showed similar patterns of reduced cold responsive expression compared to the SW ecotype.ConclusionsWe identified ten genes that are at least partially regulated by CBF2 that may contribute to the differences in cold acclimated freezing tolerance between the Italian and Swedish ecotypes. These results provide novel insight into the molecular and physiological mechanisms connecting a naturally occurring sequence polymorphism to an adaptive response to freezing conditions.

scholarly journals Physiological Mechanisms Only Tell Half Story: Multiple Biological Processes are involved in Regulating Freezing Tolerance of Imbibed Lactuca sativa Seeds

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Ganesh K. Jaganathan ◽  
Yingying Han ◽  
Weijie Li ◽  
Danping Song ◽  
Xiaoyan Song ◽  
...  
Keyword(s):  
Freezing Tolerance ◽  
Lactuca Sativa ◽  
Biological Processes ◽  
Physiological Mechanisms

Biochemical and physiological mechanisms related to cold acclimation and enhanced freezing tolerance in poplar plantlets

2005 ◽  
Vol 125 (1) ◽  
pp. 82-94 ◽  
Author(s):  
Jenny Renaut ◽  
Lucien Hoffmann ◽  
Jean-Francois Hausman
Keyword(s):  
Cold Acclimation ◽  
Freezing Tolerance ◽  
Physiological Mechanisms

scholarly journals Relative freezing tolerance of facultative winter annual weeds

2011 ◽  
Vol 91 (4) ◽  
pp. 759-763 ◽  
Author(s):  
S. Zahra H. Cici ◽  
Rene C. Van Acker
Keyword(s):  
Freezing Tolerance ◽  
Field Observations ◽  
Growth Capacity ◽  
Early Emergence ◽  
Relative Tolerance ◽  
Winter Annual ◽  
Freezing Temperatures ◽  
Winter Annual Weeds ◽  
Annual Weeds

Cici, S. Z. H. and Van Acker, R. C. 2011. Relative freezing tolerance of facultative winter annual weeds. Can. J. Plant Sci. 91: 759–763. To understand why some of the facultative winter annual weeds are more abundant in spring rather than both in fall and spring, we assessed the freezing tolerance and re-growth capacity of 12 species collected across Canada. Our study allowed us to classify these species in three broad categories based on their relative tolerance to freezing temperatures. Freezing scores and biomass reproduction after freezing were generally consistent with field observations. It was shown that early emergence of weeds in spring is not, however, systematically related to superior freezing tolerance.

Induction of freezing tolerance in potato (Solanum commersonii) suspension cultured cells

1992 ◽  
Vol 84 (1) ◽  
pp. 41-48 ◽  
Author(s):  
Stephen P. Lee ◽  
Baolong Zhu ◽  
Tony H. H. Chen ◽  
Paul H. Li
Keyword(s):  
Freezing Tolerance ◽  
Cultured Cells ◽  
Solanum Commersonii ◽  
Suspension Cultured Cells

EVALUATION OF CLOVERS ON SANDY COASTAL SOIL

1977 ◽  
pp. 130-138 ◽  
Author(s):  
W.M. Williams ◽  
L.B. Anderson ◽  
B.M. Cooper
Keyword(s):  
New Zealand ◽  
Drought Stress ◽  
Sandy Soil ◽  
White Clover ◽  
Plant Material ◽  
Red Clover ◽  
Early Spring ◽  
Commercial Cultivars ◽  
Mediterranean Origin ◽  
Winter Annual

In evaluations of clover performances on summer-dry Himatangi sandy soil, it was found that none could match lucerne over summer. Emphasis was therefore placed on production in autumn-winter- early spring when lucerne growth was slow. Evaluations of some winter annual clover species suggested that Trifolium spumosum, T. pallidum, T. resupinatum, and T. vesiculosum would justify further investigation, along with T. subterraneum which is already used in pastures on this soil type. Among the perennial clover species, Kenya white clover (7'. semipilosum) showed outstanding recovery from drought and was the only species to produce significantly in autumn. However, it failed to grow in winter-early spring. Within red clover, materials of New Zealand x Moroccan origin substantially outproduced the commercial cultivars. Within white clover, material from Israel, Italy and Lebanon, as well as progeny of a selected New Zealand plant, showed more rapid recovery from drought stress and subsequently better winter growth than New Zealand commercial material ('Grasslands Huia'). The wider use of plant material of Mediterranean origin and of plants collected in New Zealand dryland pastures is advocated in development of clover cultivars for New Zealand dryland situations.

Evaluation of freezing tolerance in advanced progeny from a cross ofAvena sativaXA. macrostachya

2006 ◽  
Vol 34 (2-3) ◽  
pp. 1037-1042 ◽  
Author(s):  
Hongmei Jia ◽  
David Livingston ◽  
J. Murphy ◽  
David Porter
Keyword(s):  
Freezing Tolerance

Key facts on moderate to severe acute pain combined treatment with tramadol and dexketoprofen at fixed doses

2020 ◽  
Vol 13 (3) ◽  
pp. 304-310
Author(s):  
Jarosław Woroń
Keyword(s):  
Quality Of Life ◽  
Treatment Adherence ◽  
Acute Pain ◽  
Pain Treatment ◽  
Combined Treatment ◽  
Physiological Changes ◽  
Physiological Mechanisms ◽  
Pain Mechanisms ◽  
Proven Efficacy

The development of pain is associated with numerous physiological mechanisms. Improper acute pain treatment significantly reduces the quality of life and leads to a number of physiological changes that adversely affect the general condition of the patient. In many cases, inadequate analgesic therapy results in the transition from acute to chronic pain. For this reason, it is extremely important to use drugs that synergistically affect various pain mechanisms. Combined preparations, including the combination of tramadol and dexketoprofen, are very effective. This combination has many advantages, including proven efficacy and tolerability, ensures better treatment adherence and is easy to administer.

Agricultural practices of improve hardiness a winter-annual rape

2016 ◽  
Vol 2 (91) ◽  
pp. 57-62
Author(s):  
O.L. Kyrylesko
Keyword(s):  
Dry Matter ◽  
Agricultural Practices ◽  
Mineral Fertilizers ◽  
Farming Practices ◽  
Winter Rape ◽  
Output Capacity ◽  
Careful Preparation ◽  
Digestible Protein ◽  
Winter Annual ◽  
Selection Of

Influence of top-dressing is considered in the article, norms and terms of sowing on of winter-annual rape. The assessment conducted by the yield of green mass and seeds, output capacity by about 1 hectare of dry matter, feed units and digestible protein, the number of dead plants and density of herbage. Established that hardiness and productivity of winter rape can be enhanced through the use of farming practices as: by creating a moderate density of herbage, using optimal terms of planting and doses of mineral fertilizers, selection of predecessors and careful preparation of the soil ect. The mechanism of influence of agrotechnical receptions is exposed on of winter-annual rape through determination in roots before the offensive of the winter of separate biochemical indexes (sugar, starch, to protein).

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