Abstract
Objective The objective of the experiment was to investigate the inducing effects of benzothiadiazole (BTH), salicylic acid (SA) and nanometer silicon (SiO2) spraying on disease resistance of melon to powdery mildew and its relationship to hydroxyproline-rich glycoprotein(HRGP) and lignin contents in leaves. Method Two melon cultivars with different powder mildew susceptibilities, Yindi and Kalakesai, were employed as materials. At the fifth day after BTH, SA and SiO2 spraying, seedlings were inoculated with Sphaerotheca fuliginea, and disease indexes, leaf lignin and HRGP contents were determined for four times at alternate days. Result BTH and SA spraying significantly decreased disease indexes of powdery mildew in melon seedlings especially by BTH spraying and on the resistant cultivar, while SiO2 spraying showed a significant effect only in the initial days after treatment. Leaf lignin and HRGP content increased significantly and systemically in melon seedlings induced by Sphaerotheca fuliginea inoculation and BTH, SA spraying, while SiO2 had no such effect. The accumulation of lignin and HRGP in leaf cell wall was synchronous obviously, and was higher in the resistant cultivar than in the susceptible one. Conclusion The accumulation of HRGP and the deposition of lignin in cell wall of melon leaves are related to its resistant reactions to powdery mildew, and it is one of the important biochemical mechanisms in melon-Sphaerotheca fuliginea interactions.
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Claims 9
Claim · model-written summary
BTH spraying significantly decreased powdery mildew disease indexes in melon seedlings.
- Taxon
- melon seedlings
.jpg?width=60)
Cucumis meloe0 - Treatment
- BTH sprayinge0
- Outcome
- disease indexes of powdery mildewe0
- Direction
- decreasede0
- Qualifier
- resistant cultivare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“BTH and SA spraying significantly decreased disease indexes of powdery mildew in melon seedlings especially by BTH spraying and on the resistant cultivar”
Claim · model-written summary
SA spraying significantly decreased powdery mildew disease indexes in melon seedlings.
- Taxon
- melon seedlingsCucumis meloe0
- Treatment
- SA sprayinge0
- Outcome
- disease indexes of powdery mildewe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BTH and SA spraying significantly decreased disease indexes of powdery mildew in melon seedlings”
Claim · model-written summary
SiO2 spraying significantly affected powdery mildew disease indexes only in initial days after treatment.
- Taxon
- melon seedlingsCucumis meloe1
- Treatment
- SiO2 sprayinge0
- Outcome
- disease indexes of powdery mildewe1
- Qualifier
- initial days after treatmente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SiO2 spraying showed a significant effect only in the initial days after treatment.”
e1“disease indexes of powdery mildew in melon seedlings”
Claim · model-written summary
Sphaerotheca fuliginea inoculation significantly increased leaf lignin and HRGP content in melon seedlings.
- Taxon
- melon seedlingsCucumis meloe0
- Treatment
- Sphaerotheca fuliginea inoculatione0
- Interactor
- Sphaerotheca fuliginea
Podosphaera fuligineae0pathogen - Outcome
- Leaf lignin and HRGP contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf lignin and HRGP content increased significantly and systemically in melon seedlings induced by Sphaerotheca fuliginea inoculation and BTH, SA spraying”
Claim · model-written summary
BTH spraying significantly increased leaf lignin and HRGP content in melon seedlings.
- Taxon
- melon seedlingsCucumis meloe0
- Treatment
- BTHe0
- Outcome
- Leaf lignin and HRGP contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf lignin and HRGP content increased significantly and systemically in melon seedlings induced by Sphaerotheca fuliginea inoculation and BTH, SA spraying”
Claim · model-written summary
SA spraying significantly increased leaf lignin and HRGP content in melon seedlings.
- Taxon
- melon seedlingsCucumis meloe0
- Treatment
- SA sprayinge0
- Outcome
- Leaf lignin and HRGP contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf lignin and HRGP content increased significantly and systemically in melon seedlings induced by Sphaerotheca fuliginea inoculation and BTH, SA spraying”
Claim · model-written summary
SiO2 spraying did not increase leaf lignin and HRGP content in melon seedlings.
- Taxon
- melon seedlingsCucumis meloe1
- Treatment
- SiO2e0
- Outcome
- Leaf lignin and HRGP contente1
- Direction
- no such effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while SiO2 had no such effect.”
e1“Leaf lignin and HRGP content increased significantly and systemically in melon seedlings”
Claim · model-written summary
Leaf cell wall lignin and HRGP accumulation was higher in the resistant melon cultivar than the susceptible cultivar.
- Taxon
- melon seedlingsCucumis meloe1
- Material
- resistant cultivare0
- Outcome
- accumulation of lignin and HRGP in leaf cell walle0
- Direction
- highere0
- Comparator
- susceptible onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of lignin and HRGP in leaf cell wall was synchronous obviously, and was higher in the resistant cultivar than in the susceptible one.”
e1“in melon seedlings induced by Sphaerotheca fuliginea”
Claim · model-written summary
The authors link leaf wall HRGP and lignin accumulation with melon resistance to powdery mildew.
- Taxon
- melonCucumis meloe0
- Interactor
- Sphaerotheca fuligineaPodosphaera fuligineae0pathogen
- Outcome
- resistant reactions to powdery mildewe0
- Qualifier
- accumulation of HRGP and the deposition of lignin in cell walle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of HRGP and the deposition of lignin in cell wall of melon leaves are related to its resistant reactions to powdery mildew, and it is one of the important biochemical mechanisms in melon-Sphaerotheca fuliginea interactions.”
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