转录因子OsMYB2触发氨基酸载体OsANT1的表达,以调节的生长和盐耐受性
Shengsong Nie1, Weiting Huang1, Chongchong He1
1Key Laboratory of Functional Agriculture of Guizhou Provincial Higher Education Institutions, Key Laboratory of Molecular Breeding for Grain and Oil Crops in Guizhou Province, Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Agricultural Sciences, Institute of Rice Industry Technology Research, Guizhou University, Guiyang 550025, China.
Plant physiology
|October 19, 2024
概括
转录因子OsMYB2调节米中的氨基酸载体OsANT1,增强生长和盐耐受性. 这一途径对于适应环境压力至关重要.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 生物化学 生化学
背景情况:
- 氨基酸运输体 (AAT) 对于植物的发育和抗压能力至关重要.
- 酸 (ABA) 信号在调节大米盐应激下AAT转录中的作用尚不清楚.
研究的目的:
- 通过盐应激下ABA信号通路研究大米AAT基因表达的调节.
- 阐明OsMYB2转录因子及其目标基因OsANT1在米生长和盐耐受性中的功能.
主要方法:
- 基因表达分析 (RT-qPCR) 用于在正常和盐应激条件下评估OsANT1和OsMYB2水平.
- 发起者-报告者测试以确认OsMYB2与OsANT1发起者结合.
- 在大米中进行了OsMYB2过度表达研究,以评估其对生长和应激耐受性的影响.
主要成果:
- OsMYB2 直接促进 OsANT1 的表达,这是一种氨基酸载体,参与了林和白氨酸的运输.
- 米根中的盐应激诱导了OsANT1的表达,导致林积累增加和抗氧化活性增强.
- 过度表达OsMYB2提高了水耕作,产量和盐分耐受性,伴随着OsANT1表达的增加.
结论:
- ABA信号通路组件OsMYB2通过调节氨基酸载体基因OsANT1.1的表达来调节的生长和盐耐受性.
- 这种OsMYB2-OsANT1调节轴提供了一种分子机制,以ABA为媒介,适应大米中的盐应激.
相关概念视频
Responses to Salt Stress
13.0K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.0K
Global Regulatory Systems
2
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
2
Riboswitches
8.1K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
8.1K
Translational Regulation
1
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
1
Tonicity in Plants
30.1K
Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...
30.1K
Oxygen Requirements and Growth Patterns
1
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
1


