ASSESSMENT OF AGRO - BIOLOGICAL CHARACTERISTICS AND ROSMARINIC ACID CONTENT IN THE FLOWER CLUSTER OF SOME Prunella vulgaris L. ACCESSIONS

Abstract

A total of 10 Prunella vulgaris accessions collected from different ecological regions were evaluated for morphology, growth and development yield, and rosmarinic acid content in flower clusters. The study was conducted at the Tam Dao Medicinal Plant Research Station, Vinh Phuc province, from September 2023 to October 2024. The experiment was arranged in a sequential, non - replicated design. The results showed that the accessions had plant heights ranging from 32.90 to 42.10 cm, flower cluster numbers per plant ranging from 23.40 to 45.60 clusters, flower cluster lengths ranging from 14.55 to 30.35 mm, and the individual yield of Prunella vulgaris L. samples varied from 3.16 to 7.12 g. The actual yields of P. vulgaris accessions ranged from 0.123 tons/ha to 0.277 tons/ha. Among them, accession HKT2 had the highest actual yield and rosmarinic acid yield in flower clusters, reaching 0.277 tons/ha and 0.59 kg/ha, respectively, meeting the standards of the 2015 Chinese Pharmacopoeia. Thus, HKT2 could be ideal for commercial production after further evaluation and trials.