Growth temperature affects O2 consumption rates and plasticity of respiratory flux to support shoot growth at various growth temperatures
Growth temperature affects O2 consumption rates and plasticity of respiratory flux to support shoot growth at various growth temperatures
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DOI：
10.1111/pce.14217
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发表时间：
2021-11-11
影响因子：
7.3
通讯作者：
Noguchi, Ko
中科院分区：
文献类型：
--
作者：
Inoue, Tomomi;Yamada, Yusuke;Noguchi, Ko
呼吸速率的温度依赖性和它们对生长温度的适应在物种/生态型之间变化，但细节仍不清楚。在这里，我们比较了温度依赖性的芽O-2消耗率之间的拟南芥生态型，以澄清如何的温度依赖性和他们的驯化温度不同的生态型，以及这些差异与芽生长。研究了12种不同生态类型的紫穗槐地上部的生长分析、耗氧速率的温度依赖性和呼吸链组分的蛋白质含量。在三种不同的温度下生长。O-2消耗速率的温度依赖性拟合修正的Arrhenius模型。不同生长温度下呼吸激活能对温度的动态响应不同，说明不同生长温度下呼吸通量对温度的可塑性不同。不同生态类型在生长温度下的活化能相似，表明在任何生态类型中，生长温度下的O-2消耗速率都可能由相似的过程决定。这些结果表明，生长温度不仅影响O-2消耗的绝对速率，但也响应于温度的呼吸通量的可塑性，支持新梢生长的驯化，以各种温度。
The temperature dependence of respiration rates and their acclimation to growth temperature vary among species/ecotypes, but the details remain unclear. Here, we compared the temperature dependence of shoot O-2 consumption rates among Arabidopsis thaliana ecotypes to clarify how the temperature dependence and their acclimation to temperature differ among ecotypes, and how these differences relate to shoot growth. We examined growth analysis, temperature dependence of O-2 consumption rates, and protein amounts of the respiratory chain components in shoots of twelve ecotypes of A. thaliana grown at three different temperatures. The temperature dependence of the O-2 consumption rates were fitted to the modified Arrhenius model. The dynamic response of activation energy to measurement temperature was different among growth temperatures, suggesting that the plasticity of respiratory flux to temperatures differs among growth temperatures. The similar values of activation energy at growth temperature among ecotypes suggest that a similar process may determine the O-2 consumption rates at the growth temperature in any ecotype. These results suggest that the growth temperature affects not only the absolute rate of O-2 consumption but also the plasticity of respiratory flux in response to temperature, supporting the acclimation of shoot growth to various temperatures.