Abstract
Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia. The sequence of events in mycelial development appeared to be the same from both types of inoculum. Up to the time of formation of the first haustorium there appeared to be no difference in the infection process in susceptible (B. juncea, B. campestris), moderately susceptible (B. hirta), and resistant (B. napus) hosts. At 2–3 days after inoculation, growth in B. napus ceased and a marked encapsulation formed around each single haustorium. In the other hosts mycelial development increased rapidly after the formation of the first haustorium. Up to 14 haustoria were observed in a single mesophyll cell. Encapsulations were rarely observed around haustoria in susceptible tissue. The massive amount of fungal thallus tolerated by the susceptible hosts emphasizes the highly specialized type of parasitism evolved by A. candida.
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Claims 8
Claim · model-written summary
Mycelial development followed the same sequence from both types of inoculum in Brassica cotyledons.
- Interactor
- Albugo candida
Albugo candidae0pathogen - Outcome
- The sequence of events in mycelial developmente1
- Qualifier
- both types of inoculume1
BrassicaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“The sequence of events in mycelial development appeared to be the same from both types of inoculum”
Claim · model-written summary
Up to haustorium formation the infection process did not differ among susceptible, moderately susceptible and resistant Brassica hosts.
- Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- infection processe1
- Qualifier
- Up to the time of formation of the first haustoriume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“Up to the time of formation of the first haustorium there appeared to be no difference in the infection process in susceptible (B. juncea, B. campestris), moderately susceptible (B. hirta), and resistant (B. napus) hosts”
Claim · model-written summary
In B. napus, mycelial growth ceased 2–3 days after inoculation.
- Taxon
- B. napus
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse1 - Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- growthe1
- Qualifier
- At 2–3 days after inoculatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“At 2–3 days after inoculation, growth in B. napus ceased and a marked encapsulation formed around each single haustorium”
Claim · model-written summary
In B. napus, a marked encapsulation formed around each single haustorium.
- Taxon
- B. napusBrassica napuse1
- Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- encapsulatione1
- Qualifier
- around each single haustoriume1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“At 2–3 days after inoculation, growth in B. napus ceased and a marked encapsulation formed around each single haustorium”
Claim · model-written summary
In the other hosts, mycelial development increased rapidly after the first haustorium formed.
- Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- mycelial developmente1
- Direction
- increasede1
- Qualifier
- after the formation of the first haustoriume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“In the other hosts mycelial development increased rapidly after the formation of the first haustorium”
Claim · model-written summary
Up to 14 haustoria were observed in a single mesophyll cell.
- Organ / stage
- mesophyll celle1
- Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- haustoriae1
- Value
- Up to 14e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“Up to 14 haustoria were observed in a single mesophyll cell”
Claim · model-written summary
Encapsulations were rarely observed around haustoria in susceptible Brassica tissue.
- Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- Encapsulationse1
- Qualifier
- in susceptible tissuee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“Encapsulations were rarely observed around haustoria in susceptible tissue”
Claim · model-written summary
Susceptible hosts tolerated a massive amount of fungal thallus, which the authors relate to a highly specialized type of parasitism.
- Interactor
- Albugo candidaAlbugo candidae0pathogen
- Outcome
- fungal thalluse1
- Qualifier
- highly specialized type of parasitisme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotyledons of four Brassica species were inoculated with zoospores of Albugo candida produced from germinating oospores or zoosporangia”
e1“The massive amount of fungal thallus tolerated by the susceptible hosts emphasizes the highly specialized type of parasitism evolved by A. candida”