Abstract
Current and projected increases in ultraviolet-B (UV-B; 280-315 nm) radiation may alter crop growth and yield by modifying the physiological and biochemical functions. This study was conducted to assess the possibility of alleviating the negative effects of supplemental UV-B (sUV-B; 7.2 kJ m⁻² day⁻¹; 280-315 nm) on radish (Raphanus sativus var Pusa Himani) by modifying soil nitrogen (N), phosphorus (P) and potassium (K) levels. The N, P and K treatments were recommended dose of N, P and K, 1.5 times recommended dose of N, P and K, 1.5 times recommended dose of N and 1.5 times recommended dose of K. Plants showed variations in their response to UV-B radiation under varying soil NPK levels. The minimum damaging effects of sUV-B on photosynthesis rate and stomatal conductance coupled with minimum reduction in chlorophyll content were recorded for plants grown at recommended dose of NPK. Flavonoids increased under sUV-B except in plants grown at 1.5 times recommended dose of N. Lipid peroxidation (LPO) also increased in response to sUV-B at all NPK levels with maximum at 1.5 times recommended dose of K and minimum at recommended dose of NPK. This study revealed that sUV-B radiation negatively affected the radish plants by reducing the photosynthetic efficiency and increasing LPO. The plants grown at 1.5 times recommended dose of NPK/N/K could not enhance antioxidative potential to the extent as recorded at recommended dose of NPK and hence showed more sensitivity to sUV-B.
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Claims 8
Claim · model-written summary
Recommended NPK minimized UV-B damage to photosynthesis rate and stomatal conductance.
- Taxon
- radish
Raphanus sativuse1 - Treatment
- recommended dose of NPKe0
- Outcome
- photosynthesis rate and stomatal conductancee0
- Direction
- minimum damaging effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The minimum damaging effects of sUV-B on photosynthesis rate and stomatal conductance coupled with minimum reduction in chlorophyll content were recorded for plants grown at recommended dose of NPK”
e1“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
Recommended NPK minimized UV-B reduction in chlorophyll content.
- Taxon
- radishRaphanus sativuse1
- Treatment
- recommended dose of NPKe0
- Outcome
- chlorophyll contente0
- Direction
- minimum reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“minimum reduction in chlorophyll content were recorded for plants grown at recommended dose of NPK”
e1“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
UV-B increased flavonoids except with 1.5 times recommended N.
- Taxon
- radishRaphanus sativuse1
- Treatment
- sUV-Be0
- Outcome
- Flavonoidse0
- Direction
- increasede0
- Qualifier
- except in plants grown at 1.5 times recommended dose of Ne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Flavonoids increased under sUV-B except in plants grown at 1.5 times recommended dose of N”
e1“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
UV-B increased lipid peroxidation across all NPK levels.
- Taxon
- radishRaphanus sativuse1
- Treatment
- sUV-Be0
- Outcome
- Lipid peroxidation (LPO)e0
- Direction
- increasede0
- Qualifier
- all NPK levelse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lipid peroxidation (LPO) also increased in response to sUV-B at all NPK levels”
e1“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
UV-B lipid peroxidation was greatest at 1.5 times recommended K.
- Taxon
- radishRaphanus sativuse2
- Treatment
- 1.5 times recommended dose of Ke0
- Outcome
- Lipid peroxidation (LPO)e1
- Direction
- maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum at 1.5 times recommended dose of K and minimum at recommended dose of NPK”
e1“Lipid peroxidation (LPO)”
e2“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
UV-B lipid peroxidation was lowest at recommended NPK.
- Taxon
- radishRaphanus sativuse2
- Treatment
- recommended dose of NPKe0
- Outcome
- Lipid peroxidation (LPO)e1
- Direction
- minimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum at 1.5 times recommended dose of K and minimum at recommended dose of NPK”
e1“Lipid peroxidation (LPO)”
e2“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
UV-B reduced radish photosynthetic efficiency.
- Taxon
- radishRaphanus sativuse1
- Treatment
- sUV-B radiatione0
- Outcome
- photosynthetic efficiencye0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sUV-B radiation negatively affected the radish plants by reducing the photosynthetic efficiency”
e1“radish (Raphanus sativus var Pusa Himani)”
Claim · model-written summary
Higher NPK, N, or K doses had weaker antioxidative potential and greater UV-B sensitivity than recommended NPK.
- Taxon
- radishRaphanus sativuse1
- Outcome
- antioxidative potentiale0
- Direction
- could not enhancee0
- Comparator
- recommended dose of NPKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants grown at 1.5 times recommended dose of NPK/N/K could not enhance antioxidative potential to the extent as recorded at recommended dose of NPK and hence showed more sensitivity to sUV-B”
e1“radish (Raphanus sativus var Pusa Himani)”
The same questions in other papers
radiation · physiology: photosynthesis · Raphanus sativus (radish)Positive and negative results
1 in the opposite direction
- positive
fertilization · physiology: pigments · Raphanus sativus (radish)Positive and negative results
11 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
10 papers more in this group
See all 14 papers →fertilization · physiology: photosynthesis · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- 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.