Effect of mechanical stress on growth and anatomical structure of red pine: compression stress

Abstract

Under natural conditions, the tree is stressed statically by the mass of the crown and bole. Pairs of steel rods drilled through two branch whorls were connected by turnbuckles to simulate increasing static load on a given internode. Level of soil moisture was included to discern its influence on the effect of static loading.Compression and moisture stress each reduced radial growth. After computed loading exceeded the proportional limit, the next-formed fibers were greatly expanded radially and, when macerated, exhibited extreme twisting. The fibers produced before the proportional limit was exceeded exhibited compression failures when macerated.

Mechanical Stress and Cell Wall Orientation in Plants. Ii. The Application of Controlled Directional Stress to Growing Plants; With a Discussion on the Nature of the Wound Reaction

“…Others suffer from uncertainties as to the true directionality of applied stress (Sussex and Clutter, 1968). Other approaches, applying mechanical stress at a much larger scale (Quirk and Freese, 1976), are directed at the understanding of general growth responses, where the applied stresses are supported by woody tissues for the most part. (See also the review by Wilson and Archer, 1977.…”

Mejora genética: lo que el viento nos traerá

“…El viento somete a los árboles a esfuerzos mecánicos, principalmente un balanceo que induce esfuerzos de tensión y compresión alternados, combinados con efectos de torsión sobre el tronco, ramas y raíces (QUIRK et al, 1975, QUIRK & FREESE, 1976aNIKLAS, 1999;DE LANGRE, 2006;TELEWSKI, 2006;CODER, 2010). El crecimiento de las plantas es extremadamente sensible al régimen de cargas crónico a que le somete el viento (MOULIA et al, 2011).…”

Acclimation to wind loads and/or contact stimuli? A biomechanical study of peltate leaves of Pilea peperomioides

“…From a mechanical point of view, wind causes not only bending but also twisting and rubbing of the leaves against each other. Especially torque stress through twisting can cause even stronger thigmomorphogenetic acclimations compared with other mechanical stimulations ( Quirk et al ,1975 ; Quirk and Freese, 1976 ). To understand individual aspects, such as the mechanical influence of wind, touch or a combination of both stimuli on the petiole and the transition zone of foliage leaves, a controlled factorial experimental design is necessary.…”