纳米颗粒改变了植物内化和间化相互作用的性质和强度
Elizabeth A Esser1,2, Jiaqi Tan3, Na Wei4,5,6
1State Key Laboratory of Plant Diversity and Specialty Crops, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei, 430074, China.
Scientific reports
|April 15, 2025
概括
工程纳米颗粒改变了植物的相互作用,多倍体草在氧化铜纳米颗粒下表现出减少的竞争. 这突出了对生态社区和纳米技术影响的特定效应.
科学领域:
- 生态毒理学 生态毒理学
- 植物生态学植物生态学
- 纳米技术纳米技术
背景情况:
- 工程纳米粒子显著影响有机体,但它们对生态社区内的物种相互作用的影响尚不清楚.
- 了解纳米粒子暴露如何影响生物间关系对于预测社区动态和生态后果至关重要.
研究的目的:
- 为了研究氧化铜 (CuO) 纳米颗粒对植物物种相互作用的影响,研究了Fragaria.的不同类型 (二倍体和多倍体) 的不同类型 (二倍体和多倍体) 的植物物种相互作用.
- 确定纳米颗粒暴露是否以一种特定于 ploidy 的方式改变竞争性和促进性相互作用.
主要方法:
- 在受控条件下,在 axenic 微观宇宙中培育双倍体和多倍体 Fragaria 植物.
- 暴露于氧化铜 (CuO) 纳米粒子和散装CuO粒子.
- 使用相对相互作用指数 (RII) 量化植物相互作用,以衡量竞争和促进.
主要成果:
- 多倍体Fragaria在接触CuO纳米颗粒时表现出减少竞争和转向促进,特别是在与其他多倍体或双倍体相互作用时.
- 与对照对象相比,暴露于CuO散装颗粒的多类动物的竞争相互作用增加了.
- 双胞胎Fragaria显示中性相互作用,无论暴露于纳米颗粒或散装颗粒.
结论:
- 纳米粒子暴露会诱导植物物种相互作用中的特定变化,与应力梯度假设保持一致.
- 对纳米颗粒污染的生态反应取决于性水平,强调在风险评估中需要考虑物种相互作用.
- 结果为保护战略和纳米技术在生态系统中的可持续应用提供了洞察力.
相关概念视频
01:21Nondisjunction
3.7K
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
3.7K
03:09Meiosis I
35.5K
Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
Prophase I is the most extended and complex step of meiosis I characterized by synapsis, chromosome pairing, and recombination of the homologous chromosomes. This process is facilitated by a proteinaceous structure called the...
35.5K
02:13Overview of Transposition and Recombination
15.1K
Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
15.1K
01:31Formation of Species
38.7K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
38.7K
02:57Meiosis vs. Mitosis
50.8K
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
50.8K
02:57piRNA - Piwi-interacting RNAs
6.7K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
6.7K