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。

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Wenqing Jin, Elias Kaiser, Yingyue Peng, Yawen Gu, Ep Heuvelink, Leo F M Marcelis
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引用次数: 0

摘要

最近,远红光(FR)在700 - 750海里被报道有类似的光合效率为光合有效辐射(PAR, 400 - 700 nm),当提供结合标准。我们旨在调查如果添加FR PAR同样有效促进光合作用,增加不相上下,如果长期适应FR将改变短期应对FR。莴苣植物生长在气候室两个级别的标准(200年和400年μ摩尔m - 2 s - 1,红/蓝光),并且在每个PAR水平上还添加25% PAR或FR的处理。测定了6个处理中叶片净光合速率(Pn)对不同强度PAR或PAR + FR的响应曲线。在PAR中添加FR增加了Pn,但仅为额外PAR下增加的39%-64%,这是由于FR的吸收低于PAR。吸收的PAR和FR光子具有相似的光合效率。在FR条件下生长的叶片表现出同化反应,如光合能力下降和色素沉着,但瞬时光合反应不受FR影响。FR对生长有较强的正向作用:即使以单位吸收辐射表示,FR部分取代PAR也能提高生长的辐射利用效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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.

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来源期刊
Plant, Cell & Environment
Plant, Cell & Environment 生物-植物科学
CiteScore
13.30
自引率
4.10%
发文量
253
审稿时长
1.8 months
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.
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