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Open AccessReview

Genome Editing in Plants: Exploration of Technological Advancements and Challenges

1
National Agri-Food Biotechnology Institute (NABI), Mohali Punjab 140306, India
2
Department of Agronomy and Plant Genetics University of Minnesota, St. Paul, MN 55108-6026, USA
3
Department of Health Management and Informatics; Informatics Institute; Christopher S Bond Life Science Center, University of Missouri, Columbia, MO 65211-7310, USA
*
Authors to whom correspondence should be addressed.
Cells 2019, 8(11), 1386; https://doi.org/10.3390/cells8111386
Received: 31 August 2019 / Revised: 4 October 2019 / Accepted: 12 October 2019 / Published: 4 November 2019
(This article belongs to the Special Issue Genome Editing Systems, Methods, Techniques and Their Application)
Genome-editing, a recent technological advancement in the field of life sciences, is one of the great examples of techniques used to explore the understanding of the biological phenomenon. Besides having different site-directed nucleases for genome editing over a decade ago, the CRISPR/Cas (clustered regularly interspaced short palindromic repeats/CRISPR-associated protein) based genome editing approach has become a choice of technique due to its simplicity, ease of access, cost, and flexibility. In the present review, several CRISPR/Cas based approaches have been discussed, considering recent advances and challenges to implicate those in the crop improvement programs. Successful examples where CRISPR/Cas approach has been used to improve the biotic and abiotic stress tolerance, and traits related to yield and plant architecture have been discussed. The review highlights the challenges to implement the genome editing in polyploid crop plants like wheat, canola, and sugarcane. Challenges for plants difficult to transform and germline-specific gene expression have been discussed. We have also discussed the notable progress with multi-target editing approaches based on polycistronic tRNA processing, Csy4 endoribonuclease, intron processing, and Drosha ribonuclease. Potential to edit multiple targets simultaneously makes it possible to take up more challenging tasks required to engineer desired crop plants. Similarly, advances like precision gene editing, promoter bashing, and methylome-editing will also be discussed. The present review also provides a catalog of available computational tools and servers facilitating designing of guide-RNA targets, construct designs, and data analysis. The information provided here will be useful for the efficient exploration of technological advances in genome editing field for the crop improvement programs. View Full-Text
Keywords: CRISPR/Cas; multi-target editing; promoter bashing; methylome-editing; biotic and abiotic stress tolerance; plant transformation CRISPR/Cas; multi-target editing; promoter bashing; methylome-editing; biotic and abiotic stress tolerance; plant transformation
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Vats, S.; Kumawat, S.; Kumar, V.; Patil, G.B.; Joshi, T.; Sonah, H.; Sharma, T.R.; Deshmukh, R. Genome Editing in Plants: Exploration of Technological Advancements and Challenges. Cells 2019, 8, 1386.

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