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Front. Plant Sci. | doi: 10.3389/fpls.2018.00143

Proteomics of Maize Root Development

  • 1INRES Crop Functional Genomics, University of Bonn, Germany
  • 2INRES Crop Functional Genomics, University of Bonn, Germany

Maize forms a complex root system with structurally and functionally diverse root types that are formed at different developmental stages to extract water and mineral nutrients from soil. In recent years proteomics has been intensively applied to identify proteins involved in shaping the three-dimensional architecture and regulating the function of the maize root system. With the help of developmental mutants, proteomic changes during the initiation and emergence of shoot-borne, lateral and seminal roots have been examined. Furthermore, root hairs were surveyed to understand the proteomic changes during the elongation of these single cell type structures. In addition, primary roots have been used to study developmental changes of the proteome but also to investigate the proteomes of distinct tissues such as the meristematic zone, the elongation zone as well as stele and cortex of the differentiation zone. Moreover, subcellular fractions of the primary root including cell walls, plasma membranes and secreted mucilage have been analyzed. Finally, the superior vigor of hybrid seedling roots compared to their parental inbred lines was studied on the proteome level. In summary, these studies provide novel insights into the complex proteomic interactions of the elaborate maize root system during development.

Keywords: heterosis, lateral root, Maize, Proteomics, primary root, root hairs, Seminal root, Shoot-borne root

Received: 18 Dec 2017; Accepted: 25 Jan 2018.

Edited by:

Ive De Smet, Flanders Institute for Biotechnology, Belgium

Reviewed by:

Jian Xu, National University of Singapore, Singapore
Raffaele Dello Ioio, Sapienza Università di Roma, Italy  

Copyright: © 2018 Hochholdinger, Marcon, Baldauf, Frey and Yu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Frank Hochholdinger, University of Bonn, INRES Crop Functional Genomics, Bonn, Germany, hochholdinger@uni-bonn.de