Abstract
Alterations in photosynthetic capacity of primary leaves of wheat seedlings in response to ultraviolet-B (UV-B; 280-320 nm; 60 µmol m-2 s-1) exposure alone and in combination with photosynthetically active radiation (PAR; 400-800 nm; 200 µmol m-2 s-1) during different phases of leaf growth and development were assessed. UV-B exposure resulted in a phase-dependent differential loss in photosynthetic pigments, photochemical potential, photosystem 2 (PS2) quantum yield, and in vivo O2 evolution. UV-B exposure induced maximum damage to the photosynthetic apparatus during senescence phase of development. The damages were partially alleviated when UV-B exposure was accompanied by PAR. UV-B induced an enhancement in accumulation of flavonoids during all phases of development while it caused a decline in anthocyanin content during senescence. The differential changes in these parameters demonstrated the adaptation ability of leaves to UV-B stress during all phases of development and the ability was modified in UV-B+ PAR exposed samples.
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Claims 7
Claim · model-written summary
UV-B exposure caused a phase-dependent loss of photosynthetic pigments, photochemical potential and PS2 quantum yield in primary wheat leaves.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- primary leavese0
- Treatment
- UV-B exposuree1
- Outcome
- photosynthetic pigments, photochemical potential, photosystem 2 (PS2) quantum yielde1
- Direction
- losse1
- Qualifier
- phase-dependente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e1“UV-B exposure resulted in a phase-dependent differential loss in photosynthetic pigments, photochemical potential, photosystem 2 (PS2) quantum yield, and in vivo O2 evolution”
Claim · model-written summary
UV-B exposure caused a phase-dependent loss of in vivo O2 evolution in primary wheat leaves.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- primary leavese0
- Treatment
- UV-B exposuree1
- Outcome
- in vivo O2 evolutione1
- Direction
- losse1
- Qualifier
- phase-dependente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e1“UV-B exposure resulted in a phase-dependent differential loss in photosynthetic pigments, photochemical potential, photosystem 2 (PS2) quantum yield, and in vivo O2 evolution”
Claim · model-written summary
UV-B exposure induced maximum damage to the photosynthetic apparatus during the senescence phase.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- senescence phase of developmente2
- Treatment
- UV-B exposuree2
- Outcome
- damage to the photosynthetic apparatuse2
- Direction
- maximume2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e2“UV-B exposure induced maximum damage to the photosynthetic apparatus during senescence phase of development”
Claim · model-written summary
Accompanying UV-B exposure with PAR partially alleviated the damage to wheat leaf photosynthesis.
- Taxon
- wheatTriticum aestivume0
- Treatment
- PARe3
- Outcome
- damagese3
- Direction
- partially alleviatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e3“The damages were partially alleviated when UV-B exposure was accompanied by PAR”
Claim · model-written summary
UV-B induced an enhancement in flavonoid accumulation in wheat leaves during all phases of development.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- all phases of developmente4
- Treatment
- UV-Be4
- Outcome
- accumulation of flavonoidse4
- Direction
- enhancemente4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e4“UV-B induced an enhancement in accumulation of flavonoids during all phases of development while it caused a decline in anthocyanin content during senescence”
Claim · model-written summary
UV-B caused a decline in anthocyanin content in wheat leaves during senescence.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- senescencee4
- Treatment
- UV-Be4
- Outcome
- anthocyanin contente4
- Direction
- declinee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e4“UV-B induced an enhancement in accumulation of flavonoids during all phases of development while it caused a decline in anthocyanin content during senescence”
Claim · model-written summary
The authors interpret the differential changes as showing the adaptation ability of wheat leaves to UV-B stress during all phases of development.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- all phases of developmente5
- Outcome
- adaptation ability of leaves to UV-B stresse5
- Qualifier
- the ability was modified in UV-B+ PAR exposed samplese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic capacity of primary leaves of wheat seedlings”
e5“The differential changes in these parameters demonstrated the adaptation ability of leaves to UV-B stress during all phases of development and the ability was modified in UV-B+ PAR exposed samples”
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See all 9 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.