Abstract：
:Alkaline nitrobenzene oxidation, ozonation and methoxyl content determinations were applied to decomposing leaf litter of Ginkgo biloba L., Cinnamomum camphora sieb., Zelkova serrata Makino and Firmiana simplex W. F. Wight, respectively, during mulching to investigate the properties and estimate changes in lignin composition and content. Since the Klason lignin residue originated from components highly resistant to degradation by acid, the methoxyl content of Klason residue was used to estimate the lignin content of leaf litter. Quantitative analysis of presumed lignin-derived fragments, by use of alkaline nitrobenzene oxidation and ozonation methods, suggested that the estimated lignin content approximates that of the real lignin content of leaves, which is greatly overestimated by the Klason procedure. The estimated lignin contents ranged from 3.9 to 10.0% while the Klason lignan residue varied from 37.1 to 46.7% in un-mulched leaf litter. The absolute amounts of the measured lignin somewhat decreased during mulching, while the structure of lignin remaining in leaf litters after mulching was considered not to be very different from its original structure.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Jin Z,Akiyama T,Chung BY,Matsumoto Y,Iiyama K,Watanabe Sdoi
10.1016/s0031-9422(03)00423-0subject
Has Abstractpub_date
2003-11-01 00:00:00pages
1023-31issue
5eissn
0031-9422issn
1873-3700pii
S0031942203004230journal_volume
64pub_type
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