水氧化与碳氧化纳米管:对秋季军虫发育,繁殖和种群动态的差异影响
Zhao Wang1, Syed Husne Mobarak2, Fa-Xu Lu2
1College of Life and Health Science, Kaili University, 3 Kaiyuan Road, Kaili 556011, China.
Insects
|August 28, 2025
概括
功能化碳纳米管显示出新型害虫控制剂的潜力. 水氧化和碳氧化多壁碳纳米管 (MWCNTs) 抑制了秋季军虫的发育和繁殖以剂量依赖的方式.
科学领域:
- 农业科学
- 纳米技术
- 昆虫学
背景情况:
- 碳纳米管 (CNT) 提供了农业的好处,比如提高了作物的弹性.
- 对于昆虫害虫,特别是像秋季军虫 (Spodoptera frugiperda) 这样的虫害虫,CNT的影响尚不清楚.
- 正在探索各种应用的功能化CNT,包括潜在的农业化学交付.
研究的目的:
- 研究化 (MWCNTs-OH) 和碳化 (MWCNTs-COOH) 多壁碳纳米管对秋季军虫 (Spodoptera frugiperda) 的发育和繁殖的影响.
- 评估功能化MWCNT作为新型防虫剂对S.frugiperda的潜力.
主要方法:
- 幼虫被食含有不同度的MWCNTs-OH和MWCNTs-COOH.
- 用年龄阶段,两性生命表方法来评估对发育和生殖参数的影响.
- 分析了包括净生殖率 (R0),内在增长率 (r) 和有限增长率 (λ) 在内的关键人口增长指标.
主要成果:
- MWCNTs-OH和MWCNTs-COOH都对秋季军虫的发育和繁殖表现出度依赖的抑制作用.
- 在最高剂量 (4 mg/ g) 时,幼虫发育时间延长,成体产卵前期增加,生育能力显著下降,而MWCNTs- OH则表现出更强烈的影响.
- 人口增长参数 (R0,r,λ) 被抑制,平均生成时间 (T) 被延长,特别是MWCNTs-OH.
结论:
- 功能化的MWCNTs,特别是MWCNTs-OH,可以显著阻碍Spodoptera frugiperda的发展和繁殖.
- 这些发现表明,功能化的MWCNT有望成为农业中秋军虫种群的新型,更环保的害虫控制剂.
相关概念视频
01:15Metabolism of Chemolithotrophs
1.3K
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
1.3K
01:24Freshwater Microbial Ecology
66
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic...
66
01:27Microbes and Climate Change
100
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
100