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The Nature of Root-Promoting Substances in Lycopersicon esculentum Seedlings.
- Source :
- Physiologia Plantarum; 1972, Vol. 26 Issue 3, p306-309, 4p
- Publication Year :
- 1972
-
Abstract
- Determination of the organ sites and chemical nature of root-promoting substances in Lycopersicon esculentum seedlings was made. Results of organ excision indicated that the young cotyledons were the primary site of root-promoting substances. As the cotyledon matured, its root-promoting activity decreased while that of the developing plumular leaves increased. Application of 2,3,5-triiodobenzoic acid (TIBA) at 10 <superscript>3</superscript> M in lanolin to the hypocotyl below the cotyledonary node significantly prevented root formation. Bioassay, using a new tomato rooting test, of the basic, acidic and bound fractions of the cotyledon extracts after paper chromatography showed biological activities in all three fractions. Gas-liquid chromatography of selected active regions of the paper chromatogram resulted in a partial tentative identification of indolepropionic acid, 5-methylindole, 5-hydroxyindole and 3-indoleacetonitrile. The combined evidence indicated that the root-promoting substances in tomato seedlings resemble auxin compounds. [ABSTRACT FROM AUTHOR]
- Subjects :
- PLANT roots
PLANT growth
SEEDLINGS
BIOLOGICAL assay
AUXIN
Subjects
Details
- Language :
- English
- ISSN :
- 00319317
- Volume :
- 26
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Physiologia Plantarum
- Publication Type :
- Academic Journal
- Accession number :
- 13085250
- Full Text :
- https://doi.org/10.1111/j.1399-3054.1972.tb01113.x