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Soluble carbohydrate content of soybean [Glycine max (L.) merr.] somatic and zygotic embryos during development

  • Physiology
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Summary

Somatic and zygotic embryos of soybean cv. Jack were analyzed for soluble carbohydrate, total lipids, and protein during development. Zygotic embryos accumulated trace amounts of fructose, galactose, and galactinol., whereas somatic embryos contained only trace amounts of galactose. Somatic embryos accumulated much higher glucose levels than zygotic embryos. Both somatic and zygotic embryos contain low levels of sucrose, myoinositol, and pinitol. Raffinose and stachyose accumulated in the late developmental stages of zygotic embryos, but only stachyose was found to accumulate in the late stage somatic embryos. Zygotic embryos contained low total lipid levels up to 50 d after flowering (DAF) and then the levels increased to 16% by 55 DAF and 21% at 65 DAF. Somatic embryos had low levels of total lipids throughout development with the maximum of only 4.7%. Soybean zygotic embryos contained about 40% protein throughout development, while the protein concentration of somatic embryos decreased from 44% to 25% as maturation approached. These studies demonstrate that the composition of Jack zygotic embryos is similar to that described for other cultivars during development while the somatic embryo composition and size is markedly different. The low somatic embryo germination often noted might be due to the abnormal development as shown by a composition different from that of mature zygotic embryos. The low concentration of the raffinose series sugars might be especially important factors.

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Authors and Affiliations

  1. Department of Crop Sciences, Edward R. Madigan Laboratory, University of Illinois, 1201 W. Gregory Drive, 61801, Urbana, Illinois

    Sermsiri Chanprame & J. M. Widholm

  2. National Center for Agricultural Utilization Research, USDA-ARS, 1815 North University Street, 61604, Peoria, Illinois

    T. M. Kuo

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  1. Sermsiri Chanprame
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  2. T. M. Kuo
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  3. J. M. Widholm
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Chanprame, S., Kuo, T.M. & Widholm, J.M. Soluble carbohydrate content of soybean [Glycine max (L.) merr.] somatic and zygotic embryos during development. In Vitro Cell.Dev.Biol.-Plant 34, 64–68 (1998). https://doi.org/10.1007/BF02823125

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  • DOI: https://doi.org/10.1007/BF02823125

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