调节 JA-GA 信号和干旱响应,通过米中截断的 OsJAZ9 蛋白调节
1Department of Crop Science and Biotechnology, Dankook University, Cheonan, Republic of Korea.
Plant signaling & behavior
|November 27, 2025
概括
改变米的OsJAZ9蛋白质结构可以通过调节素酸 (JA) 和甲酸 (GA) 信号通路来提高植物的高度和耐旱性. 这种基因改造为提高作物弹性提供了一个有希望的工具.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 植物的生长和应激反应由植物激素雅斯蒙酸 (JA) 和吉布雷利酸 (GA) 调节.
- JA和GA通路之间的对抗性交叉涉及像JASMONATE ZIM-DOMAIN PROTEIN (JAZ) 和DELLA蛋白质这样的抑制剂.
- 在大米 (Oryza sativa) 中,OsJAZ9和DELLA蛋白SLENDER RICE 1 (SLR1) 是JA-GA信号对抗的关键参与者.
研究的目的:
- 研究一个截断的OsJAZ9蛋白 (缺少C端的Jas域) 对JA-GA信号和植物表型的影响.
- 为了确定过度表达这种修饰的OsJAZ9 (OsJAZ9NZ-OE) 是否会影响植物生长和承受压力.
- 为了探索在大米中由OsJAZ9NZ-OE诱导的转录变化.
主要方法:
- 产生的转基因大米线过度表达了一个截断的OsJAZ9 (OsJAZ9NZ-OE).
- 在OsJAZ9NZ-OE线上进行表型评估的植物高度和干旱应激恢复.
- 通过转录组分析分析了JA和GA相关基因的表达.
主要成果:
- OsJAZ9NZ-OE植物表现出增加的植物高度和在干旱压力下增强的恢复.
- 观察到JA相关基因 (OsbHLH148,OsMYC2),ABA/压力相关基因 (OsWRKY71) 和GA相关的转录因子 (OsPIL14,OsPIL15) 的升级.
- 结果表明,OsJAZ9NZ影响广泛的激素反应通路,协调生长和压力.
结论:
- OsJAZ9的结构修改改变了大米中的JA-GA信号平衡.
- 这种改变导致转录重编程,影响植物生长和耐旱性.
- OsJAZ9NZ是研究激素交叉的宝贵工具,也是提高作物的潜在资源.
更多相关视频
11:27A Flexible Low Cost Hydroponic System for Assessing Plant Responses to Small Molecules in Sterile Conditions
Published on: August 25, 2018
11.3K
07:43Agrobacterium-Mediated Genetic Transformation, Transgenic Production, and Its Application for the Study of Male Reproductive Development in Rice
Published on: October 6, 2020
13.2K
相关概念视频
Responses to Drought and Flooding
11.9K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.9K
Regulation of Transpiration by Stomata
30.8K
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.
30.8K
Cell Signaling in Plants
6.1K
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...
6.1K
Adaptations that Reduce Water Loss
27.8K
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.
27.8K
Gene Regulation During Sporulation
408
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
408
Responses to Salt Stress
14.4K
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.
14.4K
