叶子在光明和黑暗中呼吸的温度反应是相似的,并由叶子的发育调节
Ding Ming Zheng1, Xuming Wang1,2,3, Qi Liu1
1Key Laboratory for Subtropical Mountain Ecology of the Ministry of Science and Technology and Fujian Province, College of Geographical Sciences, Fujian Normal University, Fuzhou, 350117, China.
The New phytologist
|November 24, 2023
概括
叶子呼吸 叶子呼吸
科学领域:
- 植物生理学 植物生理学
- 生态生态学 生态生态学
- 全球碳循环建模
背景情况:
- 准确预测叶子呼吸的温度反应对于全球碳循环模型至关重要.
- 当前的模型通常假定在光 (RL) 和黑暗 (RDK) 中呼吸的恒定热敏度 (Q10),但它们的相似性是不确定的.
研究的目的:
- 为了调查在光 (RL) 和黑暗 (RDK) 中叶子呼吸的Q10值是否在不同叶子年龄和物种中相似.
- 评估用于估计RL的不同方法及其对Q10计算的影响.
- 了解季节性适应和叶子发育如何影响呼吸的热敏度.
主要方法:
- 在两个常青树种 (Castanopsis carlesii和Ormosia henryi) 的未成熟和成熟叶子中对RL和RDK的短期温度反应进行实地测量.
- 使用Kok,Yin和Kok-iterCc方法估计RL.
- 分析Q10值,RL/RDK比,以及它们与叶子温度,叶子年龄和季节变化的关系.
主要成果:
- 阴和Kok-iterCc方法产生了相似的Q10值 (约. 2.5) 对RL和RDK,而Kok方法高估了Q10和光抑制.
- RL/RDK比率与叶子温度无关.
- 季节性适应导致基底呼吸减少,但Q10并没有减少,这与叶子中的含量有关.
- Q10在成熟的叶子中比不成熟的叶子高出40%.
结论:
- 类似的Q10值可以应用于RL和RDK模型,支持当前的建模方法.
- 叶子发育显著改变Q10,需要考虑叶子年龄在未来的呼吸模型.
- 由于Q10的潜在高估和呼吸的轻度抑制,应谨慎使用Kok方法.
关键词:
科克方法 科克方法Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q10 Q1 Q10 Q10 Q10 Q10 Q10 Q10 Q10碳平衡中的碳平衡.叶绿素的光效应 叶绿素的光全球变暖全球变暖叶子年龄 叶子年龄在光线下叶子呼吸.中粒细胞的导电性.
相关概念视频
02:00Photoreceptors and Plant Responses to Light
20.4K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
20.4K
02:45Responses to Heat and Cold Stress
13.5K
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.
13.5K
02:45Biological Clocks and Seasonal Responses
34.7K
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.
34.7K
02:16Light 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
01:57Adaptations 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
02:04Regulation of Transpiration by Stomata
28.3K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
28.3K