title: Real-time imaging of pulvinus bending in Mimosa pudica.
abstract: Mimosa pudica is a plant that rapidly shrinks its body in response to external stimuli. M. pudica does not perform merely simple movements, but exhibits a variety of movements that quickly change depending on the type of stimuli. Previous studies have investigated the motile mechanism of the plants from a biochemical perspective. However, an interdisciplinary study on the structural characteristics of M. pudica should be accompanied by biophysical research to explain the principles underlying such movements. In this study, the structural characteristics and seismonastic reactions of M. pudica were experimentally investigated using advanced bio-imaging techniques. The results show that the key factors for the flexible movements by the pulvinus are the following: bendable xylem bundle, expandable/shrinkable epidermis, tiny wrinkles for surface modification, and a xylem vessel network for efficient water transport. This study provides new insight for better understanding the M. pudica motile mechanism through structural modification.
authors.affiliation: School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea.
authors.forename: Kahye
authors.initials: K
authors.lastname: Song
authors.affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology(POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea.
authors.forename: Eunseop
authors.initials: E
authors.lastname: Yeom
authors.affiliation: 1] School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea [2] Department of Mechanical Engineering, Pohang University of Science and Technology(POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 790-784, Korea.
authors.forename: Sang Joon
authors.initials: SJ
authors.lastname: Lee
mesh_terms: D004817:Epidermis / Q000254:growth & development / Q000648:ultrastructure; D031298:Mimosa / Q000033:anatomy & histology / Q000254:growth & development / Q000648:ultrastructure*; D057054:Molecular Imaging; D009068:Movement / Q000502:physiology; D018516:Pulvinus / Q000254:growth & development / Q000648:ultrastructure*; D052584:Xylem / Q000502:physiology