Studies on the mechanism of cadmium accumulation in Tagetes erecta L
Hydroponic experiments were carried out to study the effects of cell division inhibitor (Maleic hydrazide MH) and protein synthesis inhibitor ( Cycloheximide CHI) on Cd accumulation in Tagetes erecta L and their possible mechanisms.Seedlings were exposed to 4 mmol L-1 MH or 3 μmol L-1 CHI in 0.1 mg L-1 Cd-containing solution for 3 days.After treatment,the Cd content in leaves was significantly (P<0.05) reduced under MH or CHI treatment,which was consistent with the decreased soluble protein contents in leaves,suggesting that protein synthesis plays a role in Cd accumulation in leaves of Tagetes erecta L.Both of the plant growth inhibitors led to increased Cd contents in roots compared with the control,corresponding with increased GSH,Cys or γEC content under MH or CHI treatment,indicating that those S-containing compounds may be related to the increased Cd content in roots under the plant growth inhibitor treatments.On the other hand,the two inhibitors increased the citric acid content in all the tissues of Tagetes erecta L except for that in leaves under CHI treatment.All the results suggest that protein synthesis may be responsible for Cd accumulation in leaves of Tagetes erecta L,while the S-containing compounds and organic acids are associated with Cd absorption in roots of Tagetes erecta L.
Tagetes erecta L plant growth inhibitor S-containing compounds organic acids
Yinqiu Zhang Peidong Tai Peijun Li Qing Zhao Dianbo Dong
Key Laboratory of Terrestrial Ecological Process,Institute of Applied Ecology,Chinese Academy of Sci Key Laboratory of Terrestrial Ecological Process,Institute of Applied Ecology,Chinese Academy of Sci
国际会议
哈尔滨
英文
211-217
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）