2015
DOI: 10.1111/nph.13363
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Redefining fine roots improves understanding of below‐ground contributions to terrestrial biosphere processes

Abstract: 505I.506II.506III.508IV.512V.513VI.514515References515 Summary Fine roots acquire essential soil resources and mediate biogeochemical cycling in terrestrial ecosystems. Estimates of carbon and nutrient allocation to build and maintain these structures remain uncertain because of the challenges of consistently measuring and interpreting fine‐root systems. Traditionally, fine roots have been defined as all roots ≤ 2 mm in diameter, yet it is now recognized that this approach fails to capture the diversity of f… Show more

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Cited by 1,061 publications
(1,109 citation statements)
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References 111 publications
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“…This concept is similar to the functional fine root orders proposed by McCormack et al (2015) which separated fine roots into two pools: a short lived absorptive pool and a longer-lived transport pool. Absorptive roots are distinguished by their high surface area to volume ratio, high mycorrhizal colonization, high root hair density, less suberization, greater respiration, greater tissue nitrogen concentration, and an intact cortex.…”
Section: Research Prospectsmentioning
confidence: 81%
See 1 more Smart Citation
“…This concept is similar to the functional fine root orders proposed by McCormack et al (2015) which separated fine roots into two pools: a short lived absorptive pool and a longer-lived transport pool. Absorptive roots are distinguished by their high surface area to volume ratio, high mycorrhizal colonization, high root hair density, less suberization, greater respiration, greater tissue nitrogen concentration, and an intact cortex.…”
Section: Research Prospectsmentioning
confidence: 81%
“…Absorptive roots are distinguished by their high surface area to volume ratio, high mycorrhizal colonization, high root hair density, less suberization, greater respiration, greater tissue nitrogen concentration, and an intact cortex. Transport roots are distinguished by the high stele to diameter ratio, mature xylem conduits, the loss of the root cortex, and high suberization and lignification (McCormack et al 2015). We propose that these concepts not only apply to fine roots of perennial species but may be applicable to annual species, particularly those which develop RCS.…”
Section: Research Prospectsmentioning
confidence: 99%
“…In woody species, a hierarchical root system is common and clear. It has been found that only the most distal one to three orders primarily serve resource acquisition functions (Guo et al., 2008; McCormack et al., 2015). However, the absorbing region of nonwoody species could be nearly as great as the extent of the root systems, which is largely different from the hierarchical branching architecture in woody plants.…”
Section: Discussionmentioning
confidence: 99%
“…The degree of ramification is determined by both plant and fungal identity. The formation of bifurcate, Y-shaped mycorrhizas is only observed in gymnosperms (McCormack et al 2015). (Smith & Read 2008) …”
Section: Mycorrhizal Status and Morphotype Of Mycorrhizal Root Tipsmentioning
confidence: 99%