Titre
Elongation of wood fibers combines features of diffuse and tip growth
Type
article
Institution
Externe
Périodique
Auteur(s)
Majda, Mateusz
Auteure/Auteur
Kozlova, Liudmila
Auteure/Auteur
Banasiak, Alicja
Auteure/Auteur
Derba-Maceluch, Marta
Auteure/Auteur
Iashchishyn, Igor A.
Auteure/Auteur
Morozova-Roche, Ludmilla A.
Auteure/Auteur
Smith, Richard S.
Auteure/Auteur
Gorshkova, Tatyana
Auteure/Auteur
Mellerowicz, Ewa J.
Auteure/Auteur
Liens vers les personnes
Statut éditorial
Publié
Date de publication
2021-10
Peer-reviewed
Oui
Langue
anglais
Résumé
Xylem fibers are highly elongated cells that are key constituents of wood, play major physiological roles in plants, comprise an important terrestrial carbon reservoir, and thus have enormous ecological and economic importance. As they develop, from fusiform initials, their bodies remain the same length while their tips elongate and intrude into intercellular spaces.
To elucidate mechanisms of tip elongation, we studied the cell wall along the length of isolated, elongating aspen xylem fibers and used computer simulations to predict the forces driving the intercellular space formation required for their growth.
We found pectin matrix epitopes (JIM5, LM7) concentrated at the tips where cellulose microfibrils have transverse orientation, and xyloglucan epitopes (CCRC-M89, CCRC-M58) in fiber bodies where microfibrils are disordered. These features are accompanied by changes in cell wall thickness, indicating that while the cell wall elongates strictly at the tips, it is deposited all over fibers. Computer modeling revealed that the intercellular space formation needed for intrusive growth may only require targeted release of cell adhesion, which allows turgor pressure in neighboring fiber cells to ‘round’ the cells creating spaces.
These characteristics show that xylem fibers’ elongation involves a distinct mechanism that combines features of both diffuse and tip growth.
To elucidate mechanisms of tip elongation, we studied the cell wall along the length of isolated, elongating aspen xylem fibers and used computer simulations to predict the forces driving the intercellular space formation required for their growth.
We found pectin matrix epitopes (JIM5, LM7) concentrated at the tips where cellulose microfibrils have transverse orientation, and xyloglucan epitopes (CCRC-M89, CCRC-M58) in fiber bodies where microfibrils are disordered. These features are accompanied by changes in cell wall thickness, indicating that while the cell wall elongates strictly at the tips, it is deposited all over fibers. Computer modeling revealed that the intercellular space formation needed for intrusive growth may only require targeted release of cell adhesion, which allows turgor pressure in neighboring fiber cells to ‘round’ the cells creating spaces.
These characteristics show that xylem fibers’ elongation involves a distinct mechanism that combines features of both diffuse and tip growth.
Sujets
PID Serval
serval:BIB_33616BFF22FF
URL éditeur
Date de création
2023-06-10T20:47:31.318Z
Date de création dans IRIS
2025-05-20T15:34:58Z