Abstract
Concentrations of abscisic acid (ABA) and indole-3-acetic acid (IAA) in the second most recently expanded trifoliolate leaf were determined during reproductive development of soybean (Glycine max [L.] Merr cv `Chippewa 64'). The concentration of ABA in leaves was constant during most of the seed filling period until the seeds began to dry. The concentration of IAA in the leaves decreased throughout development. Removal of pods 36 hours prior to sampling resulted in increased concentrations of ABA in leaves during the period of rapid pod filling but had little effect on the concentration of IAA in leaves. ABA appears to accumulate in leaves after fruit removal only when fruits represent the major sink for photosynthate.
ABA and IAA moving acropetally and basipetally in petioles of soybean were estimated using a phloem exudation technique. ABA was found to move mostly in the basipetal direction in petioles (away from laminae). IAA, primarily in the form of ester conjugate(s), was found to be moving acropetally (toward laminae) in petioles. The highest amount of IAA ester(s) was found in petiole exudate during the mid and late stages of seed filling. Removal of fruits 36 hours prior to exudation reduced the amount of IAA ester recovered in exudate, suggesting that fruits were a source of the IAA conjugate in petiole exudate.
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Selected References
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- Bandurski R. S., Schulze A. Concentration of Indole-3-acetic Acid and Its Derivatives in Plants. Plant Physiol. 1977 Aug;60(2):211–213. doi: 10.1104/pp.60.2.211. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Ciha A. J., Brenner M. L., Brun W. A. Rapid separation and quantification of abscisic Acid from plant tissues using high performance liquid chromatography. Plant Physiol. 1977 May;59(5):821–826. doi: 10.1104/pp.59.5.821. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Fellows R. J., Egli D. B., Leggett J. E. A Pod Leakage Technique for Phloem Translocation Studies in Soybean (Glycine max [L.] Merr.). Plant Physiol. 1978 Nov;62(5):812–814. doi: 10.1104/pp.62.5.812. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hein M. B., Brenner M. L., Brun W. A. Concentrations of Abscisic Acid and Indole-3-Acetic Acid in Soybean Seeds during Development. Plant Physiol. 1984 Dec;76(4):951–954. doi: 10.1104/pp.76.4.951. [DOI] [PMC free article] [PubMed] [Google Scholar]
- King R. W., Zeevaart J. A. Enhancement of Phloem exudation from cut petioles by chelating agents. Plant Physiol. 1974 Jan;53(1):96–103. doi: 10.1104/pp.53.1.96. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nowacki J., Bandurski R. S. Myo-Inositol Esters of Indole-3-acetic Acid as Seed Auxin Precursors of Zea mays L. Plant Physiol. 1980 Mar;65(3):422–427. doi: 10.1104/pp.65.3.422. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Setter T. L., Brun W. A. Abscisic Acid Translocation and Metabolism in Soybeans following Depodding and Petiole Girdling Treatments. Plant Physiol. 1981 Apr;67(4):774–779. doi: 10.1104/pp.67.4.774. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Setter T. L., Brun W. A., Brenner M. L. Effect of obstructed translocation on leaf abscisic Acid, and associated stomatal closure and photosynthesis decline. Plant Physiol. 1980 Jun;65(6):1111–1115. doi: 10.1104/pp.65.6.1111. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sweetser P. B., Swartzfager D. G. Indole-3-acetic Acid Levels of Plant Tissue as Determined by a New High Performance Liquid Chromatographic Method. Plant Physiol. 1978 Feb;61(2):254–258. doi: 10.1104/pp.61.2.254. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tamas I. A., Engels C. J. Role of indoleacetic Acid and abscisic Acid in the correlative control by fruits of axillary bud development and leaf senescence. Plant Physiol. 1981 Aug;68(2):476–481. doi: 10.1104/pp.68.2.476. [DOI] [PMC free article] [PubMed] [Google Scholar]