Abstract
Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation to understand alterations of primary- and secondary-metabolism such as carbohydrates, phenolic compounds and polyamines. UV-B doses with a UV-B lamp (1.2 W m-2) were adjusted between 0 to 9 hr. The soluble sugars and starch contents in pepper leaves were highly influenced by UV-B treatment. The soluble sugars altered from 6.7 mg g-1 fw to 5.2 mg g-1 fw after 9 hrs of UV-B exposure. The starch contents after 3 hrs of UV-B exposure changed from 17.7 mg g-1 fw to 12.3 mg g-1 fw and then remained unchanged. The absorbance of UV-absorbing compounds reached initially maximum at all wavelengths read. On the basis of this result, we analyzed total phenolics, anthocyanin and simple free phenolic acids. Anthocyanin and free phenolic acids responded sensitively with a steady increase during UV-B treatment, although anthocyanin contents declined highly after 3 hrs of treatment. Whereas, there is no alteration of total phenolics (as gallic acid equivalent) caused by UV-B. Free polyamine levels in leaves increased rapidly and highly when UV-B was treated. The most prominent changes in polyamine induction were putrescine and spermidine (+ 70 %) after 3 hrs and spermine (+ 150 %) after 6 hrs.
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Claims 11
Claim · model-written summary
UV-B treatment highly influenced soluble sugar and starch contents in pepper leaves.
- Taxon
- Capsicum annuum
Capsicum annuume0 - Organ / stage
- pepper leavese1
- Treatment
- UV-B treatmente1
- Outcome
- soluble sugars and starch contentse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e1“The soluble sugars and starch contents in pepper leaves were highly influenced by UV-B treatment”
Claim · model-written summary
Soluble sugars decreased from 6.7 to 5.2 mg g-1 fw after 9 hours of UV-B exposure.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-B exposuree1
- Outcome
- soluble sugarse1
- Direction
- alterede1
- Value
- 6.7 mg g-1 fw to 5.2 mg g-1 fwe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e1“The soluble sugars altered from 6.7 mg g-1 fw to 5.2 mg g-1 fw after 9 hrs of UV-B exposure”
Claim · model-written summary
Starch contents changed from 17.7 to 12.3 mg g-1 fw after 3 hours of UV-B exposure.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-B exposuree2
- Outcome
- starch contentse2
- Direction
- changede2
- Value
- 17.7 mg g-1 fw to 12.3 mg g-1 fwe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e2“The starch contents after 3 hrs of UV-B exposure changed from 17.7 mg g-1 fw to 12.3 mg g-1 fw and then remained unchanged”
Claim · model-written summary
Starch contents remained unchanged after the initial change under UV-B exposure.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-B exposuree2
- Outcome
- starch contentse2
- Direction
- remained unchangede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e2“The starch contents after 3 hrs of UV-B exposure changed from 17.7 mg g-1 fw to 12.3 mg g-1 fw and then remained unchanged”
Claim · model-written summary
Absorbance of UV-absorbing compounds reached an initial maximum at all wavelengths read.
- Taxon
- Capsicum annuumCapsicum annuume0
- Outcome
- absorbance of UV-absorbing compoundse3
- Qualifier
- reached initially maximum at all wavelengths reade3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e3“The absorbance of UV-absorbing compounds reached initially maximum at all wavelengths read”
Claim · model-written summary
Anthocyanin and free phenolic acids increased steadily during UV-B treatment.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-B treatmente4
- Outcome
- Anthocyanin and free phenolic acidse4
- Direction
- steady increasee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e4“Anthocyanin and free phenolic acids responded sensitively with a steady increase during UV-B treatment”
Claim · model-written summary
Anthocyanin contents declined after 3 hours of treatment.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 3 hrs of treatmente5
- Outcome
- anthocyanin contentse5
- Direction
- declinede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e5“although anthocyanin contents declined highly after 3 hrs of treatment”
Claim · model-written summary
UV-B caused no alteration of total phenolics, expressed as gallic acid equivalent.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-Be6
- Outcome
- total phenolicse6
- Direction
- no alteratione6
- Qualifier
- as gallic acid equivalente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e6“Whereas, there is no alteration of total phenolics (as gallic acid equivalent) caused by UV-B”
Claim · model-written summary
Free polyamine levels in leaves increased rapidly and highly under UV-B.
- Taxon
- Capsicum annuumCapsicum annuume0
- Organ / stage
- leavese7
- Treatment
- UV-B was treatede7
- Outcome
- Free polyamine levelse7
- Direction
- increasede7
- Qualifier
- rapidly and highlye7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e7“Free polyamine levels in leaves increased rapidly and highly when UV-B was treated”
Claim · model-written summary
Putrescine and spermidine increased by about 70% after 3 hours of UV-B treatment.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-B was treatede7
- Outcome
- putrescine and spermidinee1
- Direction
- increaseinferrede1
- Value
- + 70 %e1
- Qualifier
- after 3 hrse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e7“Free polyamine levels in leaves increased rapidly and highly when UV-B was treated”
e1“The most prominent changes in polyamine induction were putrescine and spermidine (+ 70 %) after 3 hrs and spermine (+ 150 %) after 6 hrs”
Claim · model-written summary
Spermine increased by about 150% after 6 hours of UV-B treatment.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- UV-B was treatede7
- Outcome
- sperminee1
- Direction
- increaseinferrede1
- Value
- + 150 %e1
- Qualifier
- after 6 hrse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pepper plants (Capsicum annuum, cv. Manitta) were subjected to different intensities of UV-B radiation”
e7“Free polyamine levels in leaves increased rapidly and highly when UV-B was treated”
e1“The most prominent changes in polyamine induction were putrescine and spermidine (+ 70 %) after 3 hrs and spermine (+ 150 %) after 6 hrs”
The same questions in other papers
uv · quality: phytochemicals · Capsicum annuum (sweet pepper)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 papers →uv · quality: sugar starch · Capsicum annuum (sweet pepper)Results agree
1 paper in the same direction as this paper
- no effect
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.