相关实验视频

Updated: Jul 5, 2025

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

In Situ Detection and Single Cell Quantification of Metal Oxide Nanoparticles Using Nuclear Microprobe Analysis

Published on: February 3, 2018

二氧化纳米颗粒和光之间的相互作用可以对植物生理反应产生双重影响

Aleksandra Orzechowska¹, Renata Szymańska², Michał Sarna³

¹AGH University of Krakow, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059, Kraków, Poland. Aleksandra.Orzechowska@fis.agh.edu.pl.

Environmental science and pollution research international

|January 24, 2024

概括

二氧化纳米颗粒 (TiNPs) 改变了Arabidopsis thaliana中的叶绿体,影响了膜弹性和热反应. 更高的TiNP度可能会减轻高光应激,令人惊的是,植物受益.

科学领域:

植物生理学植物生理学
纳米毒理学研究
生物物理学的生物物理.

背景情况:

模型植物Arabidopsis thaliana易受环境压力因素的联合影响.
二氧化纳米颗粒 (TiNPs) 越来越多地研究它们对环境的影响.
高光条件诱导植物中的光氧化应激.

研究的目的:

为了研究二氧化纳米颗粒 (TiNPs) 结合高光应激对Arabidopsis thaliana的影响.
分析TiNPs对叶绿体形态,纳米机械性质和热反应的影响.
评估TiNPs对强光诱导损伤的保护潜力.

主要方法:

在强光下,将Arabidopsis thaliana暴露于不同度的TiNP (250,500,1000μg/mL).
非侵入性热成像,以评估动态光下的植物热反应.
测量叶绿体的纳米机械性能和膜弹性.
使用OJIP参数分析光系统II (PSII) 的光化学效率.

主要成果:

TiNPs改变了叶绿体形态和减少了膜弹性.
在动态光下,TiNPs诱导了热反应的延迟,并缩短了热时间常数.
与TiNPs一起观察到PSII光化学效率的下降和能量消耗的增加.
超过250μg/mL的TiNP度似乎可以减轻OJIP参数上的高光应激效应.

结论:

在压力下,TiNP会影响植物细胞结构和热调节.
在超过250μg/mL的度下,TiNPs可能会对高光应激产生保护作用.
需要进一步的研究,以了解TiNP诱导的植物减轻压力的机制.

关键词:

阿拉比多普西斯 (Arabidopsis) 是一种植物.高光照明高光照明关节压力因素关节压力因素光引起的热动力学.光合作用效率的效率.二氧化纳米颗粒的二氧化.

更多相关视频

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro

Method for the Assessment of Effects of a Range of Wavelengths and Intensities of Red/near-infrared Light Therapy on Oxidative Stress In Vitro

Published on: March 21, 2015

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

Published on: February 2, 2022

相关概念视频

Photoreceptors and Plant Responses to Light

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.

The Antenna Complex

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency...