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Vitamin K1 accumulation in tobacco plants overexpressing bacterial genes involved in the biosynthesis of salicylic acid

Paper ID Volume ID Publish Year Pages File Format Full-Text
25419 43573 2007 8 PDF Available
Title
Vitamin K1 accumulation in tobacco plants overexpressing bacterial genes involved in the biosynthesis of salicylic acid
Abstract

Phylloquinone (Vitamin K1) is an essential component of the photosynthetic electron transfer. As isochorismate is required for the biosynthesis of Vitamin K1, isochorismate synthase (ICS) activity is expected to be present in all green plants. In bacteria salicylic acid (SA) is synthesized via a two step pathway involving ICS and isochorismate pyruvate lyase (IPL). The effect of the introduction in tobacco plants of the bacterial ICS and IPL genes on the endogenous isochorismate pathway was investigated. Transgenic tobacco plants in which IPL was targeted to the chloroplast suffered severe growth retardation and had low Vitamin K1 content. Probably because isochorismate was channeled towards SA production, the plants were no longer able to produce normal levels of Vitamin K1. Transgenic tobacco plants in which the bacterial ICS was present in the chloroplast showed higher Vitamin K1 contents than wild type plants.

Keywords
Vitamin K1 (phylloquinone); Transgenic tobacco; Salicylic acid; Isochorismate; Chorismate; Dwarfing
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Vitamin K1 accumulation in tobacco plants overexpressing bacterial genes involved in the biosynthesis of salicylic acid
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 128, Issue 1, 30 January 2007, Pages 72–79
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us