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Five willow varieties cultivated across diverse field environments reveal stem density variation associated with high tension wood abundance

View Article: PubMed Central

ABSTRACT

Sustainable and inexpensive production of biomass is necessary to make biofuel production feasible, but represents a challenge. Five short rotation coppice willow cultivars, selected for high biomass yield, were cultivated on sites at four diverse regions of Quebec in contrasting environments. Wood composition and anatomical traits were characterized. Tree height and stem diameter were measured to evaluate growth performance of the cultivars according to the diverse pedoclimatic conditions. Each cultivar showed very specific responses to its environment. While no significant variation in lignin content was observed between sites, there was variation between cultivars. Surprisingly, the pattern of substantial genotype variability in stem density was maintained across all sites. However, wood anatomy did differ between sites in a cultivar (producing high and low density wood), suggesting a probable response to an abiotic stress. Furthermore, twice as many cellulose-rich G-fibers, comprising over 50% of secondary xylem, were also found in the high density wood, a finding with potential to bring higher value to the lignocellulosic bioethanol industry.

No MeSH data available.


Site localization in Québec province, Canada: Saint-Roch-de-l′Achigan (SR), Beloeil (B), Saint-Siméon (S-S), and La Pocatière (LP).
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Figure 1: Site localization in Québec province, Canada: Saint-Roch-de-l′Achigan (SR), Beloeil (B), Saint-Siméon (S-S), and La Pocatière (LP).

Mentions: The willow plantations were established in the spring of 2011 by the Réseau des Plantes Bio-industrielles du Québec (RPBQ), a network to develop bio-industrial crops in the Province of Québec (Canada). The experiments were carried out at four sites representing a range of environmental conditions along the Saint Lawrence River near the communities of Beloeil (B) 45°35′32.8 N – 73°14′46.7 W, Saint-Roch-de-l′Achigan (SR) 45°48′56.5 N – 73°39′08.8 W, La Pocatière (LP) 47°21′05.1 N – 70°01′35.6 W. and Saint-Siméon (SS) 48°05′11.2 N – 65°35′11.1 W (Figure 1).


Five willow varieties cultivated across diverse field environments reveal stem density variation associated with high tension wood abundance
Site localization in Québec province, Canada: Saint-Roch-de-l′Achigan (SR), Beloeil (B), Saint-Siméon (S-S), and La Pocatière (LP).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4628129&req=5

Figure 1: Site localization in Québec province, Canada: Saint-Roch-de-l′Achigan (SR), Beloeil (B), Saint-Siméon (S-S), and La Pocatière (LP).
Mentions: The willow plantations were established in the spring of 2011 by the Réseau des Plantes Bio-industrielles du Québec (RPBQ), a network to develop bio-industrial crops in the Province of Québec (Canada). The experiments were carried out at four sites representing a range of environmental conditions along the Saint Lawrence River near the communities of Beloeil (B) 45°35′32.8 N – 73°14′46.7 W, Saint-Roch-de-l′Achigan (SR) 45°48′56.5 N – 73°39′08.8 W, La Pocatière (LP) 47°21′05.1 N – 70°01′35.6 W. and Saint-Siméon (SS) 48°05′11.2 N – 65°35′11.1 W (Figure 1).

View Article: PubMed Central

ABSTRACT

Sustainable and inexpensive production of biomass is necessary to make biofuel production feasible, but represents a challenge. Five short rotation coppice willow cultivars, selected for high biomass yield, were cultivated on sites at four diverse regions of Quebec in contrasting environments. Wood composition and anatomical traits were characterized. Tree height and stem diameter were measured to evaluate growth performance of the cultivars according to the diverse pedoclimatic conditions. Each cultivar showed very specific responses to its environment. While no significant variation in lignin content was observed between sites, there was variation between cultivars. Surprisingly, the pattern of substantial genotype variability in stem density was maintained across all sites. However, wood anatomy did differ between sites in a cultivar (producing high and low density wood), suggesting a probable response to an abiotic stress. Furthermore, twice as many cellulose-rich G-fibers, comprising over 50% of secondary xylem, were also found in the high density wood, a finding with potential to bring higher value to the lignocellulosic bioethanol industry.

No MeSH data available.