Nocturnal plant respiration is under strong non-temperature control.

Nocturnal plant respiration is under strong non-temperature control.
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DOI:
10.1038/s41467-022-33370-1
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发表时间:
2022-09-26
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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大多数生物速率取决于呼吸速率。温度变化通常被认为是每日植物呼吸速率的主要驱动因素,假设在设定温度下每日呼吸速率恒定。在这里,我们展示了来自温带和热带生物群系的31种植物的经验数据,以证明在恒定温度下植物呼吸速率随着时间的推移而单调下降,在黑暗8小时后平均下降25%。温度控制了不到一半的夜间呼吸变化。一个新的通用配方开发的模型和理解夜间植物呼吸,结合夜间减少植物呼吸速率在恒温下的植物呼吸的温度敏感性的减少。新配方的应用表明,目前全球植物呼吸减少4.5 - 6%,净初级生产增加7-10%。植物在夜间的呼吸被认为是温度控制的。在这里,作者表明,温度控制不到一半的夜间叶呼吸速率的变化,并演示了如何在生物圈模型中解释这种夜间变化。
Most biological rates depend on the rate of respiration. Temperature variation is typically considered the main driver of daily plant respiration rates, assuming a constant daily respiration rate at a set temperature. Here, we show empirical data from 31 species from temperate and tropical biomes to demonstrate that the rate of plant respiration at a constant temperature decreases monotonically with time through the night, on average by 25% after 8 h of darkness. Temperature controls less than half of the total nocturnal variation in respiration. A new universal formulation is developed to model and understand nocturnal plant respiration, combining the nocturnal decrease in the rate of plant respiration at constant temperature with the decrease in plant respiration according to the temperature sensitivity. Application of the new formulation shows a global reduction of 4.5 −6 % in plant respiration and an increase of 7-10% in net primary production for the present-day. Plant respiration at night is assumed to be temperature-controlled. Here, the authors show that temperature controls less than half of the variation in leaf respiration rate at night, and demonstrate how to account for such nocturnal variation in biosphere models.
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发表时间: 2016-12-14
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