间隔表达CUP-SHAPED COTYLEDON2和REDUCEED COMPLEXITY形状的卡达明hirsuta复杂的叶形状的交叉表达
Neha Bhatia1, David Wilson-Sánchez1, Sören Strauss1
1Department of Comparative Development and Genetics, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829 Cologne, Germany.
Current biology : CB
|July 15, 2023
概括
两个增长抑制剂,降低复杂性 (RCO) 和杯状COTYLEDON2 (CUC2),协调形成复杂的叶子发育在Cardamine hirsuta. 它们独特的空间模式调节了叶片的形成和器官生成.
科学领域:
- 发育生物学是发展生物学.
- 植物器官生成 植物器官生成
- 遗传学 是一个遗传学.
背景情况:
- 了解遗传调节如何驱动器官的形成,在发育生物学中至关重要.
- 复杂的叶子结构,如Cardamine hirsuta中的那些,为研究器官生成提供了一个模型.
- 已知有两个关键的增长抑制转录因子,即降低复杂性 (RCO) 和杯状Cotyledon2 (CUC2),都参与了小册子的开发.
研究的目的:
- 研究RCO和CUC2动作在产生复杂的叶形状时的空间和时间整合.
- 阐明这些增长抑制剂协调小叶子细分和器官生成的机制.
主要方法:
- 利用实时成像技术观察基因表达模式.
- 采用了基因扰动和时间间隔成像技术.
- 进行细胞生长量化,并生成遗传马赛克.
主要成果:
- 在叶片边缘沿着RCO和CUC2的间隔,条纹的表达模式被发现.
- 证明异胎性RCO表达破坏了基于auxin的模式和小册子的形成.
- 显示RCO介导的增长抑制发生在模式形成后,自主抑制细胞增殖,与CUC2在增殖细胞中的作用不同.
结论:
- RCO和CUC2协调以将叶原生分为叶片,产生复杂的叶形态.
- 这项研究揭示了RCO和CUC2抑制生长的独特机制.
- 在机体生成的模式化和后模式化阶段,生长抑制和细胞增殖之间存在不同的关系.
相关概念视频
Introduction to Seed Plants
62.4K
Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
62.4K
Adaptations that Reduce Water Loss
25.8K
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.
25.8K
Light Acquisition
8.5K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.5K
Seed Structure and Early Development of the Sporophyte
28.5K
Seed structures are composed of a protective seed coat surrounding a plant embryo, and a food store for the developing embryo. The embryo contains the precursor tissues for leaves, stem, and roots. The endosperm and cotyledons—seed leaves—act as the food reserves for the growing embryo.
28.5K
Morphogenesis
28.4K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
28.4K
C4 Pathway and CAM
45.7K
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...
45.7K


