Key message

Plant growth is greatly inhibited in tightly sealed Petri dishes for lack of CO ₂ . Bacteria which co-cultured with plant can produce CO ₂ to promote plant growth in sealed systems.

Abstract

Bacteria produce a wide variety of volatiles, some of which can support and others can damage plant growth. It is a controversial issue whether CO₂ or other bacterial volatile compounds promote plant growth in sealed systems. CO₂ is critical for photosynthesis. Here, we show that CO₂ is a key constituent of the plant growth-promoting volatiles generated by bacteria in a sealed system. We revealed that the growth of Arabidopsis seedlings in an airtight container was retarded due to insufficient supply of the CO₂. When either CO₂ was introduced into the container, or the seedlings were co-cultured along with certain bacterial species, the plants’ growth was restored. Conclusion: The benefit of co-culturing was largely due to the CO₂ generated by respiration of the bacteria.

中文翻译：

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CO 2 是密闭系统中细菌产生的植物促生长挥发物的关键成分

关键信息

_{由于缺乏 CO 2}，​​在密封的培养皿中植物的生长受到很大的抑制。与植物共培养的细菌可产生CO ₂以促进植物在密封系统中的生长。

抽象的

细菌会产生各种各样的挥发物，其中一些可以支持植物生长，而另一些可以破坏植物生长。_{CO 2}或其他细菌挥发性化合物是否促进密封系统中的植物生长是一个有争议的问题。CO ₂对光合作用至关重要。在这里，我们表明，CO ₂是密封系统中细菌产生的促进植物生长的挥发物的关键成分。我们发现，由于CO ₂供应不足，拟南芥幼苗在密闭容器中的生长迟缓。当任一 CO ₂将其引入容器中，或将幼苗与某些细菌物种共同培养，植物的生长得以恢复。结论：共培养的好处主要是由于细菌呼吸产生的CO _{2 。}