Abstract
SUMMARY Topology is an important component of the architecture of whole root systems. Unfortunately, most commonly applied indices used for characterizing topology are poorly correlated with one another and thus reflect different aspects of topology. In order to understand better how different methods of characterizing topology vary, this paper presents an exploration of several different methods for assigning order within branched root systems on the basis of ( a ) developmental (centrifugal) vs. functional (centripetal) ordering sequences and ( b ) whether orders are assigned to individual links or groups of adjacent links (segments). For each ordering system, patterns of scaling in relation to various aspects of link and segment size are explored using regression analyses. Segment‐based ordering systems resulted in better fits for simple scaling relationships with size, but these patterns varied between developmental vs. functional ordering as well as the different size metrics examined. The functional (centripetal), link‐based ordering system showed complex, non‐linear scaling in relation to numbers of links per order. Using a simple simulation model of root growth, it is demonstrated that this method of characterizing root topology in relation to root size might be a more powerful tool for characterizing root system architecture than in the use of simple, single‐index characterizations of topology.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Common topology indices correlate poorly with one another.
Verbatim
e0“most commonly applied indices used for characterizing topology are poorly correlated with one another”
t0“plant root system”
Claim · model-written summary
Segment ordering gave better fits for simple scaling with size.
Not reportedComparator
Verbatim
e0“Segment‐based ordering systems resulted in better fits for simple scaling relationships with size”
t0“plant root system”
Claim · model-written summary
Scaling patterns varied by developmental versus functional order and size metric.
Verbatim
e0“these patterns varied between developmental vs. functional ordering as well as the different size metrics examined.”
t0“plant root system”
Claim · model-written summary
Functional link ordering showed nonlinear scaling with link counts.
Not reportedComparator
Verbatim
e0“The functional (centripetal), link‐based ordering system showed complex, non‐linear scaling in relation to numbers of links per order.”
t0“plant root system”
Claim · model-written summary
The simulated functional link-based metric may characterize root architecture more powerfully than single indices.
Verbatim
e0“this method of characterizing root topology in relation to root size might be a more powerful tool for characterizing root system architecture than in the use of simple, single‐index characterizations of topology.”