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Agrobacterium-mediated transformation of turfgrass

a technology of agrobacterium and turfgrass, which is applied in the field of plant transformation methods, can solve the problems that the method that has proven successful for transforming a monocot, such as rice and maize, has not been successful for transforming turfgrass, and the turfgrass has not been recalcitrant to tissue culture, transformation and regeneration procedures, etc., and achieves significant practical utility and efficient and reliable effects

Inactive Publication Date: 2006-09-21
RUTGERS THE STATE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] In accordance with the objects of the present invention, an Agrobacterium-mediated transformation system for turfgrass is provided, which is efficient and reliable. The invention also provides for the development of transgenic plants containing one or more transgenes of significant practical utility.

Problems solved by technology

However, similar to most monocotyledenous plants, turfgrasses have proven recalcitrant to tissue culture, transformation and regeneration procedures.
Among these, Agrobacterium-mediated transformation of a turfgrass heretofore has not been accomplished.
As a result, methods that have proven successful for Agrobacterium-mediated transformation of some monocots, such as rice and maize, have not been successful for transforming turfgrass.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Construction of Agrobacterium tumefaciens Strain LBA4404, Containing pSB111SH Superbinary Hybrid Vector

[0060] The vector pTOK233 described by Hiei et al. (1994) for transformation of rice was not useful for transformation of creeping bentgrass despite numerous attempts. It was suspected that the cauliflower mosaic 35S promoter was the source of the problem in that it appears to be a very weak promoter in turfgrass. Accordingly, an alternate pair of plasmid vectors was obtained, namely pSB1 and pSB11 (Japan Tobacco, Inc. Plant Breeding and Genetics Research Laboratory, 700 Higashibara, Toyoda, Iwata, Shizuoka, Japan). pSB11 is a 6.3 kb plasmid which contains a multicloning region with a number of unique restriction sites between the left and right border sequences delineating the T-DNA region that will be transferred from Agrobacterium tumefaciens to the plant genome. Monocot “expression cassettes” expressing hygromycin B phosphotransferase (to confer hygromycin resistance) and gluc...

example 2

Agrobacterium-Mediated Transformation of Creeping Bentgrass With Superbinary Hybrid Vector pSB111SH

[0063] In this example, an Agrobacterium transformation system for creeping bentgrass, Agrostis palustris, is described, which utilizes the superbinary hybrid test vector described in Example 1

[0064] Media:

MMSG Medium

[0065] Per Liter:

Murashige and Skoog basal salts4.33gsucrose30gGamborg vitamins (10000×)1mlcasein hydrolysate500mgdicamba (dichloro-o-anisic acid)6.6mg6 BAP (6-benzylaminopurine)0.5mgAdjust the pH to 5.6 to 5.8.Add GEL-GRO ™*2.4gAutoclave and dispense into Petri dishes.

(*GEL-GRO ™ is gellan gum, an agar substitute, manufactured by ICN Biomedicals, Inc. If GEL-GRO ™ is unavailable, agar or an equivalent agar substitute may be utilized.)

Modified AAM Medium

[0066] Per Liter:

glutamine875mgaspartic acid266mgarginine174mgglycine7.5mgsucrose88.5mg2,4-D1mgkinetin0.2mgGA30.1mgMurashige & Skoog vitamins (1000×)1mlcasamino acids500mgglucose36gAdjust pH to 5.2 and autoclave.A...

example 3

Agrobacterium-Mediated Transformation of Tall Fescue With Superbinary Hybrid Vector pSB111SH

[0083] In this example, an Agrobacterium transformation system for tall fescue, Festuca arundinacea Scheb., is described, which utilizes the superbinary hybrid test vector described in Example 1.

[0084] Media:

MMSG Medium

[0085] This medium was formulated as described in Example 2.

[0086] Inoculation Medium Per Liter:

Murashige & Skoog basal salts440mgsucrose30gdicamba6.6mg6 BAP (6-benzyl aminopurine)0.5mgGamborg vitamins (1000×)1mlcasein hydrolysate500mgglucose10gAdjust pH to 5.7 and autoclave.Immediately before use add acetosyringone to a final concentration of200 μM and pluronic F-68 to a final concentration of 0.02%.

Co-Cultivation Medium

[0087] Per Liter:

Murashige and Skoog basal salts4.4gsucrose30gglucose10gGamborg vitamins (1000×)1mlcasein hydrolysate500mgdicamba (dichloro-o-anisic acid)6.6mg6 BAP (6-benzylaminopurine)0.5mgAdjust the pH to 5.7Add GEL-GRO ™2.4gAutoclaveAdd acetosyrin...

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Abstract

A method of obtaining transgenic turfgrass plants by an Agrobacterium-mediated transformation protocol is disclosed. The protocol makes use of a modified Agrobacterium vector system in which selectable marker genes and other genes of interest are operably linked to strong promoters from monocotyledenous plants, such as actin and ubiquitin promoters, that function efficiently in turfgrass cells. Transgenic turfgrass plants of several species, produced by the Agrobacterium-mediated transformation method, are also disclosed.

Description

[0001] This application claims priority to U.S. Provisional Application No. 60 / 093,163, filed Jul. 17, 1998, the entirety of which is incorporated by reference herein.FIELD OF THE INVENTION [0002] This invention relates to the field of plant transformation methods. More specifically, an Agrobacterium-mediated method for transforming turfgrass is provided, as well as transgenic turfgrass produced by the method. BACKGROUND OF THE INVENTION [0003] Various scientific articles and patents are referred to in parentheses throughout the specification. These documents are incorporated by reference herein to describe the state of the art to which this invention pertains. Full citations of the scientific articles appear at the end of the specification. [0004] Turfgrasses and turfgrass breeding are of significant economic importance worldwide. In recent years, traditional breeding programs have been augmented by molecular biological and recombinant techniques. However, similar to most monocotyl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C12N15/82A01H5/00A01H1/00
CPCA01H5/12C12N15/8205
Inventor ZILINSKAS, BARBARA A.PITCHER, LYNNE H.LAKKARAJU, SUBHA R.
Owner RUTGERS THE STATE UNIV
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