caa a22 4500 378891944 CHVBK 20180305123456.0 cr unu---uuuuu 161128e20040315xx s 000 0 eng 10.1515/HF.2004.015 doi (NATIONALLICENCE)gruyter-10.1515/HF.2004.015 Variation in content and composition of lignin in young wood of Norway spruce [Elektronische Daten] [J. Wadenbäck, D. Clapham, G. Gellerstedt, S. von Arnold] Lignin content and composition are important traits in several tree breeding programs, but very little is known about their natural variation. This study compares the lignin content in 1-year-old plants and 9-year-old trees of Norway spruce belonging to the same full-sib families. It is shown that the lignin content, according to the modified acetyl bromide method, does not vary significantly within or among the different full-sib families either as plants or as young trees. There is, however, on average 4.0% higher lignin content (31.4% versus 27.4%) and lower standard error for the trees than for the plants. The number of C9-units g−1 lignin, analyzed by thioacidolysis, ranges from 516 to 1186 μmmol C9-units g−1 lignin in plants and from 716 to 953 μmmol C9-units g−1 lignin in trees, with no significant differences among the families. However, the extent of change in C9-units g−1 lignin varies among the families with age. The ratio of erythro and threo stereoisomers does not vary significantly among the families. However, the ratio changes differently with age among the families similar to the C9-units g−1 lignin. Additionally, the content of p-hydroxyphenyl (H) lignin is 0.6% higher in the trees than in the plants (1.4% versus 0.8%), estimated indirectly from GC-MS data by a novel subtractive technique, indicating a higher degree of compression wood in the young trees. In conclusion, the amount and composition of lignin does not vary within or among the families at the same age. However, the amount of lignin increases with age while the change in lignin composition varies between family and age. Copyright © 2004 by Walter de Gruyter GmbH & Co. KG Timber & wood processing nationallicence Biotechnology nationallicence Materials science nationallicence Wadenbäck J. aut Clapham D. aut Gellerstedt G. aut von Arnold S. aut Holzforschung Walter de Gruyter 58/2(2004-03-15), 107-115 0018-3830 58:2<107 2004 58 hfsg https://doi.org/10.1515/HF.2004.015 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/HF.2004.015 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wadenbäck J. aut NATIONALLICENCE 700 1- Clapham D. aut NATIONALLICENCE 700 1- Gellerstedt G. aut NATIONALLICENCE 700 1- von Arnold S. aut NATIONALLICENCE 773 0- Holzforschung Walter de Gruyter 58/2(2004-03-15), 107-115 0018-3830 58:2<107 2004 58 hfsg CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter