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Reaction Wood Anatomical Traits and Hormonal Profiles in Poplar Bent Stem and Root

De Zio, Elena and Montagnoli, Antonio and Karady, Michal and Terzaghi, Mattia and Sferra, Gabriella and Antoniadi, Ioanna and Scippa, Gabriella S. and Ljung, Karin and Chiatante, Donato and Trupiano, Dalila (2020). Reaction Wood Anatomical Traits and Hormonal Profiles in Poplar Bent Stem and Root. Frontiers in Plant Science. 11 , 590985
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Abstract

Reaction wood (RW) formation is an innate physiological response of woody plants to counteract mechanical constraints in nature, reinforce structure and redirect growth toward the vertical direction. Differences and/or similarities between stem and root response to mechanical constraints remain almost unknown especially in relation to phytohormones distribution and RW characteristics. Thus, Populus nigra stem and root subjected to static non-destructive mid-term bending treatment were analyzed. The distribution of tension and compression forces was firstly modeled along the main bent stem and root axis; then, anatomical features, chemical composition, and a complete auxin and cytokinin metabolite profiles of the stretched convex and compressed concave side of three different bent stem and root sectors were analyzed. The results showed that in bent stems RW was produced on the upper stretched convex side whereas in bent roots it was produced on the lower compressed concave side. Anatomical features and chemical analysis showed that bent stem RW was characterized by a low number of vessel, poor lignification, and high carbohydrate, and thus gelatinous layer in fiber cell wall. Conversely, in bent root, RW was characterized by high vessel number and area, without any significant variation in carbohydrate and lignin content. An antagonistic interaction of auxins and different cytokinin forms/conjugates seems to regulate critical aspects of RW formation/development in stem and root to facilitate upward/downward organ bending. The observed differences between the response stem and root to bending highlight how hormonal signaling is highly organ-dependent.

Authors/Creators:De Zio, Elena and Montagnoli, Antonio and Karady, Michal and Terzaghi, Mattia and Sferra, Gabriella and Antoniadi, Ioanna and Scippa, Gabriella S. and Ljung, Karin and Chiatante, Donato and Trupiano, Dalila
Title:Reaction Wood Anatomical Traits and Hormonal Profiles in Poplar Bent Stem and Root
Series Name/Journal:Frontiers in Plant Science
Year of publishing :2020
Volume:11
Article number:590985
Number of Pages:16
Publisher:FRONTIERS MEDIA SA
ISSN:1664-462X
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
Keywords:bending stress, auxins, cytokinins, metabolite profiling, UHPLC-MS, MS
URN:NBN:urn:nbn:se:slu:epsilon-p-110188
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-110188
Additional ID:
Type of IDID
DOI10.3389/fpls.2020.590985
Web of Science (WoS)000600754400001
ID Code:21758
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:26 Jan 2021 14:03
Metadata Last Modified:26 Jan 2021 14:11

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