单和双的根生长受到不同的组织的限制
Anna Petrova1, Marina Ageeva2, Liudmila Kozlova1,3
1Laboratory of Plant Cell Growth Mechanisms, Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, 420111, Kazan, Russia.
The Plant journal : for cell and molecular biology
|August 30, 2023
概括
植物根的生长是由细胞壁机制控制的. 皮质微管的定向,而不是矩阵多糖,与细胞壁弹性相关,影响哪些组织限制单和双的根延伸.
科学领域:
- 植物生物学 植物生物学
- 生物物理学的生物物理.
- 发展生物学 发展生物学
背景情况:
- 植物形态发生和生长基本上是由细胞壁的机械特性控制的.
- 了解细胞壁弹性对于破译根部发育和生长动态至关重要.
研究的目的:
- 描述细胞壁弹性的动态在不同的组织和植物根的发育区.
- 为了确定特定的组织,限制根生长的单 (谷物) 和双的物种.
- 探索细胞壁机械特性,矩阵多糖和皮质微管组织之间的关系.
主要方法:
- 原子力显微镜 (AFM) 用于测量细胞壁弹性 (弹性模块).
- 对多种植物种类的发育根进行了分析,重点是美里系统,延伸和晚延伸区域.
- 进行了对矩阵多糖的免疫标记和对皮质微管异性质的评估.
主要成果:
- 在所有物种中,延长生长区的细胞壁表现出相对于全系统或晚延长区的弹性降低.
- 在发育区内的不同组织中观察到细胞壁弹性的显著变化.
- 在谷物中,内皮质主要限制了根的生长,而在双叶植物中,根皮和外皮质是限制生长的组织.
- 皮层微管异质性与细胞壁弹性有很强的相关性,而矩阵多糖化合物组成没有预测机械性质.
结论:
- 单叶植物和二叶植物的根形态发生依赖于不同的生长限制组织,影响分子事件的局部化.
- 皮层微管组织是细胞壁机械性质的关键决定因素,因此,根生长.
- 未来的研究应该在植物发育研究中考虑组织特异性机械特性和微管动力学.
相关概念视频
03:40Introduction to Seed Plants
62.2K
Most plants are seed plants—characterized by seeds, pollen, and reduced gametophytes. Seed plants include gymnosperms and angiosperms.
62.2K
03:02Primary and Secondary Growth in Roots and Shoots
57.4K
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.
57.4K
02:36Meristems and Plant Growth
46.1K
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
46.1K
01:18Plant Tissues
6.5K
Plants are multicellular eukaryotes with tissue systems made of various cell types that carry out specific functions. Different tissues work together to perform a unique function and form an organ. Organs working together form organ systems. Vascular plants have two distinct organ systems: a shoot system and a root system. The shoot system consists of two portions: the vegetative (non-reproductive) parts of the plant, such as the leaves and the stems, and the reproductive parts of the plant,...
6.5K
02:01Plant Cells and Tissues
61.4K
Plant tissues are collections of similar cells performing related functions. Different plant tissues will have their own specialized roles and can be combined with other tissues to form organs such as flowers, fruit, stem, and leaves. Two major types of plant tissue include meristematic and permanent tissue.
61.4K
02:27Basic Plant Anatomy: Roots, Stems, and Leaves
59.3K
The primary organs of vascular plants are roots, stems, and leaves, but these structures can be highly variable, adapted for the specific needs and environment of different plant species.
59.3K