NDLI: Silicon enhances suberization and lignification in roots of rice (Oryza sativa)

Content Provider	PubMed Central
Author	Fleck, Alexander T. Nye, Thandar Repenning, Cornelia Stahl, Frank Zahn, Marc Schenk, Manfred K.
Copyright Year	2011
Abstract	The beneficial element silicon (Si) may affect radial oxygen loss (ROL) of rice roots depending on suberization of the exodermis and lignification of sclerenchyma. Thus, the effect of Si nutrition on the oxidation power of rice roots, suberization and lignification was examined. In addition, Si-induced alterations of the transcript levels of 265 genes related to suberin and lignin synthesis were studied by custom-made microarray and quantitative Real Time-PCR. Without Si supply, the oxidation zone of 12 cm long adventitious roots extended along the entire root length but with Si supply the oxidation zone was restricted to 5 cm behind the root tip. This pattern coincided with enhanced suberization of the exodermis and lignification of sclerenchyma by Si supply. Suberization of the exodermis started, with and without Si supply, at 4–5 cm and 8–9 cm distance from the root tip (drt), respectively. Si significantly increased transcript abundance of 12 genes, while two genes had a reduced transcript level. A gene coding for a leucine-rich repeat protein exhibited a 25-fold higher transcript level with Si nutrition. Physiological, histochemical, and molecular-biological data showing that Si has an active impact on rice root anatomy and gene transcription is presented here.
Related Links	http://dx.doi.org/10.1093/jxb/erq392
Ending Page	2011
Page Count	11
Starting Page	2001
File Format	PDF
ISSN	00220957
e-ISSN	14602431
Journal	Journal of Experimental Botany
Issue Number	6
Volume Number	62
Language	English
Publisher	Oxford University Press
Publisher Date	2011-03-01
Access Restriction	Open
Rights Holder	Oxford University Press
Subject Keyword	Plant Science Physiology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science

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