Free swimming cells of the ciliated protozoan Tetrahymena are attracted to certain chemicals by chemokinesis. However, a special type of chemotaxis in response to a chemical gradient is found in cells gliding very slowly in semisolid media. In contrast to classical chemotaxis by leukocytes, which is solely positive towards chemo-attractants, the oriented chemokinesis by gliding Tetrahymena involves both positive and negative elements. The major chemo-attractants are peptides and/or proteins, and they may be compounds which signal the presence of food in the natural environment of this freshwater phagotroph.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/bies.950140113 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A chromosome-level genome assembly of the cabbage aphid Brevicoryne brassicae.
Sci Data
January 2025
Hubei Hongshan Laboratory, Wuhan, 430070, China.
The cabbage aphid, Brevicoryne brassicae, is a major pest on Brassicaceae plants, causing significant yield losses annually. However, the lack of genomic resources has hindered progress in understanding this pest at the molecular level. Here, we present a high-quality, chromosomal-level genome assembly for B.
View Article and Find Full Text PDFHarnessing Insect Chemosensory and Mechanosensory Receptors Involved in Feeding for Precision Pest Management.
Life (Basel)
January 2025
Monell Chemical Senses Center, Philadelphia, PA 19104, USA.
Chemosensation and mechanosensation are vital to insects' survival and behavior, shaping critical physiological processes such as feeding, metabolism, mating, and reproduction. During feeding, insects rely on diverse chemosensory and mechanosensory receptors to distinguish between nutritious and harmful substances, enabling them to select suitable food sources while avoiding toxins. These receptors are distributed across various body parts, allowing insects to detect environmental cues about food quality and adjust their behaviors accordingly.
View Article and Find Full Text PDFSocially contagious urination in chimpanzees.
Curr Biol
January 2025
Wildlife Research Center, Kyoto University, Kyoto 6068203, Japan; Institute for Advanced Study, Kyoto University, Kyoto 6068501, Japan; Institute for the Future of Human Society, Kyoto 6068304, Japan.
The decision to urinate involves a complex combination of both physiological and social considerations. However, the social dimensions of urination remain largely unexplored. More specifically, aligning urination in time (i.
View Article and Find Full Text PDFCortical coding of gustatory and thermal signals in active licking mice.
J Physiol
January 2025
Department of Biological Science, Programs in Neuroscience, Molecular Biophysics and Cell and Molecular Biology, Florida State University, Tallahassee, Florida, USA.
Eating behaviours are influenced by the integration of gustatory, olfactory and somatosensory signals, which all contribute to the perception of flavour. Although extensive research has explored the neural correlates of taste in the gustatory cortex (GC), less is known about its role in encoding thermal information. This study investigates the encoding of oral thermal and chemosensory signals by GC neurons compared to the oral somatosensory cortex.
View Article and Find Full Text PDFCharacterization of chemosensory genes in the subterranean pest Gryllotalpa Orientalis based on genome assembly and transcriptome comparison.
BMC Genomics
January 2025
College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China.
Background: Chemosensory perception plays a vital role in insect survival and adaptability, driving essential behaviours such as navigation, mate identification, and food location. This sensory process is governed by diverse gene families, including odorant-binding proteins (OBPs), olfactory receptors (ORs), ionotropic receptors (IRs), chemosensory proteins (CSPs), gustatory receptors (GRs), and sensory neuron membrane proteins (SNMPs). The oriental mole cricket (Gryllotalpa orientalis Burmeister), an invasive pest with an underground, phyllophagous lifestyle, causes substantial crop damage.
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!