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Effect of nitrogen source on growth and morphogenesis of three micropropagated potato cultivars

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Summary

Different nitrogen sources (NO3 −, NH4 +, glutamic acid and their combinations) influenced the growth and morphogenic responses (node number, shoot length, and stem, leaf and root dry weight) of three micropropagated potato cultivars (Spunta, Kennebec, Huinkul).

Addition of reduced nitrogen (NH4 + or glutamic acid) in a nitrate medium increased shoot length and leaf number. The large increase in growth in plants fed with NO3 −, NH4 + could be explained by higher organic nitrogen content and enhanced dry matter partition to the shoot. This suggests that reduced nitrogen source is required, at least as a supplement to NO3 −, to enhance N assimilation and growth.

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Authors and Affiliations

  1. Laboratorio de Fisiología Vegetal, Facultad de Ciencias Agropecuarias, Universidad Nacional de Córdoba, Av. Valparaiso s/n. Ciudad Universitaria, 5000, Córdoba, Argentina

    A. de L. Avila, S. M. Pereyra, D. J. Collino & J. A. Argüello

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  1. A. de L. Avila
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  2. S. M. Pereyra
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  3. D. J. Collino
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  4. J. A. Argüello
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Avila, A.d.L., Pereyra, S.M., Collino, D.J. et al. Effect of nitrogen source on growth and morphogenesis of three micropropagated potato cultivars. Potato Res 37, 161–168 (1994). https://doi.org/10.1007/BF02358717

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  • DOI: https://doi.org/10.1007/BF02358717

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