Microscopic characterization of five Artemisia crude herbs using light microscopy, scanning electron microscopy, and...

Area of Science:

• Botany
• Pharmacognosy
• Microscopy

Background:

• Five Artemisia species (A. annua, A. argyi, A. absinthium, A. leucophylla, A. lavandulaefolia) are frequently misidentified or adulterated in herbal commerce.
• Accurate authentication is crucial for ensuring the quality and efficacy of herbal products derived from these species.

Purpose of the Study:

• To develop and provide a comprehensive microscopic identification method for distinguishing between five specific Artemisia species.
• To establish reliable diagnostic features for the authentication of crude Artemisia herbs.

Main Methods:

• Utilized light microscopy, scanning electron microscopy, and quantitative microscopic analysis.
• Examined transverse sections, morphological features, and powder characteristics.
• Quantified glandular trichome density and area.

Main Results:

• Identified key microscopic features including vascular bundle fiber distribution, xylem shape, trichome types (glandular and non-glandular), calcium oxalate crystal morphology, and glandular trichome characteristics (number, size).
• Demonstrated significant differences in trichome morphology and density among the five species.
• Developed a detailed microscopic identification diagram.

Conclusions:

• Microscopic characteristics, particularly trichome features, provide reliable criteria for authenticating the five studied Artemisia species.
• The findings offer valuable microscopic evidence and a diagnostic tool for quality control in the herbal industry.