Variations in Kiwifruit Microbiota across Cultivars and Tissues during Developmental Stages

The plant microbiota plays a crucial role in promot-ing plant health by facilitating the nutrient acquisition, abiotic stress tolerance, biotic stress resilience, and host immune regulation. Despite decades of research efforts, the precise relationship and function between plants and microorganisms remain unclear. Kiwifruit (Actinidia spp.) is a widely cultivated horticultural crop known for its high vitamin C, potassium, and phytochemical content. In this study, we investigated the microbial communities of kiwifruit across different cultivars (cvs. Deliwoong and Sweetgold) and tissues at various developmental stages. Our results showed that the microbiota community similarity was confirmed be-tween the cultivars using principal coordinates analysis. Network analysis using both degree and eigenvector centrality indicated similar network forms between the cultivars. Furthermore, Streptomycetaceae was identi-fied in the endosphere of cv. Deliwoong by analyzing amplicon sequence variants corresponding to tissues with an eigenvector centrality value of 0.6 or higher. Our findings provide a foundation for maintaining ki- wifruit health through the analysis of its microbial com-munity.

Automated summary

The plant microbiota is crucial for promoting plant health by facilitating various functions. This study investigated the microbial communities of kiwifruit across different cultivars and tissues at various developmental stages, and identified a key bacterium in one of the cultivars. These findings provide insights for maintaining kiwifruit health through analyzing its microbial community.