Photosynthetic Response of Antarctic and Subantarctic Plants to Light and UV Stress in Undisturbed/Disturbed Habitats

Metadata record for data from ASAC Project 227 Photosynthetic Response of Antarctic and Subantarctic Plants to Light and UV Stress in Undisturbed/Disturbed Habitats including Recommendation for the Promotion of Recolonisation of Damaged Sites. See the link below for public details on this project.From the abstract of the referenced paper:Vegetation downwind of a concrete batching platform at Casey, East Antarctica, has been severely contaminated by cement dust. This paper draws attention to the resilience of the byrophyte Ceratodon compared to lichens in the area. Plant and soil samples collected along a 90 m transect passing directly through the most damaged area and running parallel to the predominantly strong easterly winds indicate a strong positive correlation between chlorophyll and carotenoid concentration and high soil pH. The results suggest that elevated pigment levels in plants close to the batching platform are due to enhanced thylakoid production rather than a disproportionate loss of dry matter. Variable (Fv/Fm) fluorescence measurements and growth cabinet experiments indicate that Ceratodon from even the most heavily contaminated sites is photosynthetically competent and capable of rapid growth under favourable conditions.

本文件为ASAC项目227（ASAC Project 227）的数据集元数据记录，主题为《南极与亚南极植物在未受干扰/受干扰生境中的光合响应及其对光照与紫外胁迫的响应：兼论受损生境修复重建的推广建议》。可通过下方链接获取本项目的公开详情。

引自所参考文献的摘要：南极东部凯西站一处混凝土配料平台下风处的植被已遭受水泥粉尘的严重污染。本研究着重探讨了该区域内苔藓植物（Bryophyte）金发藓属（Ceratodon）相较于地衣的抗逆能力。沿一条横穿污染最严重区域、且与主导东风风向平行的90米样带采集的植物与土壤样本显示，叶绿素（chlorophyll）与类胡萝卜素（carotenoid）浓度与土壤高pH值之间存在显著正相关关系。研究结果表明，靠近配料平台的植物体内色素水平升高，是由于类囊体（thylakoid）生成增强所致，而非干物质出现不成比例的损耗。可变荧光（Fv/Fm）测定与生长箱（growth cabinet）实验结果显示，即便采自污染最严重区域的金发藓属植物，仍具备光合活性，且在适宜条件下可快速生长。