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Molecular regulation of seed development and strategies for engineering seed size in crop plants

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Abstract

Seed, a unit of plant reproduction, is an important source of food, feed, and feedstock. Seed size is a key component of a seed yield trait. Improving seed size has been one of the primary goals of plant breeding since the domestication of crop plants. In the last one and half decade, molecular studies on seed development have gained a great importance in plant research and as a result, a number of molecular regulators of seed size have been identified in the model plant Arabidopsis and some of the crop plants. Seed development is a complex process involving a coordinated growth of maternal and zygotic tissues, which is regulated by the integrated action of transcriptional, epigenetic, hormonal, peptide and sugar signaling regulators. In this review, the role of different transcriptional, epigenetic, hormonal, peptide and sugar signaling regulators in seed development pathways are discussed in detail followed by a brief description of the application of the knowledge gained over the years on molecular regulation of seed development for engineering seed size in crop plants using novel transgenic and recently evolved new breeding strategies such as genome editing.

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Acknowledgements

The author acknowledges Dr. S. R. Bhat, Emeritus Scientist, ICAR-NRCPB, New Delhi, for his guidance and useful discussion on the topic during Ph.D. research work, and Indian Council of Agricultural Research for the financial assistance.

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    Siddanna Savadi

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Savadi, S. Molecular regulation of seed development and strategies for engineering seed size in crop plants. Plant Growth Regul 84, 401–422 (2018). https://doi.org/10.1007/s10725-017-0355-3

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