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Correlations between polyamine ratios and growth patterns in seedling roots.
1Department of Biology, Yale University, New Haven, CT 06511, USA.
Plant Growth Regulation
|January 1, 1985
Summary
Plant polyamine levels, including putrescine, spermidine, and spermine, correlate with root and shoot growth. A potential block in putrescine conversion may regulate cell division and elongation.
Area of Science:
- Plant Physiology
- Biochemistry
Background:
- Polyamines are essential for plant growth and development.
- Specific polyamine levels and ratios change during plant organ development.
Purpose of the Study:
- To quantify polyamine levels in various plant seedling tissues.
- To investigate the relationship between polyamine profiles and plant growth stages.
Main Methods:
- Quantification of putrescine, cadaverine, spermidine, and spermine.
- Analysis of polyamine content in roots, coleoptiles, and internodes of pea, tomato, millet, and corn.
Main Results:
- Putrescine levels increased with root elongation, mirroring growth curves.
- Spermidine and spermine were highest in young cells and decreased with age.
- Putrescine/spermidine ratios increased with age in pea internodes and corn coleoptiles.
Conclusions:
- Polyamine dynamics are linked to cell division and elongation.
- A potential metabolic block in converting putrescine to spermidine may control cell growth transitions.