Changes in the lignin fraction of spruce and pine needle litter during decomposition as studied by some chemical methods |
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| Institution: | 1. Department of Applied Microbiology and Mushroom Science, Forestry & Forest Products Research Institute, Matsunosato 1, Tsukuba 305-8687, Japan;2. Department of Bioscience and Biotechnology, Faculty of Agriculture, Shinshu University, Minami-minowa, Nagano 399-4598, Japan;3. Department of Molecular Cell Biology, Forestry & Forest Products Research Institute, Matsunosato 1, Tsukuba 305-8687, Japan;1. Department of Applied Microbiology and Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Republic of Korea;2. Department of Biotechnology, Daegu University, Gyeongsan, Gyeongbuk 712-714, Republic of Korea;1. Department of Ecology, Jinan University, Guangzhou 510632, PR China;2. Engineering Research Center for Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou 510632, PR China;3. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Engineering Research Center for Non-point Source Pollution Control, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, PR China;1. Université de Toulouse, INPT, UPS, IMFT (Institut de Mécanique des Fluides de Toulouse), 31400 Toulouse, France;2. Institut Pprime, CNRS, SP2MI, BP 30179, 86962 Futuroscope Cedex, France;1. CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, University of Science and Technology of China, Hefei, Anhui 230027, China;2. Hefei National Laboratory for Physical Sciences at Microscale, Hefei, Anhui 230027, China |
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| Abstract: | Changes in the lignin fraction of spruce and pine needle litter were followed by four different methods: Klason lignin, phloroglucinol lignin, dioxane-water-HCl-lignin and alkaline CuO oxidation. The decomposition patterns of the lignins studied were different, the largest differences between the methods being obtained for the spruce needles. Depending on the method used, between 36 and 46% of the original amount of lignin remained in the pine needles and about 30–61% in the spruce needles after 3 yr of decomposition. The decomposition rates of the various lignin pools were highly correlated with the loss in mass of the litter. The phloroglucinol lignin was decomposed significantly faster (P < 0.001) in the spruce needles than in the pine needles for as long as the decomposition process was followed. During decomposition of the litter, the residual amount of Klason lignin was correlated with the residual amounts of the other lignins. The application of the different methods to litter decomposition studies is discussed. |
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