Abstract
Abstract Additional artificial ultraviolet-B irradiation (UV-B) is a substitute for the natural UV-B radiation, which is believed to modulate the antioxidants production in plants against the abiotic stress. The present research was formulated by using an indoor UV-B chamber, capable of irradiating UV-B at single wavelength of 315 nm on spearmint. In vitro destructive analysis revealed the reduction in accumulation of chlorophyll a and b as well as carotenoids. However, an elevated levels of phenolic index and total anthocyanins were recorded for both 43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B doses. TBARS assay was carried out to record the lipid peroxidation in the spearmint and likewise, an enhanced secondary metabolites production, an increased lipid peroxidation was seen with the successive increased in the UV–B doses. A remarkable accumulation in the total sugars, reducing sugars and sucrose were also noticed. In vivo analysis revealed a decrease in chlorophyll estimated values as well as an increase of flavanols. Overall leaf fluorescence performance index was improved under both UV-B doses as well as the maximum quantum efficiency of photosystem II. Decreases in the total yield, plant height and length of internode was observed for both UV-B doses however, an enhanced number of stems was recorded for the 43.2 KJ/m 2 UV-B dose. The results of present study not only provided a clear indication of the potential of UV-B in modifying the phytochemicals accumulation in plants but also opened a room for investigating various indoor UV-B doses for future studies of plants and their interaction towards UV-B. Graphical Abstract
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Claims 9
Claim · model-written summary
UV-B reduced chlorophyll a, chlorophyll b and carotenoid accumulation.
- Taxon
- spearmint
Mentha spicatat0 - Treatment
- UV-Be1
- Outcome
- chlorophyll a and b as well as carotenoidse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in accumulation of chlorophyll a and b as well as carotenoids”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
e1“43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B doses”
Claim · model-written summary
Both UV-B doses increased phenolic index and total anthocyanins.
- Taxon
- spearmintMentha spicatat0
- Treatment
- 43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B dosese0
- Outcome
- phenolic index and total anthocyaninse0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“elevated levels of phenolic index and total anthocyanins were recorded for both 43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B doses”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
Claim · model-written summary
Increasing UV-B doses increased lipid peroxidation.
- Taxon
- spearmintMentha spicatat0
- Treatment
- UV–B dosese0
- Outcome
- lipid peroxidatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increased lipid peroxidation was seen with the successive increased in the UV–B doses”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
Claim · model-written summary
Total sugars, reducing sugars and sucrose accumulated.
- Taxon
- spearmintMentha spicatat0
- Treatment
- UV-Be1
- Outcome
- total sugars, reducing sugars and sucrosee0
- Direction
- accumulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A remarkable accumulation in the total sugars, reducing sugars and sucrose were also noticed.”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
e1“43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B doses”
Claim · model-written summary
In vivo chlorophyll estimates decreased.
- Taxon
- spearmintMentha spicatat0
- Treatment
- UV-Be1
- Outcome
- chlorophyll estimated valuese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in chlorophyll estimated values”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
e1“43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B doses”
Claim · model-written summary
In vivo flavanols increased.
- Taxon
- spearmintMentha spicatat0
- Treatment
- UV-Be1
- Outcome
- flavanolse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase of flavanols”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
e1“43.2 KJ/m 2 and 86.4 KJ/m 2 UV-B doses”
Claim · model-written summary
Both UV-B doses improved leaf fluorescence performance index and maximum quantum efficiency of photosystem II.
- Taxon
- spearmintMentha spicatat0
- Treatment
- UV-B dosese0
- Outcome
- leaf fluorescence performance indexe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf fluorescence performance index was improved under both UV-B doses as well as the maximum quantum efficiency of photosystem II”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
Claim · model-written summary
Both UV-B doses decreased yield, height and internode length.
- Taxon
- spearmintMentha spicatat0
- Treatment
- UV-B dosese0
- Outcome
- total yield, plant height and length of internodee0
- Direction
- Decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decreases in the total yield, plant height and length of internode was observed for both UV-B doses”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
Claim · model-written summary
The lower UV-B dose increased stem number.
- Taxon
- spearmintMentha spicatat0
- Treatment
- 43.2 KJ/m 2 UV-B dosee0
- Outcome
- number of stemse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an enhanced number of stems was recorded for the 43.2 KJ/m 2 UV-B dose”
t0“spearmint’s (Mentha spicata L.) morpho-physiological traits and secondary metabolites production”
The same questions in other papers
uv · yield · Mentha spicata (spearmint)Positive and negative results
1 in the opposite direction
- positive
uv · molecular: metabolites · Mentha spicata (spearmint)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
uv · quality: phytochemicals · Mentha spicata (spearmint)Results agree
1 paper in the same direction as this paper
- positive
uv · physiology: pigments · Mentha spicata (spearmint)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.