Plant and Soil

pp 1–11

Intraspecific variation in morphological traits of root branch orders in Chamaecyparis obtusa

  • Ryuusei Doi
  • Toko Tanikawa
  • Kouhei Miyatani
  • Yasuhiro Hirano
Regular Article

DOI: 10.1007/s11104-017-3230-0

Cite this article as:
Doi, R., Tanikawa, T., Miyatani, K. et al. Plant Soil (2017). doi:10.1007/s11104-017-3230-0

Abstract

Aims

We aimed to clarify the intraspecific variation in the morphological traits of branch orders under different soil conditions in Chamaecyparis obtusa (Siebold & Zucc.) Endl.

Methods

We investigated the morphological traits of branch orders, based on 16,351 individual roots that were dissected from 12 intact fine root systems, up to a diameter of 2 mm at three C. obtusa stands. We also measured the concentrations of soil carbon, nitrogen, and inorganic nitrogen.

Results

The intact fine root systems up to the diameter of 2 mm had branched into between five and seven orders. The diameter of first- to fourth-order roots and the lengths of second- and third-order roots were significantly different among the three stands. The morphological traits of lower order (first to third) roots correlated with soil inorganic nitrogen concentrations, but higher order (fourth to sixth) roots correlated with soil carbon concentrations.

Conclusions

We clarified the possible ranges of intraspecific variation in the morphological traits of root branch orders within C. obtusa. Both the lower and higher orders of the intact fine root systems were tightly related to the surrounding soil conditions.

Keywords

Absorptive roots Fine roots Individual roots Root diameter Specific root length 

Abbreviations

ABC

Acid buffering capacity

C

Carbon

N

Nitrogen

NPP

Net primary productivity

Rb

Branching ratio

SRL

Specific root length

Copyright information

© Springer International Publishing Switzerland 2017

Authors and Affiliations

  • Ryuusei Doi
    • 1
  • Toko Tanikawa
    • 2
  • Kouhei Miyatani
    • 1
  • Yasuhiro Hirano
    • 1
  1. 1.Graduate School of Environmental StudiesNagoya UniversityNagoyaJapan
  2. 2.Kansai Research CenterForestry and Forest Products Research InstituteKyotoJapan

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