NDLI: Light and abiotic stresses regulate the expression of GDP-l-galactose phosphorylase and levels of ascorbic acid in two kiwifruit genotypes via light-responsive and stress-inducible cis-elements in their promoters

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Planta : Volume 238, Issue 2, August 2013

Planta : Volume 238, Issue 1, July 2013

Light and abiotic stresses regulate the expression of GDP-l-galactose phosphorylase and levels of ascorbic acid in two kiwifruit genotypes via light-responsive and stress-inducible cis-elements in their promoters

Content Provider	Springer Nature Link
Author	Li, Juan Liang, Dong Li, Mingjun Ma, Fengwang
Copyright Year	2013
Abstract	Ascorbic acid (AsA) plays an essential role in plants by protecting cells against oxidative damage. GDP-l-galactose phosphorylase (GGP) is the first committed gene for AsA synthesis. Our research examined AsA levels, regulation of GGP gene expression, and how these are related to abiotic stresses in two species of Actinidia (kiwifruit). When leaves were subjected to continuous darkness or light, ABA or MeJA, heat, or a hypoxic environment, we found some correlation between the relative levels of GGP mRNA and AsA concentrations. In transformed tobacco plants, activity of the GGP promoter was induced by all of these treatments. However, the degree of inducibility in the two kiwifruit species differed among the GGP promoter deletions. We deduced that the G-box motif, a light-responsive element, may have an important function in regulating GGP transcripts under various light conditions in both A. deliciosa and A. eriantha. Other elements such as ABRE, the CGTCA motif, and HSE might also control the promoter activities of GGP in kiwifruit. Altogether, these data suggest that GGP expression in the two kiwifruit species is regulated by light or abiotic stress via the relative cis-elements in their promoters. Furthermore, GGP has a critical role in modulating AsA concentrations in kiwifruit species under abiotic stresses.
Starting Page	535
Ending Page	547
Page Count	13
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	238
Issue Number	3
e-ISSN	14322048
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-06-18
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Actinidia Ascorbic acid cis-element GGP expression regulation GUS Plant Sciences Agriculture Ecology Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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