Dynamics of heterorhizic root systems: Protoxylem groups within the fine-root system of Chamaecyparis obtusa

Takuo Hishi, Hiroshi Takeda

研究成果: ジャーナルへの寄稿学術誌査読

67 被引用数 (Scopus)

抄録

• To understand the physiology of fine-root functions in relation to soil organic sources, the heterogeneity of individual root functions within a fine-root system requires investigation. Here the heterogeneous dynamics within fine-root systems are reported. • The fine roots of Chamaecyparis obtusa were sampled using a sequential ingrowth core method over 2 yr. After color categorization, roots were classified into protoxylem groups from anatomical observations. • The root lengths with diarch and triarch groups fluctuated seasonally, whereas the tetrarch root length increased. The percentage of secondary root mortality to total mortality increased with increasing amounts of protoxylem. The carbon : nitrogen ratio indicated that the decomposability of primary roots might be greater than that of secondary roots. The position of diarch roots was mostly apical, whereas tetrarch roots tended to be distributed in basal positions within the root architecture. • We demonstrate the heterogeneous dynamics within a fine-root system of C. obtusa. Fine-root heterogeneity should affect soil C dynamics. This heterogeneity is determined by the branching position within the root architecture.

本文言語英語
ページ(範囲)509-521
ページ数13
ジャーナルNew Phytologist
167
2
DOI
出版ステータス出版済み - 8月 2005
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 生理学
  • 植物科学

フィンガープリント

「Dynamics of heterorhizic root systems: Protoxylem groups within the fine-root system of Chamaecyparis obtusa」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル