caa a22 4500 606217762 CHVBK 20210128101109.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s11104-015-2465-x doi (NATIONALLICENCE)springer-10.1007/s11104-015-2465-x On the controls of root lifespan: assessing the role of soluble phenolics [Elektronische Daten] [Thomas Adams, David Eissenstat] Aims: In addition to multiple above- and belowground abiotic factors, root herbivory can be an important determinant of root lifespan. In this study, we investigated the relationship between fine-root soluble phenolic content, a putative measure of chemical defense against herbivory, and explicit factors that have previously been related to fine-root lifespan. We hypothesized that fine-root soluble phenolic content would be positively related to factors previously shownto be correlated with increased root lifespan. Methods: In a common garden, utilizing nine temperate trees species, we examined the relationship between fine-root soluble phenolic content and fine-root branching order, diameter, rooting depth, localized nitrogen availability, and tree growth rate. Results: Consistent with our hypothesis, fine-root soluble phenolic content significantly increased with increasing branching order (P < 0.001). However, phenolic content significantly decreased with increasing localized N enrichment (P = 0.002), despite previous work indicating increased lifespan in N-enriched patches. We found no other significant relationships between fine-root soluble phenolic content and any of the other factors investigated. Conclusions: While this study provides detailed information about sources of variation in soluble phenolic content in roots, we were unable to find general utility in using a Folin-Denis based soluble-phenolic assay to increase our understanding of the factors associated with fine-root lifespan. Springer International Publishing Switzerland, 2015 Root lifespan nationallicence Soluble phenolics nationallicence Herbivory nationallicence Chemical defense nationallicence Adams Thomas Department of Ecosystem Science and Management and the Ecology Graduate Program, the Pennsylvania State University, 201 Forest Resources Building, 16802, University Park, PA, USA aut Eissenstat David Department of Ecosystem Science and Management and the Ecology Graduate Program, the Pennsylvania State University, 201 Forest Resources Building, 16802, University Park, PA, USA aut Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 301-308 0032-079X 392:1-2<301 2015 392 11104 https://doi.org/10.1007/s11104-015-2465-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2465-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Adams Thomas Department of Ecosystem Science and Management and the Ecology Graduate Program, the Pennsylvania State University, 201 Forest Resources Building, 16802, University Park, PA, USA aut NATIONALLICENCE 700 1- Eissenstat David Department of Ecosystem Science and Management and the Ecology Graduate Program, the Pennsylvania State University, 201 Forest Resources Building, 16802, University Park, PA, USA aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 301-308 0032-079X 392:1-2<301 2015 392 11104