Abstract
Accumulation and metabolic profile of phenolic compounds (PheCs; serving as UV-screening pigments and antioxidants) as well as carbon fixation rate (An) and plant growth are sensitive to irradiance and temperature. Since these factors are naturally co-acting in the environment, it is worthy to study the combined effects of these environmental factors to assess their possible physiological consequences. We investigated how low and high irradiance in combination with different temperatures modify the metabolic profile of PheCs and expression of genes involved in the antioxidative enzyme and PheCs biosynthesis, in relation to photosynthetic activity and availability of non-structural carbohydrates (NSC) in spring barley seedlings. High irradiance positively affected An, NSC, PheCs content, and antioxidant activity (AOX). High temperature led to decreased An, NSC, and increased dark respiration, whilst low temperature was accompanied by reduction of UV-A shielding but increase of PheCs content and AOX. Besides that, irradiance and temperature caused changes in the metabolic profile of PheCs, particularly alteration in homoorientin/isovitexin derivatives ratio, possibly related to demands on AOX-based protection. Moreover, we also observed changes in the ratio of sinapoyl-/feruloyl- acylated flavonoids, the function of which is not yet known. The data also strongly suggested that the NSC content may support the PheCs production.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
High irradiance positively affected carbon fixation, non-structural carbohydrates and phenolic content.
- Taxon
- spring barley
.jpg?width=60)
Hordeum vulgaree1 - Organ / stage
- seedlingse1
- Treatment
- High irradiancee0
- Outcome
- An, NSC, PheCs contente0
- Direction
- positively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“High irradiance positively affected An, NSC, PheCs content, and antioxidant activity (AOX).”
e1“in spring barley seedlings”
Claim · model-written summary
High irradiance positively affected antioxidant activity.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- High irradiancee0
- Outcome
- antioxidant activitye0
- Direction
- positively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High irradiance positively affected An, NSC, PheCs content, and antioxidant activity (AOX).”
e1“in spring barley seedlings”
Claim · model-written summary
High temperature decreased carbon fixation and non-structural carbohydrates.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- High temperaturee0
- Outcome
- An, NSCe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High temperature led to decreased An, NSC, and increased dark respiration”
e1“in spring barley seedlings”
Claim · model-written summary
High temperature increased dark respiration.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- High temperaturee0
- Outcome
- dark respiratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High temperature led to decreased An, NSC, and increased dark respiration”
e1“in spring barley seedlings”
Claim · model-written summary
Low temperature reduced UV-A shielding.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- low temperaturee0
- Outcome
- UV-A shieldinge0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low temperature was accompanied by reduction of UV-A shielding but increase of PheCs content and AOX.”
e1“in spring barley seedlings”
Claim · model-written summary
Low temperature increased phenolic content and antioxidant activity.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- low temperaturee0
- Outcome
- PheCs content and AOXe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low temperature was accompanied by reduction of UV-A shielding but increase of PheCs content and AOX.”
e1“in spring barley seedlings”
Claim · model-written summary
Irradiance and temperature altered the homoorientin/isovitexin derivative ratio, possibly in relation to antioxidant protection demands.
- Taxon
- spring barleyHordeum vulgaree1
- Treatment
- irradiance and temperaturee0
- Outcome
- homoorientin/isovitexin derivatives ratioe0
- Qualifier
- possibly related to demands on AOX-based protectione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irradiance and temperature caused changes in the metabolic profile of PheCs, particularly alteration in homoorientin/isovitexin derivatives ratio, possibly related to demands on AOX-based protection.”
e1“in spring barley seedlings”
Claim · model-written summary
The sinapoyl-/feruloyl-acylated flavonoid ratio changed, with its function unknown.
- Taxon
- spring barleyHordeum vulgaree1
- Outcome
- ratio of sinapoyl-/feruloyl- acylated flavonoidse0
- Qualifier
- the function of which is not yet knowne0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we also observed changes in the ratio of sinapoyl-/feruloyl- acylated flavonoids, the function of which is not yet known.”
e1“in spring barley seedlings”
Claim · model-written summary
The data suggested that non-structural carbohydrate content may support phenolic production.
- Taxon
- spring barleyHordeum vulgaree1
- Compound
- NSCe0
- Outcome
- PheCs productione0
- Qualifier
- may supporte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The data also strongly suggested that the NSC content may support the PheCs production.”
e1“in spring barley seedlings”
The same questions in other papers
light · quality: sugar starch · Hordeum vulgare (barley)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- no effect
1 paper more in this group
See all 5 papers →light · quality: phytochemicals · Hordeum vulgare (barley)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
heat · quality: sugar starch · Hordeum vulgare (barley)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 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.