INVESTIGADORES
ROSA Mariana Daniela
artículos
Título:
Solar and supplemental UV-B radiation effects in lemon peel flavonoid content seasonal variations
Autor/es:
HILAL, MIRNA; RODRIGUEZ MONTELONGO, LUISA; ROSA, MARIANA; GALLARDO, MIRIAM; GONZÁLEZ, JUAN ANTONIO; INTERDONATO, ROQUE; RAPISARDA, VIVIANA; PRADO, FERNANDO
Revista:
PHOTOCHEMISTRY AND PHOTOBIOLOGY
Editorial:
Allen Press
Referencias:
Lugar: Lawrence - USA; Año: 2008 vol. 84 p. 1480 - 1486
ISSN:
0031-8655
Resumen:
Effects of solar and supplemental UV-B radiation on UV-Babsorbing
compounds and malondialdehyde (MDA) accumulations
in the peel of lemons collected in summer and winter were
analyzed. UV-B-absorbing compounds were higher in flavedo
than in albedo tissue in both seasons; however, the highest values
were observed in summer. These compounds were also higher in
outer than in inner flavedo surface. Lemons were categorized as
sun-, semisun- and shaded-lemon according to localization inside
the tree canopy. Depending on-tree localization UV-B-absorbing
compounds were higher in flavedo of sun-lemon than in semisunand
shaded-lemon. Supplementary UV-B radiation (22 kJ m)2)2
day)1 UV-BBE) induced UV-B-absorbing compound synthesis in
on-tree and postharvest lemons. Two minutes of supplemental
UV-B irradiation in summer lemons produced a strong increment
(300%) of UV-B-absorbing compound content, whereas in
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
on-tree and postharvest lemons. Two minutes of supplemental
UV-B irradiation in summer lemons produced a strong increment
(300%) of UV-B-absorbing compound content, whereas in
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
)1 UV-BBE) induced UV-B-absorbing compound synthesis in
on-tree and postharvest lemons. Two minutes of supplemental
UV-B irradiation in summer lemons produced a strong increment
(300%) of UV-B-absorbing compound content, whereas in
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
%) of UV-B-absorbing compound content, whereas in
winter lemons a slight increase (30%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.
%) was observed only after
3 min of irradiation. By contrast, UV-B-absorbing compound
accumulation was not observed in albedo. MDA accumulation
showed approximately a similar trend of UV-B-absorbing
compounds. According to our results, solar UV-B was not
required for UV-B-absorbing compound accumulation in lemon
peel. Relationships between UV-B-absorbing compounds, MDA,
reactive oxygen species and pathogen protection are also
discussed.