부산대학교 도서관

As a kind of economic forest fruit tree with medicinal, edible, greening, and ornamental functions, Cornus officinalis has been introduced and cultivated in a large area in the People’s Republic of China. However, great differences exist in the content of active secondary metabolites of C. officinalis from different regions. We wonder whether local rhizosphere soil properties and soil microorganisms have a critical impact on the accumulation of active components in the fruit. Eight sampling sites were selected in the main C. officinalis producing area to collect rhizosphere soil and mature fruits. The contents of soil pH, nitrate nitrogen, ammonia nitrogen, phosphate, and active secondary metabolites in C. officinalis fruits were measured, respectively, and the fungal community composition of rhizosphere soil were determined by Illumina sequencing. The content of secondary metabolites was more abundant in C. officinalis fruits A3, A4, A6, and A7 than A1, A2, and A5 (p < 0.05) (A represents fruit sample). Fungal community compositions were similar between production areas S3, S4, and S6, whereas S7 (S represents rhizosphere soil sample) was apparently different from them. Soil pH, nitrate nitrogen, and ammonia nitrogen content were significantly correlated with the content of gallic acid, morroniside, sweroside, and loganin (p < 0.05). The quality of C. officinalis fruits in introduction cultivation areas is not necessarily worse than those in traditional cultivation areas (for example, the content of monoside in A7 is higher than others). The contents of secondary metabolites of C. officinalis fruits seem to have a positive correlation with the abundance of a certain fungus of the Cladosporiaceae family Cladosporium genus in the rhizosphere soil. Such findings had important implications for the cultivation, development, and utilization of C. officinalis.