相关实验视频

Updated: Jul 26, 2025

Forced Flowering in Mandarin Trees under Phytotron Conditions

Forced Flowering in Mandarin Trees under Phytotron Conditions

Published on: March 6, 2019

花期对地热加热的不适应性塑料反应

Johan Ehrlén^1,2, Alicia Valdés^1,2, Vigdís F Helmutsdóttir³

¹Department of Ecology, Environment and Plant Sciences, Stockholm University, Stockholm, Sweden.

|June 13, 2023

概括

在开花期间的表型可塑性在环境暗示发生变化时可能会变得不适应. 在地热地区,温暖的土壤可能会导致塑料开花反应不理想,有利于延迟开花.

科学领域:

生态生态学生态生态学
进化生物学进化生物学
植物科学植物科学

背景情况:

现型可塑性允许生物体根据环境变化调整特征.
在季节性环境中,塑料对温度线索的反应,如春季温度,优化繁殖时间.
地热生态系统具有独特的条件,土壤温度与空气温度脱,可能改变可塑性的适应性值.

研究的目的:

研究自然选择如何影响开花时间的可塑性,以应对地热生态系统中的土壤温度梯度.
测试选择有利于在温暖的土壤中晚些时候开花的假设,在温暖的土壤中,塑料反应可能是不适应的.
了解改变环境线索对植物繁殖策略的生态和进化影响.

主要方法:

沿着自然地热变暖梯度进行多年生Cerastium fontanum的观测研究.
记录与不同地点的土壤温度相关的第一次开花日期 (FFD).
分析FFD在两个连续研究年根据土壤温度的选择压力.

主要成果:

第一次开花日 (FFD) 显示了塑料对土壤温度的反应,在温暖的土壤中观察到更早的开花.
在这两年中的一年,选择有利于在寒冷的土壤中早些时候开花,但在温暖的土壤中晚些时候开花.
在温暖的土壤上观察到的FFD的塑料增长在某些年份可能是不适应的.

结论:

地热生态系统作为有价值的自然实验来研究适应快速变化的环境.
在稳定的环境中演变的塑料反应可能在新条件下变得不适应,例如在地热加热地区发现的.
了解塑性选择对于预测物种对持续气候变暖的反应至关重要.

关键词:

气候变化气候变化地热生态系统的地热生态系统微观气候微观气候是一种微观气候.现型性可塑性现型性可塑性现型选择现型选择植物现象学植物现象学

更多相关视频

Geomagnetic Field Gmf and Plant Evolution: Investigating the Effects of Gmf Reversal on Arabidopsis thaliana Development and Gene Expression

Geomagnetic Field Gmf and Plant Evolution: Investigating the Effects of Gmf Reversal on Arabidopsis thaliana Development and Gene Expression

Published on: November 30, 2015

Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus

Identification of Novel Regulators of Plant Transpiration by Large-Scale Thermal Imaging Screening in Helianthus Annuus

Published on: January 30, 2020

相关概念视频

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

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.

Biological Clocks and Seasonal Responses

Biological Clocks and Seasonal Responses

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.

Responses to Drought and Flooding

Responses to Drought and Flooding

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.

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

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.

Responses to Salt Stress

Responses to Salt Stress

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.

Transcription

Transcription

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...