Potencial antioxidante do extrato aquoso do fruto do noni em diluente para congelação de sêmen ovino

• Autor(a) principal: Nascimento, Anna Lauren Costa
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: https://ri.ufs.br/handle/riufs/6370
• topic: Espermatozoides; Meio diluidor; Lipoperoxidação; Antioxidantes; Zootecnia; Reprodução de ovinos; Sêmen; Noni (Planta); Antioxidant; Sperm; Lipid peroxidation; Means thinner; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA

It is known that antioxidants when added to extenders can contribute to preserving the integrity of sperm cells. How noni is considered a fruit with antioxidant potential, aimed to evaluate the feasibility of ram semen subjected to dilution in medium containing different amounts of aqueous extract of noni (Morinda citrifolia L). Initially noni cropped and then elaborated the aqueous extract to be added to the medium thinner. The fruit was evaluated for its physical and chemical characteristics as presenting results ph = 4.12; Titratable acidity = 8.78%; Soluble solids = 8.18 ° Brix and Vitamin C = 309.43 mg.100-1 content. The aqueous extract produced was evaluated for quantification of total phenolic compounds, antioxidant activity and ability to inhibit lipid peroxidation, with amounts of total phenols of 47.96 ± 1.95 mg Eq. Gálico.100g acid-1 extract. Concentration of 3.0 μg.mL-1 time 30 minutes had antioxidant activity 89.35 ± 2.32% It was observed that only 1.2 ± 0.15 ug / ml of sample is sufficient to reduce the DPPH by 50%. It also exhibited excellent redox ability to inhibit lipid peroxidation in a concentration of 10 μg.mL-1, similar to the synthetic Trolox positive control (p <0.05) at 72 The Extract concentrations and 120μg.mL-1 was able to inhibit lipid peroxidation in the thinner half in 21.75% and 51.32%. Treatments for ram semen freezing differ in the use of thinner medium containing different concentrations of the extract: T1- control without addition; T2 24 mg / mL; T3-72 / mL; T4 - 120 mg / mL. A total of 16 ejaculates were collected, diluted according to the treatments and frozen. After thawing the semen was subjected to heat resistance test (TTR) and evaluated for the subjective motility, sperm vigor, health test hypoosmotic swelling test plasma membrane, supravital test, and the combination of SYBR Green and fluorochrome propidium iodide (PI ), and the status of sperm capacitation and acrosome reaction by clortetracliclina (CTC). The results found for TTR showed T2 with better motility 22.6 ± 9.7; than the other treatments with the addition of extract, while the T1 and T2 treatments showed better effect than T4; in hiposmotic test T3 was superior to T2 after two hours of incubation; T4 showed better preservation of the plasma membrane and the sperm capacitation treatments differ P <0.05 only for trained with sperm acrosome reacted. Also the kinetic analysis was performed using a computerized system at the time of thawing and the percentages for progressive motility in T1, T2, T3 and T4 were 26.9 ± 9.7; 20.1 ± 12.6; 20.7 ± 10.8 and 15.5 ± 9.2 respectively, for the curvilinear velocity parameters (VCL) and the average speed path (VAP) T1 and T2 shown to be superior to T3 and T4, and amplitude lateral displacement of the head (ALH) T4 showed inferiority to the other tested treatments. No difference was observed for straight-line speed (VSL), straightness (STR) and linearity (LIN). The treatments with the addition of aqueous extract of noni showed higher viability than control.