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. 1984 Jun;75(2):311–317. doi: 10.1104/pp.75.2.311

Effects of Pod Removal on Metabolism and Senescence of Nodulating and Nonnodulating Soybean Isolines

I. Metabolic Constituents

Steven J Crafts-Brandner 1,2,1, Frederick E Below 1,2, James E Harper 1,2, Richard H Hageman 1,2
PMCID: PMC1066903  PMID: 16663617

Abstract

Field studies were conducted in 1981 and 1982 to ascertain the effects of pod removal on senescence of nodulating and nonnodulating isolines of soybean (Glycine max [L.] Merr. cv Harosoy) plants. Specifically, the test hypothesis was that nodules act as a nitrogen source and a carbohydrate sink which would in turn prevent or delay senescence in the absence of pods. Senescence was judged by changes in metabolite levels, in dry matter accumulation, and by visual observation.

For both nodulated and nonnodulated plants, pod removal had no effect on the magnitude or rate of dry matter and reduced-N accumulation by whole plants. Phosphorus accumulation was significantly less in both nodulated- and nonnodulated-depodded plants, compared with respective control plants with pods. These data suggested a role for pods in phosphorus uptake. Accumulation of dry matter, reduced N, and phosphorus ceased at approximately the same time for all treatments.

Pod removal did affect partitioning of plant constitments, with leaves and stems of depodded plants serving as a major alternate sink for accumulation of dry matter, reduced N, phosphorus, and nonstructural carbohydrates (primarily starch). While depodded plants eventually lost a significant amount of leaves, leaf drop was delayed relative to plants with pods; and depodded plants still retained some green leaves at 2 weeks past grain maturity of control (podded) plants.

The results indicated that senescence patterns of soybean plants were the same for nodulated and nonnodulated plants, and that pods did not control the initiation of senescence, but rather altered the partitioning of plant constituents and the visual manifestations of senescence.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Allison J. C., Weinmann H. Effect of absence of developing grain on carbohydrate content and senescence of maize leaves. Plant Physiol. 1970 Sep;46(3):435–436. doi: 10.1104/pp.46.3.435. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Christensen L. E., Below F. E., Hageman R. H. The effects of ear removal on senescence and metabolism of maize. Plant Physiol. 1981 Nov;68(5):1180–1185. doi: 10.1104/pp.68.5.1180. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Crafts-Brandner S. J., Below F. E., Harper J. E., Hageman R. H. Differential Senescence of Maize Hybrids following Ear Removal : I. Whole Plant. Plant Physiol. 1984 Feb;74(2):360–367. doi: 10.1104/pp.74.2.360. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Crafts-Brandner S. J., Below F. E., Harper J. E., Hageman R. H. Effects of Pod Removal on Metabolism and Senescence of Nodulating and Nonnodulating Soybean Isolines: II. Enzymes and Chlorophyll. Plant Physiol. 1984 Jun;75(2):318–322. doi: 10.1104/pp.75.2.318. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Crafts-Brandner S. J., Below F. E., Harper J. E., Hageman R. H. Metabolism of carbon and nitrogen by soybean seedlings in response to vegetative apex removal. Plant Physiol. 1983 Sep;73(1):6–10. doi: 10.1104/pp.73.1.6. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Crafts-Brandner S. J., Below F. E., Wittenbach V. A., Harper J. E., Hageman R. H. Differential Senescence of Maize Hybrids following Ear Removal : II. Selected Leaf. Plant Physiol. 1984 Feb;74(2):368–373. doi: 10.1104/pp.74.2.368. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Leopold A. C., Niedergang-Kamien E., Janick J. Experimental Modification of Plant Senescence. Plant Physiol. 1959 Sep;34(5):570–573. doi: 10.1104/pp.34.5.570. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Mondal M. H., Brun W. A., Brenner M. L. Effects of Sink Removal on Photosynthesis and Senescence in Leaves of Soybean (Glycine max L.) Plants. Plant Physiol. 1978 Mar;61(3):394–397. doi: 10.1104/pp.61.3.394. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Sinclair T. R., de Wit C. T. Photosynthate and nitrogen requirements for seed production by various crops. Science. 1975 Aug 15;189(4202):565–567. doi: 10.1126/science.189.4202.565. [DOI] [PubMed] [Google Scholar]
  10. Swank J. C., Below F. E., Lambert R. J., Hageman R. H. Interaction of carbon and nitrogen metabolism in the productivity of maize. Plant Physiol. 1982 Oct;70(4):1185–1190. doi: 10.1104/pp.70.4.1185. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Wilson R. F., Burton J. W., Buck J. A., Brim C. A. Studies on Genetic Male-Sterile Soybeans: I. Distribution of Plant Carbohydrate and Nitrogen during Development. Plant Physiol. 1978 May;61(5):838–841. doi: 10.1104/pp.61.5.838. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Wittenbach V. A. Effect of pod removal on leaf photosynthesis and soluble protein composition of field-grown soybeans. Plant Physiol. 1983 Sep;73(1):121–124. doi: 10.1104/pp.73.1.121. [DOI] [PMC free article] [PubMed] [Google Scholar]

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