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Author Szankowski, Iris ♦ Flachowsky, Henryk ♦ Li, Houhua ♦ Halbwirth, Heidrun ♦ Treutter, Dieter ♦ Regos, Ionela ♦ Hanke, Magda Viola ♦ Stich, Karl ♦ Fischer, Thilo C.
Source SpringerLink
Content type Text
Publisher Springer-Verlag
File Format PDF
Copyright Year ©2008
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Life sciences; biology
Subject Keyword Anthocyanidin synthase ♦ Epicatechin ♦ Flavonoids ♦ Gene silencing ♦ Malus ♦ Transformation ♦ Ecology ♦ Forestry ♦ Agriculture ♦ Plant Sciences
Abstract We have investigated the consequences of blocking anthocyanin biosynthesis by silencing a key enzyme, anthocyanidin synthase, in transgenic plants of a red-leaved apple cultivar. This is complementary to a previous study of induction of anthocyanin biosynthesis by overexpressing a heterologous transcription factor. Analysis of these opposite phenotypes allows one to study anthocyanin functions in apple and to test the influence of the genetic manipulation on other, related metabolites. As expected, anthocyanin biosynthesis was almost completely blocked and this was accompanied by a shift in the profile of flavonoids and related polyphenols. Most interestingly, a rise in epicatechin was found. A severe reduction of viability by necrotic leaf lesions was also observed, suggesting an essential function of anthocyanins in apple.
ISSN 00320935
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2008-12-09
Publisher Place Berlin/Heidelberg
e-ISSN 14322048
Journal Planta
Volume Number 229
Issue Number 3
Page Count 12
Starting Page 681
Ending Page 692


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Source: SpringerLink