Detection of acoustic events in Lavender for measuring the xylem vulnerability to embolism and cellular damages / Lia Lamacque    

Public ISBD Faire une suggestion d'achat Titre : Detection of acoustic events in Lavender for measuring the xylem vulnerability to embolism and cellular damages Type de document : document électronique Auteurs : Lia Lamacque, Auteur ; Florian Sabin, Auteur ; Thierry Améglio, Auteur ; Stéphane Herbette, Auteur ; Guillaume Charrier, Auteur Editeur : Oxford Academic Année de publication : 2022 Note générale : Volume 73, Issue 11, Pages 3699–3710 Langues : Anglais (eng) Catégories : 575 Anatomie et physiologie végétales :575.2 Transformations génétiques des plantes Tags : 'Acoustics  cavitation  cellular damages  dendrometer  hydraulic failure,  lavender  plant mortality  xylem  '. Index. décimale : 575 Résumé : Acoustic emission analysis is promising to investigate the physiological events leading to drought-induced injury and mortality. However, their nature and source are not fully understood, making this technique difficult to use as a direct measure of the loss of xylem hydraulic conductance. Acoustic emissions were recorded during severe dehydration in lavender plants (Lavandula angustifolia) and compared with the dynamics of embolism development and cell damage. The timing and characteristics of acoustic signals from two independent recording systems were compared by principal component analysis (PCA). Changes in water potential, branch diameter, loss of hydraulic conductance, and cellular damage were also measured to quantify drought-induced damages. Two distinct phases of acoustic emissions were observed during dehydration: the first one associated with a rapid loss of diameter and a significant increase in loss of xylem conductance (90%), and the second with slower changes in diameter and a significant increase in cellular damage. Based on PCA, a developed algorithm discriminated hydraulic-related acoustic signals from other sources, proposing a reconstruction of hydraulic vulnerability curves. Cellular damage preceded by hydraulic failure seems to lead to a lack of recovery. The second acoustic phase would allow detection of plant mortality. En ligne : https://arxiv.org/abs/2105.03866 Format de la ressource électronique : PDF Detection of acoustic events in Lavender for measuring the xylem vulnerability to embolism and cellular damages [document électronique] / Lia Lamacque, Auteur ; Florian Sabin, Auteur ; Thierry Améglio, Auteur ; Stéphane Herbette, Auteur ; Guillaume Charrier, Auteur . - Oxford Academic, 2022. Volume 73, Issue 11, Pages 3699–3710 Langues : Anglais (eng) Catégories : 575 Anatomie et physiologie végétales :575.2 Transformations génétiques des plantes Tags : 'Acoustics  cavitation  cellular damages  dendrometer  hydraulic failure,  lavender  plant mortality  xylem  '. Index. décimale : 575 Résumé : Acoustic emission analysis is promising to investigate the physiological events leading to drought-induced injury and mortality. However, their nature and source are not fully understood, making this technique difficult to use as a direct measure of the loss of xylem hydraulic conductance. Acoustic emissions were recorded during severe dehydration in lavender plants (Lavandula angustifolia) and compared with the dynamics of embolism development and cell damage. The timing and characteristics of acoustic signals from two independent recording systems were compared by principal component analysis (PCA). Changes in water potential, branch diameter, loss of hydraulic conductance, and cellular damage were also measured to quantify drought-induced damages. Two distinct phases of acoustic emissions were observed during dehydration: the first one associated with a rapid loss of diameter and a significant increase in loss of xylem conductance (90%), and the second with slower changes in diameter and a significant increase in cellular damage. Based on PCA, a developed algorithm discriminated hydraulic-related acoustic signals from other sources, proposing a reconstruction of hydraulic vulnerability curves. Cellular damage preceded by hydraulic failure seems to lead to a lack of recovery. The second acoustic phase would allow detection of plant mortality. En ligne : https://arxiv.org/abs/2105.03866 Format de la ressource électronique : PDF

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