This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Web of Science (153) Citing Articles via Google Scholar Google Scholar Articles by Labavitch, J. M. Articles by Ray, P. M. Search for Related Content PubMed PubMed Citation Articles by Labavitch, J. M. Articles by Ray, P. M. Agricola Articles by Labavitch, J. M. Articles by Ray, P. M.

Articles

Relationship between Promotion of Xyloglucan Metabolism and Induction of Elongation by Indoleacetic Acid ¹

^a Department of Biological Sciences, Stanford University, Stanford, California 94305

Auxin promotes the liberation of a xlyoglucan polymer from the cell walls of elongating pea (Pisum sativum) stem segments. The released polymer can be isolated from the polysaccharide fraction of the water-soluble portion of tissue homogenates, thus providing as assay for this kind of metabolism. Promotion of xyloglucan metabolism by auxin begins within 15 minutes of hormone presentation. The effect increases with auxin concentration in a manner similar to the hormone effect on elongation. However, the xyloglucan effect of auxin occurs perfectly normally when elongation is completely blocked by mannitol. Metabolic inhibitors and Ca²⁺, on the other hand, inhibit auxin promotion of elongation and of xyloglucan metabolism in parallel. The results suggest that the changes in xyloglucan reflect the means by which auxin modifies the cell wall to cause elongation.

¹ Research was supported by a National Science Foundation grant to P.M.R. and a National Science Foundation predoctoral fellowship to J.M.L.

This article has been cited by other articles:

				A. P. S. Sandhu, G. S. Randhawa, and K. S. Dhugga Plant Cell Wall Matrix Polysaccharide Biosynthesis Mol Plant, September 1, 2009; 2(5): 840 - 850. [Abstract] [Full Text] [PDF]

				A. Tabuchi, H. Mori, S. Kamisaka, and T. Hoson A New Type of Endo-Xyloglucan Transferase Devoted to Xyloglucan Hydrolysis in the Cell Wall of Azuki Bean Epicotyls Plant Cell Physiol., February 1, 2001; 42(2): 154 - 161. [Abstract] [Full Text] [PDF]

				D. J. Cosgrove Wall Structure and Wall Loosening. A Look Backwards and Forwards Plant Physiology, January 1, 2001; 125(1): 131 - 134. [Full Text]

				K. Vissenberg, I. M. Martinez-Vilchez, J.-P. Verbelen, J. G. Miller, and S. C. Fry In Vivo Colocalization of Xyloglucan Endotransglycosylase Activity and Its Donor Substrate in the Elongation Zone of Arabidopsis Roots PLANT CELL, July 1, 2000; 12(7): 1229 - 1238. [Abstract] [Full Text]

				R. Tominaga, M. Samejima, F. Sakai, and T. Hayashi Occurrence of Cello-Oligosaccharides in the Apoplast of Auxin-Treated Pea Stems Plant Physiology, January 1, 1999; 119(1): 249 - 254. [Abstract] [Full Text]