Wenqing Jin, Elias Kaiser, Yingyue Peng, Yawen Gu, Ep Heuvelink, Leo F M Marcelis
{"title":"入射远红色光子对叶片光合作用的驱动效率低于PAR光,但对促进生长更有效。","authors":"Wenqing Jin, Elias Kaiser, Yingyue Peng, Yawen Gu, Ep Heuvelink, Leo F M Marcelis","doi":"10.1111/pce.70193","DOIUrl":null,"url":null,"abstract":"<p><p>Recently, far-red light (FR) in the range 700-750 nm has been reported to have similar photosynthetic efficiency as photosynthetically active radiation (PAR, 400-700 nm), when supplied in combination with PAR. We aimed to investigate if adding FR to PAR is equally efficient in promoting photosynthesis as adding PAR, and if long-term acclimation to FR would change the short-term response to FR. Lettuce plants were grown in a climate chamber at two levels of PAR (200 and 400 μmol m<sup>-2</sup> s<sup>-1</sup>, red/blue light), and at each PAR level there were also treatments with 25% of PAR or FR added. In all six treatments, response curves of leaf net photosynthesis rate (P<sub>n</sub>) to different intensities of PAR or PAR + FR were determined. Adding FR to PAR increased P<sub>n</sub>, but this was only 39%-64% of the increase seen under additional PAR, due to lower absorption of FR than PAR. Absorbed PAR and FR photons had similar photosynthetic efficiency. Leaves grown under FR showed acclimatory responses, such as reduced photosynthetic capacity and pigmentation, but the instantaneous photosynthesis response to FR was unaffected. FR had strong positive effects on growth: Partly substituting PAR by FR increased the radiation use efficiency of growth even when expressed per unit of absorbed radiation.</p>","PeriodicalId":222,"journal":{"name":"Plant, Cell & Environment","volume":" ","pages":""},"PeriodicalIF":6.3000,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Incident Far-Red Photons Drive Leaf Photosynthesis Less Efficiently Than PAR Light, but Are More Effective in Promoting Growth.\",\"authors\":\"Wenqing Jin, Elias Kaiser, Yingyue Peng, Yawen Gu, Ep Heuvelink, Leo F M Marcelis\",\"doi\":\"10.1111/pce.70193\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Recently, far-red light (FR) in the range 700-750 nm has been reported to have similar photosynthetic efficiency as photosynthetically active radiation (PAR, 400-700 nm), when supplied in combination with PAR. We aimed to investigate if adding FR to PAR is equally efficient in promoting photosynthesis as adding PAR, and if long-term acclimation to FR would change the short-term response to FR. Lettuce plants were grown in a climate chamber at two levels of PAR (200 and 400 μmol m<sup>-2</sup> s<sup>-1</sup>, red/blue light), and at each PAR level there were also treatments with 25% of PAR or FR added. In all six treatments, response curves of leaf net photosynthesis rate (P<sub>n</sub>) to different intensities of PAR or PAR + FR were determined. Adding FR to PAR increased P<sub>n</sub>, but this was only 39%-64% of the increase seen under additional PAR, due to lower absorption of FR than PAR. Absorbed PAR and FR photons had similar photosynthetic efficiency. Leaves grown under FR showed acclimatory responses, such as reduced photosynthetic capacity and pigmentation, but the instantaneous photosynthesis response to FR was unaffected. FR had strong positive effects on growth: Partly substituting PAR by FR increased the radiation use efficiency of growth even when expressed per unit of absorbed radiation.</p>\",\"PeriodicalId\":222,\"journal\":{\"name\":\"Plant, Cell & Environment\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2025-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Plant, Cell & Environment\",\"FirstCategoryId\":\"2\",\"ListUrlMain\":\"https://doi.org/10.1111/pce.70193\",\"RegionNum\":1,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plant, Cell & Environment","FirstCategoryId":"2","ListUrlMain":"https://doi.org/10.1111/pce.70193","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
Incident Far-Red Photons Drive Leaf Photosynthesis Less Efficiently Than PAR Light, but Are More Effective in Promoting Growth.
Recently, far-red light (FR) in the range 700-750 nm has been reported to have similar photosynthetic efficiency as photosynthetically active radiation (PAR, 400-700 nm), when supplied in combination with PAR. We aimed to investigate if adding FR to PAR is equally efficient in promoting photosynthesis as adding PAR, and if long-term acclimation to FR would change the short-term response to FR. Lettuce plants were grown in a climate chamber at two levels of PAR (200 and 400 μmol m-2 s-1, red/blue light), and at each PAR level there were also treatments with 25% of PAR or FR added. In all six treatments, response curves of leaf net photosynthesis rate (Pn) to different intensities of PAR or PAR + FR were determined. Adding FR to PAR increased Pn, but this was only 39%-64% of the increase seen under additional PAR, due to lower absorption of FR than PAR. Absorbed PAR and FR photons had similar photosynthetic efficiency. Leaves grown under FR showed acclimatory responses, such as reduced photosynthetic capacity and pigmentation, but the instantaneous photosynthesis response to FR was unaffected. FR had strong positive effects on growth: Partly substituting PAR by FR increased the radiation use efficiency of growth even when expressed per unit of absorbed radiation.
期刊介绍:
Plant, Cell & Environment is a premier plant science journal, offering valuable insights into plant responses to their environment. Committed to publishing high-quality theoretical and experimental research, the journal covers a broad spectrum of factors, spanning from molecular to community levels. Researchers exploring various aspects of plant biology, physiology, and ecology contribute to the journal's comprehensive understanding of plant-environment interactions.