NGHIÊN CỨU PHÂN BIỆT VỀ THỰC VẬT HỌC VÀ DI TRUYỀN HỌC CỦA 3 LOÀI MẮM (AVICENNIA SP.) THU HÁI TẠI TỈNH CÀ MAU

Abstract

Objective: Distinguish the botanical and genetic characteristics of 3 species of Avicennia sp. collected in Ca Mau province, Vietnam. Subjects and methods: Samples of Avicennia sp. plants collected in Ca Mau province in June 2023. Samples of roots, stems, leaves, flowers and fruits were studied for morphological characteristics. Fresh leaf samples were washed, microscopically analyzed and DNA extracted for genetic diversity research and gene sequencing. Results: The similarity level of samples collected in Ca Mau when compared with NCBI data is similar to 3 species of Avicennia sp.: Avicennia officinalis is 99.3% similar; Avicennia marina is 99.5% similar; Avicennia alba is 99.5% similar. The results of gene sequencing serve as a basis to distinguish the botanical characteristics of 3 different species of Avicennia collected in Ca Mau. From the morphological characteristics, it can be seen that leaves are used parts with many differences in shape, so they were selected for microsurgical analysis. The distinguishing feature of the three Avicennia species was the arrangement of phloem and wood. Conclusion: Genetic results serve as a basis for distinguishing and comparing morphological and microsurgical characteristics of parts of the 3 species of Avicennia which people have more information to conserve and harvest these plants.