Abstract
The application of organic amendments, biochar, and wood distillate (WD), as well as the exposure to UV-B radiation, are two sustainable ways to enhance soil fertility and increase plant nutraceutical quality, respectively. However, they have always been studied separately, without testing the eventual synergistic or antagonistic effect when applied together. The present study investigated the effects of biochar (2% w/w), WD (1:100), and their combination (BWD) on some biometric and biochemical parameters of basil plants (Ocimum basilicum L.) exposed to different doses of UV-B radiation (0, 1, 2 h d−1; UV-B irradiance of 1.36 W m−2) in controlled conditions. Root and stem length and weight were not affected by soil amendments, while 1 h d−1 UV-B increased the length (+28%) and weight (+62%) of the aerial part. When combining the above- and below-ground factors, a decrease in root length was observed in the 2 h d−1 UV-B-treated plants in both WD (−36%) and BWD (−39%) treatments. The co-application of below- and above-ground treatments generally decreased phenolic and flavonoid concentration in both fully expanded leaves and vegetative shoot apices. This preliminary study highlights an antagonistic action of the combination of the investigated factors, at these doses, on the plant growth and metabolism that should be considered.
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Claims 7
Claim · model-written summary
Root and stem length and weight were not affected by soil amendments in basil.
- Taxon
- Ocimum basilicum L.
Ocimum basilicumt0 - Treatment
- soil amendmentse1
- Outcome
- Root and stem length and weighte1
- Direction
- not affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e1“Root and stem length and weight were not affected by soil amendments”
Claim · model-written summary
One hour per day of UV-B increased the aerial length of basil by 28%.
- Taxon
- Ocimum basilicum L.Ocimum basilicumt0
- Treatment
- 1 h d−1 UV-Be2
- Outcome
- lengthe2
- Direction
- increasede2
- Value
- +28%e2
- Qualifier
- of the aerial parte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e2“1 h d−1 UV-B increased the length (+28%) and weight (+62%) of the aerial part”
Claim · model-written summary
One hour per day of UV-B increased the aerial weight of basil by 62%.
- Taxon
- Ocimum basilicum L.Ocimum basilicumt0
- Treatment
- 1 h d−1 UV-Be2
- Outcome
- weighte2
- Direction
- increasede2
- Value
- +62%e2
- Qualifier
- of the aerial parte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e2“1 h d−1 UV-B increased the length (+28%) and weight (+62%) of the aerial part”
Claim · model-written summary
Wood distillate decreased basil root length by 36% in plants given 2 h per day of UV-B.
- Taxon
- Ocimum basilicum L.Ocimum basilicumt0
- Treatment
- WDe3
- Outcome
- root lengthe3
- Direction
- decreasee3
- Value
- −36%e3
- Qualifier
- 2 h d−1 UV-B-treated plantse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e3“a decrease in root length was observed in the 2 h d−1 UV-B-treated plants in both WD (−36%) and BWD (−39%) treatments”
Claim · model-written summary
Biochar plus wood distillate decreased basil root length by 39% in plants given 2 h per day of UV-B.
- Taxon
- Ocimum basilicum L.Ocimum basilicumt0
- Treatment
- BWDe3
- Outcome
- root lengthe3
- Direction
- decreasee3
- Value
- −39%e3
- Qualifier
- 2 h d−1 UV-B-treated plantse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e3“a decrease in root length was observed in the 2 h d−1 UV-B-treated plants in both WD (−36%) and BWD (−39%) treatments”
Claim · model-written summary
Combined below- and above-ground treatments decreased phenolic and flavonoid concentration in basil leaves and shoot apices.
- Taxon
- Ocimum basilicum L.Ocimum basilicumt0
- Organ / stage
- fully expanded leaves and vegetative shoot apicese4
- Treatment
- co-application of below- and above-ground treatmentse4
- Outcome
- phenolic and flavonoid concentratione4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e4“The co-application of below- and above-ground treatments generally decreased phenolic and flavonoid concentration in both fully expanded leaves and vegetative shoot apices”
Claim · model-written summary
The combination of UV-B and amendments shows an antagonistic action on basil growth and metabolism at these doses.
- Taxon
- Ocimum basilicum L.Ocimum basilicumt0
- Treatment
- combination of the investigated factorse5
- Outcome
- plant growth and metabolisme5
- Direction
- antagonistic actione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Ocimum basilicum L.”
e5“This preliminary study highlights an antagonistic action of the combination of the investigated factors, at these doses, on the plant growth and metabolism that should be considered”
The same questions in other papers
uv · growth · Ocimum basilicum (basil)Results differ
7 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
10 papers more in this group
See all 14 papers →other · growth · Ocimum basilicum (basil)Positive and negative results
3 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
- positive
15 papers more in this group
See all 19 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.