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Comparative and Evolutionary Physiology Commons™
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- Academic -- UNF -- Biology; American lobster; hepatopancreas; brush border membrane vesicles; BBMV (1)
- Academic -- UNF -- Master of Science in Biology; Dissertations (1)
- Thesis; University of North Florida; UNF; Dissertations (1)
- Thesis; University of North Florida; UNF; Dissertations; Academic -- UNF -- Master of Science in Biology; Dissertations; Academic -- UNF -- Biology; Romalea microptera; VgRNAi; vitellogenin; RNAi; lifespan; reduced reproduction (1)
Articles 1 - 2 of 2
Full-Text Articles in Comparative and Evolutionary Physiology
Comparative Sugar Transport By Crustacean Hepatopancreas And Intestine, Ada Duka
Comparative Sugar Transport By Crustacean Hepatopancreas And Intestine, Ada Duka
UNF Graduate Theses and Dissertations
Glucose is transported in crustacean hepatopancreas and intestine by Na+-dependent co-transport, while Na+-dependent D-fructose influx has only been described for the hepatopancreas. It is still unclear if the two sugars are independently transported by two distinct cotransporter carrier systems. In this study lobster (Homarus americanus) hepatopancreas brush border membrane vesicles (BBMV) were used to characterize, in detail, the cation-dependency of both D-[3H] glucose and D-[3H] fructose influxes, while in vitro perfused intestines were employed to determine the nature of cation-dependent sugar transport in this organ. Over the sodium concentration range …
Knockdown Of Vitellogenin By Rnai Increases Survivorship But Exhibits Similar Physiological Responses To Ovariectomy In Grasshoppers, Alicia G. Linquist
Knockdown Of Vitellogenin By Rnai Increases Survivorship But Exhibits Similar Physiological Responses To Ovariectomy In Grasshoppers, Alicia G. Linquist
UNF Graduate Theses and Dissertations
Reduced reproduction has been shown to increase lifespan in many animals, yet the mechanisms behind this trade-off are mostly unknown. A previous study has shown that in the lubber grasshopper, Romalea microptera, ovariectomized (OVX) individuals have a 30% increase in lifespan relative to controls (Sham). In a separate study, an increase in fat body mass and a halting of ovarian growth were seen upon reduction of vitellogenin transcript via RNAi (VgRNAi). These data suggest that VgRNAi increases lifespan through the trade-off between reproduction and longevity and animals with combined ovariectomy and VgRNAi, might show additive physiological responses. In this …