相关实验视频

Updated: Jun 26, 2025

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

A Method to Preserve Wetland Roots and Rhizospheres for Elemental Imaging

Published on: February 15, 2021

在米中的特定组织沉积,物种化和运输

Hengliang Huang¹, Naoki Yamaji¹, Jian Feng Ma¹

¹Institute of Plant Science and Resources, Okayama University, Kurashiki 710-0046, Japan.

Plant physiology

|May 18, 2024

概括

大米通过其根中的Lsi1转运器,主要以Sb (III) 的形式吸收有毒的反 (Sb). 这限制了Sb转移到芽,增强了植物对抗氧化物毒性的耐受性.

科学领域:

环境科学环境科学
植物生物学植物生物学
毒理学毒理学毒理学

背景情况:

米 (Oryza sativa) 是一种饮食主食,存在 (Sb) 暴露的风险.
了解大米中的Sb积累对于食品安全至关重要.
植物中Sb吸收和转移的机制在很大程度上是未知的.

研究的目的:

为了研究米中Sb的特定组织沉积,物种化和运输.
确定控制根中Sb吸收和积累的分子机制.
评估载体在Sb运输中的作用以及大米对Sb毒性的耐受性.

主要方法:

激光切除-诱导合等离子体质谱学 (LA-ICP-MS) 用于Sb沉积分析.
酵母运输测定以确定Sb (III) 和Sb (V) 通过Lsi1.1运输.
在大米中对Lsi1,Lsi2和Lsi3进行基因淘汰研究,以分析Sb积累和耐受性.
在根细胞汁中分析Sb物种化.

主要成果:

Sb(III) 是大米吸收的首选形式,在根部保留超过98%.
Sb主要沉积在根外皮中.
载体Lsi1促进Sb(III) 的吸收,Lsi1的淘汰会显著减少Sb的积累,并增加Sb的耐受性.
淘汰Lsi2和Lsi3并没有影响Sb积累.

结论:

Lsi1是主要的运输体,负责大米根中Sb (III) 的吸收.
由于其沉积在根外皮中,并且没有已识别的Sb外流载体,所以Sb从根部到芽部的转移有限.
在大米对Sb毒性的反应中,Lsi1起着关键作用.

更多相关视频

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration

Published on: December 5, 2019

Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.

Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.

Published on: September 1, 2017

相关概念视频

Precipitation and Co-precipitation

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...