University of Adelaide Library

Adelaide Research and Scholarship : Research Centres and Institutes : Australian Centre for Plant Functional Genomics (ACPFG) : ACPFG publications

Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/70007

Type: Journal article
Title: Cell wall modifications in maize pulvini in response to gravitational stress
Author: Zhang, Qisen
Taylor, Jillian
Shirley, Neil John
Burton, Rachel Anita
Fincher, Geoffrey
Citation: Plant Physiology, 2011; 156(4):2155-2171
Publisher: Amer Soc Plant Physiologists
Issue Date: 2011
ISSN: 0032-0889
Organisation: Australian Centre for Plant Functional Genomics (ACPFG)
Statement of
Responsibility: 
Qisen Zhang, Filomena A. Pettolino, Kanwarpal S. Dhugga, J. Antoni Rafalski, Scott Tingey, Jillian Taylor, Neil J. Shirley, Kevin Hayes, Mary Beatty, Suzanne R. Abrams, L. Irina Zaharia, Rachel A. Burton, Antony Bacic, and Geoffrey B. Fincher
Abstract: Changes in cell wall polysaccharides, transcript abundance, metabolite profiles, and hormone concentrations were monitored in the upper and lower regions of maize (Zea mays) pulvini in response to gravistimulation, during which maize plants placed in a horizontal position returned to the vertical orientation. Heteroxylan levels increased in the lower regions of the pulvini, together with lignin, but xyloglucans and heteromannan contents decreased. The degree of substitution of heteroxylan with arabinofuranosyl residues decreased in the lower pulvini, which exhibited increased mechanical strength as the plants returned to the vertical position. Few or no changes in noncellulosic wall polysaccharides could be detected on the upper side of the pulvinus, and crystalline cellulose content remained essentially constant in both the upper and lower pulvinus. Microarray analyses showed that spatial and temporal changes in transcript profiles were consistent with the changes in wall composition that were observed in the lower regions of the pulvinus. In addition, the microarray analyses indicated that metabolic pathways leading to the biosynthesis of phytohormones were differentially activated in the upper and lower regions of the pulvinus in response to gravistimulation. Metabolite profiles and measured hormone concentrations were consistent with the microarray data, insofar as auxin, physiologically active gibberellic acid, and metabolites potentially involved in lignin biosynthesis increased in the elongating cells of the lower pulvinus.
Rights: © 2011 American Society of Plant Biologists
RMID: 0020111672
DOI: 10.1104/pp.111.179606
Appears in Collections:ACPFG publications
View citing articles in: Web of Science
Google Scholar
Scopus

There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

© 2008 The University of Adelaide
library@adelaide.edu.au
CRICOS Provider Number 00123M
Service Charter | Copyright | Privacy | Disclaimer