Abstract
Abstract In this study investigated changes in antioxidant system and photosystem II (PSII) in spring barley (Hordeum vulgare L.) leaves after acute γ-radiation exposure at four growth stages. Growth stages: 4 leaves unfolded (Z 14) and 5 leaves unfolded (Z 15), 1st node detectable (Z 31), flag leaf sheath extending (Z 41) and 1/4 of inflorescence emerged (Z 53) according to the international phenological Zadox scale. Plants were irradiated with doses of 15, 30, 45, and 60 Gy at a rate of 16 Gy/h. The flavonoids content was observed as the plants grew, reaching maximum values at the stage Z 53; after γ-irradiation no changes in the content at the studied stages were detected. The MDA content at all growth stages varied within the control range. Proline content remained unchanged compared to control values 48 h post-irradiation. Chl a, Chl b, and carotenoids content did not differ from controls 72 h after irradiation at stages Z 14–Z 15, Z 31, and Z 41, however, at stage Z 53, a 36% decrease in pigments in studied doses range was observed. Photosystem II (PS II) proved to be quite resistant to the effects of acute γ-irradiation in the early stages (Z 14–Z 41), with the exception of the stage Z 53, where a decrease chlorophyll fluorescence was observed. The ascorbic acid (AsA) and reduced glutathione (GSH) content, and the total reducing activity index increased (p < 0.05) at stages Z 31, Z 41 and Z 53 after irradiation in the studied doses range relative to the control. Thus, during the first three days after γ-irradiation of barley plants in high doses, activation of the components of the ascorbate-glutathione cycle was noted.
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Claims 10
Claim · model-written summary
Flavonoid content reached its maximum at stage Z 53 during growth.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Organ / stage
- stage Z 53e0
- Outcome
- flavonoids contente0
- Direction
- reaching maximum valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The flavonoids content was observed as the plants grew, reaching maximum values at the stage Z 53”
t0“Barley”
Claim · model-written summary
Gamma irradiation did not change flavonoid content at the studied stages.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- γ-irradiatione0
- Outcome
- contente0
- Direction
- no changese0
- Qualifier
- studied stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after γ-irradiation no changes in the content at the studied stages were detected”
t0“Barley”
Claim · model-written summary
MDA content remained within the control range at all growth stages.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- MDA contente0
- Direction
- within the control rangee0
- Comparator
- control rangee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MDA content at all growth stages varied within the control range”
t0“Barley”
Claim · model-written summary
Proline content was unchanged 48 hours after irradiation relative to control.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- post-irradiatione0
- Outcome
- Proline contente0
- Direction
- remained unchangede0
- Qualifier
- 48 he0
- Comparator
- control valuese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proline content remained unchanged compared to control values 48 h post-irradiation”
t0“Barley”
Claim · model-written summary
Chlorophyll a, chlorophyll b and carotenoid contents did not differ from controls at early stages.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- irradiatione0
- Outcome
- Chl a, Chl b, and carotenoids contente0
- Direction
- did not differe0
- Qualifier
- 72 h after irradiation at stages Z 14–Z 15, Z 31, and Z 41e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chl a, Chl b, and carotenoids content did not differ from controls 72 h after irradiation at stages Z 14–Z 15, Z 31, and Z 41”
t0“Barley”
Claim · model-written summary
Pigments decreased by 36% after irradiation at stage Z 53.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- stage Z 53e0
- Treatment
- studied doses rangee0
- Outcome
- pigmentse0
- Direction
- decreasee0
- Value
- 36%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at stage Z 53, a 36% decrease in pigments in studied doses range was observed”
t0“Barley”
Claim · model-written summary
Photosystem II was resistant to acute irradiation during stages Z 14 to Z 41.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- acute γ-irradiatione0
- Outcome
- Photosystem II (PS II)e0
- Qualifier
- early stages (Z 14–Z 41)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosystem II (PS II) proved to be quite resistant to the effects of acute γ-irradiation in the early stages (Z 14–Z 41)”
t0“Barley”
Claim · model-written summary
Chlorophyll fluorescence decreased after irradiation at stage Z 53.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- stage Z 53e0
- Outcome
- chlorophyll fluorescencee0
- Direction
- decreasee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stage Z 53, where a decrease chlorophyll fluorescence was observed”
t0“Barley”
Claim · model-written summary
Ascorbic acid and reduced glutathione contents increased after irradiation at stages Z 31, Z 41 and Z 53.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- stages Z 31, Z 41 and Z 53e0
- Treatment
- irradiation in the studied doses rangee0
- Outcome
- ascorbic acid (AsA) and reduced glutathione (GSH) contente0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ascorbic acid (AsA) and reduced glutathione (GSH) content, and the total reducing activity index increased (p < 0.05) at stages Z 31, Z 41 and Z 53 after irradiation in the studied doses range relative to the control”
t0“Barley”
Claim · model-written summary
Total reducing activity increased after irradiation at stages Z 31, Z 41 and Z 53.
- Taxon
- BarleyHordeum vulgaret0
- Organ / stage
- stages Z 31, Z 41 and Z 53e0
- Treatment
- irradiation in the studied doses rangee0
- Outcome
- total reducing activity indexe0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ascorbic acid (AsA) and reduced glutathione (GSH) content, and the total reducing activity index increased (p < 0.05) at stages Z 31, Z 41 and Z 53 after irradiation in the studied doses range relative to the control”
t0“Barley”
The same questions in other papers
radiation · physiology: pigments · Hordeum vulgare (barley)Positive and negative results
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- positive
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1 paper in the same direction as this paper
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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.