Related Experiment Video
Updated: Aug 8, 2026

Evaluation of Photosynthetic Efficiency in Photorespiratory Mutants by Chlorophyll Fluorescence Analysis
Published on: December 9, 2022
Photosynthesis, Photorespiration and Respiration of Chloroplasts From Acetabularia mediterrania
R G Bidwell1, W B Levin, D C Shephard
1Departments of Biology and Anatomy, Case Western Reserve University, Cleveland, Ohio 44106.
Abstract:
A chloroplast fraction isolated from Acetabularia mediterrania carries on photosynthesis at rates essentially equal to those of whole cells. Electron and phase contrast microscopy reveals that the chloroplasts are intact and well preserved. Preparations contain no identifiable peroxisomes, but some cytoplasmic and mitochondrial contamination is present. Photosynthesis and CO(2) production in light by chloroplast preparations are in many respects similar to that of bean leaves, although the measured rates are somewhat lower. Respiration and photosynthesis of chloroplast preparations and whole cells of Acetabularia is essentially similar except that cells have a strong dark-type respiration which continues in light and is CO(2) dependent, the substrate being mainly recent photosynthate. The data suggest that chloroplasts are the site of photorespiration.
More Related Videos
06:04Assessing Structural Traits in Triticum aestivum and Zea mays for C3 and C4 Photosynthetic Differentiation Using Free-hand and Semi-thin Sections
Published on: July 12, 2024
10:20Evaluation of Photosynthetic Behaviors by Simultaneous Measurements of Leaf Reflectance and Chlorophyll Fluorescence Analyses
Published on: August 9, 2019
Related Concept Videos
The Calvin Benson Cycle
What is Photosynthesis?
What is Photosynthesis?
Types of Organisms Based on their Modes of Nutrition
Broadly, there are two main categories of organisms based on their modes of nutrition — autotrophs and heterotrophs. An...
Anatomy of Chloroplasts
The Calvin Cycle
C4 Pathway and CAM
C4 Pathway
The C4 pathway is used by plants such as...