Pairs of peaks stabilize output power A counterintuitive feature of photosynthesis is that the primary pigments involved in absorbing light—for example, chlorophyll a and b in plants—do not all absorb right at the peak of the spectrum but instead are offset from the peak and each other. Arp et al. formulated a network model that explains how using pigments with this absorption-peak pattern can mitigate internal and external fluctuations in energy transfer, minimizing noise in output power (see the Perspective by Duffy). The model accurately reproduces absorption peaks for three diverse photosynthetic systems from different spectral environments. Such a mechanism may provide an underlying robustness to biological photosynthetic processes that can be further tuned and tweaked to adapt to longer-scale fluctuations in light intensity. Science, this issue p. 1490; see also p. 1427 Optimally spaced pairs of off-center absorption peaks can maximize photosynthetic output in the face of external noise. Photosynthesis achieves near unity light-harvesting quantum efficiency yet it remains unknown whether there exists a fundamental organizing principle giving rise to robust light harvesting in the presence of dynamic light conditions and noisy physiological environments. Here, we present a noise-canceling network model that relates noisy physiological conditions, power conversion efficiency, and the resulting absorption spectra of photosynthetic organisms. Using light conditions in full solar exposure, light filtered by oxygenic phototrophs, and light filtered under seawater, we derived optimal absorption characteristics for efficient solar power conversion. We show how light-harvesting antennae can be tuned to maximize power conversion efficiency by minimizing excitation noise, thus providing a unified theoretical basis for the observed wavelength dependence of absorption in green plants, purple bacteria, and green sulfur bacteria.

中文翻译：

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使嘈杂的天线安静可重现光合作用光捕获光谱

成对的峰值稳定了输出功率 光合作用的一个违反直觉的特征是参与吸收光的主要色素——例如植物中的叶绿素 a 和 b——并不都在光谱的峰值处吸收，而是从峰值和彼此。阿尔普等人。制定了一个网络模型，解释了使用具有这种吸收峰模式的颜料如何减轻能量转移的内部和外部波动，最大限度地减少输出功率中的噪声（参见 Duffy 的观点）。该模型准确地再现了来自不同光谱环境的三种不同光合系统的吸收峰。这种机制可以为生物光合作用过程提供潜在的鲁棒性，可以进一步调整和调整以适应更长时间的光强度波动。科学，这个问题 1490; 另见第 1427 对最佳间隔的偏心吸收峰可以在面对外部噪音时最大限度地提高光合输出。光合作用实现了接近统一的光捕获量子效率，但在动态光照条件和嘈杂的生理环境中是否存在一个基本的组织原理，导致强大的光捕获仍然未知。在这里，我们提出了一个噪声消除网络模型，该模型将嘈杂的生理条件、功率转换效率和由此产生的光合生物的吸收光谱联系起来。使用完全暴露在阳光下的光照条件、由含氧光养生物过滤的光和在海水中过滤的光，我们得出了高效太阳能转换的最佳吸收特性。