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Auxin: a master regulator in plant root development

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Abstract

The demand for increased crop productivity and the predicted challenges related to plant survival under adverse environmental conditions have renewed the interest in research in root biology. Various physiological and genetic studies have provided ample evidence in support of the role of plant growth regulators in root development. The biosynthesis and transport of auxin and its signaling play a crucial role in controlling root growth and development. The univocal role of auxin in root development has established it as a master regulator. Other plant hormones, such as cytokinins, brassinosteroids, ethylene, abscisic acid, gibberellins, jasmonic acid, polyamines and strigolactones interact either synergistically or antagonistically with auxin to trigger cascades of events leading to root morphogenesis and development. In recent years, the availability of biological resources, development of modern tools and experimental approaches have led to the advancement of knowledge in root development. Research in the areas of hormone signal perception, understanding network of events involved in hormone action and the transport of plant hormones has added a new dimension to root biology. The present review highlights some of the important conceptual developments in the interplay of auxin and other plant hormones and associated downstream events affecting root development.

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  1. Department of Biotechnology, Guru Nanak Dev University, Amritsar, 143005, India

    Shivani Saini, Isha Sharma, Navdeep Kaur & Pratap Kumar Pati

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  1. Shivani Saini
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Correspondence to Pratap Kumar Pati.

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Communicated by P. Kumar.

A contribution to the Special Issue: Plant Hormone Signaling.

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Saini, S., Sharma, I., Kaur, N. et al. Auxin: a master regulator in plant root development. Plant Cell Rep 32, 741–757 (2013). https://doi.org/10.1007/s00299-013-1430-5

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