Fig. 1

Amino acid content of strawberry flower petal tissues. Microbial community collapse in the strawberry anthosphere (Kim et al. 2019). A Microbiome diversity of strawberry flowers (n = 9, 13 independent experiments). Strawberry (cv. Maehyang) flowers were collected from week 0 (Nov. 2013) to week 24 (Apr. 2014). Top 10 phyla at the family level based on the Silva database (http://www.arb-silva.de/) and black line presented the SP6C4 OTUs number by 98% similarity. B, C ASVs alpha diversity over time according to Shannon’s diversity and equitability indices relative to gray mold disease incidence. D Content of 23 amino acids in strawberry flower petals (n = 3, 8 independent experiments). Normalized concentrations of amino acids were compared by independent t test (P value < 0.05). Black and red bars indicate periods of low and high disease incidence, respectively. E Growth of S. globisporus SP6C4 in basal medium supplemented with amino acids. A bacterial suspension (100 μl, OD_600nm 0.02) was inoculated into basal medium supplemented with amino acids (2%) in a 96-well plate and incubated on an orbital shaker at 150 rpm and 28 °C for 120 h (n = 3, 3 independent experiments). F Bacterial growth with 2% amino acid amendments. Box-and-whisker plot presenting boundaries of the rectangles indicate the 25th and 75th percent and the horizontal bars indicated the median. A Kruskal-Wallis rank-sum test and stars indicate Tukey’s HSD test, statistically significant differences among treatments (*P < 0.05, **P < 0.01, ***P < 0.001)