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Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

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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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Factors Influencing Microbial Growth: Temperature01:27

Factors Influencing Microbial Growth: Temperature

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Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
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Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Thermoregulation01:26

Thermoregulation

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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Physical Methods for Controlling Microbial Growth: Temperature01:23

Physical Methods for Controlling Microbial Growth: Temperature

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Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
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関連する実験動画

Updated: Dec 14, 2025

Field-Based Thermal Physiology Assay: Cold Shock Recovery under Ambient Conditions
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温度に依存する成長は,長期の寒さ感知に寄与する

Yusheng Zhao1, Rea L Antoniou-Kourounioti1, Grant Calder1,2

  • 1John Innes Centre, Norwich Research Park, Norwich, UK.

Nature
|July 17, 2020
PubMed
まとめ
この要約は機械生成です。

植物は温度に依存した成長によって ゆっくりとしたNTL8タンパク質の蓄積を利用して 冬の進行を感知し VIN3をアップレギュレーションし 季節的な発展を可能にします

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関連する実験動画

Last Updated: Dec 14, 2025

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科学分野:

  • 植物生物学
  • 分子生物学
  • エピジェネティクス

背景:

  • 生物の成長と季節的な発達には 温度が不可欠です
  • 植物は長期にわたる温度変化を解釈し 季節に合わせて成長しなければなりません
  • 植物における長期の温度被曝を統合するメカニズムはほとんど不明です.

研究 の 目的:

  • 植物における長期的な温度感知の基礎となる分子機構を調査する.
  • VERNALIZATION INSENSITIVE 3 (VIN3) のゆっくりとした季節的上昇を制御する要因を特定する.
  • 植物が冬の進行をどのように解釈するかを説明する.

主な方法:

  • VIN3の調節に影響する突然変異を特定するために遺伝子スクリーニングを進めます.
  • 転写因子NTL8とVIN3発現におけるその役割の分析
  • NTL8タンパク質の動態の計算シミュレーションと実験的検証.
  • 温度に依存した成長が タンパク質の希釈に与える影響を調べる

主要な成果:

  • VIN3発現を構成的に活性化する2つの支配的なNTL8変異を特定した.
  • NTL8タンパク質は 寒さの中でゆっくりと蓄積され 直接VIN3をアップレギュレーションします
  • 低温で成長が遅いため,NTL8の稀縮が遅い蓄積の重要な要因であることを示した.
  • 温度に依存した成長が長期の熱感知情報として利用されていることが判明した.

結論:

  • NTL8は植物における長期の温度変化の鍵となる熱センサーとして機能します.
  • 温度に依存した成長によるタンパク質の希釈は,季節感知のためのメカニズムです.
  • このメカニズムは,VIN3のアップレギュレーションと冬の解釈のための長期的な温度情報を提供します.
  • 温度に依存する成長を含む間接的なメカニズムは,生物学的熱感性において広く使用されている可能性があります.