Skip to Main Content
The influence of soil type and altered lignin biosynthesis on the physiology, growth and carbon allocation in Populus tremuloidesAuthor(s): Jessica E. Hancock; Kate L. Bradley; Christian P. Giardina; Kurt S. Pregitzer
Source: Plant and Soil 308: 239–253
Publication Series: Scientific Journal (JRNL)
PDF: View PDF (272.5 KB)
DescriptionPlants influence soil carbon (C) formation through the quality and quantity of C released to soil. Soil type, in turn can modify a plant's influence on soil through effects on plant production, tissue quality and regulation of soil C decomposition and stabilization. Wild-type aspen and three transgenic aspen lines expressing reduced stem lignin concentrations and/or increased syringyl (S) to guaiacyl (G) ratio lignin were grown in greenhouse mesocosms containing a sandy loam, a silt loam, or a clay loam soil for 6 months in order to examine the effects of altered lignin biosynthesis and soil type on biomass partitioning (above vs. belowground) and soil C processes. Results indicated that soil type significantly affected plant performance. Aspen grown in soils with high sand/ low clay content accumulated the most total biomass, while aspen grown in soils with high clay content accumulated the least total biomass. These reductions in growth combined with specific soil characteristics led to differences among soil types in soil C formation. Transformed aspen expressing high syringyl/guaiacyl (S/G) lignin accumulated less total plant C and subsequently accumulated less aspen derived C in soil. Reduced lignin content alone in aspen did not affect plant growth or soil C formation. There were significant soil type × genetic line interactions indicating that growth and soil C formation for transgenic and wild type aspen lines varied among the different soil types. Given these interactions, future investigation needs to include long-term field studies across a range of soil types before transgenic aspen are widely planted.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHancock, Jessica E.; Bradley, Kate L.; Giardina, Christian P.; Pregitzer, Kurt S. 2008. The influence of soil type and altered lignin biosynthesis on the physiology, growth and carbon allocation in Populus tremuloides. Plant and Soil 308: 239–253.
KeywordsBiomass allocation, Growth physiology, Plant productivity, Soil carbon formation, Soil texture, syringyl to guaiacyl ratio
- Plant growth, biomass partitioning and soil carbon formation in response to altered lignin biosynthesis in Populus tremuloides
- Soil microbial community responses to altered lignin biosynthesis in Populus tremuloides vary among three distinct soils
- Growth of nitrogen-fertilized and thinned quaking aspen (Populus tremuloides Michx.).
XML: View XML