Increased production of IAA by Rhizoctonia solani is induced by culture filtrate from rice [Oryza sativa] suspension cultures

To investigate the role of the plant hormones produced by fungi, we tried to construct a system to examine the interaction between Rhizoctonia solani Kuehn MAFF305219 and rice cells in suspension culture (Oc). R. solani was previously found to produce IAA, with the main biosynthetic pathway via the...

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Bibliographic Details
Published in:Plant and cell physiology 1998-01, Vol.39 (1), p.43-48
Main Authors: Furukawa, T. (Tokyo Metropolitan Coll., Akishima (Japan)), Syono, K
Format: Article
Language:English
Subjects:
ACTIVIDAD CATALITICA
ACTIVITE CATALYTIQUE
AIA
Auxin
biochemical pathways
BIOCHEMICAL REACTIONS
Biological and medical sciences
biosynthesis
CATALYTIC ACTIVITY
cell suspension culture
CELLS
CELLULE
CELULAS
CHEMICAL SYNTHESIS
Culture filtrate
culture filtrates
CULTURE TECHNIQUES
FILTRACION
FILTRATION
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
host-parasite relationships
IAA
indole acetic acid
indole-3-pyruvate pathway
induction
ORYZA SATIVA
pathogenicity
Phytopathology. Animal pests. Plant and forest protection
plant pathogenic fungi
precursors
quantitative analysis
REACCIONES BIOQUIMICAS
REACTION BIOCHIMIQUE
RHIZOCTONIA SOLANI
Rice
SINTESIS QUIMICA
SYNTHESE CHIMIQUE
Systematics. Morphology. Development cycle. Physiology
TECHNIQUE DE CULTURE
TECNICAS DE CULTIVO
Thanatephorus cucumeris
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Summary:To investigate the role of the plant hormones produced by fungi, we tried to construct a system to examine the interaction between Rhizoctonia solani Kuehn MAFF305219 and rice cells in suspension culture (Oc). R. solani was previously found to produce IAA, with the main biosynthetic pathway via the indole-3-pyruvate pathway. The amount of IAA in the medium produced by R. solani was increased by cocultivation with rice cells )Oc) and by culture filtrate (CF) of Oc. Further analysis revealed that the factor(s) that induced the enhanced accumulation of IAA was sensitive to heat, to freezing and thawing and lyophilization, and the molecular weight was estimated to more than 10,000. These results suggest that the active agent(s) in the medium was (a) protein or a proteinous substance. Among suspension cultures of various plants, Oc and another line of rice cells (Ok) had the ability to induce the accumulation of IAA in the fungal medium 4 h after inoculation but other cultures of plant cells were ineffective. The promotive effect of rice CF on the accumulation of IAA was also observed with some strains of R. solani that belong to a different anastmosis group fro MAFF305219. Thus, the accumulation of IAA was not related to the host specificity
ISSN:0032-0781
1471-9053
DOI:10.1093/oxfordjournals.pcp.a029287