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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Assessing the vitality of Himalayan lichens by measuring their photosynthetic performances using chlorophyll fluorescence technique
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Assessing the vitality of Himalayan lichens by measuring their photosynthetic performances using chlorophyll fluorescence technique

机译：通过使用叶绿素荧光技术测量喜马拉雅地衣的光合性能来评估其生命力

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摘要

Photosynthetic performances of 82 lichens occurring in Western Himalayas were determined using chlorophyll fluorescence. F-v/F-m ranged from 0.023 to 0.655, with terricolous Cladonia subconistea at alpine region having maximum value. Photosynthetic performances of alpine lichens were found to be better than those of temperate due to the influence of favourable climate, wet soil and rock in the region. As the study was carried out during early summer, most of the lichens started experiencing stress which is evident by their F-v/F-m values. As many as 10 chlorolichens (with green alga as photobiont) growing in temperate region are severely stressed and have values <0.1. The stress components in the study area are mostly water availability and high intensity light. The cyanolichens (with blue green alga as photobiont) have relatively lower F-v/F-m ranging from 0.075 to 0.315. On the basis of their F-v/F-m values, the lichens in the present study are classified into three categories: normal, moderate and severely stressed with values ranging from 0.5 to 0.76, 0.3 to 0.49 and 0.01 to 0.29 respectively. The possible influence of crowded apothecia, growth form, substratum and association with moss towards the photosynthetic performance of lichens and their community are discussed.
机译：利用叶绿素荧光测定喜马拉雅西部82个地衣的光合性能。 F-v / F-m的范围为0.023至0.655，其中在高山地区的陆生克拉德松枝菌具有最大值。由于该地区有利的气候，潮湿的土壤和岩石的影响，发现高山地衣的光合性能优于温带植物。由于该研究是在初夏进行的，因此大多数地衣开始承受压力，这从其F-v / F-m值可以明显看出。在温带地区生长的多达10种氯地衣（以绿藻为光生物素）受到严重胁迫，其值<0.1。研究区域的压力成分主要是水的可利用性和高强度的光。氰化物（以蓝藻作为光生物素）具有相对较低的F-v / F-m，范围为0.075至0.315。根据其F-v / F-m值，本研究中的地衣分为三类：正常，中度和重度应激，其值分别为0.5至0.76、0.3至0.49和0.01至0.29。讨论了拥挤的角质层，生长形式，基质以及与苔藓的结合对地衣及其群落光合性能的可能影响。

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