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首页> 外文期刊>Bulletin of the National Museum of Nature and Science >Chlorophyll Fluorescence in Response to Salt Stress in the Coastal Plant Calystegia soldanella: A Comparison between Coastal and Freshwater Populations
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Chlorophyll Fluorescence in Response to Salt Stress in the Coastal Plant Calystegia soldanella: A Comparison between Coastal and Freshwater Populations

机译：叶绿素荧光对盐胁迫下沿海植物小花甘蓝的响应：沿海和淡水种群之间的比较。

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摘要

Lake Biwa, Japan, is a freshwater lake that was formed about 4 MYA and harbors many coastal plants that commonly inhabit the seashore. Calystegia soldanella is one of the coastal plants that commonly grows on sandy seashores, but also occurs at Lake Biwa as a result of long-term isolation from coastal populations. To assess physiological differentiation between coastal and inland individuals with regard to the response to salinity stress, we measured chlorophyll fluorescence relative to photosynthetic activity after treatment with saltwater irrigation and spray. In addition, we observed the leaf morphology of inland and coastal individuals. Inland individuals at Lake Biwa showed significantly increased photochemical fluorescence as a result of saltwater sprayed onto leaf blades, corresponding to stomatal closure, whereas coastal individuals showed an insignificant decrease in the same parameter. Additionally, coastal individuals tended to have thicker leaf blades with thicker cuticles than those of inland individuals. The differences in photochemical fluorescence quenching and leaf morphology between the inland and coastal individuals imply differing physiological adaptations to each habitat.
机译：日本琵琶湖是一个淡水湖，约4 MYA形成，拥有许多通常栖息在海边的沿海植物。 Calystegia soldanella是通常生长在沙质海岸上的沿海植物之一，但由于与沿海种群长期隔离而在琵琶湖也存在。为了评估沿海地区和内陆地区个体对盐分胁迫的反应的生理差异，我们在盐水灌溉和喷雾处理后测量了叶绿素荧光相对于光合作用的活性。此外，我们观察了内陆和沿海个体的叶片形态。盐水喷到叶片上的结果是，琵琶湖内陆个体的光化学荧光显着增加，这与气孔关闭相对应，而沿海个体的相同参数却没有显着降低。另外，与内陆个体相比，沿海个体倾向于具有较厚的叶片和更厚的表皮。内陆和沿海个体之间光化学荧光猝灭和叶片形态的差异意味着对每个生境的生理适应性也不同。

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