Cadmium stress alters the redox reaction and hormone balance in oilseed rape (Brassica napus L.) leaves

Yan, Hui, Filardo, Fiona, Hu, Xiaotao, Zhao, Xiaomin and Fu, DongHui (2015) Cadmium stress alters the redox reaction and hormone balance in oilseed rape (Brassica napus L.) leaves. Environmental Science and Pollution Research, 23 4: 3758-3769. doi:10.1007/s11356-015-5640-y


Author Yan, Hui
Filardo, Fiona
Hu, Xiaotao
Zhao, Xiaomin
Fu, DongHui
Title Cadmium stress alters the redox reaction and hormone balance in oilseed rape (Brassica napus L.) leaves
Journal name Environmental Science and Pollution Research   Check publisher's open access policy
ISSN 0944-1344
1614-7499
Publication date 2015-10-24
Year available 2015
Sub-type Article (original research)
DOI 10.1007/s11356-015-5640-y
Open Access Status Not Open Access
Volume 23
Issue 4
Start page 3758
End page 3769
Total pages 12
Place of publication Heidelberg, Germany
Publisher Springer
Collection year 2016
Language eng
Formatted abstract
In order to understand the physiological response of oilseed rape (Brassica napus L.) leaves to cadmium (Cd) stress and exploit the physiological mechanisms involved in Cd tolerance, macro-mineral and chlorophyll concentrations, reactive oxygen species (ROS) accumulation, activities of enzymatic antioxidants, nonenzymatic compounds metabolism, endogenous hormonal changes, and balance in leaves of oilseed rape exposed to 0, 100, or 200 μM CdSO4 were investigated. The results showed that under Cd exposure, Cd concentrations in the leaves continually increased while macro-minerals and chlorophyll concentrations decreased significantly. Meanwhile, with increased Cd stress, superoxide anion (O 2 • − ) production rate and hydrogen peroxide (H2O2) concentrations in the leaves increased significantly, which caused malondialdehyde (MDA) accumulation and oxidative stress. For scavenging excess accumulated ROS and alleviating oxidative injury in the leaves, the activity of enzymatic antioxidants, such as superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), was increased significantly at certain stress levels. However, with increased Cd stress, the antioxidant enzyme activities all showed a trend towards reduction. The nonenzymatic antioxidative compounds, such as proline and total soluble sugars, accumulated continuously with increased Cd stress to play a long-term role in scavenging ROS. In addition, ABA levels also increased continuously with Cd stress while ZR decreased and the ABA/ZR ratio increased, which might also be providing a protective role against Cd toxicity.
Keyword Cadmium stress
Brassica napus L
Tolerance
ROS
Enzymatic and nonenzymatic antioxidants
Endogenous hormones
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
Queensland Alliance for Agriculture and Food Innovation
 
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Created: Tue, 17 Nov 2015, 11:49:07 EST by Dr Fiona Filardo on behalf of Centre for Plant Science