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Somatic Embryogenesis: Still a Relevant Technique in Citrus Improvement
Ahmad A Omar1,2, Manjul Dutt1, Frederick G Gmitter1
1Citrus Research and Education Center, University of Florida/IFAS, Lake Alfred, FL, 33850, USA.
Somatic embryogenesis is a key plant regeneration method for citrus cultivar improvement. This biotechnology approach aids in developing disease-resistant citrus varieties and enhancing market opportunities through genetic transformation and somaclonal variation.
Area of Science:
- Plant Biotechnology
- Horticultural Science
- Agricultural Science
Background:
- The genus Citrus is globally significant for fruit production, necessitating continuous cultivar development.
- Conventional breeding methods for citrus face limitations in addressing disease resistance and market demands.
- Emerging biotechnologies, particularly those involving plant regeneration, offer solutions to overcome these limitations.
Purpose of the Study:
- To review the history and applications of somatic embryogenesis in citrus improvement.
- To discuss biotechnology-facilitated techniques like somatic hybridization, cybridization, genetic transformation, and somaclonal variation.
- To present novel protocols for plant regeneration via somatic embryogenesis, focusing on protoplast and Agrobacterium-mediated transformation.
Main Methods:
- Review of historical literature on plant somatic embryogenesis in citrus.
- Discussion of established biotechnology applications in citrus cultivar improvement.
- Presentation of new protocols for protoplast transformation and Agrobacterium-mediated transformation using embryogenic cell suspension cultures.
Main Results:
- Somatic embryogenesis is a crucial pathway for regenerating citrus plants.
- Biotechnologies like somatic hybridization, cybridization, genetic transformation, and somaclonal variation have proven applications in citrus improvement.
- Two new protocols detailing plant regeneration via somatic embryogenesis are introduced for advanced transformation techniques.
Conclusions:
- Somatic embryogenesis is vital for advancing citrus biotechnology and cultivar development.
- Emerging biotechnologies, enabled by efficient regeneration, are essential for overcoming citrus industry challenges.
- The presented protocols offer new avenues for genetic improvement and the development of superior citrus cultivars.
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