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相关概念视频

Plastic Behavior01:21

Plastic Behavior

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A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
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Plasticity is the property where an object loses its elasticity and undergoes irreversible deformation, even after the deformation forces are eliminated. If a material deforms irreversibly without increasing stress or load, then this is called ideal plasticity. For example, when a force is applied to an aluminum rod, it changes its shape, but it does not return to its original shape once the force is removed. Plastic deformation or ductility is thus a permanent deformation or change in the...
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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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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.
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Elasticity is the ability of an object to withstand the effects of distortion and to return to its original size and shape once the forces causing deformation are removed. When an elastic material deforms under the action of an external force, it experiences internal resistance to the deformation. However, if no external force is applied, it returns to its original state.
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An Optimized Rhizobox Protocol to Visualize Root Growth and Responsiveness to Localized Nutrients
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根的可塑性与弹性 - - 什么时候反应是适应性的?

Tino Colombi1, Bipin K Pandey2, Aakash Chawade3

  • 1Department of Soil and Environment, Swedish University of Agricultural Sciences, P.O. Box 7014, 75007, Uppsala, Sweden.

Trends in plant science
|February 14, 2024
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概括

了解根部适应不同土壤条件是作物生长的关键. 这项研究引入了一个框架来评估根的可塑性和弹性,揭示可塑性在重复的土壤压力下提供更大的好处.

关键词:
生物能源生物能源学现型的适应 现型的适应根土的相互作用.土壤异质性 土壤异质性

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科学领域:

  • 植物生理学 植物生理学
  • 土壤科学 土壤科学
  • 农业学是一种农业学.

背景情况:

  • 空间时空土壤异质性会产生影响作物生长的地压力循环.
  • 根对这些异质土壤条件的反应的适应价值需要进一步研究.

研究的目的:

  • 建立一个框架来评估根对土壤异质性的反应的适应价值.
  • 在根中区分持久性 (可塑性) 和可逆性 (可弹性) 应激反应.

主要方法:

  • 使用能量平衡原则进行理论评估.
  • 根据压力下的持久性和可逆性来区分根反应.

主要成果:

  • 在根反应中,可塑性对弹性的理论优势随着性应激周期的频率增加而增加.
  • 从根反应中获得的高能量增加进一步增强了可塑性的好处.

结论:

  • 拟议的框架为评估在异质土壤中根性行为的适应意义提供了一个概念基础.
  • 这项研究可以刺激进一步研究作物适应策略,以挑战地下环境.