scholarly journals Genetic variation of xylem hydraulic properties shows that wood density is involved in adaptation to drought in Douglas-fir (Pseudotsuga menziesii (Mirb.))

2011 ◽  
Vol 68 (4) ◽  
pp. 747-757 ◽  
Author(s):  
Guillermina Dalla-Salda ◽  
Alejandro Martinez-Meier ◽  
Hervé Cochard ◽  
Philippe Rozenberg
Keyword(s):  
Genetic Variation ◽  
Wood Density ◽  
Pseudotsuga Menziesii ◽  
Hydraulic Properties ◽  
Douglas Fir ◽  
Adaptation To Drought

scholarly journals Analyse rétrospective de l'adaptation à la sécheresse chez le douglas

2012 ◽  
Vol 163 (3) ◽  
pp. 88-95 ◽  
Author(s):  
Philippe Rozenberg ◽  
Anne-Sophie Sergent ◽  
Guillermina Dalla-Salda ◽  
Alejandro Martinez-Meier ◽  
Sara Marin ◽  
...  
Keyword(s):  
Retrospective Analysis ◽  
Water Deficit ◽  
Wood Density ◽  
Pseudotsuga Menziesii ◽  
Hydraulic Properties ◽  
Douglas Fir ◽  
Ecological Preferences ◽  
Significant Relationships ◽  
Dry Conditions ◽  
The Relationship

Retrospective analysis of the adaptation of the Douglas-fir to drought For a number of years in certain regions of France the Douglas-fir trees (Pseudotsuga menziesii [Mirb.] Franco) have presented symptoms of withering which have been attributed to drought. Our results show that the hydraulic function of the wood plays a part in the resistance of the Douglas-fir to dry conditions. Narrower cellular conduits, and therefore a greater wood density, contribute to the survival of trees confronted with a period of a marked water deficit. This idea is confirmed by the existence of significant relationships between wood density and hydraulic properties of wood in which the raw sap circulates, and also by the relationships found between the ecological preferences of specimens in their area of origin and the density of their wood in regions of France where they have been introduced. Those coming from dry regions have a tendency to develop wood with characteristics similar to that of trees which have survived drought. While the relationship between wood density and survival has been demonstrated, the differences in the nature of this relationship between different sites show that the mechanisms involved are complex and to a large extent still not understood.

Climate-related genetic variation in drought-resistance of Douglas-fir (Pseudotsuga menziesii)

2014 ◽  
Vol 21 (2) ◽  
pp. 947-958 ◽  
Author(s):  
Sheel Bansal ◽  
Constance A. Harrington ◽  
Peter J. Gould ◽  
J. Bradley St.Clair
Keyword(s):  
Genetic Variation ◽  
Pseudotsuga Menziesii ◽  
Drought Resistance ◽  
Douglas Fir

Genetic variation in tree structure and its relation to size in Douglas-fir. I. Biomass partitioning, foliage efficiency, stem form, and wood density

1994 ◽  
Vol 24 (6) ◽  
pp. 1226-1235 ◽  
Author(s):  
J. B. St.Clair
Keyword(s):  
Genetic Variation ◽  
Leaf Area ◽  
Wood Density ◽  
Harvest Index ◽  
Genetic Correlations ◽  
Douglas Fir ◽  
Biomass Partitioning ◽  
Alternative Measure ◽  
Sapwood Area ◽  
Stem Size

Genetic variation and covariation among traits of tree size and structure were assessed in an 18-year-old Douglas-fir (Pseudotsugamenziesii var. menziesii (Mirb.) Franco) genetic test in the Coast Range of Oregon. Considerable genetic variation was found in size, biomass partitioning, and wood density, and genetic gains may be expected from selection and breeding of desirable genotypes. Estimates of heritability for partitioning traits, including harvest index, were particularly high. Foliage efficiency (stem increment per unit leaf area) was strongly correlated with harvest index and may represent an alternative measure of partitioning to the stem. Estimates of foliage efficiency where leaf area was estimated based on stem diameter or sapwood area were unrelated to foliage efficiency where leaf area was measured directly. Strong negative genetic correlations were found between harvest index and stem size, and between wood density and stem size. Achieving simultaneous genetic gain in stem size and either harvest index or wood density would be difficult.

Ecological Adaptations in Douglas-fir (Pseudotsuga menziesii var. glauca). IV. Montana and Idaho Near the Continental Divide

1988 ◽  
Vol 3 (4) ◽  
pp. 101-105 ◽  
Author(s):  
G. E. Rehfeldt
Keyword(s):  
Genetic Variation ◽  
Pseudotsuga Menziesii ◽  
Finite Length ◽  
Growing Season ◽  
Douglas Fir ◽  
Genetic Differences ◽  
Seed Source ◽  
Developmental Cycle ◽  
Ecological Adaptations ◽  
Continental Divide

Abstract Seventy-seven seedling populations of Douglas-fir (Pseudotsuga menziesii var. glauca) sampled from near the Continental Divide in Idaho and Montana exhibited pronounced genetic differences when compared in three common environments. Differentiation involved several traits that are components of an annual developmental cycle that must be completed within a growing season of finite length. Consequently, the elevational and geographic dines of genetic variation tend to parallel variation in the length of the growing season at the seed source. Such clines suggest that maladaptation in artificial reforestation can be controlled by limiting the transfer of seeds. While geographic transfers can be relatively liberal, elevational transfers should be limited to ±90 m (300 ft) from the seed source at elevations below 1,400 m (4,600 ft), to ±125 m (410 ft) for elevations between 1,400 and 2,000 m (4,600 and 6,550 ft), and ±200 m (560 ft) for elevations above 2,000 m (6,550 ft). West. J. Appl. For. 3(4):101-105, October 1988.

scholarly journals Wood density proxies of adaptive traits linked with resistance to drought in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)

Trees ◽  
2014 ◽  
Vol 28 (5) ◽  
pp. 1289-1304 ◽  
Author(s):  
Manuela Ruiz Diaz Britez ◽  
Anne-Sophie Sergent ◽  
Alejandro Martinez Meier ◽  
Nathalie Bréda ◽  
Philippe Rozenberg
Keyword(s):  
Wood Density ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Adaptive Traits

Incorporating genetic variation into a model of budburst phenology of coast Douglas-fir (Pseudotsuga menziesii var. menziesii)

2011 ◽  
Vol 41 (1) ◽  
pp. 139-150 ◽  
Author(s):  
Peter J. Gould ◽  
Constance A. Harrington ◽  
J. Bradley St. Clair
Keyword(s):  
Climate Change ◽  
Genetic Variation ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Mitigation Strategies ◽  
Summer Drought ◽  
Clinal Variation ◽  
Local Environments ◽  
Main Components ◽  
Chilling Units

Models to predict budburst and other phenological events in plants are needed to forecast how climate change may impact ecosystems and for the development of mitigation strategies. Differences among genotypes are important to predicting phenological events in species that show strong clinal variation in adaptive traits. We present a model that incorporates the effects of temperature and differences among genotypes to predict the timing of budburst of coast Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco). The main components of the model are (i) functions to calculate the accumulation of chilling units (CU) and forcing units (FU) during dormancy and (ii) a function defining the combinations of CU and FU needed for budburst (the possibility line). The possibility line was fit to data from 59 populations subjected to eight different winter environments. Differences among populations were incorporated into the possibility line using population coefficients that vary the FU required for budburst. Correlations among the population coefficients and variables describing local environments supported the hypothesis that genetic variation in budburst is largely an adaptation to summer drought. The new model can be used to test potential seed transfers as a strategy to mitigate some of the effects of climate change.

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