灌木丛
地中海气候
温带气候
磷酸酶
植被(病理学)
生态系统
土壤水分
环境科学
化学
生态学
生物
酶
生物化学
医学
病理
作者
Marc Estiarte,Josep Peñuelas,Jordi Sardans,Bridget A. Emmett,Alwyn Sowerby,Claus Beier,Inger Kappel Schmidt,Albert Tietema,M.J.M. van Meeteren,Edit Kovács Láng,Péter Máthé,Paolo De Angelis,G. de Dato
出处
期刊:PubMed
日期:2008-01-01
卷期号:29 (1): 25-9
被引量:5
摘要
Root-surface phosphatase activities were measured in natural and semi-natural shrublands across an European climatic gradient of temperature and rainfall including Wales (WL), Denmark (DK), Netherlands (NL), Hungary (HU), Italy (IT) and Spain (SP). In each site a warming experiment was conducted since 1999 or 2001 by means of passive night-time warming using reflective curtains that covered the vegetation at night. The treatments increased yearly average soil temperatures around 0. 8 degrees C in most of sites. Root-surface phosphatase activity values ranged between 56 mg PNP g(-1) h(-1) in IT and 3.5 mg PNP g(-1) h(-1) in HU. Warming had no effect on root-surface phosphatase activity across the sites and only in Hungary a slight increase was detected. Plants at Mediterranean sites (IT, SP) showed a higher root-surface phosphatase activity than plants at temperate sites (WL, NL, DK). We suggest it might be an adaptation of plant species evolved under Mediterranean climate that allows them a) to compensate in wet period for the decrease in phosphatase activity, and thus P uptake, during drought periods, and/or b) to benefit from soluble organic P flushes following the frequent drying-rewetting episodes experienced by soils in Mediterranean ecosystems.
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