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PMID: 12232136 Published · ppublish English Journal Article

Cyclic [beta]-1,6-1,3-Glucans of Bradyrhizobium japonicum USDA 110 Elicit Isoflavonoid Production in the Soybean (Glycine max) Host.

Plant physiology ·Vol. 104 ·No. 3 ·1994-03-00 ·Pages 917-923

Miller KJ, Hadley JA, Gustine DL

Abstract

High levels of cyclic [beta]-1,6-1,3-glucans (e.g. 0.1 mg mg-1 of total protein) are synthesized by free-living cells as well as by bacteroids of Bradyrhizobium japonicum USDA 110 (K.J. Miller, R.S. Gore, R. Johnson, A.J. Benesi, V.N. Reinhold [1990] J Bacteriol 172: 136-142; R.S. Gore and K.J. Miller [1993] Plant Physiol 102: 191-194). These molecules share structural features with glucan fragments isolated from the mycelial cell wall of the soybean (Glycine max) pathogen Phytophthora megasperma. These latter glucans have been shown to be potent elicitors (at nanogram levels) of the phytoalexin glyceollin in G. max. Using the well-characterized soybean cotyledon bioassay, we now show that the cyclic [beta]-1,6-1,3-glucans of B. japonicum USDA 110 are also biologically active elicitors of glyceollin production (but at microgram levels). We further show that both classes of [beta]-glucans elicit the production of the isoflavone daidzein within soybean cotyledon wound droplets.

Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Miller K. J.
Graduate Programs in Genetics (K.J.M.) and Plant Physiology (K.J.M., D.L.G.), Departments of Food Science (K.J.M., J.A.H.) and Agronomy (D.L.G.), The Pennsylvania State University, University Park, Pennsylvania 16802.
Hadley J. A.
Gustine D. L.
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Article Info
Journal
Plant physiology
Abbr.
Plant Physiol
ISSN
1532-2548
DOI
10.1104/pp.104.3.917
Published
1994-03-00
Pages
917-923
Language
English
Region
United States
NLM ID
0401224
PMCID
PMC160689
External Links
PubMed source DOI: 10.1104/pp.104.3.917 PMC Full Text View journal details
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