NDLI: Assessment of the biochemical composition of oilseed rape (Brassica napus L.) 13C-labelled residues by global methods, FTIR and 13C NMR CP/MAS

Content Provider	Springer Nature Link
Author	Trinsoutrot, I. Jocteur Monrozier, L. Cellier, J. Waton, H. Alamercery, S. Nicolardot, B.
Copyright Year	2001
Abstract	The biochemical composition of stems, pod walls and roots of oilseed rape (Brassica napus L.) plants, grown in a growth chamber with two levels of N fertiliser, was assessed by two global methods, i.e., serial extraction with the Van Soest's technique and temperature-programmed pyroanalysis (TP-Py). Statistical analysis of the effect of various parameters on the proportion of soluble components, hemicellulose, cellulose and lignin-like components in oilseed rape organs showed that the composition of plant materials depended on the N nutrition conditions during plant growth. Contents of soluble and hemicellulose fractions were affected by the technique used. Elsewhere, both global techniques resulted in similar proportions of skeletal cellulose (respectively 41 and 36% in low and high N stems, 37 and 30% in low and high N pod walls, 32 and 29% in low and high N roots) and of lignin-like components which ranged from about 7% in high N stems and pod walls to 16% in low N roots. Spectroscopy by FTIR showed a significant band at 1650 cm$^{−1}$ (amide I in proteins) in the root material (organ with the lowest C/N ratio) and the absence of lignin-specific bands. Carbon distribution by $^{13}$C NMR CP/MAS of labelled plants indicated that 60–64% was (cellulose + hemicellulose)-C, close to the values obtained by global methods. The proportion of aromatic-C (110–160 ppm) and phenolic ether was higher in roots than in stems and pod walls. Organs from oilseed rape plants with higher N contents exhibited a larger proportion of C in the 171 ppm chemical shift attributed to the peptide bond. The concomitance of a high level of aromatic and proteinaceous components in roots would reveal the presence of tannin–protein complexes in addition with true lignin.
Starting Page	61
Ending Page	72
Page Count	12
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	234
Issue Number	1
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2001-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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