Problems on Variation in Root Diameter

Minimum-diameter covering problems

A set V and a collection of (possibly non-disjoint) subsets are given. Also given is a real matrix describing distances between elements of V. A cover is a subset of V containing at least one representative from each subset. The multiple-choice minimum diameter problem is to select a cover of minimum diameter. The diameter is deened as the maximum distance of any pair of elements in the cover. ...

An ecophysiological and developmental perspective on variation in vessel diameter.

Variation in xylem vessel diameter is one of the most important parameters when evaluating plant water relations. This review provides a synthesis of the ecophysiological implications of variation in lumen diameter together with a summary of our current understanding of vessel development and its endogenous regulation. We analyzed inter-specific variation of the mean hydraulic vessel diameter (...

Effect of Root Moisture Content and Diameter on Root Tensile Properties

The stabilization of slopes by vegetation has been a topical issue for many years. Root mechanical characteristics significantly influence soil reinforcement; therefore it is necessary to research into the indicators of root tensile properties. In this study, we explored the influence of root moisture content on tensile resistance and strength with different root diameters and for different tre...

An evo-devo perspective on root genetic variation in cereals

From a strictly developmental perspective, and ignoring environmental effects, a morphological feature (such as an organ) is the result of developmental events that initially occur at the level of one or a few cells. These cells integrate external and endogenous signals, and then the first step on the developmental pathway is a change in gene expression. This is followed by division, growth, di...

The root economics spectrum : divergence of absorptive root strategies with root 1 diameter