The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research
Chlorophyll (Chl) fluorescence induction (FI) upon a dark–light transition has been widely analyzed to derive information on initial events of energy conversion and electron transfer in photosystem II (PSII). However, currently, there is no analytical solution to the differential equation of Q<su...
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MDPI AG
2024-02-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/13/3/452 |
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| author | Tongxin Shi Dayong Fan Chengyang Xu Guoming Zheng Chuanfei Zhong Fei Feng Wah Soon Chow |
| author_facet | Tongxin Shi Dayong Fan Chengyang Xu Guoming Zheng Chuanfei Zhong Fei Feng Wah Soon Chow |
| author_sort | Tongxin Shi |
| collection | DOAJ |
| description | Chlorophyll (Chl) fluorescence induction (FI) upon a dark–light transition has been widely analyzed to derive information on initial events of energy conversion and electron transfer in photosystem II (PSII). However, currently, there is no analytical solution to the differential equation of Q<sub>A</sub> reduction kinetics, raising a doubt about the fitting of FI by numerical iteration solution. We derived an analytical solution to fit the OJ phase of FI, thereby yielding estimates of three parameters: the functional absorption cross-section of PSII (<i>σ</i><sub>PSII</sub>), a probability parameter that describes the connectivity among PSII complexes (<i>p</i>), and the rate coefficient for Q<sub>A</sub><sup>−</sup> oxidation (<i>k</i><sub>ox</sub>). We found that <i>σ</i><sub>PSII</sub>, <i>p</i>, and <i>k</i><sub>ox</sub> exhibited dynamic changes during the transition from O to J. We postulated that in high excitation light, some other energy dissipation pathways may vastly outcompete against excitation energy transfer from a closed PSII trap to an open PSII, thereby giving the impression that connectivity seemingly does not exist. We also conducted a case study on the urban heat island effect on the heat stability of PSII using our method and showed that higher-temperature-acclimated leaves had a greater <i>σ</i><sub>PSII</sub>, lower <i>k</i><sub>ox</sub>, and a tendency of lower <i>p</i> towards more shade-type characteristics. |
| first_indexed | 2024-03-08T03:50:23Z |
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| last_indexed | 2024-03-08T03:50:23Z |
| publishDate | 2024-02-01 |
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| series | Plants |
| spelling | doaj.art-08a4f466e50d4fdc972fa4bab0c002242024-02-09T15:20:33ZengMDPI AGPlants2223-77472024-02-0113345210.3390/plants13030452The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island ResearchTongxin Shi0Dayong Fan1Chengyang Xu2Guoming Zheng3Chuanfei Zhong4Fei Feng5Wah Soon Chow6The Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing 100083, ChinaThe Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing 100083, ChinaThe Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing 100083, ChinaYi Zong Qi Technology (Beijing) Co., Ltd., Beijing 100095, ChinaInstitute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, ChinaThe Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing 100083, ChinaDivision of Plant Sciences, Research School of Biology, The Australian National University, Acton, ACT 2601, AustraliaChlorophyll (Chl) fluorescence induction (FI) upon a dark–light transition has been widely analyzed to derive information on initial events of energy conversion and electron transfer in photosystem II (PSII). However, currently, there is no analytical solution to the differential equation of Q<sub>A</sub> reduction kinetics, raising a doubt about the fitting of FI by numerical iteration solution. We derived an analytical solution to fit the OJ phase of FI, thereby yielding estimates of three parameters: the functional absorption cross-section of PSII (<i>σ</i><sub>PSII</sub>), a probability parameter that describes the connectivity among PSII complexes (<i>p</i>), and the rate coefficient for Q<sub>A</sub><sup>−</sup> oxidation (<i>k</i><sub>ox</sub>). We found that <i>σ</i><sub>PSII</sub>, <i>p</i>, and <i>k</i><sub>ox</sub> exhibited dynamic changes during the transition from O to J. We postulated that in high excitation light, some other energy dissipation pathways may vastly outcompete against excitation energy transfer from a closed PSII trap to an open PSII, thereby giving the impression that connectivity seemingly does not exist. We also conducted a case study on the urban heat island effect on the heat stability of PSII using our method and showed that higher-temperature-acclimated leaves had a greater <i>σ</i><sub>PSII</sub>, lower <i>k</i><sub>ox</sub>, and a tendency of lower <i>p</i> towards more shade-type characteristics.https://www.mdpi.com/2223-7747/13/3/452connectivity among PSII complexesdifferential equation of Q<sub>A</sub> reduction kineticsfunctional absorption cross-section of PSIIheat stability of PSIIUHI |
| spellingShingle | Tongxin Shi Dayong Fan Chengyang Xu Guoming Zheng Chuanfei Zhong Fei Feng Wah Soon Chow The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research Plants connectivity among PSII complexes differential equation of Q<sub>A</sub> reduction kinetics functional absorption cross-section of PSII heat stability of PSII UHI |
| title | The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research |
| title_full | The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research |
| title_fullStr | The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research |
| title_full_unstemmed | The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research |
| title_short | The Fitting of the OJ Phase of Chlorophyll Fluorescence Induction Based on an Analytical Solution and Its Application in Urban Heat Island Research |
| title_sort | fitting of the oj phase of chlorophyll fluorescence induction based on an analytical solution and its application in urban heat island research |
| topic | connectivity among PSII complexes differential equation of Q<sub>A</sub> reduction kinetics functional absorption cross-section of PSII heat stability of PSII UHI |
| url | https://www.mdpi.com/2223-7747/13/3/452 |
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