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一种在富含金属的尾矿中具有植物稳定特性的药用地下芽植物。

, a Medicinal Geophyte with Phytostabilization Properties in Metal-Enriched Mine Tailings.

作者信息

Clarke Vincent C, Marcelo-Silva João, Claassens Sarina, Siebert Stefan J

机构信息

Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa.

School of Molecular and Life Sciences, Curtin University, Bentley, WA 6102, Australia.

出版信息

Plants (Basel). 2023 Dec 26;13(1):79. doi: 10.3390/plants13010079.

Abstract

Ancient grasslands are lost through transformation to agriculture, mining, and urban expansion. Land-use change leads to ecosystem degradation and a subsequent loss of biodiversity. Globally, degraded grasslands have become a priority for restoration efforts to recover lost ecosystem services. Although the ecological and social benefits of woody species and grasses are well documented, limited research has considered the use of forbs for restoration purposes despite their benefits (e.g., C sequestration and medicinal uses). The aim of this study was to determine if (Burm.f.) Milne-Redh. & Schweick., a medicinal geophyte, could form part of restoration initiatives to restore mine soils in grasslands of the South African Highveld. A pot experiment was conducted to assess the performance of in a random design, with three soil treatments varying in level of degradation and metal contamination. The plants were monitored for 12 months, and the morphological characters were measured monthly to assess performance and survival. Inductively coupled plasma mass spectrometry (ICP-MS) was used to determine the soil and plant tissue concentration of potentially toxic metals. The results indicated that mine tailings negatively affected the growth and development of . Although the survival rates indicated that it could survive on tailings, its below-par productivity indicated that the species is not ideal for restoration purposes unless the tailings are ameliorated with topsoil. Although there was root accumulation of metals (Co, Cd, Cu, Mo, and Zn), there was no translocation to the bulbs and leaves, which makes suitable for medicinal use even when grown on metal-enriched soil. This species may not be viable for phytoremediation but is a contender to be used in phytostabilization due to its ecological advantages and the fact that it does not accumulate or store metals. These findings underscore the importance of considering geophytes in grassland restoration strategies, expanding their ecological and societal benefits beyond conventional approaches.

摘要

古代草原因转变为农业用地、用于采矿和城市扩张而消失。土地利用变化导致生态系统退化以及随后生物多样性丧失。在全球范围内,退化草原已成为恢复努力的重点,以恢复丧失的生态系统服务。尽管木本物种和草本植物的生态和社会效益已有充分记载,但尽管有其益处(例如碳固存和药用),关于将杂草用于恢复目的的研究却很有限。本研究的目的是确定药用地下芽植物白芨(Bletilla striata (Thunb. ex A. Murray) Rchb. f.)是否可以成为南非高地草原矿山土壤恢复倡议的一部分。进行了一项盆栽试验,以随机设计评估白芨在三种退化程度和金属污染程度不同的土壤处理中的表现。对这些植物进行了12个月的监测,每月测量形态特征以评估其表现和存活率。使用电感耦合等离子体质谱法(ICP-MS)测定土壤和植物组织中潜在有毒金属的浓度。结果表明,尾矿对白芨的生长和发育产生了负面影响。尽管存活率表明它可以在尾矿上存活,但其低于正常水平的生产力表明,除非用表土改良尾矿,否则该物种不太适合用于恢复目的。尽管根部积累了金属(钴、镉、铜、钼和锌),但没有向球茎和叶片转移,这使得白芨即使生长在富含金属的土壤上也适合药用。该物种可能不适用于植物修复,但由于其生态优势以及它不积累或储存金属这一事实,它是用于植物稳定化的有力竞争者。这些发现强调了在草原恢复策略中考虑地下芽植物的重要性,将其生态和社会效益扩展到传统方法之外。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1ab0/10780652/a36072334ece/plants-13-00079-g001.jpg

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