Support role of the Citrus Core Transformation Facility remains crucial for research leading to production of Citrus plants that may be tolerant or resistant to diseases

Support role of the Citrus Core Transformation Facility remains crucial for research leading to production of Citrus plants that may be tolerant or resistant to diseases

Project: 15-033C   Year: 2018
Category: Horticultural & Management
Author: Vladimir Orbovic
Sponsor: Citrus Research and Development Foundation

This project had a single objective to assure un-interrupted production of transgenic citrus plants through the services of Citrus Transformation Facility (CTF). Continued operation of the facility was going to guarantee a foundation regarding this aspect of research for the scientific community involved in fight against huanglongbing (HLB) and citrus canker. By producing transgenic plants and bringing into life the ideas of scientists working in different laboratories, CTF would facilitate the process of search for candidate plants that would be tolerant/resistant to diseases and provide major relief for Florida Citrus Industry.�The objective of this project was successfully accomplished. Throughout the funding period of three and-a-half years, CTF operated without major interruptions and provided service in the form of production of transgenic plants. The level of production stayed at expected, satisfactory level and resulted in creation of 781 citrus plants that represent independent transgenic events. These plants belong to eight different cultivars: Duncan grapefruit, Carrizo citrange, Pineapple sweet orange, Mexican lime, Valencia sweet orange, Swingle citrumelo, Kumquat, and Pomelo.During this project, CTF worked on 103 orders that were placed by 10 clients and this group included eight faculty members based at University of Florida, one faculty from University of California and one Foundation. The number of projects for which the plants were produced was higher than the number of clients. For example, Dr. Nian Wang was one of the clients but orders from his lab were the part of at least five different projects done by his post-doctoral associates.All produced transgenic plants were associated only with research that has to do with disease resistance. This is a clear indication of the role CTF plays in the efforts to overcome effects of HLB and citrus canker.CTF supported the projects from Dr. Nian Wang’s lab that resulted in successful application of CRISPR/Cas9-mediated genome editing technology in Citrus. Plants produced this way will be the most market-friendly as they only have minor modifications of their own gene(s) and in the near future will be free of any other inserted DNA. The work done in CTF lead to production of Duncan grapefruit plants that exhibit high degree of resistance to citrus canker. Other commercially important cultivars could be made with improved resistance to canker based on results of this project.As a part of another research project aimed at control of Asian Citrus Psyllid (ACP) in citrus groves, transgenic Indian curry leaf plants were also produced in CTF. There are six such plants that are being tested for the ability to kill ACP after they were allowed to feed on their leaves.�All these successes were achieved even though CTF experienced high flux of employees, had to move to temporary location for six months, and was exposed to adverse effects of hurricane Irma.Future opportunities for the CTF are determined by the needs of Florida Citrus Industry. As those needs change from the search for the solution to HLB and canker to a development of specialty fruit with consumer-oriented traits in post-HLB era, CTF will be there to support all these efforts.��


Your browser does not support pdfs, click here to download the file.