• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Senecio conrathii N.E.Br. (Asteraceae), a new hyperaccumulator of nickel from serpentinite outcrops of the Barberton Greenstone Belt, South Africa
【24h】

Senecio conrathii N.E.Br. (Asteraceae), a new hyperaccumulator of nickel from serpentinite outcrops of the Barberton Greenstone Belt, South Africa

机译：Senecio conrathii N.E.Br. （菊科），一种来自南非巴伯顿绿石带蛇纹岩露头的新型镍超富集剂

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Five nickel hyperaccumulators belonging to the Asteraceae are known from ultramafic outcrops in South Africa. Phytoremediation applications of the known hyperaccumulators in the Asteraceae, such as the indigenous Berkheya coddii Roessler, are well reported and necessitate further exploration to find additional species with such traits. This study targeted the most frequently occurring species of the Asteraceae on eight randomly selected serpentinite outcrops of the Barberton Greenstone Belt. Twenty species were sampled, including 12 that were tested for nickel accumulation for the first time. Although the majority of the species were excluders, the known hyperaccumulators Berkheya nivea N.E.Br. and B. zeyheri (Sond. & Harv.) Oliv. & Hiern subsp. rehmannii (Thell.) Roessler var. rogersiana (Thell.) Roessler hyperaccumulated nickel in the leaves at expected levels. A new hyperaccumulator of nickel was discovered, Senecio conrathii N.E.Br., which accumulated the element in its leaves at 1695 ± 637 µg g_(−1)on soil with a total and exchangeable nickel content of 503 mg kg_(−1)and 0.095 µg g_(−1), respectively. This makes it the third known species in the Senecioneae of South Africa to hyperaccumulate nickel after Senecio anomalochrous Hilliard and Senecio coronatus (Thunb.) Harv., albeit it being a weak accumulator compared with the latter. Seven tribes in the Asteraceae have now been screened for hyperaccumulation in South Africa, with hyperaccumulators only recorded for the Arctoteae and Senecioneae. This suggests that further exploration for hyperaccumulators should focus on these tribes as they comprise all six species (of 68 Asteraceae taxa screened thus far) to hyperaccumulate nickel.
机译：在南非的超镁铁质露头中，已知有五个属于菊科的镍超积累物。菊科中已知的超富集植物，例如本地的Berkheya coddii Roessler，在植物修复方面的应用得到了很好的报道，因此有必要进一步探索以寻找具有这种特性的其他物种。这项研究的目标是在Barberton绿石带的8个随机选择的蛇纹岩露头上发现菊科最常见的物种。采样了20种，其中包括12种，这是首次进行镍累积测试。尽管大多数物种是排斥物种，但已知的超级蓄积植物伯克希亚nivea N.E.Br.和B. zeyheri（Sond。＆Harv。）Oliv。 ＆Hiern subsp.。 rehmannii（Thell。）Roessler var。 rogersiana（Thell。）Roessler在叶片中镍的含量超标于预期水平。发现了一种新的镍超富集菌Senecio conrathii NEBr。，该元素在土壤中以1695±637 µg g _（-1）的含量在其叶片中积累，镍的总交换量为503 mg kg _（-1）和0.095。 µg g _（-1）。这使它成为南非千里光科中第三个已知的镍超富集物种，仅次于千里光异常的Hilliard和Senecio coronatus（Thunb。）Harv。，尽管与后者相比它的蓄积能力很弱。在南非，现已对菊科中的七个部落进行了超富集筛选，仅记录了Arctoteae和千里香科的超富集者。这表明对超蓄积性的进一步探索应集中于这些部落，因为它们包括所有六个物种（迄今已筛选出的68个菊科分类群）中的超蓄积镍。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号