在口腔关闭中协调植物氨酸和酸信号
Xue Li1,2, Lin Xiao1, Yanjie Song1,2
1Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, China.
Plant, cell & environment
|July 10, 2025
概括
植物氨酸和酸协调口腔关闭和植物免疫. 植物氨酸受体1 (PMTR1) 是这些过程的关键,连接氨酸和SA信号通路.
科学领域:
- 植物生物学 植物生物学
- 分子植物病理学 分子植物病理学
背景情况:
- 植物氨酸 (PMT) 和酸 (SA) 是重要的植物激素,参与口腔调节和免疫反应.
- 它们协调作用背后的精确分子机制仍未完全阐明.
研究的目的:
- 调查植物氨酸受体1 (PMTR1) 在调解PMT和SA对口腔关闭和植物免疫的影响中的作用.
- 在这些过程中阐明连接PMT和SA的信号通路.
主要方法:
- 对SA生物合成和信号组件的基因表达分析.
- 对NPR1核定位的调查.
- 在野生型和突变植物中分析口腔关闭和细菌入侵.
- 染色体免疫沉测定用于评估转录因子结合.
主要成果:
- SA诱导的口腔关闭和ROS产生取决于PMTR1,它调节PRX33和PRX34基因表达.
- 外源性黑激素 (exMT) 调高SA生物合成基因,NPR1和TGA转录因子,通过NO和GSH信号以PMTR1依赖的方式促进NPR1核定位.
- 通过exMT和SA以TGA1依赖的方式诱导PMTR1表达,TGA1直接与PMTR1促进体结合.
- 在NPR1和TGA转录因子中的突变对PMTR1介导的信号传递表现出部分不敏感.
- 由PMTR1调节的exMT和SA诱导的口腔关闭,对于防止细菌入侵至关重要.
结论:
- PMTR1和NPR1协同工作,集成PMT和SA信号,控制口腔关闭和植物免疫力.
- 这项研究揭示了一个新的调节网络,涉及PMT,SA,PMTR1和NPR1在植物防御反应中.
相关概念视频
Regulation of Transpiration by Stomata
29.1K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
29.1K
Cell Signaling in Plants
5.8K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
5.8K
Biological Clocks and Seasonal Responses
38.8K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
38.8K
C4 Pathway and CAM
46.3K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
46.3K
Adaptations that Reduce Water Loss
26.4K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
26.4K
Responses to Salt Stress
13.4K
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.
13.4K


