Cadmium inducible Fe deficiency responses observed from macro and molecular views in tobacco plants |
| |
Authors: | Toshihiro Yoshihara Hirotaka Hodoshima Yoshiyuki Miyano Kazuhiro Shoji Hiroaki Shimada Fumiyuki Goto |
| |
Institution: | (1) Plant Molecular Biology, Laboratory for Environmental Science, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko, Chiba 270-1194, Japan;(2) Plant Molecular Biology and Molecular Genetics, Department of Biological Science and Technology, Science University of Tokyo, Yamazaki 2641, Noda, Chiba 278-8510, Japan |
| |
Abstract: | Responses induced by Cd exposure were assessed in tobacco seedlings (Nicotiana tabacum L.) using macro and molecular indices. The 100 μM of Cd exposure reduced the total dry weight and chlorophyll index of the
seedlings as much as the genuine Fe-deficiency. Concentration of Fe in the shoots decreased, whereas that in the roots increased
by the Cd exposure, especially in the apoplasmic space. It is probable that Cd interferes mainly with the step of Fe-translocation
from the roots to shoots and this sets the upper-part of the plant in a state of Fe-deficiency. The Cd exposure coordinately
increased the expressions of the exogenous and the endogenous Fe-deficiency responsive genes, HvIDS2
pro
::GUS, NtFRO1 and NtIRT1 in the roots. This is the first data to demonstrate the responses of Cd-inducible Fe-deficiency at a molecular level. |
| |
Keywords: | Cadmium toxicity Fe-deficiency Inducible Fe-deficiency IDS2 gene Tobacco plants (Nicotiana tabacum L cv Petit-Havana SR1) |
本文献已被 PubMed SpringerLink 等数据库收录! |
|