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Other Glycolytic Pathways01:24

Other Glycolytic Pathways

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The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
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Empirical, Metagenomic, and Computational Techniques Illuminate the Mechanisms by which Fungicides Compromise Bee Health
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热暴露限制了熊蜂中酸通路活性.

Giulia S Rossi1,2, Alaa Elbassiouny1, Jerrica Jamison1

  • 1Department of Biological Sciences, University of Toronto, 1265 Military Trail, Scarborough, ON M1C 1A4, Canada.

Conservation physiology
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概括

气候变化影响了像Bombus impatiens这样的熊蜂. 热应激降低了酸通路的活性,限制了抗氧化剂的潜力,并可能影响授粉服务.

关键词:
气候变化 气候变化 气候变化葡萄糖 葡萄糖 葡萄糖 是 一种代谢途径 代谢途径氧化应激是一种氧化应激.授粉者是授粉者.热应力是一种热应力.

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科学领域:

  • 生态生态学 生态生态学
  • 身体生理学 身体生理学
  • 气候变化生物学 气候变化生物学

背景情况:

  • 由于气候变化,大黄蜂种群在全球范围内正在减少,这影响了重要的授粉服务.
  • 庞布斯不耐烦 (Bombus impatiens) 是一个经济上重要的熊蜂物种,面临极端高温事件的威胁.
  • 酸通路 (PPP) 对于通过糖产生抗氧化潜力至关重要.

研究的目的:

  • 为了研究底层的生理机制Bombus不耐烦易受极端的热量.
  • 测试热暴露是否会限制酸通路 (PPP) 的活性.

主要方法:

  • 在Bombus impatiens中跟踪PPP活动,使用同位素标记的葡萄糖休息,运动和恢复期间.
  • 在中度 (22°C) 和高 (32°C) 温度下比较PPP活动.
  • 在暴露于热量后评估氧化损伤和抗氧化潜力 (GSH:GSSG比).

主要成果:

  • 在高ATP需求 (运动) 和暴露于热量期间,Bombus impatiens的PPP活性下降.
  • 暴露在32°C的蜜蜂显示GSH:GSSG比率较低,表明抗氧化能力降低.
  • 观察到最小的氧化损伤,但在热应激下,抗氧化能力受到损害.

结论:

  • 急性热应激显著限制了Bombus impatiens中的PPP活性和抗氧化剂潜力.
  • 重复的热应激可能会对这种物种产生严重的生理后果.
  • 这些发现表明,这可能对北美授粉服务产生负面影响.