| The structure and diversity of rhizosphere microbial communities play an important role in lavender (Lavandula officinalis) growth. The aim is to explore the characteristics and impacts of bacterial community structure and diversity in lavender rhizosphere soil with different planting years. In this study, soil samples were collected from Xinjiang Yili with lavender planted for 1 year, 3 years, 5 years, and unplanted soil. The V4 sequences were subjected to Illumina high-throughput sequencing. The results showed that alpha diversity analysis showed a gradual decrease in Shannon index and Chao index with increasing planting years, indicating a decrease in species richness and bacterial community diversity. A total of 51 phyla, 146 classes, 357 orders, 533 families, and 1 024 genera were detected in the lavender-planted soil samples. At the phylum level, the relative abundance of ≥5% was six dominant phyla such as Proteobacteria, Actinobacteria, etc. At the genus level, the dominant phyla were Kaistobacter, Arthrobacter, etc. With the growth of planting years, the number of Kaistobacter and Sphingomonas gradually increased, and Arthrobacter showed a trend of decreasing and then increasing. The number of Kaistobacter and Sphingomonas increased gradually with the increase of planting years, the number of Bacillus increased and then decreased, and the number of Arthrobacter. showed a trend of decreasing and then increasing. Adopting LEfSe analysis revealed that Salinimicrobium was the main characteristic genus in the control group compared to the planted treatment groups. Glycomyces and Virgisporangium were the main characteristic genera in the 1-year planting group, while Bradyrhizobium and Hyphomicrobium were the main characteristic genera in the 3-year planting group. Bosea and Azohydromonas and four others were the main characteristic genera in the 5-year planting group. The bacterial community structure and diversity in lavender rhizosphere soil showed a decreasing trend with increasing planting years. |
