Li, Y.; Tang, D.; Liu, Z.; Chen, J.; Cheng, B.; Kumar, R.; Yer, H.; Li, Y. An Improved Procedure for Agrobacterium-Mediated Transformation of ‘Carrizo’ Citrange. Plants2022, 11, 1457.
Li, Y.; Tang, D.; Liu, Z.; Chen, J.; Cheng, B.; Kumar, R.; Yer, H.; Li, Y. An Improved Procedure for Agrobacterium-Mediated Transformation of ‘Carrizo’ Citrange. Plants 2022, 11, 1457.
Li, Y.; Tang, D.; Liu, Z.; Chen, J.; Cheng, B.; Kumar, R.; Yer, H.; Li, Y. An Improved Procedure for Agrobacterium-Mediated Transformation of ‘Carrizo’ Citrange. Plants2022, 11, 1457.
Li, Y.; Tang, D.; Liu, Z.; Chen, J.; Cheng, B.; Kumar, R.; Yer, H.; Li, Y. An Improved Procedure for Agrobacterium-Mediated Transformation of ‘Carrizo’ Citrange. Plants 2022, 11, 1457.
Abstract
Although several protocols for genetic transformation of citrus have been published, it is highly desirable to further improve its efficiency. Here we report treatments of Agrobacterium cells and citrus explants prior to and during co-cultivation process to enhance transformation efficiency using a commercially used rootstock 'Carrizo' Citrange as a model plant. We pre-cultured Agrobacterium cells in a 1/10 MS, 0.5 g/L 2-(N-morpholino) ethanesulfonic acid (MES) and 100 µM acetosyringone liquid medium for 6 hours at 25 ℃ before used to infect citrus explants. We incubated epicotyl segments in an MS liquid medium containing 13.2 µM 6-BA, 4.5 µM 2,4-D, 0.5 µM NAA for 3 hours at 25℃ prior to Agrobacterium infection. In the co-cultivation medium, we added 30 µM paclobutrazol and 10 µM lipoic acid. Each of these three treatments significantly increased the efficiencies of transformation. When the three treatments were combined, we observed that the transformation efficiency was enhanced from 11.5% to 52.3%. The improvement of genetic transformation efficiency mediated by these three simple treatments may facilitate more efficient applications of transgenic and gene editing technologies for functional characterization of citrus genes and for genetic improvement of cultivated citrus varieties.
Keywords
Citrus; Agrobacterium tumefaciens; transformation efficiency; treatments of Agrobacterium and explants
Subject
Biology and Life Sciences, Plant Sciences
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
