Abstract
Effect of light and darkness on hyphal growth of cucumber downy mildew fungus, Pseudoperonospora cubensis (Berk. et Curt.) Rostow., in the host tissue was examined anatomically. The effect was estimated by counting the number of hyphae which was observed in the stained paraffin section of infected tissue by a microscope. Hyphae and haustoria in the infected tissue kept in both light and dark condition, began to increase in number abruptly from 2 to 3 days after inoculation and continued to increase until 5 days. The hyphae and haustoria in dark condition, however, were about a half in number compared with those in light condition. Some differences of hyphal diameter in average were also observed between the two treatments. It was 5.4μ in lesion kept in light and 4.6μ in darkness. It is speculated that such decrease in hyphal density and diameter in darkness may affect the suppression of lesion development by the dark treatment for the infected cucumber leaves as reported in the previous paper.
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Claims 4
Claim · model-written summary
Hyphae and haustoria in infected cucumber tissue increased in number from 2 to 3 days after inoculation in light and in dark.
- Taxon
- cucumber
Cucumis sativust0 - Organ / stage
- infected tissuee1
- Interactor
- Pseudoperonospora cubensis
Pseudoperonospora cubensise0pathogen - Outcome
- Hyphae and haustoriae1
- Qualifier
- began to increase in number abruptly from 2 to 3 days after inoculatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Downy Mildew Fungus”
e0“hyphal growth of cucumber downy mildew fungus, Pseudoperonospora cubensis (Berk. et Curt.) Rostow., in the host tissue was examined anatomically”
e1“Hyphae and haustoria in the infected tissue kept in both light and dark condition, began to increase in number abruptly from 2 to 3 days after inoculation and continued to increase until 5 days”
Claim · model-written summary
Hyphae and haustoria were about half as numerous in dark condition as in light condition.
- Taxon
- cucumberCucumis sativust0
- Treatment
- dark conditione2
- Interactor
- Pseudoperonospora cubensisPseudoperonospora cubensise0pathogen
- Outcome
- hyphae and haustoriae2
- Direction
- about a halfe2
- Comparator
- light conditione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Downy Mildew Fungus”
e0“hyphal growth of cucumber downy mildew fungus, Pseudoperonospora cubensis (Berk. et Curt.) Rostow., in the host tissue was examined anatomically”
e2“The hyphae and haustoria in dark condition, however, were about a half in number compared with those in light condition”
Claim · model-written summary
Hyphal diameter was lower in darkness (4.6μ) than in light (5.4μ).
- Taxon
- cucumberCucumis sativust0
- Treatment
- darknesse4
- Outcome
- hyphal diametere3
- Direction
- lowerinferrede4
- Value
- 4.6μe4
- Comparator
- lighte4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Downy Mildew Fungus”
e3“Some differences of hyphal diameter in average were also observed between the two treatments”
e4“It was 5.4μ in lesion kept in light and 4.6μ in darkness”
Claim · model-written summary
Decreased hyphal density and diameter in darkness may explain suppression of lesion development in cucumber leaves.
- Taxon
- cucumberCucumis sativust0
- Outcome
- suppression of lesion developmente5
- Qualifier
- decrease in hyphal density and diameter in darknesse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cucumber Downy Mildew Fungus”
e5“It is speculated that such decrease in hyphal density and diameter in darkness may affect the suppression of lesion development by the dark treatment for the infected cucumber leaves”
The same questions in other papers
light · disease · Cucumis sativus (cucumber)Positive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- no effect
- negative
7 papers more in this group
See all 11 papers →light · Pseudoperonospora cubensis · Cucumis sativus (cucumber)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.