Abstract
The present investigation studied the mechanism of resistance to Fusarium oxysporum f.sp.vasinfectum induced by some chitosan derivatives in susceptible cotton plants. Pretreating cotton seeds with chitosan markedly increased cotton resistance to vascular wilt caused by Fusarium oxysporum f.sp. vasinfectum. The five chitosan derivatives tested repressed the pathogen mycelial growth. Chitosans 3, 4 and 8 had a disease score of 0.5:tO.02, 0.6:tO.5 and 0.0 respectively, indicating that the host plants were free from visual symptoms and that these chitosans were the most effective in controlling Fusarium wilt disease. Phytoalexin (gossypol) production was greatly increased with a maximum of 1.16 mg/5gmfresh root tissue in chitosan-treated plants. The level of gossypol was higher in the roots than in the stems and the maximum production of gossypol was achieved in cotton plants treated with the chitosan 3, 4 and 8 and inoculated with the pathogen spores as compared with uninoculated plants.
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Claims 8
Claim · model-written summary
Chitosan seed pretreatment increased cotton resistance to vascular wilt.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- chitosane0
- Interactor
- Fusarium oxysporum f.sp. vasinfectumFusarium oxysporum f. sp. vasinfectume0pathogen
- Outcome
- cotton resistance to vascular wilte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretreating cotton seeds with chitosan markedly increased cotton resistance to vascular wilt caused by Fusarium oxysporum f.sp. vasinfectum.”
Claim · model-written summary
Five chitosan derivatives repressed pathogen mycelial growth.
Not reportedTaxonComparator
Verbatim
e0“The five chitosan derivatives tested repressed the pathogen mycelial growth.”
Claim · model-written summary
Chitosan 3 produced a disease score of 0.5:tO.02.
Not reportedTaxon
Verbatim
e0“Chitosans 3, 4 and 8 had a disease score of 0.5:tO.02, 0.6:tO.5 and 0.0 respectively, indicating that the host plants were free from visual symptoms and that these chitosans were the most effective in controlling Fusarium wilt disease.”
Claim · model-written summary
Chitosan 4 produced a disease score of 0.6:tO.5.
Not reportedTaxon
Verbatim
e0“Chitosans 3, 4 and 8 had a disease score of 0.5:tO.02, 0.6:tO.5 and 0.0 respectively, indicating that the host plants were free from visual symptoms and that these chitosans were the most effective in controlling Fusarium wilt disease.”
Claim · model-written summary
Chitosan 8 produced a disease score of 0.0.
Not reportedTaxon
Verbatim
e0“Chitosans 3, 4 and 8 had a disease score of 0.5:tO.02, 0.6:tO.5 and 0.0 respectively, indicating that the host plants were free from visual symptoms and that these chitosans were the most effective in controlling Fusarium wilt disease.”
Claim · model-written summary
Chitosan treatment greatly increased phytoalexin gossypol production.
- Organ / stage
- root tissuee0
- Treatment
- chitosan-treatede0
- Outcome
- Phytoalexin (gossypol) productione0
- Direction
- increasede0
- Value
- 1.16 mg/5gmfresh root tissuee0
Not reportedTaxonComparator
Verbatim
e0“Phytoalexin (gossypol) production was greatly increased with a maximum of 1.16 mg/5gmfresh root tissue in chitosan-treated plants.”
Claim · model-written summary
Gossypol level was higher in roots than stems.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- rootse0
- Outcome
- level of gossypole0
- Direction
- highere0
- Comparator
- stemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The level of gossypol was higher in the roots than in the stems and the maximum production of gossypol was achieved in cotton plants treated with the chitosan 3, 4 and 8 and inoculated with the pathogen spores as compared with uninoculated plants.”
Claim · model-written summary
Gossypol production peaked with chitosans 3, 4 and 8 plus pathogen inoculation versus uninoculated plants.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- chitosan 3, 4 and 8 and inoculated with the pathogen sporese0
- Outcome
- production of gossypole0
- Direction
- maximume0
- Comparator
- uninoculated plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The level of gossypol was higher in the roots than in the stems and the maximum production of gossypol was achieved in cotton plants treated with the chitosan 3, 4 and 8 and inoculated with the pathogen spores as compared with uninoculated plants.”
The same questions in other papers
inoculation · yield · Gossypium hirsutum (cotton)Positive and negative results
45 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
46 papers more in this group
See all 50 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.