Photophysiology of smooth cordgrass (Sporobolus alterniflorus) measured using rapid light curves

Smooth cordgrass (Sporobolus alterniflorus) (previously known as Spartina alterniflora) is often the dominant intertidal plant in saltmarshes on the east coast of the United States. It is an invasive species in several locations globally, where it has been introduced accidently, or deliberately to stabilize eroding shorelines. These data present measurements of the photophysiology of photosynthesis in Sporobolus alterniflorus. Measurements were made in situ using pulse amplitude modulated (PAM) fluorescence. The data includes measurements of the quantum yield of photosystem II and rapid light curves (RLCs), which were used to determine electron transport rates (ETRs) and parameterize the relationship between ETR and photosynthetic photon flux density (PPFD). The measurements are supported by in situ environmental data, specifically measurements of PPFD and air temperature. These data have potential value to researchers interested in the physiology of saltmarsh plants and grasses, and estuarine ecologists and resource managers.

互花米草（Smooth cordgrass，学名Sporobolus alterniflorus，曾用名Spartina alterniflora）常为美国东海岸盐沼的优势潮间带植物。该物种在全球多个区域为入侵物种，多因意外引入或为稳定侵蚀岸线而被有意引种。本数据集收录了互花米草光合作用的光生理测量数据。测量采用脉冲振幅调制（Pulse Amplitude Modulated, PAM）荧光技术原位开展。数据集涵盖光系统II量子产率与快速光响应曲线（Rapid Light Curves, RLCs）的测量结果，这些数据被用于计算电子传递速率（Electron Transport Rates, ETRs），并拟合电子传递速率与光合光子通量密度（Photosynthetic Photon Flux Density, PPFD）之间的量化关系。本次测量配套了原位环境观测数据，具体包括光合光子通量密度与气温的测定值。本数据集对关注盐沼植物与禾本科植物生理、河口生态学及资源管理的研究人员具有参考价值。