相关实验视频
Updated: Sep 20, 2025

11:09
Relating Stomatal Conductance to Leaf Functional Traits
Published on: October 12, 2015
19.2K
对木质植物的叶子衰老调节的机制性见解:从分子角度来看
Ruxue Zhang1, Murao Zhang1, Shuya Tan1
1State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China.
Tree physiology
|November 22, 2024
概括
叶子衰老,植物的自然衰老过程,对于营养再分配和植物发育至关重要. 这篇评论探讨了木质植物叶子衰老的分子调节,整合了各种因素,以更好地理解.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 生态生态学 生态生态学
背景情况:
- 叶子衰老是植物的重要发育过程,对于营养重新调动和支持持续生长至关重要.
- 这种衰老现象受到严格控制,过早或错时衰老会对植物发育,作物产量和质量产生负面影响.
- 在压力下加速衰老可能代表植物在恶劣环境中生存的进化适应.
研究的目的:
- 审查叶子衰老的分子调节,特别是在木质植物中.
- 阐明复杂的决定因素的相互作用,包括植物激素,环境线索和遗传因素,控制叶子衰老.
- 突出最近的进展,并整合多学科方法和先进技术的见解.
主要方法:
- 文献综述专注于树木物种叶子衰老的分子机制.
- 整合来自遗传,生理和环境研究的数据.
- 综合来自多学科研究和尖端技术的发现.
主要成果:
- 叶子衰老是一个高度调节的过程,受荷尔蒙信号,环境刺激和遗传成分的影响.
- 了解木质植物衰老的分子基础对于农业和生态应用至关重要.
- 最近的研究提供了对基因和分子通路的更深入的洞察,这些通路控制着衰老的时间和进展.
结论:
- 树木植物中叶子衰老的分子调节是复杂的,涉及内部和外部因素之间的复杂相互作用.
- 需要进一步的研究,整合不同的方法,以充分揭示叶子衰老的机制和影响.
- 这一综述巩固了当前的知识,为未来对植物衰老和应激反应的研究提供了基础.
相关概念视频
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
Regulation of Transpiration by Stomata
29.2K
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.
29.2K
Primary and Secondary Growth in Roots and Shoots
58.2K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
58.2K
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
Gene Regulation During Sporulation
88
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...
88
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

