调整番茄光系统II光化学与工程氧化纳米棒的修改
Panagiota Tryfon1, Ilektra Sperdouli2, Ioannis-Dimosthenis S Adamakis3
1Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
Plants (Basel, Switzerland)
|October 14, 2023
概括
工程造型的棒状氧化纳米棒 (ZnO NRs) 被涂上烯胺,通过降低光系统II的效率和增加活性氧物种,对番茄植物的光合作用产生了负面影响. 纳米粒子形状对于农业应用至关重要.
科学领域:
- 农业纳米技术的使用
- 植物生理学 植物生理学
- 纳米材料科学 科学 纳米材料科学
背景情况:
- 工程氧化物纳米粒子 (ZnO NPs) 涂有烯胺 (OAm) 之前被提出作为生物刺激剂,以提高作物产量.
- 纳米粒子形状对它们在植物中的生物活性的影响需要进一步研究.
研究的目的:
- 评估新设计的带有烯胺 (ZnO@OAm NRs) 涂层的棒形ZnO纳米棒 (NRs) 对番茄植物的光合作用功能和反应性氧物种 (ROS) 生成的体内影响.
- 阐明纳米粒子形状和涂层在它们的农业有效性中的作用.
主要方法:
- 使用溶热合成生产 ZnO@OAm NRs.
- 描述了 ZnO@OAm NR 的物理化学特性 (结晶体大小,有机涂层,水力动力直径, ζ-潜力).
- 番茄植物经过ZnO@OAm NRs的叶子喷雾,随后的测量包括叶绿素含量,氧进化复合体 (OEC) 效率,ROS生成和光系统II (PSII) 参数 (Fv/Fm,ETR,FPSII).
主要成果:
- ZnO@OAm NRs对叶绿素含量表现出抑制作用,最初增加了叶绿素含量,然后恢复到控制水平.
- 应用后90分钟观察到OEC效率显著下降,ROS生成增加,PSII效率降低 (Fv/Fm,ETR,ΦPSII).
- 减少的ETR和FPSII归因于PSII反应中心 (Fv'/Fm') 的效率下降,而过多的激发能量和开放的PSII反应中心保持不变.
结论:
- 棒形ZnO@OAm NRs对PSII光化学有负面影响,并增加番茄植物中的ROS生成.
- 这与不规则形状的ZnO@OAm NP形成鲜明对比,这些NP以前被证明可以提高PSII的效率.
- 纳米粒子形状和有机涂层是决定它们的生物活性和潜在农业应用的关键因素.
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