Germination of Soybean Embryonic Axes: Nucleotide Sugar Metabolism and Initiation of Growth 1
AUTOR(ES)
Rodaway, Shirley
RESUMO
UDP-Sugars comprise the dominant class of nucleotide sugars in isolated soybean axes during early germination. While “dry” axes contain 1 nanomole per axis of UDP-sugars, further synthesis is initiated upon imbibition such that the concentration of total UDP-sugars reaches 8 nanomoles per axis or roughly 1 millimolar after 10 hours, when the axes begin to elongate. The GDP-sugars are essentially absent before imbibition, accumulate rapidly for 90 min to 173 picomoles per axis, then decrease somewhat, reattaining the earlier peak level shortly before growth begins. Meanwhile, the level of ADP-sugars is unchanged. These data indicate that the 10-hour lag period preceding axis growth does not result from a diminished ability to synthesize a major category of nucleotide sugars.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=543176Documentos Relacionados
- Purine Nucleotide Metabolism of Germinating Soybean Embryonic Axes
- Hydrogen Peroxide Metabolism in Soybean Embryonic Axes at the Onset of Germination 1
- Adenylate Metabolism of Embryonic Axes from Deteriorated Soybean Seeds
- RNA Synthesis in Germinating Embryonic Axes of Soybean and Wheat 1
- Oxidative Stress Affects [alpha]- Tocopherol Content in Soybean Embryonic Axes upon Imbibition and following Germination.
