Arsenic accumulation and distribution in Pteris vittata fronds of different maturity: Impacts of soil As concentrations.

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ID: 89055
2019
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Abstract
Arsenic (As) hyperaccumulator Pteris vittata is efficient in As uptake, translocation and accumulation, but the impacts of soil As concentrations on As accumulation and distribution in P. vittata are still unclear. The impacts of soil As (7.3, 63 and 228 mg kg) on plant growth and As accumulation in P. vittata after 6 months of growth were evaluated. Arsenic concentrations in the roots, midribs and pinna margin of P. vittata fronds of different maturity were determined by inductively coupled plasma mass spectrometry (ICP-MS) and scanning electron microscopy coupled with an energy dispersive spectrometer (SEM-EDS). While moderate As level at As didn't impact P. vittata growth, higher As at As decreased plant biomass by 38%. Under As stress, more As was accumulated in the senescing fronds (47%) and mature fronds (11%) than the young fronds. In senescing fronds, As concentrations in pinna margin were 2.3 times that of the midribs, consistent with As-induced necrotic symptom. Arsenic distribution based on SEM-EDS analysis revealed good correlation between Si and As in the pinnae (r = 0.49). Our data showed that As accumulation in pinna margin caused necrosis and Si may have a potential role in As detoxification in P. vittata.
Reference Key
han2019arsenicthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Han, Yong-He;Jia, Meng-Ru;Wang, Shan-Shan;Deng, Jia-Cong;Shi, Xiao-Xia;Chen, Deng-Long;Chen, Yanshan;Ma, Lena Q;
Journal The Science of the total environment
Year 2019
DOI
S0048-9697(19)35290-8
URL
Keywords
translocation plant growth silicon arsenic distribution plant age senescing

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