Related Experiment Video
Updated: May 6, 2026
10:35
Plastoglobule Lipid Droplet Isolation from Plant Leaf Tissue and Cyanobacteria
Published on: October 6, 2022
3.4K
Purification of plastids from higher-plant roots
Planta
|November 16, 2013
Summary
This study details a new method for purifying plastids from pea plant roots. The isolated plastids are highly intact and pure, suitable for studying metabolite transport.
Area of Science:
- Plant biology
- Cell biology
- Biochemistry
Background:
- Plastids are vital organelles in plant cells, responsible for photosynthesis and other metabolic processes.
- Efficient isolation of intact plastids is crucial for studying their function and biochemical pathways.
- Previous methods may yield plastids with significant contamination or damage.
Purpose of the Study:
- To develop and describe a reliable procedure for purifying plastids from Pisum sativum L. (pea) roots.
- To assess the purity and integrity of the isolated plastids.
- To evaluate the suitability of these preparations for metabolite transport studies.
Main Methods:
- Isolation of plastids from Pisum sativum L. roots.
- Assessment of organelle purity using organelle-specific marker enzymes.
- Evaluation of plastid integrity via electron microscopy and enzyme latency assays.
- Enzyme activity assays (glutamate synthase, glucose-6-phosphogluconate dehydrogenase) before and after tryptic digestion.
Main Results:
- The purification procedure yielded plastid preparations substantially free from contaminating particles.
- Electron microscopy confirmed the purity of the isolated plastids.
- Enzyme latency indicated 90-95% intact plastids.
- Enzyme resistance to tryptic digestion suggested 70-85% intactness in unlysed organelles.
Conclusions:
- A robust method for isolating highly pure and intact plastids from pea roots has been established.
- The isolated plastids meet criteria for suitability in metabolite transport research.
- This procedure advances the ability to study plastidial functions in Pisum sativum L.
Related Concept Videos
02:12Short-distance Transport of Resources
14.9K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
14.9K
02:34Water and Mineral Acquisition
24.4K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
24.4K