Unveiling the mechanisms of Moso bamboo's motor function and internal growth stress.

Autor: Luan Y; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Yang Y; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Jiang M; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Liu H; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Ma X; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Zhang X; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Sun F; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China., Fang C; Institute of New Bamboo and Rattan Based Biomaterials, International Centre for Bamboo and Rattan (ICBR), Beijing, 100102, China.; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing, 100102, China.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Sep; Vol. 243 (6), pp. 2201-2213. Date of Electronic Publication: 2024 Jun 17.
DOI: 10.1111/nph.19913
Abstrakt: Bamboo, a renewable resource with rapid growth and an impressive height-to-diameter ratio, faces mechanical instability due to its slender structure. Despite this, bamboo maintains its posture without breaking in its battle against environmental and gravitational forces. But what drives this motor function in bamboo? This study subjected Moso bamboo (Phyllostachys edulis) to gravitational stimulation, compelling it to grow at a 45° angle instead of upright. Remarkably, the artificially inclined bamboo exhibited astonishing shape control and adjustment capabilities. The growth strain was detected at both macroscopic and microscopic levels, providing evidence for the presence of internal stress, namely growth stress. The high longitudinal tensile stress on the upper side, along with a significant asymmetry in stress distribution in tilted bamboo, plays a pivotal role in maintaining its mechanical stability. Drawing upon experimental findings, it can be deduced that the growth stress primarily originates from the broad layers of fiber cells. Bamboo could potentially regulate the magnitude of growth stress by modifying the number of fiber cell layers during its maturation process. Additionally, the microfibril angle and lignin disposition may decisively influence the generation of growth stress.
(© 2024 The Author(s). New Phytologist © 2024 New Phytologist Foundation.)
Databáze: MEDLINE
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