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Related Concept Videos

Hypoxia01:23

Hypoxia

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Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
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A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
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Updated: May 3, 2026

Use of Time Lapse Microscopy to Visualize Anoxia-induced Suspended Animation in C. elegans Embryos
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Time-Series Elemental Imaging Reveals CAX-Dependent Redistribution Patterns for Anoxia Recovery.

Shayan Sarkar1,2, Matthew Barr3, Ryan Tappero4

  • 1Pediatrics-Nutrition, Children's Nutrition Research, Baylor College of Medicine, Houston, TX, 77030, USA.

Journal of Experimental Botany
|September 6, 2025
PubMed
Summary

Plant recovery from flooding-induced anoxia is improved by Cation/H⁺ Exchangers (CAXs). Elemental imaging reveals CAX function in nutrient distribution, aiding plant resilience to oxygen deprivation and metal stress.

Keywords:
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Area of Science:

  • Plant Biology
  • Environmental Stress Physiology
  • Biogeochemistry

Background:

  • Flooding causes anoxia, a major stressor for plants, requiring adaptive mechanisms for survival and recovery.
  • Cation/H⁺ Exchangers (CAXs) are crucial for ion homeostasis and metal tolerance in plants.
  • Understanding elemental dynamics during stress recovery is vital for plant resilience.

Purpose of the Study:

  • To investigate elemental redistribution in Arabidopsis thaliana during anoxia recovery.
  • To elucidate the role of Cation/H⁺ Exchangers (CAXs) in plant response to anoxia and metal stress.
  • To evaluate time-series elemental imaging as a tool for assessing plant stress responses.

Main Methods:

  • Utilized time-series X-ray Fluorescence Microscopy (XFM) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) for elemental imaging.
  • Compared wild-type (Col-0) with CAX mutants (cax1 and qKO) under normoxic and anoxic conditions.
  • Assessed plant physiological responses including lipid peroxidation and expression of flood-tolerance proteins.

Main Results:

  • CAX mutants exhibited reduced lipid peroxidation and enhanced expression of flood-tolerance proteins during anoxia recovery.
  • Post-anoxia elemental distribution in wild-type plants mimicked that of CAX mutants under normoxia.
  • CAX mutants showed altered tolerance to excess manganese and copper, but leaf metal distribution during anoxia remained unchanged.

Conclusions:

  • CAX-mediated elemental distribution prior to anoxia, rather than post-anoxia remobilization, appears to facilitate faster recovery.
  • Time-series elemental imaging is a powerful technique for visualizing plant stress response phenotypes.
  • Elemental distribution plays a significant role in plant resilience to anoxia and other environmental stresses.