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Foliar elemental profiles in the ultramafic flora of Kinabalu Park (Sabah, Malaysia)

机译:Kinabalu公园(马来西亚沙巴)的超镁铁质植物区系中的叶元素概况

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The foliar elemental profile of most plants reflects that of the soil on which plants grow in their natural habitat. The aim of this study was to elucidate foliar elemental profiles in the ultramafic flora of Kinabalu Park in Sabah, Malaysia. Kinabalu Park is ideal for studying plant elemental profiles because of its exceptionally rich flora and diversity in soil types. Foliar elemental profiles of 594 plant species in 99 families were analysed (totalling 1710 samples). This included 495 species (90 families) from ultramafic soils, and 120 species (45 families) from non-ultramafic soils (used as a comparison dataset). In general, the foliar elemental uptake ranges from exclusion of phytotoxic elements such as Ni and Mn, to a limited number of plant species characterised by extreme accumulation of specific elements, including trace elements (Co, Mn, Ni, Zn,), or non-essential elements (Al). This research identified hyperaccumulator behaviour (as defined by exceedances of established threshold foliar concentrations) in numerous plant species: Al > 1000 μg g_(−1)(38 spp.), Mn > 10 mg g_(−1)(7 spp.), Co > 300 μg g_(−1)(3 spp.), Ni > 1000 μg g_(−1)(24 spp.) and Zn > 3000 μg g_(−1)(2 spp.). Distinct phylogenetic patterns emerged for Ni in which 18 of the identified 24 Ni hyperaccumulators were in the order Malpighiales, predominantly in the families Phyllanthaceae, Salicaceae and Violaceae.
机译:大多数植物的叶元素特征反映了植物在其自然栖息地中生长的土壤的特征。这项研究的目的是阐明马来西亚沙巴Kinabalu公园的超镁铁质植物区系中的叶元素分布。京那巴鲁公园(Kinabalu Park)具有极为丰富的植物区系和土壤类型多样性,是研究植物元素概况的理想之选。分析了99个科的594种植物的叶元素概况(总共1710个样品)。其中包括来自超镁铁质土壤的495种(90个科)和来自非超镁铁土的120种(45个科)(用作比较数​​据集)。通常,叶面元素的吸收范围从排除诸如Ni和Mn之类的植物毒性元素到数量有限的植物物种,其特征是特定元素的极度积累,包括痕量元素(Co,Mn,Ni,Zn,或-基本元素(Al)。这项研究确定了多种植物物种中的过度蓄积行为(定义为超过既定的叶面浓度阈值):Al> 1000μgg _(-1)(38 spp。),Mn> 10 mg g _(-1)(7 spp。) ,Co> 300μg_(-1)(3 spp。),Ni> 1000μg_(-1)(24 spp。)和Zn> 3000μg_(-1)(2 spp。)。镍出现了不同的系统发育模式,其中24种Ni的超积累植物中有18种按马尔皮古勒斯顺序排列,主要分布在菊科,水杨科和堇菜科中。

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