Hormone symphony during root growth and development

Authors

  • Adriana Garay-Arroyo,

    Corresponding author
    1. Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, México D.F., México
    2. Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, México City, Mexico
    • Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, México D.F. 04510, México
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    • Adriana Garay-Arroyo and María de la Paz Sánchez contributed equally to this work.

  • María De La Paz Sánchez,

    1. Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, México D.F., México
    2. Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, México City, Mexico
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    • Adriana Garay-Arroyo and María de la Paz Sánchez contributed equally to this work.

  • Berenice García-Ponce,

    1. Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, México D.F., México
    2. Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, México City, Mexico
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  • Eugenio Azpeitia,

    1. Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, México D.F., México
    2. Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, México City, Mexico
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  • Elena R. Álvarez-Buylla

    Corresponding author
    1. Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, México D.F., México
    2. Centro de Ciencias de la Complejidad, Universidad Nacional Autónoma de México, México City, Mexico
    3. University of California, Berkeley. College of Natural Resources. Department of Plant and Microbial Biology, Berkeley, California
    • Laboratorio de Genética Molecular, Desarrollo y Evolución de Plantas, Instituto de Ecología, Universidad Nacional Autónoma de México, 3er Circuito Ext. Junto a J. Botánico, Ciudad Universitaria, UNAM, México D.F. 04510, México
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Abstract

Hormones regulate plant growth and development in response to external environmental stimuli via complex signal transduction pathways, which in turn form complex networks of interaction. Several classes of hormones have been reported, and their activity depends on their biosynthesis, transport, conjugation, accumulation in the vacuole, and degradation. However, the activity of a given hormone is also dependent on its interaction with other hormones. Indeed, there is a complex crosstalk between hormones that regulates their biosynthesis, transport, and/or signaling functionality, although some hormones have overlapping or opposite functions. The plant root is a particularly useful system in which to study the complex role of plant hormones in the plastic control of plant development. Physiological, cellular, and molecular genetic approaches have been used to study the role of plant hormones in root meristem homeostasis. In this review, we discuss recent findings on the synthesis, signaling, transport of hormones and role during root development and examine the role of hormone crosstalk in maintaining homeostasis in the apical root meristem. Developmental Dynamics, 2012. © 2012 Wiley Periodicals, Inc.

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