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Research ArticleMetabolism and Enzymology
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Changes in Level and Activity of Phospholipid Transfer Protein during Maturation and Germination of Maize Seeds

Michèle Grosbois, Françoise Guerbette, Jean-Claude Kader
Michèle Grosbois
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Françoise Guerbette
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Jean-Claude Kader
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Published August 1989. DOI: https://doi.org/10.1104/pp.90.4.1560

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Abstract

The variations of the amounts of phospholipid transfer proteins (PLTP), determined by ELISA and immunoblotting methods, were followed during the maturation and germination of maize (Zea mays L.) seeds. Changes of the amounts of PLTP occur during seed maturation. The levels of PLTP, low in the first 3 weeks after fecondation, strongly raised 3 to 5 weeks after, then reached and maintained a high value (10% of total soluble proteins) during the last steps of maturation. These variations, determined by ELISA, are in accordance with the observations made by immunoblotting. Changes in phospholipid transfer activity were also found when protein extracts prepared from seeds at different stages of maturation were assayed for transfer activity. The levels of PLTP were also determined during the germination of maize seeds and the early growth of the plantlets, both in the endosperm and the aerial parts. While no major change was observed in the endosperm, a high increase in PLTP level was found in the aerial part of the plantlet, both by ELISA and immunoblotting. An enhancement of the phospholipid transfer activity was parallely observed in the protein extracts of plantlets at various stages of germination. These results are consistent with an in vivo correlation between the synthesis of phospholipid transfer protein, observed during the maturation and germination of maize seeds, and the biogenesis of membranes which involves intracellular movements of phospholipids.

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Changes in Level and Activity of Phospholipid Transfer Protein during Maturation and Germination of Maize Seeds
Michèle Grosbois, Françoise Guerbette, Jean-Claude Kader
Plant Physiology Aug 1989, 90 (4) 1560-1564; DOI: 10.1104/pp.90.4.1560

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Changes in Level and Activity of Phospholipid Transfer Protein during Maturation and Germination of Maize Seeds
Michèle Grosbois, Françoise Guerbette, Jean-Claude Kader
Plant Physiology Aug 1989, 90 (4) 1560-1564; DOI: 10.1104/pp.90.4.1560
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Plant Physiology
Vol. 90, Issue 4
August 1989
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More in this TOC Section

  • Distribution of Pyruvate Dehydrogenase Complex Activities between Chloroplasts and Mitochondria from Leaves of Different Species
  • Identification of Posttranslationally Modified 18-Kilodalton Protein from Rice as Eukaryotic Translation Initiation Factor 5A
  • Regulation of Maize Leaf Nitrate Reductase Activity Involves Both Gene Expression and Protein Phosphorylation
Show more Metabolism and Enzymology

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