Abstract
It is not clear so far whether alteration of leaf micromorphology and surface wax chemistry due to the impact of environmental factors, such as UV-B radiation, affects retention and rainfastness of applied pesticide solutions. In this study; UV-B treated and untreated adaxial leaf surfaces of apple seedlings (Malus domestica Borkh.) were characterized in terms of chemical composition, micromorphological fine structure, hydrophobicity, and wettability. Furthermore, the retention and rainfastness of applied fungicide mancozeb were studied. The samples were examined 0, 24 and 48 h after ultraviolet (UV)-B radiation (0.022 kW m(-2) for 150 min) The total wax mass, recovered from the adaxial leaf surface, amounted from 0.38 microg cm(-2) (control) up to 0.49 microg cm(-2) (24 h). Chemical composition of surface wax altered, whereas the contact angle of applied water droplets on leaf surface of UV-B treated plants did not change significantly compared to the control. The alteration of surface wax quantity and quality significantly affected retention of a.i.; it increased at a sampling time of 24 h after UV-B irradiation, whereas rainfastness of the fungicide spray solution was not significantly influenced.
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Claims 5
Claim · model-written summary
UV-B treatment raised the total wax mass on the adaxial apple leaf surface from 0.38 microg cm(-2) in the control to up to 0.49 microg cm(-2) at 24 h.
- Taxon
- apple seedlings
Malus domesticae1 - Organ / stage
- adaxial leaf surfacee0
- Treatment
- UV-Be1
- Outcome
- total wax masse0
- Direction
- up toe0
- Value
- 0.49 microg cm(-2)e0
- Qualifier
- 0.38 microg cm(-2)e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total wax mass, recovered from the adaxial leaf surface, amounted from 0.38 microg cm(-2) (control) up to 0.49 microg cm(-2) (24 h)”
e1“UV-B treated and untreated adaxial leaf surfaces of apple seedlings”
Claim · model-written summary
The chemical composition of the surface wax of apple leaves was altered by UV-B.
- Taxon
- apple seedlingsMalus domesticae1
- Treatment
- UV-Be0
- Outcome
- Chemical composition of surface waxe0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical composition of surface wax altered, whereas the contact angle of applied water droplets on leaf surface of UV-B treated plants did not change significantly compared to the control”
e1“UV-B treated and untreated adaxial leaf surfaces of apple seedlings”
Claim · model-written summary
The contact angle of water droplets on the leaf surface of UV-B treated apple plants did not change significantly compared with the control.
- Taxon
- apple seedlingsMalus domesticae1
- Treatment
- UV-Be0
- Outcome
- contact angle of applied water dropletse0
- Direction
- did not changee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical composition of surface wax altered, whereas the contact angle of applied water droplets on leaf surface of UV-B treated plants did not change significantly compared to the control”
e1“UV-B treated and untreated adaxial leaf surfaces of apple seedlings”
Claim · model-written summary
Retention of the fungicide active ingredient on apple leaves significantly increased 24 h after UV-B irradiation.
- Taxon
- apple seedlingsMalus domesticae1
- Treatment
- UV-B irradiatione0
- Outcome
- retention of a.i.e0
- Direction
- increasede0
- Qualifier
- 24 he0
- Comparator
- untreatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“retention of a.i.; it increased at a sampling time of 24 h after UV-B irradiation”
e1“UV-B treated and untreated adaxial leaf surfaces of apple seedlings”
Claim · model-written summary
Rainfastness of the fungicide spray solution on apple leaves was not significantly influenced by UV-B irradiation.
- Taxon
- apple seedlingsMalus domesticae1
- Treatment
- UV-B irradiatione0
- Outcome
- rainfastness of the fungicide spray solutione0
- Direction
- not significantly influencede0
- Comparator
- untreatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“24 h after UV-B irradiation, whereas rainfastness of the fungicide spray solution was not significantly influenced”
e1“UV-B treated and untreated adaxial leaf surfaces of apple seedlings”
The same questions in other papers
uv · molecular: metabolites · Malus domestica (apple)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.