氧化介于酸盐诱导的减轻黄瓜中水浸压力的缓解
Neda Hesari1, Iman Mirmazloum2, Katalin Jäger3
1Department of Plant Physiology and Plant Ecology, Institute of Agronomy, Hungarian University of Agriculture and Life Sciences, Budapest, Hungary.
Scientific reports
|May 1, 2025
概括
酸盐通过触发氧化 (NO) 生产,改善根功能和恢复芽生长来缓解黄瓜的水浸压力. 这提高了植物对低氧条件的弹性.
科学领域:
- 植物生理学 植物生理学
- 环境压力生物学
- 农业科学 农业科学
背景情况:
- 浸水压力 (WL) 诱导植物的无氧代谢,氧化压力和生长迟缓.
- 酸盐 (NO3-) 是一个关键的营养素,但其在减轻WL压力的作用尚未完全理解.
- 黄瓜 (Cucumis sativus) 是一种商业上重要的作物,易受水浸.
研究的目的:
- 研究WL压力对黄瓜生长和新陈代谢的影响.
- 为了确定酸盐 (NO3-) 在减轻黄瓜中WL压力的作用.
- 阐明以酸盐为媒介的减轻压力的潜在机制,重点关注氧化 (NO).
主要方法:
- 黄瓜混合动力线路经历了WL压力,有或没有酸盐补充.
- 基因表达分析 (RT-qPCR) 用于研究缺氧和酸盐载体基因.
- 生物化学分析测量了反应性氧物种 (ROS),蛋白质化和酸盐含量.
- 光显微镜可视化了氧化 (NO) 的积累.
- 用药学抑制NO (cPTIO) 来证实NO的作用.
主要成果:
- WL压力诱导了无氧代谢,偶然根 (AR) 形成,氧化应激,以及黄瓜中酸盐水平的降低.
- 酸盐补充恢复了芽生长,减少了氧化应激,并增加了酸盐水平.
- 酸盐治疗增强了根部NO的积累,并且NO被发现对减轻压力至关重要.
- 氧化 (NO) 在WL压力下调解了酸盐转运基因 (NRT1) 的诱导.
- 酸盐通过改善根功能,减少发酵代谢和促进AR形成来减轻WL压力,而NO起着中心作用.
结论:
- 酸盐通过依赖于氧化 (NO) 的途径有效地减轻黄瓜中的浸水压力.
- 改善根功能,包括提高酸盐的吸收和运输,有助于减轻压力.
- 在低氧条件下,酸盐触发的NO信号对于调节酸盐载体的基因表达至关重要.
- 这项研究揭示了一种新的机制,用于增强作物对水浸压力的抵抗力.
相关概念视频
Responses to Drought and Flooding
10.5K
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.
10.5K
Nitric Oxide Signaling Pathway
4.8K
Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
4.8K
Key Elements for Plant Nutrition
18.5K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
18.5K
Adaptations that Reduce Water Loss
25.0K
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.
25.0K
Responses to Salt Stress
12.8K
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.
12.8K
Antihypertensive Drugs: Vasodilators
426
Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
426


