Chemical Composition and Nutritional Value of Royal Jelly Samples Obtained from Honey Bee (Apis mellifera) Hives Fed on Oak and Rapeseed Pollen Patties. 2024

Sampat Ghosh, and Chuleui Jung
Agriculture Science and Technology Research Institute, Andong National University, Andong 36729, Gyeonbuk, Republic of Korea.

Young workers, i.e., nurse honey bees, synthesize and secrete royal jelly to feed the brood and queen. Since royal jelly is a protein-rich substance, the quality of royal jelly may be influenced by the consumption of feed with varying protein content. We tested whether honey bee (Apis mellifera) colonies compensates for the nutritional quality to produce royal jelly by feeding different pollen patties made of oak or rapeseed pollen. After harvesting royal jelly, we examined the chemical composition including proximate nutrients, amino acids, proteins, fatty acids, and minerals of royal jelly samples obtained from two treatments. The results revealed that pollen patties with different nutritional levels did not influence the nutritional composition except for the crude fat. The levels of 10-HDA, which serves as an indicator of the royal jelly quality, showed no significant difference between the oak and rapeseed treatments, with values of 1.9 and 2.1 g/100 g, respectively. However, we found some differences in the protein intensity, particularly the MRJP3 precursor, MRJP3-like, and glucose oxidase. This study suggests that honey bees may have mechanisms to compensate for nutritional standards to meet the brood's and queen's nutritional requirements during bee pollen collection, preserving bee bread and royal jelly secretion.

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