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Scientia Silvae Sinicae ›› 2015, Vol. 51 ›› Issue (4): 156-163.doi: 10.11707/j.1001-7488.20150420

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Uptake, Accumulation, and Phytotoxicity of fluorion in Pterocarya stenoptera Seedlings

Qu Muzi, Xie Huicheng, Li Chuanrong, Wang Li   

  1. Taishan Forest Eco-station of State Forestry Administration Forestry College of Shandong Agricultural University Tai'an 271018
  • Received:2013-12-16 Revised:2015-01-23 Online:2015-04-25 Published:2015-05-20

Abstract:

【Objective】This study aims at exploring the phytoremediation potential of Pterocarla stenoptera seedlings to fluorion pollution.【Method】 we investigated the influence of culture time, pH value and fluoride concentration in culture medium on absorption, accumulation, enrichment and translocation of fluoride in P. stenoptera seedlings, as well as normalized relative transpiration (NRT) of P. stenoptera seedlings. 【Result】 (1) The accumulation of fluoride in stems, leaves and roots of P. stenoptera seedlings exhibited an increasing tendency with increasing concentration of fluoride. The fluoride concentration in stems, leaves and roots of P. stenoptera seedlings reached up to 1604.60, 59.41 and 40.80 mg ·kg-1 respectively when treated with 10 mmol ·L-1 fluoride. (2) Fluoride concentration was highest in roots and lowest in leaves when treated with 10 mmol ·L-1 fluoride, while fluoride concentration was highest in roots and lowest in stems when treated with 0.5-5 mmol ·L-1 fluoride. The translocation factor (Tf) was between 0.029-0.125. The translocation of fluoride in P. stenoptera was inhibited probably because high concentration fluoride would cause serious phytotoxicity to P. stenoptera, (3) The NRT of P. stenoptera seedlings exhibited a decreasing tendency along with culture time. The change of transpiration in P. stenoptera seedlings showed significant difference(P < 0.05)when treated with fluoride 5 and 10 mmol ·L-1. (4) The capacities of translocation and accumulation of fluoride in stems, leaves and roots of P. stenoptera seedlings were highest in acidic solution. The damage to the P. stenoptera seedlings in acidic solution was more serious than that in alkaline solution. The fluoride had little damage to P. stenoptera seedlings in alkaline solution. P. stenoptera seedlings had good and sustained effect for removal of fluoride in this alkaline condition. (5) In order to achieve the best treatment effect, we can deal with the polluted water with P. stenoptera seedlings in the acidic conditions when the fluoride content is less than 2.5 mmol ·L-1; and treated the polluted water with P. stenoptera under alkaline conditions when the fluoride content is between 2.5 and 5 mmol ·L-1. 【Conclusion】The study showed that P. stenoptera had wide potential application in cleaning water and soil in those fluoride contaminated areas.

Key words: Pterocarla stenoptera, seedlings, fluorion, bioaccumulation, phytotoxicity

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