Quieting a noisy antenna reproduces photosynthetic light-harvesting spectra

doi:10.1126/science.aba6630

GSTDTAP > 气候变化

DOI	10.1126/science.aba6630
	Quieting a noisy antenna reproduces photosynthetic light-harvesting spectra
	Trevor B. Arp; Jed Kistner-Morris; Vivek Aji; Richard J. Cogdell; Rienk van Grondelle; Nathaniel M. Gabor
	2020-06-26
发表期刊	Science
出版年	2020
英文摘要	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][1]; see also p. [1427][2] 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. [1]: /lookup/doi/10.1126/science.aba6630 [2]: /lookup/doi/10.1126/science.abc8063
领域	气候变化 ; 资源环境
URL	查看原文
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/278219
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Trevor B. Arp,Jed Kistner-Morris,Vivek Aji,et al. Quieting a noisy antenna reproduces photosynthetic light-harvesting spectra[J]. Science,2020.
APA	Trevor B. Arp,Jed Kistner-Morris,Vivek Aji,Richard J. Cogdell,Rienk van Grondelle,&Nathaniel M. Gabor.(2020).Quieting a noisy antenna reproduces photosynthetic light-harvesting spectra.Science.
MLA	Trevor B. Arp,et al."Quieting a noisy antenna reproduces photosynthetic light-harvesting spectra".Science (2020).