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不同锌镉浓度对玉米幼苗光合与氧化过程的影响：从必需功能向毒性功能的转变

Alterations of Photosynthetic and Oxidative Processes Influenced by the Presence of Different Zinc and Cadmium Concentrations in Maize Seedlings: Transition from Essential to Toxic Functions.

作者信息

Jócsák Ildikó, Csima Ferenc, Somfalvi-Tóth Katalin

机构信息

Institute of Agronomy, Hungarian University of Agriculture and Life Sciences, 7400 Kaposvár, Hungary.

出版信息

Plants (Basel). 2024 Apr 20;13(8):1150. doi: 10.3390/plants13081150.

DOI:10.3390/plants13081150
PMID:38674559
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11055138/
Abstract

BACKGROUND

The study examined the impact of varying the concentrations of zinc (Zn) on plant responses, particularly on photosynthetic and oxidative metabolic processes. This investigation aimed to distinguish between the beneficial and harmful effects of Zn on plants, highlighting significant nutrient supply concerns.

METHODS

The investigation methods were centered around non-invasive methods, such as biophoton emission (delayed fluorescence-DF, ultra-weak bioluminescence-UWLE), fluorescence induction (F/F) measurements, chlorophyll content estimation (SPAD) and vegetation index (NDVI) determination. Furthermore, the analytical determination of lipid oxidation (MDA level) and antioxidant capacity (FRAP) as well as gene expression studies of the antioxidative enzymes glutathione reductase (GR), glutathione S-transferase (GST) and lipoxygenase (LOX) for essential Zn and nonessential cadmium (Cd) were also carried out in order to clarify toxic symptoms through different Zn investigation approaches.

RESULTS

It was possible to identify a metabolic enhancement from 1000 µM; however, stress symptoms from the 2000 µM Zn treatment were noted for both the investigated photosynthetic and oxidative processes. The outcomes of this research contribute to the improvement of Zn mineral-supplementation technology, which is essential for maize growth, and the optimization of agricultural practices.

摘要

背景

本研究考察了不同浓度锌（Zn）对植物反应的影响，特别是对光合和氧化代谢过程的影响。本调查旨在区分锌对植物的有益和有害影响，突出重要的养分供应问题。

方法

调查方法主要围绕非侵入性方法展开，如生物光子发射（延迟荧光-DF、超微弱生物发光-UWLE）、荧光诱导（F/F）测量、叶绿素含量估算（SPAD）和植被指数（NDVI）测定。此外，还进行了脂质氧化（丙二醛水平）和抗氧化能力（FRAP）的分析测定，以及针对必需元素锌和非必需元素镉（Cd）的抗氧化酶谷胱甘肽还原酶（GR）、谷胱甘肽S-转移酶（GST）和脂氧合酶（LOX）的基因表达研究，以便通过不同的锌研究方法阐明毒性症状。

结果

可以确定从1000微摩尔起代谢增强；然而，在2000微摩尔锌处理中，所研究的光合和氧化过程均出现了胁迫症状。本研究结果有助于改进对玉米生长至关重要的锌矿物补充技术，并优化农业实践。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1eb/11055138/c6da7f28bf7f/plants-13-01150-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1eb/11055138/23f5dbca4a01/plants-13-01150-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1eb/11055138/046e9221dc63/plants-13-01150-g008.jpg
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