Chlamydomonadales are elective subjects for the investigation of the problems related to locomotion and transport in biological fluid dynamics, whose resolution could enhance searching efficiency and assist in the avoidance of dangerous environments. In this paper, we elucidate the swimming behavior of Tetraflagellochloris mauritanica, a unicellular-multicellular alga belonging to the order Chlamydomonadales. This quadriflagellate alga has a complex swimming motion consisting of alternating swimming phases connected by in-place random reorientations and resting phases. It is capable of both forward and backward swimming, both being normal modes of swimming. The complex swimming behavior resembles the run-and-tumble motion of peritrichous bacteria, with in-place reorientation taking the place of tumbles. In the forward swimming, T. mauritanica shows a very efficient flagellar beat, with undulatory retrograde waves that run along the flagella to their tip. In the backward swimming, the flagella show a nonstereotypical synchronization mode, with a pattern that does not fit any of the modes present in the other Chlamydomonadales so far investigated.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/jpy.12384 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Differences in kinematics, kinetics, and muscle activity between underwater dolphin kicking and flutter kicking: multiple approaches using three-dimensional motion analysis, electromyography, and hydrodynamic simulation.
Sports Biomech
January 2025
Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Japan.
It is well-known among swimmers and coaches that the swimming speed of the underwater dolphin kick (UDK) is higher than that of the underwater flutter kick (UFK). This study aimed to clarify the differences in swimming performance between the two kicking styles in terms of kinematics, kinetics and muscle activity. Eight male swimmers performed UDK and UFK in a water flume at same effort levels.
View Article and Find Full Text PDFThe IclR-family transcriptional regulator XyrR controls flotation, motility, antibiotic production and virulence in sp. ATCC 39006.
Front Microbiol
January 2025
Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.
The opportunistic pathogen sp. ATCC 39006 (S39006) is a rod-shaped, motile, Gram-negative bacterium that produces a 𝛽-lactam antibiotic (a carbapenem) and a bioactive red-pigmented tripyrrole antibiotic, prodigiosin. It is also the only known enterobacterium that naturally produces intracellular gas vesicles (GVs), enabling cells to float in static water columns.
View Article and Find Full Text PDFTotal Joint Arthroplasty Patients from Distressed Communities Return to Sports and Physical Activities at Lower Rates.
J Arthroplasty
January 2025
Department of Orthopedic Surgery, Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA.
Background: Patients often desire to participate in sports following total hip arthroplasty (THA) and total knee arthroplasty (TKA), but may be limited functionally and also socioeconomically. The purpose of this study is to investigate the sports participation rates in total joint arthroplasty (TJA) patients based on their Distressed Communities Index (DCI).
Methods: Patients who underwent TJA at our institution from 2015 to 2020 were surveyed on sports/physical activity participation before and after TJA.
Hypercapnic warm-up and re-warm-up-A novel experimental approach in swimming sprint.
PLoS One
January 2025
Department of Physiology and Biochemistry, Faculty of Physical Education and Sport Science, Wroclaw University of Health and Sport Sciences, Wroclaw, Poland.
The purpose of this study was to determine the effective warm-up protocol using an added respiratory dead space (ARDS) 1200 ml volume mask to determine hypercapnic conditions, on the swimming velocity of the 50 m time trial front crawl. Eight male members of the university swimming team, aged 19-25, performed three different warm-up protocols: 1) standardized warm-up in water (WUCON); 2) hypercapnic warm-up in water (WUARDS); 3) hypercapnic a 20-minute transition phase on land, between warm-up in water and swimming test (RE-WUARDS). The three warm-up protocols were implemented in random order every 7th day.
View Article and Find Full Text PDFRobust undulatory locomotion through neuromechanical adjustments in a dissipative medium.
J R Soc Interface
January 2025
Nantes Université, École Centrale Nantes, IMT Atlantique, CNRS, LS2N, UMR 6004, Nantes F-44000, France.
Dissipative environments are ubiquitous in nature, from microscopic swimmers in low-Reynolds-number fluids to macroscopic animals in frictional media. In this study, we consider a mathematical model of a slender elastic locomotor with an internal rhythmic neural pattern generator to examine various undulatory locomotion such as swimming and crawling behaviours. By using local mechanical load as mechanosensory feedback, we have found that undulatory locomotion robustly emerges in different rheological media.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!