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Interspecific variation in fine-root morphology and function is well documented. However, very less information is available regarding variation among monoculture and mixed-species plantations in temperate species. Thus, the present study used such plantations to investigate how belowground interand intraspecific competition influence major fineroot traits of larch (Larix gmelinii) and Manchurian ash (Fraxinus mandshurica). Overall root morphology, anatomy, and chemistry differed between species and root order (1–5). Specific root length, nitrogen concentration, and cortex: stele ratio was significantly higher in Manchurian ash, whereas root tissue density, stele diameter, and C/N ratio were significantly higher in larch. Additionally, when comparing the two species in a mixed plantation, root C concentration differed significantly between larch and Manchurian ash, but only for the second root order. However, root traits were largely similar across species within a given root order. In conclusion, critical root traits did not exhibit major intraand interspecific differences, despite the ostensible presence of competition among tested plantations. Therefore, competition-induced root modification may not be a universal phenomenon in temperate trees.

the journal of animal and plant sciences/the japs

ROOT MORPHOLOGY AND CHEMISTRY IN MANCHURIAN ASH (FRAXINUS MANDSHURICA) AND LARCH (LARIX GMELINII RUPR.) ARE DEPENDENT ON SPECIES, ROOT ORDER AND COMPETITION