EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Differential effect of auxin on molecular weight distributions of xyloglucans in cell walls of outer and inner tissues from segments of dark grown squash (Cucurbita maxima Duch.) hypocotyls



Differential effect of auxin on molecular weight distributions of xyloglucans in cell walls of outer and inner tissues from segments of dark grown squash (Cucurbita maxima Duch.) hypocotyls



Plant Physiology 95(4): 1070-1076



Effects of indole-3-acetic acid (IAA) on the mechanical properties of cell walls and structures of cell wall polysaccharides in outer and inner tissues of segments of dark grown squash (Cucurbita maxima Duch.) hypocotyls were investigated. IAA induced the elongation of unpeeled, intact segments, but had no effect on the elongation of peeled segments. IAA induced the cell wall loosening in outer tissues as studied by the stress-relaxation analysis but not in inner tissues. IAA-induced changes in the net sugar content of cell wall fractions in outer and inner tissues were very small. Extracted hemicellulosic xyloglucans derived from outer tissues had a molecular weight about two times as large as in inner tissues, and the molecular weight of xyloglucans in both outer and inner tissues decreased during incubation. IAA substantially accelerated the depolymerization of xyloglucans in outer tissues, while it prevented that in inner tissues. These results suggest that IAA-induced growth in intact segments is due to the cell wall loosening in outer tissues, and that IAA-accelerated depolymerization of hemicellulosic xyloglucans in outer tissues is involved in the cell wall loosening processes.

(PDF emailed within 0-6 h: $19.90)

Accession: 002072562

Download citation: RISBibTeXText

PMID: 16668092

DOI: 10.1104/pp.95.4.1070



Related references

Sugar Composition and Molecular Weight Distribution of Cell Wall Polysaccharides in Outer and Inner Tissues from Segments of Dark Grown Squash (Cucurbita maxima Duch.) Hypocotyls. Plant Physiology 93(3): 998-1004, 1990

Unchanged molecular-weight distribution of Xyloglucans in outer tissue cell walls along intact growing hypocotyls of squash (Cucurbita maxima Duch.) seedlings. Plant and cell physiology 34(1): 143-149, 1993

Auxin stimulates the synthesis but not the loosening of cell walls in isolated outer tissue of dark-grown squash (Cucurbita maxima Duch.) hypocotyls. Journal of Plant Physiology 154(2): 197-202, 1999

Brassinolide-induced elongation of inner tissues of segments of squash (Cucurbita maxima Duch.) hypocotyls. Plant and Cell Physiology 35(7): 1103-1106, 1994

Water potential and mechanical properties of the cell wall of hypocotyls of dark grown squash cucurbita maxima duch. under water stress conditions. Plant and Cell Physiology 29(8): 1337-1344, 1988

Effect of inbreeding on variability of winter squash (Cucurbita maxima Duch.) and pumpkin (Cucurbita pepo L.). Soviet genetics: (Transl 1977), 12 (5) 551-553, 1976

Changes in wall polysaccharides of squash cucurbita maxima duch. hypocotyls under water stress condition ii. composition of pectic and hemicellulosic polysaccharides. Plant and Cell Physiology 28(6): 1059-1070, 1987

Plant regeneration from internode segments of Cucurbita maxima Duch. x Cucurbita moschata Duch. Current Science 65(7): 562-564, 1993

Combining ability and heterosis effect in winter squash (Cucurbita maxima Duch.). Genetica Polonica 34(3): 259-272, 1993

Effect of infection by hypomyces solani f sp cucurbitae on apparent free space cell membrane permeability and respiration of squash d hypocotyls cucurbita maxima d. Plant Physiology (Rockville) 43(10): 1666-1672, 1968

Effect of hot water treatment on the postharvest behavior of winter squash cucurbita maxima duch. Hortscience 27(6): 652, 1992

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. Plant and Cell Physiology 28(6): 1051-1058, 1987

Effect of sowing time and pinching node on the growth fruit set and yield of winter squash cucurbita maxima duch. Bulletin of the Kanagawa Horticultural Experiment Station (34): 15-21, 1987

Reciprocal crosses in the squash, Cucurbita maxima Duch. Tech Bull Minnesota Agric Expt Sta 89: 1-28, 1950