Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential
Tillering and yield are linked in rice, with significant efforts being invested to understand the genetic basis of this phenomenon. However, in addition to genetic factors, tillering is also influenced by the environment. Exploiting experiments in which seedlings were first grown in elevated CO2 (eC...
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Springer Science and Business Media
2023
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my.upm.eprints.1076482024-09-12T04:00:24Z http://psasir.upm.edu.my/id/eprint/107648/ Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential Sloan, Jennifer M. Muhamad Mujab, Azzami Adam Mashitah, Jusoh Zulkarami, Berahim Wilson, Matthew J. Toh, Liang Su Nur Zahirah, A. Jalil Afiq, Kamaruzali Asyraf, Ahmad Tajuddin Zhu, Xin-Guang Yaapar, Nazmin Fleming, Andrew J. Tillering and yield are linked in rice, with significant efforts being invested to understand the genetic basis of this phenomenon. However, in addition to genetic factors, tillering is also influenced by the environment. Exploiting experiments in which seedlings were first grown in elevated CO2 (eCO2) before transfer and further growth under ambient CO2 (aCO2) levels, we found that even moderate exposure times to eCO2 were sufficient to induce tillering in seedlings, which was maintained in plants grown to maturity plants in controlled environment chambers. We then explored whether brief exposure to eCO2 (eCO2 priming) could be implemented to regulate tiller number and yield in the field. We designed a cost-effective growth system, using yeast to increase the CO2 level for the first 24 days of growth, and grew these seedlings to maturity in semi-field conditions in Malaysia. The increased growth caused by eCO2 priming translated into larger mature plants with increased tillering, panicle number, and improved grain filling and 1000 grain weight. In order to make the process more appealing to conventional rice farmers, we then developed a system in which fungal mycelium was used to generate the eCO2 via respiration of sugars derived by growing the fungus on lignocellulosic waste. Not only does this provide a sustainable source of CO2, it also has the added financial benefit to farmers of generating economically valuable oyster mushrooms as an end-product of mycelium growth. Our experiments show that the system is capable of generating sufficient CO2 to induce increased tillering in rice seedlings, leading eventually to 18% more tillers and panicles in mature paddy-grown crop. We discuss the potential of eCO2 priming as a rapidly implementable, broadly applicable and sustainable system to increase tillering, and thus yield potential in rice. Springer Science and Business Media 2023-03-22 Article PeerReviewed Sloan, Jennifer M. and Muhamad Mujab, Azzami Adam and Mashitah, Jusoh and Zulkarami, Berahim and Wilson, Matthew J. and Toh, Liang Su and Nur Zahirah, A. Jalil and Afiq, Kamaruzali and Asyraf, Ahmad Tajuddin and Zhu, Xin-Guang and Yaapar, Nazmin and Fleming, Andrew J. (2023) Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential. Rice, 16 (1). pp. 1-11. ISSN 1939-8425; ESSN: 1939-8433 https://thericejournal.springeropen.com/articles/10.1186/s12284-023-00629-0 10.1186/s12284-023-00629-0 |
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Tillering and yield are linked in rice, with significant efforts being invested to understand the genetic basis of this phenomenon. However, in addition to genetic factors, tillering is also influenced by the environment. Exploiting experiments in which seedlings were first grown in elevated CO2 (eCO2) before transfer and further growth under ambient CO2 (aCO2) levels, we found that even moderate exposure times to eCO2 were sufficient to induce tillering in seedlings, which was maintained in plants grown to maturity plants in controlled environment chambers. We then explored whether brief exposure to eCO2 (eCO2 priming) could be implemented to regulate tiller number and yield in the field. We designed a cost-effective growth system, using yeast to increase the CO2 level for the first 24 days of growth, and grew these seedlings to maturity in semi-field conditions in Malaysia. The increased growth caused by eCO2 priming translated into larger mature plants with increased tillering, panicle number, and improved grain filling and 1000 grain weight. In order to make the process more appealing to conventional rice farmers, we then developed a system in which fungal mycelium was used to generate the eCO2 via respiration of sugars derived by growing the fungus on lignocellulosic waste. Not only does this provide a sustainable source of CO2, it also has the added financial benefit to farmers of generating economically valuable oyster mushrooms as an end-product of mycelium growth. Our experiments show that the system is capable of generating sufficient CO2 to induce increased tillering in rice seedlings, leading eventually to 18% more tillers and panicles in mature paddy-grown crop. We discuss the potential of eCO2 priming as a rapidly implementable, broadly applicable and sustainable system to increase tillering, and thus yield potential in rice. |
| format |
Article |
| author |
Sloan, Jennifer M. Muhamad Mujab, Azzami Adam Mashitah, Jusoh Zulkarami, Berahim Wilson, Matthew J. Toh, Liang Su Nur Zahirah, A. Jalil Afiq, Kamaruzali Asyraf, Ahmad Tajuddin Zhu, Xin-Guang Yaapar, Nazmin Fleming, Andrew J. |
| spellingShingle |
Sloan, Jennifer M. Muhamad Mujab, Azzami Adam Mashitah, Jusoh Zulkarami, Berahim Wilson, Matthew J. Toh, Liang Su Nur Zahirah, A. Jalil Afiq, Kamaruzali Asyraf, Ahmad Tajuddin Zhu, Xin-Guang Yaapar, Nazmin Fleming, Andrew J. Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| author_facet |
Sloan, Jennifer M. Muhamad Mujab, Azzami Adam Mashitah, Jusoh Zulkarami, Berahim Wilson, Matthew J. Toh, Liang Su Nur Zahirah, A. Jalil Afiq, Kamaruzali Asyraf, Ahmad Tajuddin Zhu, Xin-Guang Yaapar, Nazmin Fleming, Andrew J. |
| author_sort |
Sloan, Jennifer M. |
| title |
Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| title_short |
Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| title_full |
Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| title_fullStr |
Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| title_full_unstemmed |
Elevated CO2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| title_sort |
elevated co2 priming as a sustainable approach to increasing rice tiller number and yield potential |
| publisher |
Springer Science and Business Media |
| publishDate |
2023 |
| url |
http://psasir.upm.edu.my/id/eprint/107648/ https://thericejournal.springeropen.com/articles/10.1186/s12284-023-00629-0 |
| _version_ |
1811685964574097408 |
| score |
13.211869 |