"Mechanical stress is a widespread condition caused by numerous. environmental factors that severely affect plant stability. In response to. mechanical stress, plants have evolved complex response pathways able to. detect mechanical perturbations and inducing a suite of modifications in order. to improve anchorage. The response of woody roots to mechanical stresses. has been studied mainly at the morphological and biomechanical level,. whereas investigations on the factors triggering these important alterations. are still at the initial stage. Populus has been widely used to study the response. of stem to different mechanical stresses and, since it has the first forest tree. genome to be decoded, represents a model woody plant for addressing. questions on the mechanisms controlling adaptation of woody roots to. changing environments. In this study, a morphological and physiological. analysis was used to investigate factors controlling modifications in Populus. nigra woody taproots subjected to mechanical stress. An experimental model. analyzing spatial and temporal mechanical force distribution along the woody. taproot axis enabled us to compare the events occurring in its above-, centraland. below-bending sectors. Different morphogenetic responses and local. variations of lignin and plant hormones content have been observed, and. a relation with the distribution of the mechanical forces along the stressed. woody taproots is hypothesized. We investigated the differences of the. response to mechanical stress induction during the time; in this regard, we. present data referring to the effect of mechanical stress on plant transition. from its condition of winter dormancy to that of full vegetative activity."

Involvement of lignin and hormones in the response of woody poplar taproots to mechanical stress

TRUPIANO, Dalila;LASSERRE, Bruno;SCIPPA, Gabriella
2012-01-01

Abstract

"Mechanical stress is a widespread condition caused by numerous. environmental factors that severely affect plant stability. In response to. mechanical stress, plants have evolved complex response pathways able to. detect mechanical perturbations and inducing a suite of modifications in order. to improve anchorage. The response of woody roots to mechanical stresses. has been studied mainly at the morphological and biomechanical level,. whereas investigations on the factors triggering these important alterations. are still at the initial stage. Populus has been widely used to study the response. of stem to different mechanical stresses and, since it has the first forest tree. genome to be decoded, represents a model woody plant for addressing. questions on the mechanisms controlling adaptation of woody roots to. changing environments. In this study, a morphological and physiological. analysis was used to investigate factors controlling modifications in Populus. nigra woody taproots subjected to mechanical stress. An experimental model. analyzing spatial and temporal mechanical force distribution along the woody. taproot axis enabled us to compare the events occurring in its above-, centraland. below-bending sectors. Different morphogenetic responses and local. variations of lignin and plant hormones content have been observed, and. a relation with the distribution of the mechanical forces along the stressed. woody taproots is hypothesized. We investigated the differences of the. response to mechanical stress induction during the time; in this regard, we. present data referring to the effect of mechanical stress on plant transition. from its condition of winter dormancy to that of full vegetative activity."
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11695/45692
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