Lumbricus terrestris counteract the effects of modified lignin biosynthesis on the decomposition of tobacco plant residues

D. W. Hopkins*, S. Marinari, E. L. Tilston, C. Halpin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The C and N transformations during decomposition over 26 d of root material from two lines of tobacco plants (Nicotiana tabacum L.) were compared in soil with or without earthworms (Lumbricus terrestris L.). The tobacco plants were either unmodified or genetically modified to reduce the activity of caffeic acid O-methyl transferase (COMT), which leads to plants with altered lignin structure and composition. In the absence of earthworms, C mineralization and net N immobilization were greater for the soil amended with reduced COMT roots than with the unmodified roots. In the presence of earthworms, C mineralization was still significantly greater for reduced COMT roots than for unmodified roots, but the difference was smaller, and the net N immobilization did not differ significantly between the two lines of plants.

Original languageEnglish
Pages (from-to)1141-1144
Number of pages4
JournalSoil Biology and Biochemistry
Volume37
Issue number6
DOIs
Publication statusPrint publication - Jun 2005
Externally publishedYes

Keywords

  • Decomposition
  • Earthworms
  • Genetic modification
  • Lignin
  • Microbial biomass
  • Nitrogen immobilization/mineralization
  • Tobacco

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