Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species
<i>Taxus</i> is a rare and endangered woody plant worldwide with important economic and ecological values. However, the weak environmental adaptability of <i>Taxus</i> species, in particular the unstable photosynthetic activity in different seasons, always affects its normal...
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MDPI AG
2023-07-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/14/2636 |
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| author | Tao Wang Lingyu Li Yalong Qin Bo Lu Donghuan Xu Weibing Zhuang Xiaochun Shu Fengjiao Zhang Ning Wang Zhong Wang |
| author_facet | Tao Wang Lingyu Li Yalong Qin Bo Lu Donghuan Xu Weibing Zhuang Xiaochun Shu Fengjiao Zhang Ning Wang Zhong Wang |
| author_sort | Tao Wang |
| collection | DOAJ |
| description | <i>Taxus</i> is a rare and endangered woody plant worldwide with important economic and ecological values. However, the weak environmental adaptability of <i>Taxus</i> species, in particular the unstable photosynthetic activity in different seasons, always affects its normal growth and development and limits its conservation and exploitation. To improve the survival of <i>Taxus</i> trees in cultivated areas, the seasonal dynamics of chlorophyll fluorescence (CF) and key physiological parameters were comprehensively investigated in <i>T. media</i> and <i>T. mairei</i>. The results demonstrated that the photosynthetic activity of both <i>Taxus</i> species was sensitive to local summer and winter environmental conditions, with the heterogeneity of fluorescence signatures intuitively presented on the needle surface by CF-Imaging detection, while images of maximum quantum efficiency of PSII photochemistry (Fv/Fm) demonstrated values below 0.7 in the blue–green sectors in winter. The distribution of light energy was regulated by the photosynthetic apparatus in both <i>Taxus</i> species to maintain a stable actual quantum yield of PSII photochemistry (φPSII), which was around 0.4–0.5. Based on a redundancy discriminant analysis, the interpretation rate of light intensity and air temperature ranked as the top two in both <i>Taxus</i> species, which were considered the main environmental factors affecting the photosynthetic performance of <i>Taxus</i> by disturbing the electron transport chain. In the winter, <i>T. mairei</i> exhibited weaker electron transport activity than <i>T. media</i>, thus caused lower photochemistry and more severe photosynthetic damages. Interestingly, both <i>Taxus</i> species demonstrated consistent response patterns, including diverse energy dissipation strategies and enhancement of osmoregulatory substances and antioxidative activities, thus maintaining stable photosynthetic functions in response to environmental changes. |
| first_indexed | 2024-03-11T00:42:37Z |
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| language | English |
| last_indexed | 2024-03-11T00:42:37Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-0859574f2aae44358bf12727bab26c6e2023-11-18T20:59:52ZengMDPI AGPlants2223-77472023-07-011214263610.3390/plants12142636Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> SpeciesTao Wang0Lingyu Li1Yalong Qin2Bo Lu3Donghuan Xu4Weibing Zhuang5Xiaochun Shu6Fengjiao Zhang7Ning Wang8Zhong Wang9Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaNanjing Athortiland Agricultural Science and Technology Development Co., Ltd., Nanjing 210043, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, ChinaJiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences (Nanjing Botanical Garden Mem. Sun Yat-Sen), Nanjing 210014, China<i>Taxus</i> is a rare and endangered woody plant worldwide with important economic and ecological values. However, the weak environmental adaptability of <i>Taxus</i> species, in particular the unstable photosynthetic activity in different seasons, always affects its normal growth and development and limits its conservation and exploitation. To improve the survival of <i>Taxus</i> trees in cultivated areas, the seasonal dynamics of chlorophyll fluorescence (CF) and key physiological parameters were comprehensively investigated in <i>T. media</i> and <i>T. mairei</i>. The results demonstrated that the photosynthetic activity of both <i>Taxus</i> species was sensitive to local summer and winter environmental conditions, with the heterogeneity of fluorescence signatures intuitively presented on the needle surface by CF-Imaging detection, while images of maximum quantum efficiency of PSII photochemistry (Fv/Fm) demonstrated values below 0.7 in the blue–green sectors in winter. The distribution of light energy was regulated by the photosynthetic apparatus in both <i>Taxus</i> species to maintain a stable actual quantum yield of PSII photochemistry (φPSII), which was around 0.4–0.5. Based on a redundancy discriminant analysis, the interpretation rate of light intensity and air temperature ranked as the top two in both <i>Taxus</i> species, which were considered the main environmental factors affecting the photosynthetic performance of <i>Taxus</i> by disturbing the electron transport chain. In the winter, <i>T. mairei</i> exhibited weaker electron transport activity than <i>T. media</i>, thus caused lower photochemistry and more severe photosynthetic damages. Interestingly, both <i>Taxus</i> species demonstrated consistent response patterns, including diverse energy dissipation strategies and enhancement of osmoregulatory substances and antioxidative activities, thus maintaining stable photosynthetic functions in response to environmental changes.https://www.mdpi.com/2223-7747/12/14/2636chlorophyll <i>a</i> transientchlorophyll fluorescence imagingphotosynthetic responseseasonal dynamics<i>Taxus</i> species |
| spellingShingle | Tao Wang Lingyu Li Yalong Qin Bo Lu Donghuan Xu Weibing Zhuang Xiaochun Shu Fengjiao Zhang Ning Wang Zhong Wang Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species Plants chlorophyll <i>a</i> transient chlorophyll fluorescence imaging photosynthetic response seasonal dynamics <i>Taxus</i> species |
| title | Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species |
| title_full | Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species |
| title_fullStr | Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species |
| title_full_unstemmed | Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species |
| title_short | Effects of Seasonal Changes on Chlorophyll Fluorescence and Physiological Characteristics in the Two <i>Taxus</i> Species |
| title_sort | effects of seasonal changes on chlorophyll fluorescence and physiological characteristics in the two i taxus i species |
| topic | chlorophyll <i>a</i> transient chlorophyll fluorescence imaging photosynthetic response seasonal dynamics <i>Taxus</i> species |
| url | https://www.mdpi.com/2223-7747/12/14/2636 |
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