No Statistic Correlation between Superoxide Dismutase and Peroxidase Activities and Aluminum-Induced Lipid Peroxidation in Maize, Implying Limited Roles of Both Enzymes in Prevention against Aluminum-Induced Lipid Peroxidation

Wang, Liang; Zhao, Jianyu; Wu, San-Min; Pan, Jiang-long; Huang, Zhangbao; Wu, Z. T.; Fan, Xian‐Wei; Li, Youzhi

doi:10.4236/ajps.2011.22017

Cited by 3 publications

(3 citation statements)

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“…Interestingly, excessive Cu (Bona et al, 2007), Cr (Sharmin et al, 2012) treatments or B deficiency (Alves et al, 2011) lead to decreased abundance of APX and POD. The detected suppression of POD is in accordance with the decrease in POD reported in maize roots treated with Al (Wang et al, 2011). …”

Section: Plant Strategies Of Hm Tolerancesupporting

confidence: 89%

Contribution of proteomic studies towards understanding plant heavy metal stress response

2013

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Modulation of plant proteome composition is an inevitable process to cope with the environmental challenges including heavy metal (HM) stress. Soil and water contaminated with hazardous metals not only cause permanent and irreversible health problems, but also result substantial reduction in crop yields. In course of time, plants have evolved complex mechanisms to regulate the uptake, mobilization, and intracellular concentration of metal ions to alleviate the stress damages. Since, the functional translated portion of the genome plays an essential role in plant stress response, proteomic studies provide us a finer picture of protein networks and metabolic pathways primarily involved in cellular detoxification and tolerance mechanism. In the present review, an attempt is made to present the state of the art of recent development in proteomic techniques and significant contributions made so far for better understanding the complex mechanism of plant metal stress acclimation. Role of metal stress-related proteins involved in antioxidant defense system and primary metabolism is critically reviewed to get a bird’s-eye view on the different strategies of plants to detoxify HMs. In addition to the advantages and disadvantages of different proteomic methodologies, future applications of proteome study of subcellular organelles are also discussed to get the new insights into the plant cell response to HMs.

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Section: Plant Strategies Of Hm Tolerancesupporting

confidence: 89%

Contribution of proteomic studies towards understanding plant heavy metal stress response

2013

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“…In maize, Al stress led to a significant decrease of SOD and peroxidase (POD) activity and Al accumulation (Wang et al . ). The reduction in SOD activity detected in maize roots treated with Al agrees with the down‐regulation of ScMnSOD and ScCu/ZnSOD genes found in the tolerant Petkus rye roots.…”

Section: Discussionmentioning

confidence: 97%

“…In contrast, enzyme activity of SOD and POD were much lower in maize roots than in leaves, and some isoforms were differentially expressed in a tissue‐specific manner in maize (Wang et al . ). These authors suggest that the high sensitivity of maize to Al is partly associated with much lower activity of both enzymes in roots.…”

Section: Discussionmentioning

confidence: 97%

The role of two superoxide dismutase mRNAs in rye aluminium tolerance

et al. 2015

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Aluminium (Al) is the main factor that limits crop production in acidic soils. There is evidence that antioxidant enzymes such as superoxide dismutase (SOD) play a key role against Al-induced oxidative stress in several plant species. Rye is one of the most Al-tolerant cereals and exudes both citrate and malate from the roots in response to Al. The role of SOD against Al-induced oxidative stress has not been studied in rye. Al accumulation, lipid peroxidation, H₂O₂ production and cell death were significantly higher in sensitive than in tolerant rye cultivars. Also, we characterised two genes for rye SOD: ScCu/ZnSOD and ScMnSOD. These genes were located on the chromosome arms of 2RS and 3RL, respectively, and their corresponding hypothetical proteins were putatively classified as cytosolic and mitochondrial, respectively. The phylogenetic relationships indicate that the two rye genes are orthologous to the corresponding genes of other Poaceae species. In addition, we studied Al-induced changes in the expression profiles of mRNAs from ScCu/ZnSOD and ScMnSOD in the roots and leaves of tolerant Petkus and sensitive Riodeva rye. These genes are mainly expressed in roots in both ryes, their repression being induced by Al. The tolerant cultivar has more of both mRNAs than the sensitive line, indicating that they are probably involved in Al tolerance.

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Grain yield enhancement through fungicide application on maize hybrids with different susceptibility to northern corn leaf blight

Testa¹,

Reyneri²,

Cardinale³

et al. 2015

Cereal Research Communications

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Foliar fungicides are widely used to control pests on several crops and, from mid-2000s, have become more common on maize. The yield advantages derived from foliar fungicides on maize, as for other crops, could be related not only to the direct control of the disease, but also to physiological effects on the plant. The aim of the research was to evaluate the response of maize to the application of an azoxystrobin and propiconazole mixture. The fungicide was applied to hybrids with different susceptibility to northern corn leaf blight (NCLB) foliar disease at the beginning of stem elongation or at the tassel emergence stage. The best application timing resulted to be at the tassel emergence stage for both pathogen control and grain yield. The treatment effectively controlled disease development on the two hybrids susceptible to NCLB. However, the yield of the moderately-resistant hybrid increased unexpectedly to a comparable extent, even though no significant fungal containment was detected from a visual inspection. The peroxidase and superoxide dismutase activity, the protein leaf content and the translocation efficiency of carbohydrates from the leaf to the ear were not influenced by the fungicide treatments, differently from what had been previously shown on wheat. The authors suggest that rather than the improved metabolism of the reactive oxygen species, the positive effect of the fungicide on the moderately-resistant hybrid is due to other physiological mechanisms. It is hypothesized that the fungicide leads to better yields as it prevents the allocation of metabolic resources to actively defend against the pathogen.

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No Statistic Correlation between Superoxide Dismutase and Peroxidase Activities and Aluminum-Induced Lipid Peroxidation in Maize, Implying Limited Roles of Both Enzymes in Prevention against Aluminum-Induced Lipid Peroxidation

Cited by 3 publications

References 38 publications

Contribution of proteomic studies towards understanding plant heavy metal stress response

Contribution of proteomic studies towards understanding plant heavy metal stress response

The role of two superoxide dismutase mRNAs in rye aluminium tolerance

Grain yield enhancement through fungicide application on maize hybrids with different susceptibility to northern corn leaf blight

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