Influence of Cambial Age and Growth Conditions on Microfibril Angle in Young Norway Spruce(Picea abies[L.] Karst.)

Volatile piperidine alkaloids are widespread compounds found in low amounts in coniferous species. Here, we investigated the variation of piperidine alkaloid chemistry of Norway spruce (Picea abies (L.) Karst.) in a provenance-type experiment. Volatile piperidine alkaloids were analysed from current-year mature needles of 12 geographical origins grown for 35 years at the same site. Results indicate that, despite long-lasting similar growth conditions, origins were still showing different alkaloid composition and concentrations, indicating solid genotype variation. The highest total piperidine alkaloid concentrations were detected in the northernmost origins, and a marked positive correlation between piperidine alkaloid concentrations and latitude was found. Positive correlation with latitude seems to be closely linked to negative correlation with annual temperature sum of origins. Interestingly, the changes in concentrations detected were not related to needle size and dilution effect. Regarding the possible herbivore-defense role of P. abies piperidine alkaloids, the high variation between origins could play a role for preventing the invasion of genotypes from different geographical areas.

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Genetic control of transition from juvenile to mature wood with respect to microfibril angle in Norway spruce (Picea abies) and lodgepole pine (Pinus contorta)

Canadian Journal of Forest Research ◽

10.1139/cjfr-2018-0140 ◽

2018 ◽

Vol 48 (11) ◽

pp. 1358-1365 ◽

Cited By ~ 4

Author(s):

Haleh Hayatgheibi ◽

Nils Erik Gustaf Forsberg ◽

Sven-Olof Lundqvist ◽

Tommy Mörling ◽

Ewa J. Mellerowicz ◽

...

Keyword(s):

Picea Abies ◽

Genetic Control ◽

Norway Spruce ◽

Pinus Contorta ◽

Juvenile Wood ◽

Lodgepole Pine ◽

Microfibril Angle ◽

Mature Wood ◽

Direct Selection ◽

Narrow Sense Heritability

Genetic control of microfibril angle (MFA) transition from juvenile wood to mature wood was evaluated in Norway spruce (Picea abies (L.) Karst) and lodgepole pine (Pinus contorta Douglas ex Loudon). Increment cores were collected at breast height (1.3 m) from 5664 trees in two 21-year-old Norway spruce progeny trials in southern Sweden and from 823 trees in two lodgepole pine progeny trials, aged 34–35 years, in northern Sweden. Radial variations in MFA from pith to bark were measured for each core using SilviScan. To estimate MFA transition from juvenile wood to mature wood, a threshold level of MFA 20° was considered, and six different regression functions were fitted to the MFA profile of each tree after exclusion of outliers, following three steps. The narrow-sense heritability estimates (h2) obtained for MFA transition were highest based on the slope function, ranging from 0.21 to 0.23 for Norway spruce and from 0.34 to 0.53 for lodgepole pine, while h2 were mostly non-significant based on the logistic function, under all exclusion methods. Results of this study indicate that it is possible to select for an earlier MFA transition from juvenile wood to mature wood in Norway spruce and lodgepole pine selective breeding programs, as the genetic gains (ΔG) obtained in direct selection of this trait were very high in both species.

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Effect of ring width, cambial age, and climatic variables on the within-ring wood density profile of Norway spruce Picea abies (L.) Karst.

Trees ◽

10.1007/s00468-013-0844-6 ◽

2013 ◽

Vol 27 (4) ◽

pp. 913-925 ◽

Cited By ~ 35

Author(s):

Tony Franceschini ◽

Fleur Longuetaud ◽

Jean-Daniel Bontemps ◽

Olivier Bouriaud ◽

Benoît-Damien Caritey ◽

...

Keyword(s):

Picea Abies ◽

Norway Spruce ◽

Wood Density ◽

Density Profile ◽

Ring Width ◽

Climatic Variables ◽

Cambial Age

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Inter-Tracheid and Cross-Field Pitting in Compression Wood and Opposite Wood of Norway Spruce (Picea abies L.)

Notulae Scientia Biologicae ◽

10.15835/nsb326059 ◽

2011 ◽

Vol 3 (2) ◽

pp. 145-151 ◽

Cited By ~ 4

Author(s):

Asghar TARMIAN ◽

Mohammad AZADFALLAH ◽

Hadi GHOLAMIYAN ◽

Mahdi SHAHVERDI

Keyword(s):

Picea Abies ◽

Norway Spruce ◽

Compression Wood ◽

Microfibril Angle ◽

Air Permeability ◽

Sem Images ◽

Aperture Diameter ◽

Opposite Wood ◽

Bordered Pits ◽

S2 Layer

Inter-tracheid and cross-filed pit specifications in compression wood and opposite wood of Norway spruce (Picea abies) were determined. Fewer pits of a smaller size and a smaller aperture diameter were observed in compression wood. In contrast to the uniseriate arrangement of bordered pit pairs in compression wood, both uniseriate and biseriate pits were observed in opposite wood. In contrast to the circular view of the pit aperture in opposite wood, a slit-like pit aperture was often observed in compression wood. SEM images showed a number of helical fissures on the tracheid walls and bordered pits of compression wood along the microfibril angle in the S2 layer. The cross-field pits in compression wood were dominantly piceoid but sometimes cupressoid and occasionally taxodioid, whereas they were mostly piceoid and occasionally cupressoid in opposite wood. Overall, some significant differences in the inter-tracheid and cross-field pitting between the compression wood and opposite wood can give some explanations for their different air permeability and drying kinetics found in the previous studies.

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Tracheid dimensions of Norway spruce in uneven-aged stands

Canadian Journal of Forest Research ◽

10.1139/cjfr-2021-0140 ◽

2021 ◽

Author(s):

Jiri Pyörälä ◽

Riikka Piispanen ◽

Sauli Valkonen ◽

Sven-Olof Lundqvist

Keyword(s):

Picea Abies ◽

Norway Spruce ◽

Significant Influence ◽

Annual Ring ◽

Early Years ◽

Tree Diameter ◽

Ring Number ◽

Tracheid Length ◽

Cambial Age ◽

Main Factors

Tracheid length and width patterns from pith to bark at a height of 0.6 m in uneven-aged Norway spruce (<i>Picea abies</i> L. (H.) Karst) trees were addressed. The identification of the main factors and a comparison with even-aged stands were also pursued. 96 trees were sampled from experimental stands in Southern Finland. The material encompassed the variation in tracheid properties from early years to silvicultural maturity, i.e. from corewood to outerwood up to a cambial age of 111 years. Data from 39 Norway spruce trees from even-aged stands we utilized for comparison. Models fitted to the data indicated that annual ring widths did not influence mean tracheid dimensions but the latewood proportion showed a significant influence on tracheid dimensions. Tracheids in uneven-aged stands were slightly wider and longer at the base of the stem with a similar tree diameter, cambial age, and annual ring number.

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