Title

Transformation Of Sweet Potato Tissues With Green-Fluorescent Protein Gene

Keywords

Electroporation; Green-fluorescent protein; Intact cells; Ipomoea batatas L. (Lam.); Particle bombardment; Protoplasts; Stable expression; Sweet potato

Abstract

The expression of the green-fluorescent protein (GFP) gene from Aequorea victoria (jellyfish) was analyzed by transient and stable expression in sweet potato Ipomoea batatas L. (Lam.) cv. Beauregard tissues by electroporation and particle bombardment. Leaf and petiole segments from in vitro-raised young plantlets were used for protoplast isolation and electroporation. Embryogenic callus was also produced from leaf segments for particle bombardment experiments. A buffer solution containing 1 × 106 protoplasts ml-1 was mixed with plasmid DNA containing the GFP gene, and electroporated at 375 V cm-1. Approximately 25-30% of electroporated mesophyll cell protoplasts subsequently cultured in KM8P medium regenerated cell walls after 48 h. Of these, 3% emitted bright green fluorescence when exposed to UV-blue light at 395 nm. Transformed cells continued to grow after embedding in KM8P medium solidified with 1.2% SeaPlaque agarose. Stable expression of GFP was observed after 4 wk of culture in approximately 1.0% of the initial GFP positive cells (27.5 GFP positive micro calluses out of 3024 cells which transiently expressed GFP 48 h after electroporation). In a separate experiment, 600-700 bright green spots were observed per plate 48 h after bombarding leaf segments or embryogenic callus. In bombarded cultures, several stable GFP-expressing sectors were observed in leaf-derived embryogenic callus grown without selection for 4 wk. These results show that GFP gene expression can occur in various sweet potato tissues, and that it may be a useful screenable marker to improve transformation efficiency and obtain transgenic sweet potato plants.

Publication Date

1-1-2001

Publication Title

In Vitro Cellular and Developmental Biology - Plant

Volume

37

Issue

5

Number of Pages

648-653

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1007/s11627-001-0113-z

Socpus ID

0035159380 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0035159380

This document is currently not available here.

Share

COinS