Abstract
Verticillium dahliae Kleb.harms seriously production of cotton.Thirty-one cotton cultivars with different resistance were used in the greenhouse,aimed to analyse the resistance to Verticilium wilt in cotton.Tissue structure was studied to realize the resistance mechanism of cotton to Verticilium wilt using the method of root scanning and paraffin slice.The results showed that:the density of roots which absorbed water and nutrition had correlation with the disease index,r=0.923.There was significant difference in total root length,total projective area,total surface area and absorbable root length density among the resistance,tolerance and susceptible cultivars.But the difference between those of the tolerance and susceptible cultivars were not significant.The density of xylem parenchyma cells and vessel numbers in root and stem of resistant cultivars were the biggest,that of tolerant cultivars were the next and that of susceptible ones were the least,but the diameter of vessels were contrary.The absorbable root length density,density of xylem parenchyma cells and vessel numbers in root and stem can be used as measuring index of resistance to verticillium wilt in cotton.
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Claims 6
Claim · model-written summary
Absorbable root density correlated with disease index.
Not reportedTaxonDirection
Verbatim
e0“the density of roots which absorbed water and nutrition had correlation with the disease index,r=0.923”
Claim · model-written summary
Total root length, projective area, surface area and absorbable root length density differed significantly among resistance classes.
- Material
- resistance,tolerance and susceptible cultivarse0
- Outcome
- total root length,total projective area,total surface area and absorbable root length densitye0
Not reportedTaxonDirection
Verbatim
e0“There was significant difference in total root length,total projective area,total surface area and absorbable root length density among the resistance,tolerance and susceptible cultivars”
Claim · model-written summary
These root measures did not differ significantly between tolerant and susceptible cultivars.
Not reportedTaxonDirection
Verbatim
e0“the difference between those of the tolerance and susceptible cultivars were not significant”
Claim · model-written summary
Resistant cultivars had the greatest xylem parenchyma cell density and vessel numbers, followed by tolerant and susceptible cultivars.
- Material
- resistant cultivarse0
- Organ / stage
- root and steme0
- Outcome
- density of xylem parenchyma cells and vessel numberse0
- Direction
- the biggeste0
- Comparator
- tolerant cultivarse0
Not reportedTaxon
Verbatim
e0“The density of xylem parenchyma cells and vessel numbers in root and stem of resistant cultivars were the biggest,that of tolerant cultivars were the next and that of susceptible ones were the least”
Claim · model-written summary
Vessel diameter followed the reverse ranking of resistance classes.
Not reportedTaxon
Verbatim
e0“the diameter of vessels were contrary”
Claim · model-written summary
Absorbable root length density, xylem cell density and vessel number were proposed as resistance measures.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- measuring index of resistance to verticillium wilte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The absorbable root length density,density of xylem parenchyma cells and vessel numbers in root and stem can be used as measuring index of resistance to verticillium wilt in cotton”