Characteristics of chromium(III) uptake in hyperaccumulator Leersia hexandra Swartz
Characteristics of chromium(III) uptake in hyperaccumulator Leersia hexandra Swartz
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超富集植物Leersia hexandra Swartz对铬(III)的吸收特征
DOI：
10.1016/j.envexpbot.2011.05.008
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发表时间：
2011-12
影响因子：
5.7
通讯作者：
Hu, Cheng
中科院分区：
文献类型：
--
作者：
Liu, Jie;Duan, Chang-Qun;Zhang, Xue-Hong;Zhu, Yi-Nian;Hu, Cheng
Characteristics of Cr(III) uptake by roots of hyperaccumulator Leersia hexandra Swartz were studied using pot-culture experiment. The results showed that the uncoupler, 2,4-dinitrophenol (DNP), and low temperature significantly limited the Cr(III) uptake (p<0.05), which indicated an active uptake of Cr(III) in the roots. The calcium channel blocker “LaCl3” and the kalium channel blocker “tetraethyl ammonium chloride (TEA)” did not inhibit the Cr(III) uptake, i.e., the Cr(III) uptake was not related to the K+or Ca2+ion channels. However, an inhibiting effect of Fe(III) on the Cr(III) uptake was observed in the roots of L. hexandra. The Cr(III) uptake followed Michaelis–Menten kinetics with a Michaelis constant (Km) of 123.9μmol/L, which was increased by 2-fold in the presence of 300μmol/L Fe(III). The Fe-deficiency increased the maximum uptake velocity (Vmax) by 33.5% and decreased the Michaelis constant by 23.2%. The antagonistic effect of Fe(III) on Cr(III) uptake suggest that the Cr(III) uptake by the roots of L. hexandra may be mediated partly via transporters for the Fe(III)–phytosiderophore complex.
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影响因子：
3.9
作者：
V. Ramana;K. Sastry
通讯作者：
V. Ramana;K. Sastry
影响因子：
4.3
作者：
SKEFFINGTON, RA;SHEWRY, PR;PETERSON, PJ
通讯作者：
PETERSON, PJ
影响因子：
7.4
作者：
Lasat, MM;Baker, AJM;Kochian, LV
通讯作者：
Kochian, LV
影响因子：
4.9
作者：
Jian Wu;F. Zhao;Artak Ghandilyan;B. Logoteta;Myriam Olortegui Guzman;H. Schat;Xiaowu Wang;Mark G. M. Aarts
通讯作者：
Jian Wu;F. Zhao;Artak Ghandilyan;B. Logoteta;Myriam Olortegui Guzman;H. Schat;Xiaowu Wang;Mark G. M. Aarts
影响因子：
3.5
作者：
M. Pillichshammer;T. Pümpel;R. Pöder;K. Eller;J. Klíma;F. Schinner
通讯作者：
M. Pillichshammer;T. Pümpel;R. Pöder;K. Eller;J. Klíma;F. Schinner