Department of Plant Biology & Pathology, Rutgers University, New Brunswick, NJ 08901, USA.
J Integr Plant Biol. 2010 Apr;52(4):377-87. doi: 10.1111/j.1744-7909.2010.00939.x.
The ultraviolet-B (UV-B) portion of sunlight has received much attention in the last three decades, because radiation from this spectral region increases due to the stratospheric ozone depletion, which results from increases of chlorofluorocarbons in the atmosphere. Plant responses to UV-B exposure vary greatly and the interpretation of and comparison between studies is hindered, mainly by the contrasting experimental conditions used and interactive factors such as low light levels and possible artifacts due to the artificial experimental conditions. It seems likely that increases in solar UV-B radiation of the magnitude anticipated under current stratospheric ozone projections will not significantly inhibit photosynthesis and cause DNA damage in plants. This is in part due to the well-evolved protection mechanisms present in most plant species. One of the significant plant responses to UV-B is changes in foliar secondary chemistry, which could be translated into significant effects at higher trophic levels through plant-herbivore interactions and decomposition. Enhanced UV-B radiation due to stratospheric ozone depletion could also cause morphological changes that would affect competitive interactions, especially if contrasting UV-B sensitivity exists among the competitors.
在过去的三十年中，阳光中的紫外线-B（UV-B）部分受到了广泛关注，因为大气中氯氟碳化合物的增加导致平流层臭氧耗竭，从而导致该光谱区域的辐射增加。植物对 UV-B 暴露的反应差异很大，并且由于使用的实验条件不同以及低光照水平和可能由于人工实验条件而产生的假象等交互因素，研究之间的解释和比较受到阻碍。似乎在当前平流层臭氧预测下预期的太阳 UV-B 辐射增加幅度不会显著抑制光合作用并导致植物中的 DNA 损伤。这部分是由于大多数植物物种中存在经过良好进化的保护机制。植物对 UV-B 的重要反应之一是叶片次生化学物质的变化，如果通过植物-食草动物相互作用和分解作用，这可能会对更高营养级产生重大影响。由于平流层臭氧耗竭导致的增强的 UV-B 辐射也可能导致形态变化，从而影响竞争相互作用，特别是如果竞争物种之间存在不同的 UV-B 敏感性。
