Effect of Ascorbic Acid and Proline Amino Acid Supplementations on Cryosurvival and Fertility Rates of Cryopreserved Honey Bee (Apis mellifera) Semen
- 1 December 2022
- journal article
- research article
- Published by Mary Ann Liebert Inc in Biopreservation and Biobanking
- Vol. 20 (6), 551-556
- https://doi.org/10.1089/bio.2021.0077
Abstract
This study investigated the effect of ascorbic acid (vitamin C) and proline amino acid alone or together on the quality and fertility of frozen/thawed honey bee spermatozoa. The experiments were designed to compare a single ascorbic acid, a single proline amino acid, and different combinations of ascorbic acid with proline amino acid on the cryopreservation of honey bee semen based on sperm motility, viability, intact membrane (hypo-osmotic swelling test), and fertility rates. Eight cryopreserved study groups comprised Control II with no supplement, along with groups with ascorbic acid (2 mg), proline 25 mM, proline 50 mM, proline 100 mM, and combination groups of both ascorbic acid (2 mg) and proline 25 mM, proline 50 mM, and lastly proline 100 mM groups, respectively. Using 50 mM proline in the tested groups had the greatest impact on sperm motility, viability, the percentage of spermatozoa with intact membrane, and fertility. The cryopreservation process caused a gradual decrease in motility, viability, intact membrane (p < 0.05), and fertility rates (p < 0.01) in all the tested research groups as against the fresh semen control group. Successful honey bee sperm cryopreservation and fertility are achievable when using an appropriate sperm freezing protocol and antioxidant. Proline amino acid as an antioxidant in semen extender had a more beneficial influence on sperm quality parameters and fertility. The success of cryopreservation with antioxidants is related to the chosen antioxidant in a dose-dependent manner.Keywords
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