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Review ARTICLE Provisionally accepted The full-text will be published soon. Notify me

Front. Plant Sci. | doi: 10.3389/fpls.2019.01289

Peg Biology: Deciphering the Molecular Regulations Involved During Peanut Peg Development

 Rakesh Kumar1,  Manish K. Pandey1, Suruchi Roychoudhry2,  Harsh Nayyar3, Stefan Kepinski2 and  Rajeev K. Varshney4*
  • 1International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), India
  • 2Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, United Kingdom
  • 3Department of Botany, Panjab University, Chandigarh, India
  • 4Applied Genomics, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), India

Peanut or groundnut is one of the most important legume crops with high protein and oil content. The high nutritional qualities of peanut and its multiple usage have made it an indispensable component of our daily life, in both confectionary and therapeutic food industries. Given the socio-economic significance of peanut, understanding its developmental biology is important in providing a molecular framework to support breeding activities. In peanut, the formation and directional growth of a specialized reproductive organ called a peg, or gynophore, is especially relevant in genetic improvement. Several studies have indicated that peanut yield can be improved by improving reproductive traits including peg development. Therefore, we aim to identify unifying principles for the genetic control, underpinning molecular and physiological basis of peg development for devising appropriate strategy for peg improvement. This review discusses the current understanding of the molecular aspects of peanut peg development citing several studies explaining the key mechanisms. Deciphering and integrating recent transcriptomic, proteomic, and miRNA-regulomic studies provide a new perspective for understanding the regulatory events of peg development that participate in pod formation and thus control yield.

Keywords: Embryo abortion, Abscisic Acid, peanut, Gravitropism, Phototropism, hormone cross-talk, miRNA-regulomics, molecular omics

Received: 10 Jul 2019; Accepted: 17 Sep 2019.

Copyright: © 2019 Kumar, Pandey, Roychoudhry, Nayyar, Kepinski and Varshney. 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(s) 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: Dr. Rajeev K. Varshney, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Applied Genomics, Patancheru, 502324, AP, India, r.k.varshney@cgiar.org