一氧化碳是密封系统中细菌产生的促进植物生长的挥发性物质的关键成分。
CO is a key constituent of the plant growth-promoting volatiles generated by bacteria in a sealed system.
作者信息
Zhang Chunlei, Zhang Mengyue, Yan Zhenwei, Wang Fengxia, Yuan Xianzheng, Zhao Shan, Zhang Lei, Tian Huiyu, Ding Zhaojun
机构信息
The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, College of Life Sciences, Shandong University, Qingdao, 266237, Shandong, China.
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, Shandong, China.
出版信息
Plant Cell Rep. 2021 Jan;40(1):59-68. doi: 10.1007/s00299-020-02610-3. Epub 2020 Oct 3.
KEY MESSAGE
Plant growth is greatly inhibited in tightly sealed Petri dishes for lack of CO. Bacteria which co-cultured with plant can produce CO to promote plant growth in sealed systems. Bacteria produce a wide variety of volatiles, some of which can support and others can damage plant growth. It is a controversial issue whether CO or other bacterial volatile compounds promote plant growth in sealed systems. CO is critical for photosynthesis. Here, we show that CO 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 CO. When either CO 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 CO generated by respiration of the bacteria.
关键信息
由于缺乏一氧化碳，植物生长在密封的培养皿中受到极大抑制。与植物共培养的细菌能产生一氧化碳，从而在密封系统中促进植物生长。细菌会产生多种挥发性物质，其中一些能促进植物生长，而另一些则会损害植物生长。在密封系统中，一氧化碳或其他细菌挥发性化合物是否能促进植物生长是一个有争议的问题。一氧化碳对光合作用至关重要。在此，我们表明一氧化碳是细菌在密封系统中产生的促进植物生长的挥发性物质的关键成分。我们发现，由于一氧化碳供应不足，拟南芥幼苗在密闭容器中的生长受到阻碍。当向容器中引入一氧化碳，或者将幼苗与某些细菌物种共培养时，植物的生长得以恢复。
结论
共培养的益处很大程度上归因于细菌呼吸产生的一氧化碳。
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