-Action potential (AP) of excitable plant cells is an important signaling event that can differentially alter physicochemical and physiological processes in various parts of the same cell. In giant cells of characean algae, the AP propagation has minor effect on photosynthetic electron transport in areas with high activity of plasmalemmal H-pump but inhibits linear electron flow in regions featuring high passive H/OH conductance of the plasma membrane (PM). Uneven spatial distributions of local periplasmic and cytoplasmic pH facilitate the operation of distinct (CO-dependent and O-mediated) pathways of photoinduced electron flow, which presumably accounts for differential influence of AP on photosynthesis.
View Article and Find Full Text PDFThis article was updated on December 20, 2023, because of previous errors, which were discovered after the preliminary version of the article was posted online. Figure 4 has been replaced with a figure that presents different p values. Also, on page 1943, the text that had read: "Quantitative microCT confirmed that the total volume of the regenerate in the RD group was much smaller compared with the SF (p = 0.
View Article and Find Full Text PDFThe current concept of taste transduction implicates the TASR/PLCβ2/IPR3/TRPM5 axis in mediating chemo-electrical coupling in taste cells of the type II. While generation of IP has been verified as an obligatory step, DAG appears to be a byproduct of PIP cleavage by PLCβ2. Here, we provide evidence that DAG-signaling could play a significant and not yet recognized role in taste transduction.
View Article and Find Full Text PDF(1) The purpose of this study was to examine the prevalence of the relative age effect (RAE) in the best young (10 to 15 years old) track and field athletes. (2) Hypothesis: The prevalence of the RAE in the best young track and field athletes of both genders will be evident in all age groups from 10 to 15 years old, which may be associated with the significant relationship between biological maturity, chronological age, and the development of physical qualities. (3) Materials and methods: In total, 1778 athletes volunteered for this study.
View Article and Find Full Text PDFType III taste cells are the only taste bud cells which express voltage-gated (VG) Ca channels and employ Ca-dependent exocytosis to release neurotransmitters, particularly serotonin. The taste bud is a tightly packed cell population, wherein extracellular Ca is expected to fluctuate markedly due to the electrical activity of taste cells. It is currently unclear whether the Ca entry-driven synapse in type III cells could be reliable enough at unsteady extracellular Ca.
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