Interactive Effects of Salt Stress on Ultraviolet-B Radiation on Halophytic Plant Growth in Field and Controlled Laboratory Studies

关于臭氧消耗率不断上升的报告， 对由此产生的 地球表面的紫外线B辐射 记录在案。 植物科学家已经研究了 增加UV-B辐射对作物的影响，但 在自然生态系统中本土植物的反应 大部分都是未知的。 有意义的影响研究 增加UV-B辐射对本地植物的影响 包括与其自然环境相关的压力， 环境. 虽然沿海盐沼高度 生产力，非常低的植物多样性， 高盐浓度创造的栖息地 对干扰非常敏感 农作物的数据 表明植物反应的广泛变化，表明 可能的选择性影响，可能是非常有害的， 自然界中的微妙平衡 本研究的目的是探讨互动的 增加UV-B辐射和盐胁迫的影响 沿海盐沼的一种全生植物。 具体 目标包括调查是否增加 UV-B辐射对物种的选择性影响 以及这些植物，它们通常是 暴露于高光强下，产生保护作用 更高水平的UV-B辐射。

Reports of increasing rates of ozone depletion and predictions of the resulting increased levels of ultraviolet-B radiation at the earth's surface have been documented. Plant scientists have investigated the effects of increasing UV-B radiation on crop plants, but the responses in native plants in natural ecosystems are largely unknown. Meaningful studies of the effects of increasing UV-B radiation on native plants should include the stresses associated with their natural environments. Although coastal salt marshes are highly productive, the very low plant diversity together with high salt concentrations create habitats which are not very resilient to disturbances. The data for crop plants indicate wide variation in plant responses, suggesting possible selective effects that could be very damaging to the delicate balances present in natural communities. The purpose of this study id to examine the interactive effects of increasing UV-B radiation and salt stress in holophytic plants of coastal salt marshes. Specific objectives include investigations of whether increasing UV-B radiation results in selective effects on species composition and whether these plants, which are normally exposed to high light intensities, develop protective mechanisms against higher levels of UV-B radiation.