کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9490541 | 1629578 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Changes in the molecular composition of ester-bound aliphatics with depth in an acid andic forest soil
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Changes in the molecular composition of ester-bound aliphatics with depth in an acid andic forest soil Changes in the molecular composition of ester-bound aliphatics with depth in an acid andic forest soil](/preview/png/9490541.png)
چکیده انگلیسی
Changes in the molecular composition of ester-linked aliphatic compounds with depth in an acid andic forest soil are studied. Thermally assisted hydrolysis and methylation (THM) using tetramethylammonium hydroxide in combination with gas chromatography/mass spectrometry revealed a dominance of cutin over suberin-derived THM products in the top 5 cm. From 5 to 20 cm, a strong increase in the contribution of suberin-derived THM products was observed. From 20-50 cm, suberin-derived C22, C24 (and C26) Ï-hydroxy acids were found to decrease relatively strongly with depth compared with other suberin building-blocks. Their decrease with depth in the ester-bound fraction is 'reversely' linked with a strong increase of these compounds in the free extractable lipid fraction which would justify their use as main indicators of a root-derived input to the free extractable lipid fraction. In addition, their relatively strong decrease in the ester-bound fraction suggests that these compounds are more easily released from the suberin structure in soils than other ester-bound aliphatic building-blocks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 127, Issues 1â2, July 2005, Pages 130-136
Journal: Geoderma - Volume 127, Issues 1â2, July 2005, Pages 130-136
نویسندگان
Dennis F.W. Naafs, Klaas G.J. Nierop, Pim F. van Bergen, Jan W. de Leeuw,