Five willow varieties cultivated across diverse field environments reveal stem density variation associated with high tension wood abundance.
Five willow varieties cultivated across diverse field environments reveal stem density variation associated with high tension wood abundance.
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DOI：
10.3389/fpls.2015.00948
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发表时间：
2015
影响因子：
5.6
通讯作者：
Labrecque M
中科院分区：
文献类型：
--
作者：
Berthod N;Brereton NJ;Pitre FE;Labrecque M
可持续和廉价的生物质生产是使生物燃料生产可行的必要条件，但也是一个挑战。在魁北克省四个不同地区的不同环境中，选择了五种高生物量产量的短轮作灌木柳树品种。对木材组成和解剖特征进行了表征。根据不同的气候条件，测定了不同品种的树高和茎粗，评价了不同品种的生长性能。每个品种对其环境表现出非常特殊的反应。不同地点间木质素含量无显著差异，但品种间存在差异。令人惊讶的是，在所有位点上，茎密度的基因型变异模式都保持不变。然而，木材解剖结构在不同地点（生产高密度和低密度木材）之间确实存在差异，这表明可能是对非生物胁迫的反应。此外，高密度木材中还发现了两倍的富含纤维素的g纤维，占次生木质部的50%以上，这一发现有可能为木质纤维素生物乙醇工业带来更高的价值。
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.