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首页> 外文期刊>Journal of Insect Physiology >Distinct effects of different temperatures on diapause termination, yolk morphology and MAPK phosphorylation in the silkworm, Bombyx mori
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Distinct effects of different temperatures on diapause termination, yolk morphology and MAPK phosphorylation in the silkworm, Bombyx mori

机译：不同温度对家蚕家蚕滞育终止，卵黄形态和MAPK磷酸化的不同影响

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摘要

Previously, we showed that chilling of diapausing Bombyx eggs activated ERK/MAPK in yolk cells coincidentally with acquisition of developmental competence, and that ERK regulates diapause termination via activating transcription of key enzyme genes for ecdysteroid and sorbitol metabolism. To further elucidate the molecular mechanisms of temperature signaling and diapause termination, effects of different temperatures on diapause termination, yolk morphology, and ERK and p38 MAPK phosphorylation were analyzed. We confirmed the coincidence of diapause termination and changes of phosphorylated levels of ERK and p38 MAPK at various temperatures. Our study also shows that different temperatures have distinct effects on diapause termination and yolk morphology, however, these two effects did not always coincide. Our analyses suggest the possibility that the effects on diapause termination and yolk morphology are independently regulated by ERK. We observed that a temperature shift alters diapause intensity reversibly, and coincidental changes of phosphorylated ERK levels suggest that ERK may have a role in regulating the diapause intensity. The present study suggests that ERK and p38 MAPK have roles for transmitting the temperature signals that are important for diapause termination.
机译：以前，我们显示了滞育性的家蚕卵的冷却激活了卵黄细胞中的ERK / MAPK，同时获得了发育能力，并且ERK通过激活蜕皮激素和山梨醇代谢的关键酶基因的转录来调节滞育终止。为了进一步阐明温度信号和滞育终止的分子机制，分析了不同温度对滞育终止，蛋黄形态以及ERK和p38 MAPK磷酸化的影响。我们证实了在不同温度下滞育终止和ERK和p38 MAPK磷酸化水平变化的巧合。我们的研究还表明，不同的温度对滞育终止和卵黄形态具有明显的影响，但是，这两种影响并不总是一致的。我们的分析表明，对滞育终止和蛋黄形态的影响可能受ERK的独立调节。我们观察到温度变化可逆地改变滞育强度，磷酸化ERK水平的同时变化表明ERK可能在调节滞育强度中起作用。本研究表明，ERK和p38 MAPK在传递对于滞育终止很重要的温度信号中具有作用。

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