Abstract
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.
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Acknowledgments
The authors thank Dr. Caiyun Sun and Prof. Mei shi (Shandong University) for their guidance in performing CO2 measurement. We also thank Professor Yang Bai (Chinese Academy of Science) for the selfless help and suggestions in the manuscript editing. This research was financially supported by the Qingdao Leading Technology Innovator Project and by the Shandong University Youth Interdisciplinary Science and Innovative Research Groups (Grant no. 2020QNQT014).
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ZD and HT designed the research. CZ, MZ, and FW conducted the experiments. CZ analyzed the data and wrote the manuscript. XY, SZ, ZY, LZ, HT, and ZD reviewed and edited the manuscript. All authors read and approved the manuscript.
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Zhang, C., Zhang, M., Yan, Z. et al. CO2 is a key constituent of the plant growth-promoting volatiles generated by bacteria in a sealed system. Plant Cell Rep 40, 59–68 (2021). https://doi.org/10.1007/s00299-020-02610-3
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DOI: https://doi.org/10.1007/s00299-020-02610-3