Abstract
Verticillium dahliae Kleb.is a soilborne pathogen that cause vascular wilt in chrysanthemumplant (Dendranthema grandiflorum (Ramat.) Kitam). The objective of this research was to study the levels of some organic solutes, such as total protein, total soluble sugars, starch and proline, relative water content, RNA level, malondialdehyde and H2O2 contents in leaves of chrysanthemuminoculated with V. dahliae. Changes of these parameters were measured on 0, 10, 20, 30 and 40 days after inoculation by spectrophotometric analysis. No changes in relative water content, RNA, and protein levels and a slight decrease in chlorophyll level were detected within infected leaf tissue before the appearance of visible wilt. The decrease in relative water content coincided with a sharp build up of proline and total soluble sugars in leaves. The leaf starch and protein levels gradually declined in both healthy and infected plants during the time course of the experiment. However, the decrease was more pronounced in infected plants from the third week after inoculation. A high negative correlation was observed between total soluble sugars and starch contents in leaves of diseased plants (r= 0.764, P<0.001). Changes in malondialdehyde and H2O2 concentration occurred in infected plants between 30-40 days after inoculation, while they did not change in the leaves of control plants. These data suggest the psssible role of senescence during the development of Verticillium wilt syndrome in chrysanthemum.
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Claims 7
Claim · model-written summary
Relative water content, RNA, and protein were unchanged before visible wilt in infected leaves.
- Taxon
- Chrysanthemum
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Chrysanthemumt0 - Interactor
- Verticillium dahliae
Verticillium dahliaet1pathogen - Outcome
- relative water content, RNA, and protein levelse0
- Direction
- No changese0
- Qualifier
- before the appearance of visible wilte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
t0“Chrysanthemum (Dendranthema grandiflorum (Ramat.) Kitam)”
t1“Verticillium dahliae”
e0“No changes in relative water content, RNA, and protein levels and a slight decrease in chlorophyll level were detected within infected leaf tissue before the appearance of visible wilt.”
Claim · model-written summary
Chlorophyll declined slightly before visible wilt in infected leaves.
- Taxon
- ChrysanthemumChrysanthemumt1
- Interactor
- Verticillium dahliaeVerticillium dahliaet0pathogen
- Outcome
- chlorophyll levele0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Verticillium dahliae”
t1“Chrysanthemum”
e0“a slight decrease in chlorophyll level were detected within infected leaf tissue before the appearance of visible wilt”
Claim · model-written summary
Relative water content fell as proline and soluble sugars accumulated in infected leaves.
- Taxon
- ChrysanthemumChrysanthemumt1
- Interactor
- Verticillium dahliaeVerticillium dahliaet0pathogen
- Compound
- proline and total soluble sugarse0
- Outcome
- relative water contente0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Verticillium dahliae”
t1“Chrysanthemum”
e0“The decrease in relative water content coincided with a sharp build up of proline and total soluble sugars in leaves.”
Claim · model-written summary
Leaf starch and protein declined over time in healthy and infected plants, more strongly in infected plants from week three.
- Taxon
- ChrysanthemumChrysanthemumt1
- Interactor
- Verticillium dahliaeVerticillium dahliaet0pathogen
- Outcome
- leaf starch and protein levelse0
- Direction
- declinede0
- Qualifier
- from the third week after inoculatione0
- Comparator
- healthy and infected plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Verticillium dahliae”
t1“Chrysanthemum”
e0“The leaf starch and protein levels gradually declined in both healthy and infected plants during the time course of the experiment. However, the decrease was more pronounced in infected plants from the third week after inoculation.”
Claim · model-written summary
Total soluble sugars and starch were strongly negatively correlated in diseased leaves.
- Taxon
- ChrysanthemumChrysanthemumt1
- Organ / stage
- leavese0
- Interactor
- Verticillium dahliaeVerticillium dahliaet0pathogen
- Outcome
- total soluble sugars and starch contentse0
- Direction
- negativee0
- Value
- r= 0.764e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Verticillium dahliae”
t1“Chrysanthemum”
e0“A high negative correlation was observed between total soluble sugars and starch contents in leaves of diseased plants (r= 0.764, P<0.001).”
Claim · model-written summary
Malondialdehyde and H2O2 concentrations changed in infected plants at 30–40 days but not controls.
- Taxon
- ChrysanthemumChrysanthemumt1
- Treatment
- infected plantse0
- Interactor
- Verticillium dahliaeVerticillium dahliaet0pathogen
- Outcome
- malondialdehyde and H2O2 concentratione0
- Qualifier
- between 30-40 days after inoculatione0
- Comparator
- control plantse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Verticillium dahliae”
t1“Chrysanthemum”
e0“Changes in malondialdehyde and H2O2 concentration occurred in infected plants between 30-40 days after inoculation, while they did not change in the leaves of control plants.”
Claim · model-written summary
The authors suggest senescence contributes to Verticillium wilt development.
- Taxon
- chrysanthemumChrysanthemume0
- Interactor
- VerticilliumVerticilliume0pathogen
- Outcome
- development of Verticillium wilt syndromee0
- Qualifier
- senescencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chrysanthemum”
e0“These data suggest the psssible role of senescence during the development of Verticillium wilt syndrome in chrysanthemum.”