Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Sakurai, N.
Right arrow Articles by Kuraishi, S.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Sakurai, N.
Right arrow Articles by Kuraishi, S.
Agricola
Right arrow Articles by Sakurai, N.
Right arrow Articles by Kuraishi, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1987, Vol. 28, No. 6 1051-1058
© 1987

Article

Changes in Wall Polysaccharides of Squash (Cucurbita maxima Duch.) Hypocotyls under Water Stress Condition

I. Wall Sugar Composition and Growth as Affected by Water Stress

Naoki Sakurai, Sadahiro Tanaka and Susumu Kuraishi

Department of Environmental Studies, Faculty of Intergrated Arts and Sciences, Hiroshima University Hiroshima 730, Japan

Hypocotyl growth of dark-grown squash (Cucurbita maxima Duch.) seedlings was greatly reduced by the addition of 60 mM polyethylene glycol (PEG) to hydroponic solution (water stress). When PEG was removed after one day, growth promptly recovered.

The contents of hemicelluloses and cellulose in the wall increased under unstressed condition as hypocotyls grew but these increases were substantially reduced by water stress. The increases in wall polysaccharide contents recovered when the water stress was relieved. The amounts per hypocotyl of cellulose and that of uronic acid in pectin changed in parallel with the growth (r=0.95 and 0.98, respectively). The amounts of most of the sugar components of hemicelluloses also changed in parallel with hypocotyl growth. Pectic and hemicellulosic galactose content of unstressed hypocotyls increased to day 2 when the hypocotyl grew at a maximum growth rate, then decreased. In contrast, galactose content of stressed hypocotyls progressively increased to the end of the experiment.

The results indicated that water stress substantially reduced net increases in most of the polysaccharides of the hypocotyl cell walls when it reduced the growth, but it did not affect syntheses of some galactosic polysaccharides in pectin and hemicellulose B. We assume that the syntheses of non-galactosic wall polysaccharides are associated with hypocotyl growth and the synthesis of galactose-containing polysaccharides with preservation of the potential of the cell wall to be loosened, since hypocotyl growth promptly and completely recovers when water stress is relieved.

(Received December 15, 1986; Accepted June 8, 1987)
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Cell PhysiolHome page
H. Tokumoto, K. Wakabayashi, S. Kamisaka, and T. Hoson
Changes in the Sugar Composition and Molecular Mass Distribution of Matrix Polysaccharides during Cotton Fiber Development
Plant Cell Physiol., April 15, 2002; 43(4): 411 - 418.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
H. Harrak, H. Chamberland, M. Plante, G. Bellemare, J. G. Lafontaine, and Z. Tabaeizadeh
A Proline-, Threonine-, and Glycine-Rich Protein Down-Regulated by Drought Is Localized in the Cell Wall of Xylem Elements
Plant Physiology, October 1, 1999; 121(2): 557 - 564.
[Abstract] [Full Text]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.