在全球变暖的背景下,温度对树木昼夜钟的作用的影响
Maximiliano Estravis-Barcala1, Sofía Gaischuk1, Marina Gonzalez-Polo2
1Instituto de Investigaciones Forestales y Agropecuarias Bariloche, Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Bariloche - Consejo Nacional de Investigaciones Científicas y Técnicas (INTA EEA Bariloche-CONICET), San Carlos de Bariloche, Río Negro, R8403DVZ, Argentina.
The New phytologist
|January 8, 2025
概括
植物的昼夜钟有助于树木适应变暖. 一种物种与温度变化作斗争,显示生存率降低,与适应温暖气候的相关物种不同.
科学领域:
- 植物生态生理学植物生态生理学
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 在一个变暖的世界里,植物的生存取决于生物过程适应环境变化.
- 昼夜振荡器对于热适应和可塑性至关重要,但它们在自然生态系统的温度变化下的表现尚不清楚.
研究的目的:
- 在两个相关的巴塔哥尼亚树种中研究温度对昼夜钟功能的影响.
- 确定昼夜表的表现,热,在变暖的环境中种植苗的可塑性之间的联系.
主要方法:
- 结合生物信息学,分子生物学和生态生理学.
- 进行了转录组分析和高度交换实验.
- 在不同温度下评估昼夜时钟功能,生存和生长.
主要成果:
- 在高温下,Nothofagus pumilio (寒冷气候物种) 呈现出显著的转录组变化和节律性降低.
- 在热应激下,Nothofagus obliqua (温暖气候物种) 保持了更好的时钟功能.
- N. pumilio 显示振荡器功能受损,存活率降低,在温暖的地区增长.
结论:
- 温度对昼夜时钟的影响的跨种类差异与热相关.
- 循环时钟的表现会影响幼苗的热可塑性和生态适应变暖.
- 一个共振振荡器可能在植物适应气候变化方面发挥关键作用.
相关概念视频
Biological Clocks and Seasonal Responses
34.6K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.6K
Factors Affecting Body Temperature
3.8K
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
3.8K
Responses to Heat and Cold Stress
13.3K
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.
13.3K
Circadian Rhythms and Gene Regulation
4.0K
The biological clock is involved in many aspects of regulating complex physiology in all animals. It was in 1935 when German zoologists, Hans Kalmus and Erwin Bünning, discovered the existence of circadian rhythm in Drosophila melanogaster. However, the internal molecular mechanisms behind the circadian clock remained a mystery until 1984, when Jeffrey C. Hall, Michael Rosbash, and Michael W. Young discovered the expression of the Per gene oscillating over a 24-hour cycle. In subsequent...
4.0K
Global Climate Change
24.2K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.2K
Transcription
146.6K
Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
146.6K


