Rediscovering leaf optical properties: New insights into plant acclimation to solar UV radiation
Rediscovering leaf optical properties: New insights into plant acclimation to solar UV radiation
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DOI：
10.1016/j.plaphy.2014.11.015
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发表时间：
2015-08-01
影响因子：
6.5
通讯作者：
Wargent, Jason J.
中科院分区：
文献类型：
--
作者：
Barnes, Paul W.;Flint, Stephan D.;Wargent, Jason J.
紫外线吸收化合物（黄曲霉素和其他苯丙素衍生物）的积累以及由此导致的叶表皮紫外线透射率（T-UV）的降低是抵抗紫外线辐射的潜在有害影响的主要保护机制，并且是植物对变化的紫外线环境的总体适应性响应的关键组成部分。传统的T-UV测量是费力的，耗时的和破坏性的或侵入性的，从而限制了他们的能力，有效地进行多个测量的光学特性的植物在现场。快速，非破坏性的光学方法的发展，确定T-UV允许检查的UV光学特性的叶子增加复制，在一个更精细的时间尺度上，并使同一叶随着时间的推移重复采样。因此，这项技术允许以以前不可能的方式研究植物对紫外线的适应反应。在这里，我们提供了一个简短的回顾，这些早期的研究检查叶紫外光的光学特性和他们的一些重要贡献，描述了更新的非侵入性测量表皮紫外线透射率的原则，并突出几个案例研究，揭示了这种技术是如何提供新的见解到这种紫外线驯化反应在植物中，这是远远超过以前认为的塑料和动态。(C)2014年Elsevier Masson SAS。All rights reserved.
The accumulation of UV-absorbing compounds (fiavonoids and other phenylpropanoid derivatives) and resultant decrease in the UV transmittance of the epidermis in leaves (T-UV), is a primary protective mechanism against the potentially deleterious effects of UV radiation and is a critical component of the overall acclimation response of plants to changing UV environments. Traditional measurements of T-UV were laborious, time-consuming and destructive or invasive, thus limiting their ability to efficiently make multiple measurements of the optical properties of plants in the field. The development of rapid, nondestructive optical methods of determining T-UV has permitted the examination of UV optical properties of leaves with increased replication, on a finer time scale, and enabled repeated sampling of the same leaf over time. This technology has therefore allowed for studies examining acclimation responses to UV in plants in ways not previously possible. Here we provide a brief review of these earlier studies examining leaf UV optical properties and some of their important contributions, describe the principles by which the newer non-invasive measurements of epidermal UV transmittance are made, and highlight several case studies that reveal how this technique is providing new insights into this UV acclimation response in plants, which is far more plastic and dynamic than previously thought. (C) 2014 Elsevier Masson SAS. All rights reserved.