Interaction between the spectral photon flux density distributions of light during growth and for measurements in net photosynthetic rates of cucumber leaves
Interaction between the spectral photon flux density distributions of light during growth and for measurements in net photosynthetic rates of cucumber leaves
复制标题
生长过程中光的光谱光子通量密度分布与黄瓜叶片净光合速率测量之间的相互作用
DOI：
10.1111/ppl.12421
复制
发表时间：
2016
影响因子：
6.4
通讯作者：
Kazuhiro Fujiwara
中科院分区：
文献类型：
--
作者：
Keach Murakami;Ryo Matsuda;Kazuhiro Fujiwara
叶片的净光合速率在生长过程中适应植物的环境。这些速率通常在不同光照条件下生长的植物叶片之间进行测量、评估和比较。在这项研究中，我们比较了在白色发光二极管（LED）光下生长的黄瓜叶片的净光合速率，没有和补充远红光（FR）LED光（W-和WFR-叶，分别）在三种不同的测量光（ML）条件下：各自的生长光（GL），人工日光（AS）和蓝色和红色（BR）光。BR下W-和WFR-叶片之间的光合速率差异大于GL和AS下。换句话说，在生长过程中的补充FR光和光谱光子通量密度分布（SPD）的ML之间的相互作用影响测量的净光合速率。我们发现，叶片光合速率和特性的比较和评价可以根据ML的SPD而有所偏差，特别是对于在FR波段中不同光子通量密度下生长的植物。我们还研究了相互作用的机制。我们证实了激发能在两个光系统（PS）之间的分布变化响应于GL的SPD，这种变化导致的相互作用，在以前的报告中建议。然而，PS化学计量的变化不能完全解释本研究中观察到的激发能分布的调整，这表明可能涉及其他机制的相互作用。
The net photosynthetic rate of a leaf becomes acclimated to the plant's environment during growth. These rates are often measured, evaluated and compared among leaves of plants grown under different light conditions. In this study, we compared net photosynthetic rates of cucumber leaves grown under white light‐emitting diode (LED) light without and with supplemental far‐red (FR) LED light (W‐ and WFR‐leaves, respectively) under three different measuring light (ML) conditions: their respective growth light (GL), artificial sunlight (AS) and blue and red (BR) light. The difference in the measured photosynthetic rates between W‐ and WFR‐leaves was greater under BR than under GL and AS. In other words, an interaction between supplemental FR light during growth and the spectral photon flux density distribution (SPD) of ML affected the measured net photosynthetic rates. We showed that the comparison and evaluation of leaf photosynthetic rates and characteristics can be biased depending on the SPD of ML, especially for plants grown under different photon flux densities in the FR waveband. We also investigated the mechanism of the interaction. We confirmed that the distribution of excitation energy between the two photosystems (PSs) changed in response to the SPD of GL, and that this change resulted in the interaction, as suggested in previous reports. However, changes in PS stoichiometry could not completely explain the adjustment in excitation energy distribution observed in this study, suggesting that other mechanisms may be involved in the interaction.