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由无毒氧化纳米颗粒诱导的光系统II功能的荷尔蒙反应

Panagiota Tryfon¹, Ilektra Sperdouli², Julietta Moustaka³

¹Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.

International journal of molecular sciences

|August 10, 2024

概括

涂有oleylamine的氧化纳米颗粒[Ca(OH) ₂@OAm NPs]最初降低了但后来提高了番茄植物光系统II (PSII) 的效率. 这些纳米粒子调节非光化学火 (NPQ),促进电子传输,并可能增加作物产量.

科学领域:

植物生理学植物生理学
纳米技术纳米技术
农业科学农业科学

背景情况:

无机纳米颗粒,如氧化纳米颗粒[Ca(OH) ₂NP,正在探索它们提高植物光合作用和农业产量的潜力.
用oleylamine涂层的氧化纳米颗粒[Ca(OH) ₂@OAm NPs]进行了合成,并根据它们的物理性质进行了表征.

研究的目的:

为了研究Ca(OH)₂@OAmNP在不同的光照条件下对番茄植物的光系统II (PSII) 光化学的影响.
了解NPQ调节和反应性氧物种 (ROS) 生成的基本机制,以应对Ca(OH) ₂@OAm NP应用.

主要方法:

番茄植物被喷了15和30毫克的L^-1Ca(OH) ₂@OAm NPs.
在增长辐射 (GI) 和高辐射 (HI) 时评估了PSII光化学.
测量包括PSII效率,过度激发能量,开放的PSII反应中心 (qP),激发捕获效率 (Fv'/Fm'),非光化学火 (NPQ) 和反应性氧物种 (ROS) 生成.

主要成果:

在90分钟内,OAm NPs最初降低了PSII效率,并增加了过度激发能量.
72小时后,PSII效率 (ΦE) 由于PSII反应中心 (qP) 的开放增加和激发捕获 (Fv'/Fm') 的改进而提高.
减少NPQ导致ROS生成增加,而电子传输速率 (ETR) 提高,影响在GI比HI更为明显.

结论:

@OAm NPs调节NPQ,增强ETR,并降低番茄叶中的过度刺激能量.
增强PSII功能与ROS生成有关,这表明它在光能信号传输中起着有益的作用.
@OAm NPs显示出作为光合作用生物刺激剂的潜力,用于提高作物产量.

关键词:

生物刺激剂生物刺激剂叶绿素光成像分析分析对于PSII的有效量子收益率.过多的兴奋,过多的激发,过多的能量.无机纳米粒子无机纳米粒子微波辅助合成是微波辅助的合成.不用光化学火的方式火.有活性氧物种的反应性氧物种.一个单一的氧气.

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