Efficient Regeneration Potential is Closely Related to Auxin Exposure Time and Catalase Metabolism During the Somatic Embryogenesis of Immature Embryos in Triticum aestivum L

Regeneration of cultured tissue is a prerequisite of Agrobacterium- and biolistic-mediated plant transformation. In this study, an efficient protocol for improving wheat (Triticum aestivum L.) immature embryo regeneration was developed. Based on the statistical analysis of embryogenic callus inducti...

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Veröffentlicht in:Molecular biotechnology 2013-06, Vol.54 (2), p.451-460
Hauptverfasser: She, Maoyun, Yin, Guixiang, Li, Jiarui, Li, Xing, Du, Lipu, Ma, Wujun, Ye, Xingguo
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container_issue 2
container_start_page 451
container_title Molecular biotechnology
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creator She, Maoyun
Yin, Guixiang
Li, Jiarui
Li, Xing
Du, Lipu
Ma, Wujun
Ye, Xingguo
description Regeneration of cultured tissue is a prerequisite of Agrobacterium- and biolistic-mediated plant transformation. In this study, an efficient protocol for improving wheat (Triticum aestivum L.) immature embryo regeneration was developed. Based on the statistical analysis of embryogenic callus induction efficiency, green spot differentiation efficiency, and plant regeneration efficiency from five wheat accessions, improved culture conditions were found to be more effective for embryogenic callus production than the traditional conditions. Using semi-quantitative reverse transcription polymerase chain reaction, a candidate gene, designated as TaCAT1, which encodes a catalase was identified to have a significant correlation with high-regeneration trait of wheat immature embryos. Three amino acid substitutions were found in TaCAT1 protein between high- and low-regeneration wheat accessions. Hydrogen peroxide content in the cultured calli increased from day 5 to 15, and then decreased sharply on day 20, followed by a second peak on day 25 during regeneration stage. Furthermore, a 3,500-bp 5′ flanking region upstream of the first codon ATG of TaCAT1 was isolated using inverse polymerase chain reaction. In silico, analysis revealed that the TaCAT1 promoter contained two regulatory motifs associated with responses to auxin.
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In this study, an efficient protocol for improving wheat (Triticum aestivum L.) immature embryo regeneration was developed. Based on the statistical analysis of embryogenic callus induction efficiency, green spot differentiation efficiency, and plant regeneration efficiency from five wheat accessions, improved culture conditions were found to be more effective for embryogenic callus production than the traditional conditions. Using semi-quantitative reverse transcription polymerase chain reaction, a candidate gene, designated as TaCAT1, which encodes a catalase was identified to have a significant correlation with high-regeneration trait of wheat immature embryos. Three amino acid substitutions were found in TaCAT1 protein between high- and low-regeneration wheat accessions. Hydrogen peroxide content in the cultured calli increased from day 5 to 15, and then decreased sharply on day 20, followed by a second peak on day 25 during regeneration stage. Furthermore, a 3,500-bp 5′ flanking region upstream of the first codon ATG of TaCAT1 was isolated using inverse polymerase chain reaction. In silico, analysis revealed that the TaCAT1 promoter contained two regulatory motifs associated with responses to auxin.</abstract><cop>New York</cop><pub>Springer-Verlag</pub><pmid>22815184</pmid><doi>10.1007/s12033-012-9583-y</doi><tpages>10</tpages></addata></record>
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subjects Amino Acid Substitution
Amino acids
auxins
Biochemistry
Biological Techniques
Biotechnology
callus
catalase
Catalase - metabolism
Cell Biology
Chemistry
Chemistry and Materials Science
Crop science
Embryonic growth stage
Embryos
Enzymes
exposure duration
genes
Hormones
Human Genetics
Hydrogen peroxide
Hydrogen Peroxide - metabolism
Indoleacetic Acids - pharmacology
Metabolism
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Somatic Embryogenesis Techniques - methods
Promoter Regions, Genetic - genetics
Protein Science
Regeneration - genetics
reverse transcriptase polymerase chain reaction
Seeds - embryology
Seeds - genetics
Seeds - metabolism
somatic embryogenesis
Statistical analysis
Tissue Culture Techniques - methods
Triticum - embryology
Triticum - genetics
Triticum - metabolism
Triticum aestivum
Wheat
title Efficient Regeneration Potential is Closely Related to Auxin Exposure Time and Catalase Metabolism During the Somatic Embryogenesis of Immature Embryos in Triticum aestivum L
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