叶子液压效率和安全性之间的权衡在三个异花植物物种之间,以应对增加的岩石碎片含量
Xiulong Zhang1, Shaowei Ma1,2, Hui Hu1,2
1CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4 South Renmin Road, Wuhou District, Chengdu, Sichuan 610041, China.
Tree physiology
|January 20, 2024
概括
在岩石土壤中的菌植物显示叶子的液压导电性降低,并且具有更高的岩石碎片含量 (RFC) 的安全性增加. 这种适应涉及水力效率和安全之间的权衡,这对于在石质环境中生存至关重要.
科学领域:
- 植物生理学 植物生理学
- 生态生态学 生态生态学
- 植物学 植物学
背景情况:
- 关于土壤岩石碎片含量 (RFC) 如何影响植物叶液压特征的数据有限,特别是在来自岩石山区的异花植物中.
- 克塞罗菲特适应干旱条件,在高RFC的环境中面临独特的挑战.
研究的目的:
- 为了研究不同RFC梯度下的三种异植物物种叶子液压特征的变化.
- 了解水力效率和安全之间的权衡,以应对不断增加的岩石性.
主要方法:
- 在Sophora davidii,Cotinus szechuanensis和Bauhinia brachycarpa上进行了四个RFC水平 (0-75%) 的实地实验.
- 叶子水电位 (Ψleaf),叶子液压导电率 (Kleaf),P50,压力体积特征和叶子结构的测量.
- 分析RFC如何影响这些液压和结构特征.
主要成果:
- 增加的RFC持续降低了Kleaf,并使P50和流损失点 (Ψtlp) 在所有物种中变得更为负面.
- 液压效率和安全之间的权衡是显而易见的,随着RFC的增加.
- 减少Klef与增加每面积的叶子质量相关;具体驱动因素 (VLA, Ψtlp) 根据物种而异.
结论:
- 适应岩石土壤需要在叶子液压效率和异花植物的安全性之间进行权衡.
- 这种权衡受西和外部-西通路的影响.
- 这些发现有助于更好地理解石质基板中的异构体生存策略.
相关概念视频
Adaptations that Reduce Water Loss
25.6K
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.
25.6K
Responses to Drought and Flooding
10.7K
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.
10.7K
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
Xylem and Transpiration-driven Transport of Resources
23.9K
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.
23.9K
Energy Budgets
9.2K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
9.2K
Responses to Salt Stress
13.1K
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.
13.1K


