Analysis of Flowering and Nectar Characteristics of Major Four Chestnut Cultivars (Castanea spp.)

Comparison of Biochemical Constituents and Contents in Floral Nectar of Castanea spp.

“…Free sugar content was highest in CMC, but sugar content per catkin considering the amount of nectar volume was highest in CCJ. As a result of analyzing the free sugar content of four chestnut varieties [ 27 ], the free sugar content (16.4 to 69.3 μg) and the sugar content per catkin (0.48 to 1.40 mg/catkin) displayed significant differences, which showed the same results as our study. However, a previous study comparing nectar characteristics between Korean and Chinese Hawthorn reported that the nectar volume and the free sugar content significantly differ, but the nectar sugar contents per flower of Korean hawthorn (69.2 μg) and Chinese hawthorn varieties (50.6~79.0 μg) did not significantly differ [ 26 ].…”

“…Because the dietary sugar consumed by bees affects the amount of honey available to humans through digestive physiology, sugar analysis is required for study of honey plants [ 26 , 27 ]. In this study, the sugar content (22.6~82.5 μg) and sugar content per catkin (0.43~1.35 mg/catkin) of floral nectar showed a significant difference ( Table 1 , p = 0.000).…”

“…Five amino acids such as asparagine, GABA, glutamine, phenylalanine, and proline showed differences between species ( Table 3 ). Kim et al [ 27 ] investigated the amino acids of floral nectar from four chestnut varieties ( C. crenata ) and reported that there were differences in 9 amino acids depending on the varieties. The reason for the difference in amino acid comparison is that the previous study performed statistical analysis using ANOVA test, whereas this study used the Kruskal-Wallis H-test.…”