Abstract
To investigate the role of the plant hormones produced by fungi, we tried to construct a system to examine the interaction between Rhizoctonia solani Kühn 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 from MAFF305219. Thus, the accumulation of IAA was not related to the host specificity.
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Claims 6
Claim · model-written summary
Cocultivation with rice cells increased fungal IAA in medium.
- Taxon
- Rice
Oryza sativat0 - Treatment
- cocultivation with rice cells (Oc)e0
- Interactor
- R. solani
Rhizoctonia solanie0pathogen - Outcome
- IAA in the medium produced by R. solanie0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
t0“Rice Suspension Cultures”
Claim · model-written summary
Rice culture filtrate increased fungal IAA in medium.
- Taxon
- RiceOryza sativat0
- Treatment
- culture filtrate (CF) of Oce0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Outcome
- IAA in the medium produced by R. solanie0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
t0“Rice Suspension Cultures”
Claim · model-written summary
The inducing factor was sensitive to heat, freeze-thaw and lyophilization and exceeded 10,000 molecular weight.
- Taxon
- RiceOryza sativat0
- Outcome
- factor(s) that induced the enhanced accumulation of IAAe0
- Value
- more than 10,000e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
t0“Rice Suspension Cultures”
Claim · model-written summary
Rice lines Oc and Ok induced fungal IAA accumulation after four hours, whereas other plant cultures did not.
- Taxon
- RiceOryza sativat0
- Material
- Oc and another line of rice cells (Ok)e0
- Treatment
- rice cells (Ok)e0
- Outcome
- accumulation of IAA in the fungal mediume0
- Qualifier
- 4 h after inoculatione0
- Comparator
- other cultures of plant cellse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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.”
t0“Rice Suspension Cultures”
Claim · model-written summary
Rice filtrate promoted IAA accumulation in other R. solani strains from different anastomosis groups.
- Taxon
- RiceOryza sativat0
- Treatment
- rice CFe0
- Interactor
- R. solaniRhizoctonia solanie0pathogen
- Outcome
- accumulation of IAAe0
- Direction
- promotivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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 from MAFF305219.”
t0“Rice Suspension Cultures”
Claim · model-written summary
IAA accumulation was unrelated to host specificity.
- Taxon
- RiceOryza sativat0
- Outcome
- accumulation of IAAe0
- Qualifier
- host specificitye0
Not reportedSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the accumulation of IAA was not related to the host specificity.”
t0“Rice Suspension Cultures”
The same questions in other papers
pathogen product · Rhizoctonia solani · Oryza sativa (rice)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
7 papers more in this group
See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.