通过限制的转移和调节粉合成代谢基因表达来减轻的毒性
Ziyuan Yang1, Fuqing Sui1, Zhaojun Nie1
1State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, Key Laboratory of Soil Pollution Control and Remediation of Henan Province, College of Resources and Environment, Henan Agricultural University, Zhengzhou 450046, China.
Ecotoxicology and environmental safety
|February 7, 2026
概括
(Se) 通过改善光合作用和生物质,减轻小麦中的 (Cd) 毒性. 它还调节碳代谢基因,并减少Cd在子中的积累.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 植物生理学 植物生理学
背景情况:
- (Cd) 污染对作物产量和人类健康产生负面影响.
- 小麦积累了Cd,其光合作用系统对Cd压力的反应需要进一步研究.
- (Se) 是一种重要的微量营养素,具有潜在的保护作用.
研究的目的:
- 调查Se对小麦中Cd毒性的缓解作用.
- 了解Se减轻小麦光合作用系统和碳代谢中的Cd压力的机制.
主要方法:
- 小麦经受Cd应力,有和没有Se应用.
- 测量包括生物质,光合作用参数,叶绿素含量,叶子结构,基因表达 (TaAGPS1,TaSUT2,TaSWEET15),可溶糖和粉含量以及矿物元素分析 (Cd,Fe,Mn,Zn).
主要成果:
- 在Cd压力下,Se的应用增加了小麦生物质 (2050%),光合作用参数 (2655%),以及叶含量 (1729%).
- 它调节了关键的粉合成基因,恢复了可溶糖 (1621%) 和粉含量 (1559%).
- Se降低了中Cd含量 (619%) 并增加了中Fe,Mn和Zn含量.
结论:
- Se有效地减轻小麦中的Cd毒性,增强生长和光合作用效率.
- Se通过调节关键基因表达来调节碳代谢,改善碳水化合物状态.
- Se限制了Cd转移到芽部,并改善了Fe,Mn和Zn等必需矿物质的吸收.
相关概念视频
Constitutive and Regulated Gene Expression
1.2K
Gene expression in prokaryotes is governed by constitutive and regulated systems, allowing cells to balance the production of essential proteins with adaptive responses to environmental changes.Constitutive Gene ExpressionConstitutive, or housekeeping, genes are continuously expressed as they encode proteins vital for fundamental cellular processes. These include enzymes for glycolysis, ribosomal components for protein synthesis, and proteins involved in DNA replication. Their constant...
1.2K
What is Gene Expression?
196.9K
Overview
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
Gene expression is the process in which DNA directs the synthesis of functional products, that is, proteins. Cells can regulate gene expression at various stages. It allows organisms to generate different cell types and enables cells to adapt to internal and external factors.
Genetic Information Flows from DNA to RNA to Protein
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is made up of nucleotides and proteins consist of amino...
196.9K
What is Gene Expression?
11.5K
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
11.5K
Cell Specific Gene Expression
16.6K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
16.6K
Regulation of Expression Occurs at Multiple Steps
26.5K
Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
26.5K
Chromatin Position Affects Gene Expression
24.9K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
24.9K


