Abstract
In the wheat plants infected with dwarf bunt, sporulation occurs only in developing kernels. The dikaryon was isolated from infected kernels and from the rachis of infected spikes. The development of pathogenic hyphae and teliosporogenesis in vivo and in vitro is described. Ultrastructural studies indicated that in vivo teliospore primordia detach from sporogenous hyphae in the hymenium layer and develop into mature teliospores. Teliospores were borne terminally on sporogenous hyphae in vitro. Substances that stimulate hyphal branching and inhibit teliospore formation of the dikaryon were isolated from vegetative wheat tissues but not from bunt-infected spikes containing the sporulating dikaryon. The dikaryon resumed sporulation only when transferred to rich nutrient media without extracts. Extracts from infected wheat spikes containing the sporulating dikaryon induced the vegetative dikaryon to sporulate. The bioregulators involved in these phenomena were not identified. Bioactive extracts had no apparent effect on the growth of the monokaryon. A fluorochrome, mithramycin, was used to detect nuclei in monokaryotic and dikaryotic hyphae. New approaches to bunt control are discussed. Key words: Tilletia caries, Tilletia controversa, monokaryon, teliospores, bioregulators.
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Claims 8
Claim · model-written summary
Dwarf bunt sporulated only in developing wheat kernels.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- developing kernelse0
- Interactor
- dwarf bunte0pathogen
- Outcome
- In the wheat plants infected with dwarf bunt, sporulation occurs only in developing kernels.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the wheat plants infected with dwarf bunt, sporulation occurs only in developing kernels.”
Claim · model-written summary
In vivo teliospore primordia detach from hymenium sporogenous hyphae and mature.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Ultrastructural studies indicated that in vivo teliospore primordia detach from sporogenous hyphae in the hymenium layer and develop into mature teliospores.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ultrastructural studies indicated that in vivo teliospore primordia detach from sporogenous hyphae in the hymenium layer and develop into mature teliospores.”
t0“wheat plants”
Claim · model-written summary
In vitro teliospores formed terminally on sporogenous hyphae.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Teliospores were borne terminally on sporogenous hyphae in vitro.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Teliospores were borne terminally on sporogenous hyphae in vitro.”
t0“wheat plants”
Claim · model-written summary
Vegetative wheat tissue substances stimulated dikaryotic hyphal branching.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- vegetative wheat tissuese0
- Treatment
- Substancese0
- Outcome
- Substances that stimulate hyphal branching and inhibit teliospore formation of the dikaryon were isolated from vegetative wheat tissues but not from bunt-infected spikes containing the sporulating dikaryon.e0
- Direction
- stimulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Substances that stimulate hyphal branching and inhibit teliospore formation of the dikaryon were isolated from vegetative wheat tissues but not from bunt-infected spikes containing the sporulating dikaryon.”
Claim · model-written summary
Vegetative wheat tissue substances inhibited dikaryotic teliospore formation.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Substancese0
- Outcome
- Substances that stimulate hyphal branching and inhibit teliospore formation of the dikaryon were isolated from vegetative wheat tissues but not from bunt-infected spikes containing the sporulating dikaryon.e0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Substances that stimulate hyphal branching and inhibit teliospore formation of the dikaryon were isolated from vegetative wheat tissues but not from bunt-infected spikes containing the sporulating dikaryon.”
Claim · model-written summary
Dikaryon sporulation resumed on rich media without extracts.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- rich nutrient media without extractse0
- Outcome
- The dikaryon resumed sporulation only when transferred to rich nutrient media without extracts.e0
- Direction
- resumede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The dikaryon resumed sporulation only when transferred to rich nutrient media without extracts.”
t0“wheat plants”
Claim · model-written summary
Extracts of infected wheat spikes induced vegetative dikaryon sporulation.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Extracts from infected wheat spikese0
- Outcome
- Extracts from infected wheat spikes containing the sporulating dikaryon induced the vegetative dikaryon to sporulate.e0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Extracts from infected wheat spikes containing the sporulating dikaryon induced the vegetative dikaryon to sporulate.”
Claim · model-written summary
Bioactive extracts had no apparent effect on monokaryon growth.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Bioactive extracts had no apparent effect on the growth of the monokaryon.e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bioactive extracts had no apparent effect on the growth of the monokaryon.”
t0“wheat plants”
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