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Comparative proteomic analyses provide new insights into low phosphorus stress responses in maize leaves

Phosphorus deficiency limits plant growth and development. To better understand the mechanisms behind how maize responds to phosphate stress, we compared the proteome analysis results of two groups of maize leaves that were treated separately with 1,000 µM (control, +P) and 5 µM of KH2PO4 (intervent...

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Published in:PloS one 2014-05, Vol.9 (5), p.e98215-e98215
Main Authors: Zhang, Kewei, Liu, Hanhan, Tao, Peilin, Chen, Huan
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description Phosphorus deficiency limits plant growth and development. To better understand the mechanisms behind how maize responds to phosphate stress, we compared the proteome analysis results of two groups of maize leaves that were treated separately with 1,000 µM (control, +P) and 5 µM of KH2PO4 (intervention group, -P) for 25 days. In total, 1,342 protein spots were detected on 2-DE maps and 15.43% had changed (P
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To better understand the mechanisms behind how maize responds to phosphate stress, we compared the proteome analysis results of two groups of maize leaves that were treated separately with 1,000 µM (control, +P) and 5 µM of KH2PO4 (intervention group, -P) for 25 days. In total, 1,342 protein spots were detected on 2-DE maps and 15.43% had changed (P&lt;0.05; ≥1.5-fold) significantly in quantity between the +P and -P groups. These proteins are involved in several major metabolic pathways, including photosynthesis, carbohydrate metabolism, energy metabolism, secondary metabolism, signal transduction, protein synthesis, cell rescue and cell defense and virulence. The results showed that the reduction in photosynthesis under low phosphorus treatment was due to the down-regulation of the proteins involved in CO2 enrichment, the Calvin cycle and the electron transport system. Electron transport and photosynthesis restrictions resulted in a large accumulation of peroxides. Maize has developed many different reactive oxygen species (ROS) scavenging mechanisms to cope with low phosphorus stress, including up-regulating its antioxidant content and antioxidase activity. After being subjected to phosphorus stress over a long period, maize may increase its internal phosphorus utilization efficiency by altering photorespiration, starch synthesis and lipid composition. 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deficiency</subject><subject>Photorespiration</subject><subject>Photosynthesis</subject><subject>Physiological aspects</subject><subject>Physiology</subject><subject>Plant biochemistry</subject><subject>Plant growth</subject><subject>Plant Leaves - metabolism</subject><subject>Polyamines</subject><subject>Potassium phosphate</subject><subject>Potassium phosphates</subject><subject>Protein biosynthesis</subject><subject>Protein synthesis</subject><subject>Protein turnover</subject><subject>Proteins</subject><subject>Proteomics - methods</subject><subject>Reactive oxygen species</subject><subject>Reactive Oxygen Species - metabolism</subject><subject>Starch</subject><subject>Starch - biosynthesis</subject><subject>Starvation</subject><subject>Stress</subject><subject>Stress (Psychology)</subject><subject>Stress, Physiological</subject><subject>Stresses</subject><subject>Studies</subject><subject>Sucrose</subject><subject>Transcription factors</subject><subject>Transduction</subject><subject>Virulence</subject><subject>Zea mays - 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To better understand the mechanisms behind how maize responds to phosphate stress, we compared the proteome analysis results of two groups of maize leaves that were treated separately with 1,000 µM (control, +P) and 5 µM of KH2PO4 (intervention group, -P) for 25 days. In total, 1,342 protein spots were detected on 2-DE maps and 15.43% had changed (P&lt;0.05; ≥1.5-fold) significantly in quantity between the +P and -P groups. These proteins are involved in several major metabolic pathways, including photosynthesis, carbohydrate metabolism, energy metabolism, secondary metabolism, signal transduction, protein synthesis, cell rescue and cell defense and virulence. The results showed that the reduction in photosynthesis under low phosphorus treatment was due to the down-regulation of the proteins involved in CO2 enrichment, the Calvin cycle and the electron transport system. Electron transport and photosynthesis restrictions resulted in a large accumulation of peroxides. Maize has developed many different reactive oxygen species (ROS) scavenging mechanisms to cope with low phosphorus stress, including up-regulating its antioxidant content and antioxidase activity. After being subjected to phosphorus stress over a long period, maize may increase its internal phosphorus utilization efficiency by altering photorespiration, starch synthesis and lipid composition. These results provide important information about how maize responds to low phosphorus stress.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24858307</pmid><doi>10.1371/journal.pone.0098215</doi><oa>free_for_read</oa></addata></record>
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subjects Antioxidants
Arabidopsis
Arabidopsis thaliana
Biology and Life Sciences
Biosynthesis
Calvin cycle
Carbohydrate metabolism
Carbohydrates
Carbon dioxide
Carbon Dioxide - metabolism
Corn
Education
Electron transport
Energy metabolism
Engineering
Gene expression
Germplasm
Humidity
Hydrologic cycle
Laboratories
Leaves
Life sciences
Lipid composition
Lipid Metabolism
Lipids
Metabolic pathways
Metabolism
Oryza
Oxygen
Oxygen Consumption
Peroxides
Phosphates
Phosphorus
Phosphorus - deficiency
Photorespiration
Photosynthesis
Physiological aspects
Physiology
Plant biochemistry
Plant growth
Plant Leaves - metabolism
Polyamines
Potassium phosphate
Potassium phosphates
Protein biosynthesis
Protein synthesis
Protein turnover
Proteins
Proteomics - methods
Reactive oxygen species
Reactive Oxygen Species - metabolism
Starch
Starch - biosynthesis
Starvation
Stress
Stress (Psychology)
Stress, Physiological
Stresses
Studies
Sucrose
Transcription factors
Transduction
Virulence
Zea mays - metabolism
title Comparative proteomic analyses provide new insights into low phosphorus stress responses in maize leaves
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