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Title:: Effect of Pb stress on Pb Accumulation and Non-protein Thiol Content in Louisiana Iris

Author(s):: Louisiana iris；Pb stress；accumulation；non-protein thiol；GSH；Cys; （1.Suzhou Polytechnical Institute of Agriculture，Suzhou，Jiangsu 215008；2.Institute of Botany，Jiangsu Province and the Chinese Academy of Science，Nanjing，Jiangsu 210014）

Keywords:: Louisiana iris; Pb stress; accumulation; non-protein thiol; GSH; Cys

PACS:: -

DOI:: 10.11937/bfyy.201521022

Abstract:: Taking Louisiana iris as material，the effects of lead (Pb) stress on Pb content and the contents of non-protein thiols (NPT) in roots，rhizomes and leaves of Louisiana iris were studied by hydroponic culture.The results showed that Louisiana iris variety ‘Professor Neil’ accumulated and enriched relatively large amount of Pb and was the highest Pb tolerant variety.Pb contents in leaves，rhizomes and roots increased with the Pb level enhanced in the liquid and the content order from highest to the least were root>rhizome>leaf.Pb content in the leaves of ‘Professor Neil’ under 800 mg/L Pb treatment were the maximum and reached to 4 011 mg/kg DW.Pb transfer rate (R/R) from root to rhizome showed a trend of rise first and then dropped and in 800 mg/L Pb treatment maximum and reached 10.02%，and Pb transfer rate (R/L) from rhizome to leaf showed similar trend with R/R，in 600 mg/L Pb reached the maximum and was 57.78%.As the Pb concentrations (0-600 mg/L) increased and the stress time prolonged，the contents of GSH and Cys were significantly increased，showing these biochemical compounds might play an important role in Pb detoxification.

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Effect of Pb stress on Pb Accumulation and Non-protein Thiol Content in Louisiana Iris(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

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