caa a22 4500 606217568 CHVBK 20210128101108.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s11104-015-2461-1 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2461-1 Marked differences in standing biomass, length density, anatomy and physiological activity between white and brown roots in Fraxinus mandshurica Rupr. plantation [Elektronische Daten] [Jiacun Gu, Xing Wei, Jing Wang, Xueyun Dong, Zhengquan Wang] Aims: Root browning is closely related to physiological function, but the dynamic and underlying mechanism are poorly understood. Our objective was to explore the interrelationship between root browning, in the context of root branch order, and standing biomass, root length density, and soil resources availability at the ecosystem level. Methods: We measured the standing biomass and length density of white, brown and black roots of the first three branch orders in Fraxinus mandshurica Rupr.. Root anatomy, morphology, physiological activity, as well as soil total available nitrogen, moisture, and temperature were also determined. Results: White roots had longer specific root length, higher physiological activity, and intact cortex compared with brown roots. Grand means of biomass and length density in white roots were 5.6-fold and 4.4-fold higher than those in brown roots, respectively. Sampling time, soil depth, and branch order generally had significant effects on the biomass and length density of both white and brown roots. In addition, sampling time consistently had significant effects on the brown to white root ratio, whereas the ratio was only moderately correlated with soil temperature. Conclusions: Root browning has pronounced impacts on tree root resource acquisition and belowground carbon allocation in F. mandshurica at both individual root and ecosystem levels. Springer International Publishing Switzerland, 2015 Branch order nationallicence Fine root nationallicence Functional traits nationallicence Root biomass nationallicence Root pigmentation nationallicence Gu Jiacun School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut Wei Xing School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut Wang Jing School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut Dong Xueyun School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut Wang Zhengquan School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 267-277 0032-079X 392:1-2<267 2015 392 11104 https://doi.org/10.1007/s11104-015-2461-1 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/s11104-015-2461-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gu Jiacun School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut NATIONALLICENCE 700 1- Wei Xing School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut NATIONALLICENCE 700 1- Wang Jing School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut NATIONALLICENCE 700 1- Dong Xueyun School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut NATIONALLICENCE 700 1- Wang Zhengquan School of Forestry, Northeast Forestry University, 150040, Harbin, People's Republic of China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 392/1-2(2015-07-01), 267-277 0032-079X 392:1-2<267 2015 392 11104