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Changes of photosynthetic capacity of some plant species under very high CO_2 concentrations in Biosphere 2

机译：高浓度CO_2对生物圈2中某些植物光合能力的影响

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THE responses of plant photosynthesis to elevated CO_2 could be divided into short-term response and long-term response or acclimation. In the short-term response, photosynthesis can be enhanced at the beginning of high CO_2 treatment for most C_3 carbon fixation species, but the photosynthetic rate may decrease when the plants are exposed to that high CO_2 for a long period. Such a phenomenon can be explained as that the enhancement may be restricted by some environmental factors, such as light, temperature, water, nutrient, and even the growth rooms for plants . Long-term response or acclimation studies, on the other hand, enable plants to have enough time to get acclimated to the changed CO_2 environment, thus providing an ideal method for predicting the capacity changes in photosynthesis or other important ecophysiological features. But in most of the present studies, the growth rooms for plants are still restricted , and most treatments are only suitable for seedlings, but not for tall and bigspecies, especially trees.
机译：植物光合作用对CO_2升高的响应可分为短期响应和长期响应或适应。在短期响应中，对于大多数C_3碳固定物种而言，在高CO_2处理开始时，光合作用就可以增强，但是当植物长时间暴露于高CO_2条件下时，光合速率可能会降低。可以解释这种现象，因为增强可能受到某些环境因素的限制，例如光，温度，水，养分，甚至植物的生长室。另一方面，长期的响应或适应研究使植物有足够的时间适应变化的CO_2环境，从而为预测光合作用或其他重要生态生理特征的能力变化提供了理想的方法。但是在目前的大多数研究中，植物的生长室仍然受到限制，大多数处理方法仅适用于幼苗，不适用于高大物种，尤其是树木。

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