Abstract
Senescence induced loss in pigments and proteins of detached maize (Zea mays L. cv. Col) leaves was significantly enhanced on the exposure of leaves to different ranges of ultraviolet (UV) radiation. Compared to UV-A (320-400 nm) and UV-B (280-320 nm), the UV-C (200-320 nm) was the most damaging for the pigments and macromolecules. A severe decline in photosystem (PS) 2 mediated photoreduction during senescence of detached leaves exposed to UV irradiation suggested a damage of the system. The PS1 mediated photoreduction of methylviologen with 2,6-dichlorophenol indophenol as electron donor was stimulated by UV-A and UV-B radiations, suggesting a reorganisation of the PS1 complex. These results were fortified by the values of fast and slow kinetics of chlorophyll (Chl) a fluorescence transients.
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Claims 6
Claim · model-written summary
UV exposure significantly enhanced senescence-associated pigment and protein loss.
- Material
- cv. Cole0
- Organ / stage
- leavese0
- Treatment
- different ranges of ultraviolet (UV) radiatione0
- Outcome
- loss in pigments and proteinse0
- Direction
- enhancede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Senescence induced loss in pigments and proteins of detached maize (Zea mays L. cv. Col) leaves was significantly enhanced on the exposure of leaves to different ranges of ultraviolet (UV) radiation”
Claim · model-written summary
UV-C was most damaging to pigments and macromolecules compared with UV-A and UV-B.
- Treatment
- UV-C (200-320 nm)e0
- Outcome
- pigments and macromoleculese0
- Direction
- most damaginge0
- Comparator
- UV-A (320-400 nm) and UV-B (280-320 nm)e0
Not reportedTaxon
Verbatim
e0“Compared to UV-A (320-400 nm) and UV-B (280-320 nm), the UV-C (200-320 nm) was the most damaging for the pigments and macromolecules”
Claim · model-written summary
UV irradiation caused a severe decline in PS2-mediated photoreduction during leaf senescence.
- Organ / stage
- detached leavese0
- Treatment
- UV irradiatione0
- Outcome
- photosystem (PS) 2 mediated photoreductione0
- Direction
- declinee0
Not reportedTaxonComparator
Verbatim
e0“A severe decline in photosystem (PS) 2 mediated photoreduction during senescence of detached leaves exposed to UV irradiation suggested a damage of the system”
Claim · model-written summary
UV-A stimulated PS1-mediated photoreduction.
Not reportedTaxonComparator
Verbatim
e0“The PS1 mediated photoreduction of methylviologen with 2,6-dichlorophenol indophenol as electron donor was stimulated by UV-A and UV-B radiations”
Claim · model-written summary
UV-B stimulated PS1-mediated photoreduction.
Not reportedTaxonComparator
Verbatim
e0“The PS1 mediated photoreduction of methylviologen with 2,6-dichlorophenol indophenol as electron donor was stimulated by UV-A and UV-B radiations”
Claim · model-written summary
Fluorescence transient kinetics supported the reported photosystem responses.
- Outcome
- fast and slow kinetics of chlorophyll (Chl) a fluorescence transientse0
Not reportedTaxon
Verbatim
e0“These results were fortified by the values of fast and slow kinetics of chlorophyll (Chl) a fluorescence transients”
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See all 10 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.