Annals of Botany 84: 225-233, 1999
© 1999 Annals of Botany Company
Mung Bean Hypocotyl Homogalacturonan: Localization, Organization and Origin
Laboratoire de Biologie Cellulaire Végétale, Université P. et M. Curie, Paris Laboratoire de Physiologie Végétale Appliquée, Université P. et M. Curie, Paris Laboratoire d'Enzymologie en milieu structuré, Institut J. Monod, Paris S.C.U.E.O.R., Université de Rouen Laboratoire de Pathologie Végétale, Institut National Agronomique, , Paris-Grignon
March 1, 1999 ; April 12, 1999 . April 29, 1999
Specific antibodies were used to localize both pectic structures and pectinmethylesterases (PME) along the mung bean hypocotyl. Calcium ions were also detected and estimated in both young, plastic and mature, stiffened cell walls. Highly methylesterified pectins were present in all cell walls but decreased from the hypocotyl hook downwards. Expanded cell walls were characterized by a high content of calcium ions and acidic pectins, although the latter's cross-reactivity to JIM 5 antibodies was partly lost. Co-localization of acidic homogalacturonan and calcium ions suggests the presence of egg-box structures that might participate in the cell wall stiffening process which develops along the hypocotyl. Acidic polymers could originate from the activity of the pectinmethylesterases present in precise wall areas but direct export of acidic polygalacturonan through Golgi vesicles was also observed. Copyright 1999 Annals of Botany Company
Cell walls, immunolocalization, hypocotyl, mung bean, pectin organization, Vigna radiata.
![]()
CiteULike
Connotea
Del.icio.us What's this?
This article has been cited by other articles:
![]() |
Q. Zhao, S. Yuan, X. Wang, Y. Zhang, H. Zhu, and C. Lu Restoration of Mature Etiolated Cucumber Hypocotyl Cell Wall Susceptibility to Expansin by Pretreatment with Fungal Pectinases and EGTA in Vitro Plant Physiology, August 1, 2008; 147(4): 1874 - 1885. [Abstract] [Full Text] [PDF] |
||||
![]() |
R. Goldberg, M. Pierron, M. Bordenave, C. Breton, C. Morvan, and C. H. du Penhoat Control of Mung Bean Pectinmethylesterase Isoform Activities. INFLUENCE OF pH AND CARBOXYL GROUP DISTRIBUTION ALONG THE PECTIC CHAINS J. Biol. Chem., March 16, 2001; 276(12): 8841 - 8847. [Abstract] [Full Text] [PDF] |
||||
![]() |
W. G. T. Willats, C. Orfila, G. Limberg, H. C. Buchholt, G.-J. W. M. van Alebeek, A. G. J. Voragen, S. E. Marcus, T. M. I. E. Christensen, J. D. Mikkelsen, B. S. Murray, et al. Modulation of the Degree and Pattern of Methyl-esterification of Pectic Homogalacturonan in Plant Cell Walls. IMPLICATIONS FOR PECTIN METHYL ESTERASE ACTION, MATRIX PROPERTIES, AND CELL ADHESION J. Biol. Chem., May 25, 2001; 276(22): 19404 - 19413. [Abstract] [Full Text] [PDF] |
||||

