Abstract
ABSTRACT Broccoli is resistant to Verticillium dahliae infection and does not express wilt symptoms. Incorporation of broccoli residues reduces soil populations of V. dahliae. The effects of broccoli residue were tested on the colonization of roots by V. dahliae, plant growth response, and disease incidence of both broccoli and cauliflower in soils with different levels of V. dahliae inoculum and with or without fresh broccoli residue amendments. The three soils included a low-Verticillium soil, a high-Verticillium soil, and a broccoli-rotation soil (soil from a field after two broccoli crops) with an average of 13, 38, and below-detectable levels of microsclerotia per g of soil, respectively. Cauliflower plants in broccoli-amended high-Verticillium soil had significantly (P </= 0.05) lower wilt incidence and severity than did plants in unamended soil. An immunohistochemical staining assay utilizing a monoclonal antibody specific to V. dahliae was used to determine colonization of the root cortex. Despite the absence of wilt symptoms, broccoli roots were colonized by V. dahliae. In high-Verticillium soil, the broccoli residue amendment caused a marked reduction in colonization rate of V. dahliae per unit of inoculum on both cauliflower and broccoli roots. In addition to its detrimental effects on the viability of microsclerotia in soil, broccoli residue may also have an inhibitory effect on the root-colonizing potential of surviving microsclerotia.
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Claims 5
Claim · model-written summary
Broccoli-amended high-Verticillium soil lowered wilt incidence and severity in cauliflower compared with unamended soil.
- Taxon
- Cauliflower
Brassica oleracea var. botrytise1 - Treatment
- broccoli-amendede1
- Interactor
- VerticilliumVerticilliume1pathogen
- Outcome
- wilt incidence and severitye1
- Direction
- lowere1
- Qualifier
- P </= 0.05e1
- Comparator
- unamended soile1
- Setting
- high-Verticillium soile1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Cauliflower plants in broccoli-amended high-Verticillium soil had significantly (P </= 0.05) lower wilt incidence and severity than did plants in unamended soil”
Claim · model-written summary
Broccoli roots were colonized by Verticillium dahliae although broccoli showed no wilt symptoms.
- Taxon
- broccoli
Brassica oleracea var. italicae2 - Interactor
- V. dahliae
Verticillium dahliaee2pathogen - Outcome
- broccoli roots were colonizede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Despite the absence of wilt symptoms, broccoli roots were colonized by V. dahliae”
Claim · model-written summary
In high-Verticillium soil, broccoli residue amendment markedly reduced the colonization rate of V. dahliae per unit of inoculum on cauliflower and broccoli roots.
- Taxon
- cauliflowerBrassica oleracea var. botrytise3
- Treatment
- broccoli residue amendmente3
- Interactor
- V. dahliaeVerticillium dahliaee3pathogen
- Outcome
- colonization rate of V. dahliae per unit of inoculume3
- Direction
- reductione3
- Qualifier
- on both cauliflower and broccoli rootse3
- Setting
- high-Verticillium soile3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“In high-Verticillium soil, the broccoli residue amendment caused a marked reduction in colonization rate of V. dahliae per unit of inoculum on both cauliflower and broccoli roots”
Claim · model-written summary
Broccoli residue had detrimental effects on the viability of microsclerotia in soil.
- Taxon
- broccoliBrassica oleracea var. italicae4
- Treatment
- broccoli residuee4
- Outcome
- viability of microsclerotia in soile4
- Direction
- detrimental effectse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In addition to its detrimental effects on the viability of microsclerotia in soil, broccoli residue may also have an inhibitory effect on the root-colonizing potential of surviving microsclerotia”
Claim · model-written summary
Broccoli residue may inhibit the root-colonizing potential of surviving microsclerotia.
- Taxon
- broccoliBrassica oleracea var. italicae4
- Treatment
- broccoli residuee4
- Outcome
- root-colonizing potential of surviving microsclerotiae4
- Qualifier
- may also have an inhibitory effecte4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“In addition to its detrimental effects on the viability of microsclerotia in soil, broccoli residue may also have an inhibitory effect on the root-colonizing potential of surviving microsclerotia”
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3 papers in the same direction as this paper
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- 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.