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4 results for “Transgenerational thermal effect”
Data of transgenerational effects of thermal stress in embryos of O. maya
<p>To evaluate the transgenerational effect of thermal stress on the cephalopod <em>Octopus maya</em>, this study experimentally tests the morphology, respiratory metabolism, antioxidant mechanisms, and oxidative stress indicators of the embryos incubated at two temperatures (24 and 30°C) produced by females acclimated at 24 (non-stressed) and 30°C (stressed). The data set is organized in such a form that researchers will have embryo morphometric data (eye diameter, arm length, mantle length, yolk length, egg length egg wide, and wet weight of O. maya. Also, there is the oxygen consumption and antioxidant defense enzymes, oxidant damage, and esterase activity of embryos from stressed and nonstressed females. The results demonstrate that, regardless of their incubation temperature, embryos from females acclimated at 30°C are smaller, show more accelerated development, and have higher respiratory rates than those from females acclimated at 24°C. These embryos confirmed a greater oxidative stress degree, as well as an increased amount of soluble carbonylated proteins and catalase activity as the main enzyme during the activation development stage (even the highest in the embryos incubated at 30°C). Finally, a collapse of the antioxidant defense system was observed, measured as lower both CAT activity and GSH concentrations. Additionally, soluble carbonylated proteins reduced and GST activity increased in embryos incubated at 30°C from females maintained at high temperatures in a clear deleterious and transgenerational effect of thermal stress on this octopus species.</p>
Thermal transgenerational effects remain after two generations
<p>Transgenerational plasticity (TGP) is increasingly recognized as a mechanism by which organisms can respond to environments that change across generations. Although recent empirical and theoretical studies have explored conditions under which TGP is predicted to evolve, it is still unclear whether the effects of the parental environment will remain beyond the offspring generation. Using a small cyprinodontid fish, we explored multi-generational thermal TGP to address two related questions. First (experiment 1), does the strength of TGP decline or accumulate across multiple generations? Second (experiment 2), how does the experience of a temperature novel to both parents and offspring affect the strength of TGP? In the first experiment, we found a significant interaction between F1 and F2 temperatures and juvenile growth, but no effect of egg diameter. The strength of TGP between F0 and F1 generations was similar in both experiments but declined in subsequent generations. Further, experience of a novel temperature accelerated the decline. This pattern, although similar to that found in other species, is certainly not universally observed, suggesting that theoretical and empirical effort is needed to understand the multi-generational dynamics of TGP.</p>
Thermal transgenerational effects remain after two generations
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Data from: No evidence for thermal transgenerational plasticity in metabolism when minimizing the potential for confounding effects
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