NDLI: Expression of Arabidopsis phytochelatin synthase in Indian mustard (Brassica juncea) plants enhances tolerance for Cd and Zn

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Expression of Arabidopsis phytochelatin synthase in Indian mustard (Brassica juncea) plants enhances tolerance for Cd and Zn

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Expression of Arabidopsis phytochelatin synthase in Indian mustard (Brassica juncea) plants enhances tolerance for Cd and Zn

Content Provider	Springer Nature Link
Author	Gasic, Ksenija Korban, Schuyler S.
Copyright Year	2006
Abstract	Phytochelatins (PCs) are heavy metal binding peptides that play an important role in sequestration and detoxification of heavy metals in plants. In this study, our goal was to develop transgenic plants with increased tolerance for and accumulation of heavy metals from soil by expressing an Arabidopsis thaliana AtPCS1 gene, encoding phytochelatin synthase (PCS), in Indian mustard (Brassica juncea L.). A 35S promoter fused to a FLAG–tagged AtPCS1 cDNA was expressed in Indian mustard, and transgenic lines, designated pc lines, were evaluated for tolerance to and accumulation of Cd and Zn. Transgenic plants with moderate AtPCS1 expression levels showed significantly higher tolerance to Cd and Zn stress, but accumulated significantly less Cd and Zn than wild type plants in both shoot and root tissues. However, transgenic plants with highest expression of the transgene did not exhibit enhanced Cd and Zn tolerance. Shoots of Cd-treated pc plants had significantly higher levels of phytochelatins and thiols than wild-type plants. Significantly lower concentrations of gluthatione in Cd-treated shoot and root tissues of transgenic plants were observed. Moderate expression levels of phytochelatin synthase improved the ability of Indian mustard to tolerate certain levels of heavy metals, but at the same time did not increase the accumulation potential for Cd and Zn.
Starting Page	1277
Ending Page	1285
Page Count	9
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	225
Issue Number	5
e-ISSN	14322048
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-11-04
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Brassica juncea L. Cadmium Heavy metal Phytochelatin synthase Phytoremediation Zinc Forestry Ecology Agriculture Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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