Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China
Plants have the capacity to fix CO<sub>2</sub> through photosynthesis. To reveal the photosynthetic processes of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i>, their net photosynthetic rates were quantified during the early and peak growing...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/13/12/2010 |
| _version_ | 1797458499950608384 |
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| author | Cunxin Ruan Haibo Hu Can Cheng Pei Fang Xichuan Jia Zhaoming Wu Li Zhu |
| author_facet | Cunxin Ruan Haibo Hu Can Cheng Pei Fang Xichuan Jia Zhaoming Wu Li Zhu |
| author_sort | Cunxin Ruan |
| collection | DOAJ |
| description | Plants have the capacity to fix CO<sub>2</sub> through photosynthesis. To reveal the photosynthetic processes of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i>, their net photosynthetic rates were quantified during the early and peak growing seasons. To evaluate forest photosynthetic efficiencies, the photosynthetic light response curves of <i>Q. acutissima</i> and <i>Q. variabilis</i> were fitted by the rectangular hyperbola model (RHM), non-rectangular hyperbola model (NHM), and modified rectangular hyperbola model (Ye model). The results revealed the following: (1) All daily variation curves of the net photosynthetic rate, stomatal conductivity, and transpiration rate were single-peaked. The peak times of the <i>Q. acutissima</i> and <i>Q. variabilis</i>’ net photosynthetic rates appeared at 12:00 am during the early growing season and 10:00 am during the peak growing season. (2) The photosynthetic capacities of both <i>Q. acutissima</i> and <i>Q. variabilis</i> during peak growing seasons were higher than during the early growing season. (3) The net photosynthetic rate was found to be positively correlated with stomatal conductivity, the transpiration rate, and photosynthetically active radiation, and it was negatively correlated with the intercellular CO<sub>2</sub> concentration. (4) The Ye model provided the best fit for the light response curves of <i>Q. acutissima</i> and <i>Q. variabilis</i> when compared with the rectangular hyperbola and nonrectangular hyperbola models. The photosynthetic performance of <i>Q. acutissima</i> was superior to that of <i>Q. variabilis</i>; thus, it can be employed as a priority tree species in carbon sink forests. |
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| format | Article |
| id | doaj.art-38bdf289341b47269b65dde9ecebfd09 |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-09T16:38:58Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-38bdf289341b47269b65dde9ecebfd092023-11-24T14:53:50ZengMDPI AGForests1999-49072022-11-011312201010.3390/f13122010Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, ChinaCunxin Ruan0Haibo Hu1Can Cheng2Pei Fang3Xichuan Jia4Zhaoming Wu5Li Zhu6Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, ChinaCo-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, ChinaCo-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, ChinaKey Laboratory of Soil and Water Conservation and Ecological Restoration in Jiangsu Province, Nanjing Forestry University, Nanjing 210037, ChinaKey Laboratory of Soil and Water Conservation and Ecological Restoration in Jiangsu Province, Nanjing Forestry University, Nanjing 210037, ChinaWuxi Branch, Bureau of Investigation on Hydrologic Water Resources, Wuxi 214100, ChinaWuxi Branch, Bureau of Investigation on Hydrologic Water Resources, Wuxi 214100, ChinaPlants have the capacity to fix CO<sub>2</sub> through photosynthesis. To reveal the photosynthetic processes of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i>, their net photosynthetic rates were quantified during the early and peak growing seasons. To evaluate forest photosynthetic efficiencies, the photosynthetic light response curves of <i>Q. acutissima</i> and <i>Q. variabilis</i> were fitted by the rectangular hyperbola model (RHM), non-rectangular hyperbola model (NHM), and modified rectangular hyperbola model (Ye model). The results revealed the following: (1) All daily variation curves of the net photosynthetic rate, stomatal conductivity, and transpiration rate were single-peaked. The peak times of the <i>Q. acutissima</i> and <i>Q. variabilis</i>’ net photosynthetic rates appeared at 12:00 am during the early growing season and 10:00 am during the peak growing season. (2) The photosynthetic capacities of both <i>Q. acutissima</i> and <i>Q. variabilis</i> during peak growing seasons were higher than during the early growing season. (3) The net photosynthetic rate was found to be positively correlated with stomatal conductivity, the transpiration rate, and photosynthetically active radiation, and it was negatively correlated with the intercellular CO<sub>2</sub> concentration. (4) The Ye model provided the best fit for the light response curves of <i>Q. acutissima</i> and <i>Q. variabilis</i> when compared with the rectangular hyperbola and nonrectangular hyperbola models. The photosynthetic performance of <i>Q. acutissima</i> was superior to that of <i>Q. variabilis</i>; thus, it can be employed as a priority tree species in carbon sink forests.https://www.mdpi.com/1999-4907/13/12/2010photosynthetic ratephotosynthetic efficiencyphotosynthetic light response model<i>Q. acutissima</i><i>Q. variabilis</i> |
| spellingShingle | Cunxin Ruan Haibo Hu Can Cheng Pei Fang Xichuan Jia Zhaoming Wu Li Zhu Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China Forests photosynthetic rate photosynthetic efficiency photosynthetic light response model <i>Q. acutissima</i> <i>Q. variabilis</i> |
| title | Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China |
| title_full | Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China |
| title_fullStr | Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China |
| title_full_unstemmed | Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China |
| title_short | Photosynthetic Processes and Light Response Model Fitting of <i>Quercus acutissima Carruth.</i> and <i>Quercus variabilis Bl.</i> in the Changjiang River Delta, China |
| title_sort | photosynthetic processes and light response model fitting of i quercus acutissima carruth i and i quercus variabilis bl i in the changjiang river delta china |
| topic | photosynthetic rate photosynthetic efficiency photosynthetic light response model <i>Q. acutissima</i> <i>Q. variabilis</i> |
| url | https://www.mdpi.com/1999-4907/13/12/2010 |
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