The single-grain method: adding TEM to the equation

Area of Science:

• Paleontology
• Microscopy
• Palynology

Background:

• Transmission electron microscopy (TEM) is crucial for studying pollen and spore ultrastructure.
• Existing methods for preparing single pollen grains for TEM can be time-consuming and result in sample loss.

Purpose of the Study:

• To develop an advanced, efficient protocol for preparing individual extant and fossil pollen grains for TEM analysis.
• To improve upon existing single-grain preparation techniques for palynological research.

Main Methods:

• A novel protocol for the meticulous preparation of single pollen grains.
• Integration with existing light and scanning electron microscopy techniques for fossil pollen investigation.

Main Results:

• The protocol facilitates rapid recovery of ultrastructural data from single pollen and spores.
• It effectively prevents the loss of pollen grains and ensures successful preparation of even difficult-to-locate specimens.
• The method is user-friendly and significantly reduces preparation time compared to prior techniques.

Conclusions:

• This advanced protocol offers a significant improvement for TEM-based palynological studies.
• It enhances the efficiency and success rate of analyzing pollen and spore ultrastructure, complementing established methods.