|
Plant Physiol, May 2000, Vol. 123, pp. 59-70
Ectopic Deposition of Lignin in the Pith of Stems of Two
Arabidopsis Mutants
Ruiqin
Zhong,
Amy
Ripperger,1 and
Zheng-Hua
Ye*
Department of Botany, University of Georgia, Athens, Georgia 30602
The biosynthesis of lignin in vascular plants is regulated both
developmentally and environmentally. In the inflorescence stems of
Arabidopsis, lignin is mainly deposited in the walls of xylem cells and
interfascicular fiber cells during normal plant growth and development.
The mechanisms controlling the spatial deposition of lignin remain
unknown. By screening ethyl methanesulfonate-mutagenized populations of
Arabidopsis, we have isolated two allelic elp1 (ectopic
deposition of lignin in pith) mutants with altered lignin deposition
patterns. In elp1 stems, lignin was ectopically
deposited in the walls of pith parenchyma cells in addition to its
normal deposition in the walls of xylem and fiber cells. Lignin
appeared to be deposited in patches of parenchyma cells in the pith of both young and mature elp1 stems. The ectopic deposition
of lignin in the pith of elp1 stems was accompanied by
an increase in the activities of enzymes in the lignin biosynthetic
pathway and with the ectopic expression of caffeoyl coenzyme A
O-methyltransferase in pith cells. These results
indicate that the ELP1 locus is involved in the
repression of the lignin biosynthetic pathway in the pith. Isolation of
the elp1 mutants provides a novel means with which to
study the molecular mechanisms underlying the spatial control of lignification.
1
A.R. was an undergraduate student at Washington
University (St. Louis) when she participated in this project.
*
Corresponding author; e-mail ye{at}dogwood.botany.uga.edu; fax
706-542-1805.
© 2000 American Society of Plant Physiologists
This article has been cited by other articles:
|
|
|
|
 
A. Karaba, S. Dixit, R. Greco, A. Aharoni, K. R. Trijatmiko, N. Marsch-Martinez, A. Krishnan, K. N. Nataraja, M. Udayakumar, and A. Pereira
Improvement of water use efficiency in rice by expression of HARDY, an Arabidopsis drought and salt tolerance gene
PNAS,
September 25, 2007;
104(39):
15270 - 15275.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
J. G. DUBROVSKY, M. GUTTENBERGER, A. SARALEGUI, S. NAPSUCIALY-MENDIVIL, B. VOIGT, F. BALUSKA, and D. MENZEL
Neutral Red as a Probe for Confocal Laser Scanning Microscopy Studies of Plant Roots
Ann. Bot.,
June 1, 2006;
97(6):
1127 - 1138.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
K. A. Petsch, J. Mylne, and J. R. Botella
Cosuppression of Eukaryotic Release Factor 1-1 in Arabidopsis Affects Cell Elongation and Radial Cell Division
Plant Physiology,
September 1, 2005;
139(1):
115 - 126.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. SENGUPTA and P. PALIT
Characterization of a Lignified Secondary Phloem Fibre-deficient Mutant of Jute (Corchorus capsularis)
Ann. Bot.,
February 1, 2004;
93(2):
211 - 220.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
G. Mele, N. Ori, Y. Sato, and S. Hake
The knotted1-like homeobox gene BREVIPEDICELLUS regulates cell differentiation by modulating metabolic pathways
Genes & Dev.,
September 1, 2003;
17(17):
2088 - 2093.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R. B. Nair, Q. Xia, C. J. Kartha, E. Kurylo, R. N. Hirji, R. Datla, and G. Selvaraj
Arabidopsis CYP98A3 Mediating Aromatic 3-Hydroxylation. Developmental Regulation of the Gene, and Expression in Yeast
Plant Physiology,
September 1, 2002;
130(1):
210 - 220.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
|
|
R. Zhong, S. J. Kays, B. P. Schroeder, and Z.-H. Ye
Mutation of a Chitinase-Like Gene Causes Ectopic Deposition of Lignin, Aberrant Cell Shapes, and Overproduction of Ethylene
PLANT CELL,
January 1, 2002;
14(1):
165 - 179.
[Abstract]
[Full Text]
[PDF]
|
|
|
|
|
