Heavy metal-mediated toxicity to maize: oxidative damage, antioxidant defence response and metal distribution in plant organs

2018 ◽  
Vol 16 (8) ◽  
pp. 4873-4886 ◽  
Author(s):  
A. Rizvi ◽  
M. S. Khan
Keyword(s):  
Heavy Metal ◽  
Oxidative Damage ◽  
Defence Response ◽  
Metal Distribution ◽  
Antioxidant Defence ◽  
Plant Organs

Fissure and mineral weathering impacts on heavy metal distribution in sludge-amended soil

2011 ◽  
Vol 346 (1-2) ◽  
pp. 29-44 ◽  
Author(s):  
Dominique Proust ◽  
Jacinthe Caillaud ◽  
Claude Fontaine ◽  
Michel Fialin ◽  
Christian Courbe ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Mineral Weathering ◽  
Metal Distribution ◽  
Heavy Metal Distribution ◽  
Amended Soil

The spatial variability of heavy metal distribution in the suburban farmland of Taihang Piedmont Plain, China

2009 ◽  
Vol 332 (6) ◽  
pp. 558-566 ◽  
Author(s):  
Pingguo Yang ◽  
Renzhao Mao ◽  
Hongbo Shao ◽  
Yunfeng Gao
Keyword(s):  
Heavy Metal ◽  
Spatial Variability ◽  
Metal Distribution ◽  
Piedmont Plain ◽  
Heavy Metal Distribution

Hydrogen-rich water-alleviated ultraviolet-B-triggered oxidative damage is partially associated with the manipulation of the metabolism of (iso)flavonoids and antioxidant defence in Medicago sativa

2015 ◽  
Vol 42 (12) ◽  
pp. 1141 ◽  
Author(s):  
Yanjie Xie ◽  
Wei Zhang ◽  
Xingliang Duan ◽  
Chen Dai ◽  
Yihua Zhang ◽  
...  
Keyword(s):  
Oxidative Damage ◽  
Medicago Sativa ◽  
H2 Production ◽  
Hydrogen Gas ◽  
Ultraviolet B ◽  
In Vitro Tests ◽  
Antioxidant Defence ◽  
Experimental Conditions ◽  
Uvb Irradiation

External administration of hydrogen gas (H2) benefits plants from multiple environmental stimuli. However, the physiological significance and molecular mechanism of H2 in ultraviolet-B (UVB) irradiation are largely unexplored. Here, the biological function of H2 in the regulation of plant UVB-tolerance was investigated by using hydrogen-rich water (HRW). Results showed that the exposure of alfalfa seedlings to UVB irradiation increased endogenous H2 production. Pretreatment with HRW mimicked the UVB-induced endogenous H2 production. Corresponding UVB-triggered toxic symptoms, in terms of lipid peroxidation and overproduction of reactive oxygen species (ROS), as well as the subsequent growth inhibition, were markedly mitigated. Metabolic profiling analysis by using ultra performance liquid chromatography-mass spectrometric (UPLC-MS), identified 40 (iso)flavonoids in UVB-treated alfalfa plants, with 22 kinds was increased by HRW. These changes resulted in the alternation of (iso)flavonoids profile, with the effective promotion of isoflavone and flavanone subfamilies in particular. These compounds included afromosin, afromosin 7-O-β-D-glucoside-malonate, daidzein, formononetin 7-O-β-D-glucoside-6ʹʹ-O-malonate, garbanzol, matteucin and naringenin. In vitro tests further showed that the HRW-modulated (iso)flavonoids profile upon UVB stress possessed advanced ROS-quenching and antioxidant capacities under our experimental conditions. Meanwhile, UVB-triggered upregulation in the transcription levels of (iso)flavonoids biosynthetic-related genes were substantially strengthened by HRW. The activities and related transcripts of representative antioxidant enzymes were also induced. Taken together, our findings indicate that HRW confers tolerance to UVB-induced oxidative damage partially by the manipulation of (iso)flavonoids metabolism and antioxidant defence in Medicago sativa L.

Evaluation of geochemical behavior and heavy metal distribution of sediments: The case study of the Tirumalairajan river estuary, southeast coast of India

2015 ◽  
Vol 30 (1) ◽  
pp. 28-38 ◽  
Author(s):  
Senapathi VENKATRAMANAN ◽  
Sang-yong CHUNG ◽  
Thirunavukkarasu RAMKUMAR ◽  
Gopalakrishnan GNANACHANDRASAMY ◽  
Tae Hyung KIM
Keyword(s):  
Heavy Metal ◽  
River Estuary ◽  
Metal Distribution ◽  
Southeast Coast Of India ◽  
Geochemical Behavior ◽  
Heavy Metal Distribution ◽  
Southeast Coast
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