在非生物性压力下,树中Rboh的功能分析和相互作用网络
Jing Wang1, Xiaojiao Liu1, Yude Kang1
1Key Laboratory for Forest Resource Conservation and Utilization in the Southwest Mountains of China (Ministry of Education), College of Forestry, Southwest Forestry University, Kunming, China.
Frontiers in plant science
|March 13, 2025
概括
标识和分析了树呼吸突发氧化酶同类物 (Rbohs),以了解它们在植物应激反应中的作用. 这些Rboh基因显示出增强树物种抗压能力的潜力.
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 生物化学
背景情况:
- 植物呼吸系统爆发氧化酶同类物 (Rbohs) 对于反应性氧物种 (ROS) 生产和应激反应至关重要.
- 树种类中的Rbohs没有很好的特征,这限制了对它们的多样性和功能的理解.
研究的目的:
- 为了识别和描述五种树种的Rboh基因.
- 研究树Rbohs的进化,结构和功能多样性.
- 探索Rbohs在应激反应中的作用及其与依赖的蛋白激酶 (CPKs) 的相互作用.
主要方法:
- 来自五种树种的62个Rboh基因的生物信息分析.
- 对基因结构,物理性质,染色体分布和cis元素的分析.
- 在压力下检测基因表达的定量实时PCR (qRT-PCR).
- 酵母二杂交 (Y2H) 测试以确认蛋白质相互作用.
主要成果:
- 鉴定了62个Rboh基因与保存域,分为四组,显示保存的蛋白质特征和进化模式.
- 发现PyRbohs的染色体分布不均,有基因重复和共同的进化起源的证据.
- 在盐,干旱,PEG和ABA治疗下观察到PyRbohs的上调,并证实了与CPK的相互作用.
结论:
- 树Rbohs表现出显著的进化,结构和功能多样性.
- 基基因对各种非生物压力有反应,并与CPK相互作用,这表明它在ROS生产中起着调节作用.
- 这些发现提供了对Rboh介导的压力反应的见解,并确定了改善树应激耐受性的候选基因.
相关概念视频
02:41Responses to Drought and Flooding
10.6K
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.
10.6K
01:57Adaptations 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
01:46The Calvin Benson Cycle
4.4K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.4K
02:12Short-distance Transport of Resources
15.6K
Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
15.6K
01:25Cell Signaling in Plants
5.6K
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...
5.6K
02:04Regulation of Transpiration by Stomata
27.7K
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.
27.7K