问题的根源:在小麦植物的根系中发现的多种类型的易受西腔的脆弱性
Beatrice L Harrison Day1, Kate M Johnson2,3, Vanessa Tonet1
1School of Natural Sciences, University of Tasmania, Private Bag 55, Hobart, TAS, 7001, Australia.
The New phytologist
|June 12, 2023
概括
干旱导致西栓塞从小的外围根向面包小麦的内部扩散. 这种模式可能会牺牲小根来保护大根,影响植物对干旱的反应.
科学领域:
- 植物生理学 植物生理学
- 干旱应激反应 干旱应激反应
- 齐伦体解剖学 齐伦体解剖学
背景情况:
- 体栓塞的传播在地面组织中得到了很好的研究,但在根系中了解得很少.
- 干旱压力对植物的生存和功能产生重大影响,根是与土壤水的主要接口.
研究的目的:
- 为了研究干旱影响的面包小麦完整的根系中西伦栓塞传播的模式.
- 为了确定紫叶树化漏洞是否随着根的大小和根系内的位置而变化.
主要方法:
- 采用光学和X射线成像技术,在干燥条件下可视化在面包小麦 (Triticum aestivum L. "Krichauff") 中扩散的西栓塞.
- 在整个根系中检查了不同根大小和位置的树叶腔漏洞的模式.
主要成果:
- 单个面包小麦植物表现出一致的整个根系对体洞穴的平均脆弱性.
- 在单一植物中的单个根之间观察到洞穴脆弱性的显著变化 (高达6MPa).
- 体栓塞通常始于较小的外围根,并向根结石进展,尽管这种模式表现出很高的可变性.
结论:
- 观察到的栓塞扩散模式表明,在干旱期间牺牲较小,可替换的根,以保持更大,中心根的功能.
- 了解这种地下栓塞传播对于理解干旱对植物的整体影响及其与土壤环境的相互作用至关重要.
更多相关视频
10:26Author Spotlight: Integrating Biochemical Functions of β-Glucanases and Peroxidase Enzymes in Wheat-RWA Interaction
Published on: July 26, 2024
718
11:49Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature
Published on: April 5, 2013
21.1K
相关概念视频
02:41Responses to Drought and Flooding
10.8K
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.
10.8K
01:57Adaptations 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
02:22Introduction to Plant Diversity
45.2K
From Water to Land
45.2K
02:03Xylem and Transpiration-driven Transport of Resources
24.2K
The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.
24.2K
02:34Water and Mineral Acquisition
33.3K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
33.3K
02:02Responses to Salt Stress
13.2K
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.
13.2K