From plant to soil: Quantitative changes in pine and juniper extractive compounds at diferent transformation stages
| Autor: | Cipriano Carrero-Carralero, Ana I. Ruiz-Matute, Jesús Sanz, Lourdes Ramos, María Luz Sanz, Gonzalo Almendros |
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| Přispěvatelé: | Consejo Superior de Investigaciones Científicas (España), Comunidad de Madrid |
| Rok vydání: | 2022 |
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| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Purpose The transformation of extractable plant compounds after their incorporation into soil was qualitatively and quantitatively studied in two forests under Juniperus communis L. and Pinus sylvestris L. Methods Leaf, litter and soil samples were taken from representative pine and juniper forests in central Spain. The lipid fraction was extracted with dichloromethane, while methanol was used for polar compounds, which were then derivatized (silylationoximation). Extracts were analyzed by gas chromatography-mass spectrometry. van Krevelen’s graphical-statistical method, enhanced as surface density maps, was used to study changes in molecular assemblages during their transformation from plant to soil. Shannon Wiener diversity indices were also determined for the main groups of molecules to quantify the progressive removal or the appearance of new compounds throughout the transformation. Results In the lipid fraction up to 126 compounds were identifed, mainly alkanes (C10–C30 in pine forest and C10–C36 in juniper forest), fatty acids and cyclic compounds. In the polar extracts, up to 22 compounds were found, mainly sugars, polyols, cyclic acids and fatty acids. Conclusion Comparing the successive stages of evolution of leaf extractive compounds, alkanoic acids and disaccharides tend to accumulate in the soil. On the other hand, the greatest molecular complexity was found in the intermediate stage (litter), and attributed to the coexistence of biogenic compounds with their transformation products, while the molecular complexity was simpler in soil extracts. This preliminary investigation could be extended to specifc studies on the factors that determine the quality of soil organic matter under diferent environmental scenarios. Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by the I+D+i project PID2019-106405GB-I00 financed by MCIN/AEI/https://doi.org/10.13039/5011000110 33 and the project 202080E216 funded by CSIC. Authors have received research support from the Comunidad of Madrid and European funding from FSE and FEDER programs (project S2018/BAA-4393, AVANSECAL-II-CM). |
| Databáze: | OpenAIRE |
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