Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis
Photosynthetic efficiency under both steady-state and fluctuating light can significantly affect plant growth under naturally fluctuating light conditions. However, the difference in photosynthetic performance between different rose genotypes is little known. This study compared the photosynthetic p...
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MDPI AG
2023-03-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/5/1186 |
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| author | Xiao-Qian Wang Zhi-Lan Zeng Zi-Ming Shi Ji-Hua Wang Wei Huang |
| author_facet | Xiao-Qian Wang Zhi-Lan Zeng Zi-Ming Shi Ji-Hua Wang Wei Huang |
| author_sort | Xiao-Qian Wang |
| collection | DOAJ |
| description | Photosynthetic efficiency under both steady-state and fluctuating light can significantly affect plant growth under naturally fluctuating light conditions. However, the difference in photosynthetic performance between different rose genotypes is little known. This study compared the photosynthetic performance under steady-state and fluctuating light in two modern rose cultivars (<i>Rose hybrida</i>), “Orange Reeva” and “Gelato”, and an old Chinese rose plant <i>Rosa chinensis</i> cultivar, “Slater’s crimson China”. The light and CO<sub>2</sub> response curves indicated that they showed similar photosynthetic capacity under steady state. The light-saturated steady-state photosynthesis in these three rose genotypes was mainly limited by biochemistry (60%) rather than diffusional conductance. Under fluctuating light conditions (alternated between 100 and 1500 μmol photons m<sup>−2</sup> m<sup>−1</sup> every 5 min), stomatal conductance gradually decreased in these three rose genotypes, while mesophyll conductance (<i>g</i><sub>m</sub>) was maintained stable in Orange Reeva and Gelato but decreased by 23% in <i>R. chinensis</i>, resulting in a stronger loss of CO<sub>2</sub> assimilation under high-light phases in <i>R. chinensis</i> (25%) than in Orange Reeva and Gelato (13%). As a result, the variation in photosynthetic efficiency under fluctuating light among rose cultivars was tightly related to <i>g</i><sub>m</sub>. These results highlight the importance of <i>g</i><sub>m</sub> in dynamic photosynthesis and provide new traits for improving photosynthetic efficiency in rose cultivars. |
| first_indexed | 2024-03-11T07:13:39Z |
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| last_indexed | 2024-03-11T07:13:39Z |
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| spelling | doaj.art-711767f83b1649c286aab3e21ded9d0b2023-11-17T08:25:19ZengMDPI AGPlants2223-77472023-03-01125118610.3390/plants12051186Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic PhotosynthesisXiao-Qian Wang0Zhi-Lan Zeng1Zi-Ming Shi2Ji-Hua Wang3Wei Huang4School of Life Sciences, Northwest University, Xi’an 710069, ChinaKunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, ChinaFlower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming 650205, ChinaFlower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming 650205, ChinaKunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, ChinaPhotosynthetic efficiency under both steady-state and fluctuating light can significantly affect plant growth under naturally fluctuating light conditions. However, the difference in photosynthetic performance between different rose genotypes is little known. This study compared the photosynthetic performance under steady-state and fluctuating light in two modern rose cultivars (<i>Rose hybrida</i>), “Orange Reeva” and “Gelato”, and an old Chinese rose plant <i>Rosa chinensis</i> cultivar, “Slater’s crimson China”. The light and CO<sub>2</sub> response curves indicated that they showed similar photosynthetic capacity under steady state. The light-saturated steady-state photosynthesis in these three rose genotypes was mainly limited by biochemistry (60%) rather than diffusional conductance. Under fluctuating light conditions (alternated between 100 and 1500 μmol photons m<sup>−2</sup> m<sup>−1</sup> every 5 min), stomatal conductance gradually decreased in these three rose genotypes, while mesophyll conductance (<i>g</i><sub>m</sub>) was maintained stable in Orange Reeva and Gelato but decreased by 23% in <i>R. chinensis</i>, resulting in a stronger loss of CO<sub>2</sub> assimilation under high-light phases in <i>R. chinensis</i> (25%) than in Orange Reeva and Gelato (13%). As a result, the variation in photosynthetic efficiency under fluctuating light among rose cultivars was tightly related to <i>g</i><sub>m</sub>. These results highlight the importance of <i>g</i><sub>m</sub> in dynamic photosynthesis and provide new traits for improving photosynthetic efficiency in rose cultivars.https://www.mdpi.com/2223-7747/12/5/1186chlorophyll fluorescenceCO<sub>2</sub> assimilationmesophyll conductancephotosynthetic limitationstomatal conductance |
| spellingShingle | Xiao-Qian Wang Zhi-Lan Zeng Zi-Ming Shi Ji-Hua Wang Wei Huang Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis Plants chlorophyll fluorescence CO<sub>2</sub> assimilation mesophyll conductance photosynthetic limitation stomatal conductance |
| title | Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis |
| title_full | Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis |
| title_fullStr | Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis |
| title_full_unstemmed | Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis |
| title_short | Variation in Photosynthetic Efficiency under Fluctuating Light between <i>Rose Cultivars</i> and its Potential for Improving Dynamic Photosynthesis |
| title_sort | variation in photosynthetic efficiency under fluctuating light between i rose cultivars i and its potential for improving dynamic photosynthesis |
| topic | chlorophyll fluorescence CO<sub>2</sub> assimilation mesophyll conductance photosynthetic limitation stomatal conductance |
| url | https://www.mdpi.com/2223-7747/12/5/1186 |
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